blocks|key|3125196|text|当然，你可以创建一个html模板，我也会推荐一个文本模板。在模板中，您只需将BODY放在要放置body的位置，然后您就可以读取模板并用新内容替换body。您可以使用.Nets邮件类发送电子邮件。在最初创建电子邮件后，您只需循环将电子邮件发送给所有收件人。对我来说很有吸引力。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3125197|using+System.Net.Mail;

//+Email+content
string+HTMLTemplatePath+=+@"path";
string+TextTemplatePath+=+@"path";
string+HTMLBody+=+"";
string+TextBody+=+"";

HTMLBody+=+File.ReadAllText(HTMLTemplatePath);
TextBody+=+File.ReadAllText(TextTemplatePath);

HTMLBody+=+HTMLBody.Replace(["[BODY]",+content);
TextBody+=+HTMLBody.Replace(["[BODY]",+content);

//+Create+email+code
MailMessage+m+=+new+MailMessage();

m.From+=+new+MailAddress("address@gmail.com",+"display+name");
m.To.Add("address@gmail.com");
m.Subject+=+"subject";

AlternateView+plain+=+AlternateView.CreateAlternateViewFromString(_EmailBody+%2B+text,+new+System.Net.Mime.ContentType("text/plain"));
AlternateView+html+=+AlternateView.CreateAlternateViewFromString(_EmailBody+%2B+body,+new+System.Net.Mime.ContentType("text/html"));
mail.AlternateViews.Add(plain);
mail.AlternateViews.Add(html);

SmtpClient+smtp+=+new+SmtpClient("server");
smtp.Send(m);|code-block|syntax|javascript|3125198|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Sure you can create an html template and I would recommend also a text template. In the template you can just put [BODY] in the place where the body would be placed and then you can just read in the template and replace the body with the new content. You can send 
the email using .Nets Mail Class. You just have to loop through the sending of the email to all recipients after you create the email initially. Worked like a charm for me.

<pre><code>using System.Net.Mail;

// Email content
string HTMLTemplatePath = @"path";
string TextTemplatePath = @"path";
string HTMLBody = "";
string TextBody = "";

HTMLBody = File.ReadAllText(HTMLTemplatePath);
TextBody = File.ReadAllText(TextTemplatePath);

HTMLBody = HTMLBody.Replace(["[BODY]", content);
TextBody = HTMLBody.Replace(["[BODY]", content);

// Create email code
MailMessage m = new MailMessage();

m.From = new MailAddress("address@gmail.com", "display name");
m.To.Add("address@gmail.com");
m.Subject = "subject";

AlternateView plain = AlternateView.CreateAlternateViewFromString(_EmailBody + text, new System.Net.Mime.ContentType("text/plain"));
AlternateView html = AlternateView.CreateAlternateViewFromString(_EmailBody + body, new System.Net.Mime.ContentType("text/html"));
mail.AlternateViews.Add(plain);
mail.AlternateViews.Add(html);

SmtpClient smtp = new SmtpClient("server");
smtp.Send(m);
</code></pre>

blocks|key|3338142|text|如果您能够允许ASPNET和相关用户对文件进行读写操作，则可以轻松地使用带有标准String.Format()占位符({0}、{1:C}等)的HTML文件。来实现这一点。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3338143|只需使用System.IO名称空间中的类以字符串形式读取文件即可。获得该字符串后，将其作为第一个参数传递给String.Format()，并提供参数。|3338144|保持该字符串不变，并将其用作电子邮件的正文，基本上就完成了。我们今天在几十个(诚然很小)的网站上这样做，并且没有任何问题。|3338145|我要指出的是，如果(a)你不会一次发送无数封电子邮件，(b)你不会对每封电子邮件都进行个性化(否则你会消耗大量的字符串)，(c)+HTML文件本身相对较小，那么这种方法效果最好。|3338146|entityMap^0|14|F|1N|3|1R|5|0|4|9|1H|F|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|C]|$9|S|A|T|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|Z|8|@]|D|@]|E|$]]|$1|J|3|K|5|6|7|10|8|@]|D|@]|E|$]]|$1|L|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|M|$]]

If you are able to allow the ASPNET and associated users permission to read &amp; write a file, you can easily use an HTML file with standard <code>String.Format()</code> placeholders (<code>{0}</code>, <code>{1:C}</code>, etc.) to accomplish this. 

Merely read in the file, as a string, using classes from the <code>System.IO</code> namespace. Once you have that string, pass it as the first argument to <code>String.Format()</code>, and provide the parameters.

Keep that string around, and use it as the body of the e-mail, and you're essentially done. We do this on dozens of (admittedly small) sites today, and have had no issues.

I should note that this works best if (a) you're not sending zillions of e-mails at a time, (b) you're not personalizing each e-mail (otherwise you eat up a ton of strings) and (c) the HTML file itself is relatively small.

blocks|key|351209|text|你可以试试MailDefinition+class|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|351210|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.microsoft.com/en-us/dotnet/api/system.web.ui.webcontrols.maildefinition^0|5|K|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

You could try the <a href="https://docs.microsoft.com/en-us/dotnet/api/system.web.ui.webcontrols.maildefinition" rel="nofollow noreferrer">MailDefinition class</a>

blocks|key|351219|text|如果您想要传递用户名、产品名称等参数...等，你可以使用开源模板引擎NVelocity来产生你的最终电子邮件/超文本标记语言。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|351220|NVelocity模板(MailTemplate.vm)示例：|style|BOLD|351221|A+sample+email+template+by+$name.
<br+/>

Foreach+example+:
<br+/>++++
#foreach+($item+in+$itemList)

[Date:+$item.Date]+Name:+$item.Name,+Value:+$itemValue.Value
<br+/><br+/>

#end|code-block|syntax|javascript|351222|在应用程序中通过MailTemplate.vm生成邮件正文：|351223|VelocityContext+context+=+new+VelocityContext();
context.Put("name",+"ScarletGarden");
context.Put("itemList",+itemList);

StringWriter+writer+=+new+StringWriter();

Velocity.MergeTemplate("MailTemplate.vm",+context,+writer);

string+mailBody+=+writer.GetStringBuilder().ToString();|351224|结果邮件正文为：|351225|ScarletGarden.提供的|351226|示例电子邮件模板|blockquote|351227|351228|Foreach示例：|351229|日期:+12.02.2009名称:项目1，值:+09|351230|日期:+21.02.2009名称:第4项，价值:+52|351231|日期:+01.03.2009名称:第2项，值:+21|351232|日期:+23.03.2009名称:第6项，取值:+24|351233|351234|对于编辑模板，也许您可以使用FCKEditor并将模板保存到文件中。|351235|entityMap|0|LINK|mutability|MUTABLE|url|http://nvelocity.sourceforge.net/|1|http://www.fckeditor.net/^0|Y|9|0|0|C|F|0|0|0|0|0|0|D|0|0|0|0|0|0|0|0|0|E|9|1|0^^$0|@$1|2|3|4|5|6|7|1L|8|@]|9|@$A|1M|B|1N|1|1O]]|C|$]]|$1|D|3|E|5|6|7|1P|8|@$A|1Q|B|1R|F|G]]|9|@]|C|$]]|$1|H|3|I|5|J|7|1S|8|@]|9|@]|C|$K|L]]|$1|M|3|N|5|6|7|1T|8|@]|9|@]|C|$]]|$1|O|3|P|5|J|7|1U|8|@]|9|@]|C|$K|L]]|$1|Q|3|R|5|6|7|1V|8|@]|9|@]|C|$]]|$1|S|3|T|5|6|7|1W|8|@$A|1X|B|1Y|F|G]]|9|@]|C|$]]|$1|U|3|V|5|W|7|1Z|8|@]|9|@]|C|$]]|$1|X|3|-4|5|6|7|20|8|@]|9|@]|C|$]]|$1|Y|3|Z|5|6|7|21|8|@]|9|@]|C|$]]|$1|10|3|11|5|6|7|22|8|@]|9|@]|C|$]]|$1|12|3|13|5|6|7|23|8|@]|9|@]|C|$]]|$1|14|3|15|5|6|7|24|8|@]|9|@]|C|$]]|$1|16|3|17|5|6|7|25|8|@]|9|@]|C|$]]|$1|18|3|-4|5|6|7|26|8|@]|9|@]|C|$]]|$1|19|3|1A|5|6|7|27|8|@]|9|@$A|28|B|29|1|2A]]|C|$]]|$1|1B|3|-4|5|6|7|2B|8|@]|9|@]|C|$]]]|1C|$1D|$5|1E|1F|1G|C|$1H|1I]]|1J|$5|1E|1F|1G|C|$1H|1K]]]]

If you want to pass parameters like user names, product names, ... etc. you can use open source template engine <a href="http://nvelocity.sourceforge.net/" rel="noreferrer">NVelocity</a> to produce your final email / HTML's.

An example of NVelocity template (MailTemplate.vm) : 

<pre><code>A sample email template by &lt;b&gt;$name&lt;/b&gt;.
&lt;br /&gt;

Foreach example :
&lt;br /&gt; 
#foreach ($item in $itemList)

[Date: $item.Date] Name: $item.Name, Value: $itemValue.Value
&lt;br /&gt;&lt;br /&gt;

#end
</code></pre>

Generating mail body by MailTemplate.vm in your application : 

<pre><code>VelocityContext context = new VelocityContext();
context.Put("name", "ScarletGarden");
context.Put("itemList", itemList);

StringWriter writer = new StringWriter();

Velocity.MergeTemplate("MailTemplate.vm", context, writer);

string mailBody = writer.GetStringBuilder().ToString();
</code></pre>

The result mail body is :

<blockquote>
 A sample email template by
 ScarletGarden.
 
 Foreach example :
 
 [Date: 12.02.2009] Name: Item 1,
 Value: 09
 
 [Date: 21.02.2009] Name: Item 4,
 Value: 52
 
 [Date: 01.03.2009] Name: Item 2,
 Value: 21
 
 [Date: 23.03.2009] Name: Item 6,
 Value: 24
</blockquote>

For editing the templates, maybe you can use <a href="http://www.fckeditor.net/" rel="noreferrer">FCKEditor</a> and save your templates to files.

blocks|key|3125282|text|以某种方式使用.ASPX页面作为模板，然后告诉我的代码为该页面提供服务，并使用为电子邮件返回的|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3125283|。|blockquote|3125284|3125285|3125286|您可以很容易地构造一个WebRequest来访问ASPX页面并获得结果HTML。只需多做一点工作，就可以在没有WebRequest的情况下完成它。一个PageParser和一个Response.Filter可以让你运行页面并捕获output...though，也许还有一些更好的方式。|3125287|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$]]|$1|E|3|-4|5|6|7|M|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|N|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|P|8|@]|9|@]|A|$]]]|J|$]]

<blockquote>
 What would be ideal what be to use a .ASPX page as a template somehow, then just tell my code to serve that page, and use the HTML returned for the email.
</blockquote>

You could easily just construct a WebRequest to hit an ASPX page and get the resultant HTML. With a little more work, you can probably get it done without the WebRequest. A PageParser and a Response.Filter would allow you to run the page and capture the output...though there may be some more elegant ways.

blocks|key|347749|text|您可能还想尝试加载一个控件，然后将其呈现为字符串并将其设置为HTML正文：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|347750|//+Declare+stringbuilder+to+render+control+to
StringBuilder+sb+=+new+StringBuilder();

//+Load+the+control
UserControl+ctrl+=+(UserControl)+LoadControl("~/Controls/UserControl.ascx");

//+Do+stuff+with+ctrl+here

//+Render+the+control+into+the+stringbuilder
StringWriter+sw+=+new+StringWriter(sb);
Html32TextWriter+htw+=+new+Html32TextWriter(sw);
ctrl.RenderControl(htw);

//+Get+full+body+text
string+body+=+sb.ToString();|code-block|syntax|javascript|347751|然后你可以像往常一样构造你的电子邮件：|347752|MailMessage+message+=+new+MailMessage();
message.From+=+new+MailAddress("from@email.com",+"from+name");
message.Subject+=+"Email+Subject";
message.Body+=+body;
message.BodyEncoding+=+Encoding.ASCII;
message.IsBodyHtml+=+true;

SmtpClient+smtp+=+new+SmtpClient("server");
smtp.Send(message);|347753|您的用户控件可以包含其他控件，如页眉和页脚，还可以利用数据绑定等功能。|347754|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

You might also want to try loading a control, and then rendering it to a string and setting that as the HTML Body:

<pre><code>// Declare stringbuilder to render control to
StringBuilder sb = new StringBuilder();

// Load the control
UserControl ctrl = (UserControl) LoadControl("~/Controls/UserControl.ascx");

// Do stuff with ctrl here

// Render the control into the stringbuilder
StringWriter sw = new StringWriter(sb);
Html32TextWriter htw = new Html32TextWriter(sw);
ctrl.RenderControl(htw);

// Get full body text
string body = sb.ToString();
</code></pre>

You could then construct your email as usual:

<pre><code>MailMessage message = new MailMessage();
message.From = new MailAddress("from@email.com", "from name");
message.Subject = "Email Subject";
message.Body = body;
message.BodyEncoding = Encoding.ASCII;
message.IsBodyHtml = true;

SmtpClient smtp = new SmtpClient("server");
smtp.Send(message);
</code></pre>

You user control could contain other controls, such as a header and footer, and also take advantage of functionality such as data binding.

blocks|key|351268|text|设置Set+the+Email+Message+IsBodyHtml+=+true|type|unstyled|depth|inlineStyleRanges|entityRanges|data|351269|获取包含电子邮件内容的对象，序列化该对象，并使用xml/xslt生成html内容。|351270|如果您想使用xslt，那么只需要使用不同的AlternateViews模板来创建纯文本内容。|351271|这样做的一个主要优点是，如果想要更改布局，只需更新xslt模板即可。|351272|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

Set the set the Email Message IsBodyHtml = true

Take your object that contains your email contents Serialize the object 
and use xml/xslt to generate the html content. 

If you want to do AlternateViews do the same thing that jmein only use a different xslt template to create the plain text content.

one of the major advantages to this is if you want to change your layout all you have to do update the xslt template.

blocks|key|348569|text|我认为你也可以这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|348570|创建和.aspx页面，并将其放在OnLoad方法的末尾，或者手动调用它。|348571|++++StringBuilder+sb+=+new+StringBuilder();
++++StringWriter+sw+=+new+StringWriter(sb);
++++HtmlTextWriter+htmlTW+=+new+HtmlTextWriter(sw);
++++this.Render(htmlTW);|code-block|syntax|javascript|348572|我不确定这是否有任何潜在的问题，但它看起来会工作。这样，您就可以使用功能齐全的.aspx页面，而不是只支持文本替换的MailDefinition类。|348573|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

I think you could also do something like this:

Create and .aspx page, and put this at the end of the OnLoad method, or call it manually.

<pre><code> StringBuilder sb = new StringBuilder();
 StringWriter sw = new StringWriter(sb);
 HtmlTextWriter htmlTW = new HtmlTextWriter(sw);
 this.Render(htmlTW);
</code></pre>

I'm not sure if there are any potential issues with this, but it looks like it would work. This way, you could use a full featured .aspx page, instead of the MailDefinition class which only supports Text replacements.

blocks|key|3125360|text|如果灵活性是您的先决条件之一，那么XSLT可能是一个不错的选择，.NET框架完全支持XSLT，您甚至可以让用户编辑这些文件。这篇文章(http://www.aspfree.com/c/a/XML/XSL-Transformations-using-ASP-NET/)可能对入门有用(msdn有更多关于它的信息)。正如ScarletGarden所说，NVelocity是另一个不错的选择，但我更喜欢它的“内置”.NET框架支持和平台无关性。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3125361|entityMap|0|LINK|mutability|MUTABLE|url|http://www.aspfree.com/c/a/XML/XSL-Transformations-using-ASP-NET/^0|1V|1T|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

If flexibility is one of your prerequisites, XSLT might be a good choice, which is completely supported by .NET framework and you would be able to even let the user edit those files. This article (<a href="http://www.aspfree.com/c/a/XML/XSL-Transformations-using-ASP-NET/" rel="noreferrer">http://www.aspfree.com/c/a/XML/XSL-Transformations-using-ASP-NET/</a>) might be useful for a start (msdn has more info about it).
As said by ScarletGarden NVelocity is another good choice but I do prefer XSLT for its " built-in" .NET framework support and platform agnostic.

blocks|key|351304|text|我在其中一个项目上有类似的要求，你必须每天发送大量的电子邮件，客户想要完全控制不同类型的电子邮件的html模板。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|351305|由于要发送大量电子邮件，性能是主要问题。|351306|我们提出的是sql+server中的静态内容，您可以在其中为不同类型的电子邮件保存整个html模板标记(以及占位符，如UserFirstName、UserLastName，它们在运行时会被实际数据替换)。|351307|然后，我们将这些数据加载到asp.net缓存中，这样我们就不会一遍又一遍地读取html模板，而只是在它们实际发生更改时才读取|351308|我们给了客户端一个WYSIWYG编辑器，通过管理web表单修改这些模板。无论何时进行更新，我们都会重置asp.net缓存。|351309|然后我们有一个单独的电子邮件日志表-其中记录了每封要发送的电子邮件。该表具有名为emailType、emailSent和numberOfTries的字段。|351310|对于需要尽快发送的重要电子邮件类型(如新成员注册、忘记密码)，我们只需每5分钟运行一次作业|351311|对于不太重要的电子邮件类型(如促销电子邮件、新闻电子邮件等)，我们每15分钟运行一次作业|351312|这样，您就不会阻止您的服务器发送不间断的电子邮件，并且您可以批量处理邮件。发送电子邮件后，将emailSent字段设置为1。|351313|entityMap^0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|V|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|W|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|X|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|Y|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|Z|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|10|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|11|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|S|$]]

i had a similar requirement on 1 of the projects where you had to send huge number of emails each day, and the client wanted complete control over html templates for different types of emails.

due to the large number of emails to be sent, performance was a primary concern.

what we came up with was static content in sql server where you save entire html template mark up (along with place holders, like [UserFirstName], [UserLastName] which are replaced with real data at run time) for different types of emails

then we loaded this data in asp.net cache - so we dont read the html templates over and over again - but only when they are actually changed

we gave the client a WYSIWYG editor to modify these templates via a admin web form. whenever updates were made, we reset asp.net cache.

and then we had a seperate table for email logs - where every email to be sent was logged. this table had fields called emailType, emailSent and numberOfTries. 

we simply ran a job every 5 minutes for important email types (like new member sign up, forgot password) which need to be sent asap

we ran another job every 15 minutes for less important email types (like promotion email, news email, etc)

this way you dont block your server sending non stop emails and you process mails in batch. once an email is sent you set the emailSent field to 1.

blocks|key|348601|text|这样做时要小心，垃圾邮件过滤器似乎会阻止ASP.net生成的html，显然是因为ViewState，所以如果您要这样做，请确保生成的Html是干净的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|348602|我个人会考虑使用Asp.net+MVC来实现您想要的结果。或者NVelocity在这方面做得很好。|offset|length|348603|entityMap|0|LINK|mutability|MUTABLE|url|http://www.castleproject.org/others/nvelocity/index.html^0|0|V|9|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

Be careful when doing this, SPAM filters seem to block ASP.net generated html, apparently because of ViewState, so if you are going to do this make sure the Html produced is clean.

I personally would look into using Asp.net MVC to achieve your desired results. or <a href="http://www.castleproject.org/others/nvelocity/index.html" rel="nofollow noreferrer">NVelocity</a> is quite good at this

blocks|key|3125418|text|看看SubSonic+(www.subsonicproject.com)吧。他们这样做正是为了生成代码--模板是标准的ASPX，它输出c#。同样的方法也可以在您的场景中重用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3125419|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Look at SubSonic (www.subsonicproject.com). They're doing exactly this to generate code - the template is standard ASPX, and it outputs c#. The same method would be reusable for your scenario.

blocks|key|346379|text|我会使用像TemplateMachine这样的模板库。这允许您将电子邮件模板与普通文本放在一起，然后根据需要使用规则来注入/替换值。与Ruby中的ERB非常相似。这允许您分离邮件内容的生成，而不会将您与ASPX等内容捆绑在一起，然后一旦生成了内容，您就可以通过电子邮件发送。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|346380|entityMap|0|LINK|mutability|MUTABLE|url|http://www.stefansarstedt.com/templatemaschine.html^0|5|F|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

I'd use a templating library like <a href="http://www.stefansarstedt.com/templatemaschine.html" rel="nofollow noreferrer">TemplateMachine</a>. this allows you mostly put your email template together with normal text and then use rules to inject/replace values as necessary. Very similar to ERB in Ruby. This allows you to separate the generation of the mail content without tying you too heavily to something like ASPX etc. then once the content is generated with this, you can email away.

blocks|key|3338417|text|我喜欢Raj的回答。像ListManager这样的程序和像DNN这样的框架做类似的事情，如果需要非技术用户轻松地编辑，所见即所得编辑器修改存储在SQL中的HTML是一种非常简单、直接的方法，并且可以很容易地独立于页脚等编辑页眉，以及使用标记动态插入值。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3338418|如果使用上面的方法(实际上是any+)，需要记住的一件事是严格并小心地确定您允许编辑器插入的样式和标记的类型。如果你认为浏览器很挑剔，那就等着看一下电子邮件客户端是如何呈现相同的东西的……|3338419|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I like Raj's answer. Programs like ListManager &amp; frameworks like DNN do similar things, and if easy editing by non-technical users is required, WYSIWYG editors to modify HTML stored in SQL is a mostly easy, straightforward way to go and can easily accommodate editing headers independently from footers, etc, as well as using tokens to dynamically insert values. 

One thing to keep in mind if using the above method (or any, really) is to be strict and careful about which types of styling and tags you allow the editors to insert. If you think browsers are finicky, just wait until you see how differently email clients render the same thing...

blocks|key|3125488|text|这里还有一个对更复杂的电子邮件模板使用XSL转换的替代方案：。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3125489|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Here is one more alternative that uses XSL transformations for more complex email templates: <a href="http://alekdavis.blogspot.com/2009/08/sending-html-based-email-from-net.html" rel="nofollow noreferrer">Sending HTML-based email from .NET applications</a>.

blocks|key|3125507|text|请注意，aspx和aspx解决方案需要当前的HttpContext，因此不能在没有大量工作的情况下异步使用(例如在线程中)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3125508|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Note that the aspx and ascx solutions require a current HttpContext, so cannot be used asynchronously (eg in threads) without a lot of work.

blocks|key|351370|text|与Canavar的答案类似，但我始终使用"StringTemplate“代替NVelocity，它用于从配置文件加载模板，或使用File.ReadAllText()加载外部文件并设置值。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|351371|这是一个Java项目，但C#端口是可靠的，我已经在几个项目中使用过它(只是使用外部文件中的模板将其用于电子邮件模板)。|351372|替代方案总是好的。|351373|entityMap|0|LINK|mutability|MUTABLE|url|http://www.stringtemplate.org/^0|L|E|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]]]

Similar to Canavar's answer, but instead of NVelocity, I always use "<a href="http://www.stringtemplate.org/" rel="nofollow noreferrer">StringTemplate</a>"
which I load the template from a configuration file, or load an external file using File.ReadAllText() and set the values.

It's a Java project but the C# port is solid and I've used it in several projects (just used it for email templating using the template in an external file).

Alternatives are always good.

blocks|key|3125600|text|Mail.dll+email+component包括电子邮件模板引擎：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3125601|以下是语法概述：|3125602|<html>
<body>
Hi+{FirstName}+{LastName},

Here+are+your+orders:+
{foreach+Orders}
++++Order+'{Name}'+sent+to+{Street}.+
{end}

</body>
</html>|code-block|syntax|javascript|3125603|以及加载模板、从c#对象填充数据并发送电子邮件的代码：|3125604|Mail.Html(Template
++++++++++++++.FromFile("template.txt")
++++++++++++++.DataFrom(_contact)
++++++++++++++.Render())
++++.Text("This+is+text+version+of+the+message.")
++++.From(new+MailBox("alice@mail.com",+"Alice"))
++++.To(new+MailBox("bob@mail.com",+"Bob"))
++++.Subject("Your+order")
++++.UsingNewSmtp()
++++.WithCredentials("alice@mail.com",+"password")
++++.Server("mail.com")
++++.WithSSL()
++++.Send();|3125605|你可以在email+template+engine博客上获得更多信息。|3125606|或者只是下载Mail.dll+email+component并尝试一下。|3125607|请注意，这是我创建的商业产品。|3125608|entityMap|0|LINK|mutability|MUTABLE|url|http://www.lesnikowski.com/mail/|1|http://www.lesnikowski.com/blog/index.php/email-template-engine/|2^0|0|O|0|0|0|0|0|0|4|L|1|0|6|O|2|0|0^^$0|@$1|2|3|4|5|6|7|15|8|@]|9|@$A|16|B|17|1|18]]|C|$]]|$1|D|3|E|5|6|7|19|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|1A|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|1B|8|@]|9|@]|C|$]]|$1|M|3|N|5|H|7|1C|8|@]|9|@]|C|$I|J]]|$1|O|3|P|5|6|7|1D|8|@]|9|@$A|1E|B|1F|1|1G]]|C|$]]|$1|Q|3|R|5|6|7|1H|8|@]|9|@$A|1I|B|1J|1|1K]]|C|$]]|$1|S|3|T|5|6|7|1L|8|@]|9|@]|C|$]]|$1|U|3|-4|5|6|7|1M|8|@]|9|@]|C|$]]]|V|$W|$5|X|Y|Z|C|$10|11]]|12|$5|X|Y|Z|C|$10|13]]|14|$5|X|Y|Z|C|$10|11]]]]

<a href="http://www.lesnikowski.com/mail/" rel="noreferrer">Mail.dll email component</a> includes email template engine:

Here's the syntax overview:

<pre><code>&lt;html&gt;
&lt;body&gt;
Hi {FirstName} {LastName},

Here are your orders: 
{foreach Orders}
 Order '{Name}' sent to &lt;strong&gt;{Street}&lt;/strong&gt;. 
{end}

&lt;/body&gt;
&lt;/html&gt;
</code></pre>

And the code that loads the template, fills data from c# object and sends an email:

<pre><code>Mail.Html(Template
 .FromFile("template.txt")
 .DataFrom(_contact)
 .Render())
 .Text("This is text version of the message.")
 .From(new MailBox("alice@mail.com", "Alice"))
 .To(new MailBox("bob@mail.com", "Bob"))
 .Subject("Your order")
 .UsingNewSmtp()
 .WithCredentials("alice@mail.com", "password")
 .Server("mail.com")
 .WithSSL()
 .Send();
</code></pre>

You can get more info on <a href="http://www.lesnikowski.com/blog/index.php/email-template-engine/" rel="noreferrer">email template engine</a> blog post.

Or just download <a href="http://www.lesnikowski.com/mail/" rel="noreferrer">Mail.dll email component</a> and give it a try.

Please note that this is a commercial product I've created.

blocks|key|348729|text|这里已经有了大量的答案，但我偶然发现了一篇关于如何将Razor与电子邮件模板结合使用的很好的文章。Razor是使用MVC+MVC3推送的，但ASP.NET不需要使用Razor。这是一个非常巧妙的处理电子邮件模板的过程|type|unstyled|depth|inlineStyleRanges|entityRanges|data|348730|正如这篇文章所指出的，“Razor最好的地方在于它不像它的前身(Webforms)那样与web环境捆绑在一起，我们可以很容易地将它托管在web之外，并将其用作各种用途的模板引擎。”|348731|Generating+HTML+emails+with+RazorEngine+-+Part+01+-+Introduction|offset|length|348732|Leveraging+Razor+Templates+Outside+of+ASP.NET:+They’re+Not+Just+for+HTML+Anymore!|348733|Smarter+email+templates+in+ASP.NET+with+RazorEngine|348734|类似堆栈溢出QA|style|BOLD|348735|Templating+using+new+RazorEngine+API|348736|Using+Razor+without+MVC|348737|Is+it+possible+to+use+Razor+View+Engine+outside+asp.net|348738|entityMap|0|LINK|mutability|MUTABLE|url|http://mehdi.me/generating-html-emails-with-razorengine-introduction/|1|http://www.codemag.com/Article/1103081|2|http://blog.falafel.com/smarter-email-templates-in-asp-net-with-razorengine/|3|https://stackoverflow.com/q/28606132/92166|4|https://stackoverflow.com/questions/4808348/using-razor-without-mvc|5|https://stackoverflow.com/questions/3628895/is-it-possible-to-use-razor-view-engine-outside-asp-net^0|0|0|0|1S|0|0|0|29|1|0|0|1F|2|0|0|8|0|0|10|3|0|0|N|4|0|0|1J|5|0^^$0|@$1|2|3|4|5|6|7|1D|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1E|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|1F|8|@]|9|@$F|1G|G|1H|1|1I]]|A|$]]|$1|H|3|I|5|6|7|1J|8|@]|9|@$F|1K|G|1L|1|1M]]|A|$]]|$1|J|3|K|5|6|7|1N|8|@]|9|@$F|1O|G|1P|1|1Q]]|A|$]]|$1|L|3|M|5|6|7|1R|8|@$F|1S|G|1T|N|O]]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1U|8|@]|9|@$F|1V|G|1W|1|1X]]|A|$]]|$1|R|3|S|5|6|7|1Y|8|@]|9|@$F|1Z|G|20|1|21]]|A|$]]|$1|T|3|U|5|6|7|22|8|@]|9|@$F|23|G|24|1|25]]|A|$]]|$1|V|3|-4|5|6|7|26|8|@]|9|@]|A|$]]]|W|$X|$5|Y|Z|10|A|$11|12]]|13|$5|Y|Z|10|A|$11|14]]|15|$5|Y|Z|10|A|$11|16]]|17|$5|Y|Z|10|A|$11|18]]|19|$5|Y|Z|10|A|$11|1A]]|1B|$5|Y|Z|10|A|$11|1C]]]]

There's a ton of answers already here, but I stumbled upon a great article about how to use Razor with email templating. Razor was pushed with ASP.NET MVC 3, but MVC is not required to use Razor. This is pretty slick processing of doing email templates

As the article identifies, "The best thing of Razor is that unlike its predecessor(webforms) it is not tied with the web environment, we can easily host it outside the web and use it as template engine for various purpose. "

<a href="http://mehdi.me/generating-html-emails-with-razorengine-introduction/" rel="noreferrer">Generating HTML emails with RazorEngine - Part 01 - Introduction</a>

<a href="http://www.codemag.com/Article/1103081" rel="noreferrer">Leveraging Razor Templates Outside of ASP.NET: They’re Not Just for HTML Anymore!</a>

<a href="http://blog.falafel.com/smarter-email-templates-in-asp-net-with-razorengine/" rel="noreferrer">Smarter email templates in ASP.NET with RazorEngine</a>

Similar Stackoverflow QA

<a href="https://stackoverflow.com/q/28606132/92166">Templating using new RazorEngine API</a>

<a href="https://stackoverflow.com/questions/4808348/using-razor-without-mvc">Using Razor without MVC</a>

<a href="https://stackoverflow.com/questions/3628895/is-it-possible-to-use-razor-view-engine-outside-asp-net">Is it possible to use Razor View Engine outside asp.net</a>

blocks|key|346497|text|我认为最简单的答案是MvcMailer。它是一个NuGet包，允许您使用自己喜欢的视图引擎生成电子邮件。请参阅NuGet软件包here和project+documentation|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|346498|希望它能帮上忙！|346499|entityMap|0|LINK|mutability|MUTABLE|url|http://nuget.org/Packages/Search?packageType=Packages&searchCategory=All%2BCategories&searchTerm=mvcmailer|1|https://github.com/smsohan/MvcMailer/wiki/MvcMailer-Step-by-Step-Guide^0|1R|4|0|1W|L|1|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]|$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|X|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]|N|$5|I|J|K|C|$L|O]]]]

I think the easy answer is MvcMailer. It s NuGet package that lets you use your favorite view engine to generate emails. See the NuGet package <a href="http://nuget.org/Packages/Search?packageType=Packages&amp;searchCategory=All+Categories&amp;searchTerm=mvcmailer" rel="nofollow">here</a> and the <a href="https://github.com/smsohan/MvcMailer/wiki/MvcMailer-Step-by-Step-Guide" rel="nofollow">project documentation</a>

Hope it helps!

blocks|key|3125669|text|下面是使用WebClient类的简单方法：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|3125670|public+static+string+GetHTMLBody(string+url)
{
++++string+htmlBody;

++++using+(WebClient+client+=+new+WebClient+())
++++{
++++++++htmlBody+=+client.DownloadString(url);
++++}

++++return+htmlBody;
}|code-block|syntax|javascript|3125671|然后就这样叫它：|3125672|string+url+=+"http://www.yourwebsite.com";
message.Body+=+GetHTMLBody(url);|3125673|当然，您的CSS需要内联，以便在大多数电子邮件客户端(如Outlook)中显示网页的样式。如果您的电子邮件显示动态内容(例如客户姓名)，那么我建议您在您的网站上使用QueryStrings来填充数据。(例如http://www.yourwebsite.com?CustomerName=Bob)|3125674|entityMap|0|LINK|mutability|MUTABLE|url|http://www.yourwebsite.com/?CustomerName=Bob^0|5|9|0|0|0|0|2V|17|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|14|8|@]|D|@$9|15|A|16|1|17]]|E|$]]|$1|Q|3|-4|5|6|7|18|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]]]

Here is a simple way using the WebClient class:

<pre><code>public static string GetHTMLBody(string url)
{
 string htmlBody;

 using (WebClient client = new WebClient ())
 {
 htmlBody = client.DownloadString(url);
 }

 return htmlBody;
}
</code></pre>

Then just call it like this:

<pre><code>string url = "http://www.yourwebsite.com";
message.Body = GetHTMLBody(url);
</code></pre>

Of course, your CSS will need to be in-lined in order to show the styles of the webpage in the most email clients (such as Outlook). If your e-mail displays dynamic content (ex. Customer Name), then I would recommend using QueryStrings on your website to populate the data. (ex. <a href="http://www.yourwebsite.com?CustomerName=Bob" rel="nofollow">http://www.yourwebsite.com?CustomerName=Bob</a>)

blocks|key|348764|text|DotLiquid是另一种选择。您将来自类模型的值指定为{{+user.name+}}，然后在运行时提供该类中的数据和带有标记的模板，它将为您合并中的值。它在很多方面类似于使用Razor模板引擎。它支持更复杂的东西，如循环和各种函数，如ToUpper。好处是它们是“安全”，这样创建模板的用户就不会像您在razor中那样使系统崩溃或编写不安全的代码：http://dotliquidmarkup.org/try-online|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|348765|entityMap|0|LINK|mutability|MUTABLE|url|http://dotliquidmarkup.org/try-online^0|S|F|4V|11|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@$9|Q|A|R|1|S]]|E|$]]|$1|F|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

DotLiquid is another option. You specify values from a class model as <code>{{ user.name }}</code> and then at runtime you provide the data in that class, and the template with the markup, and it will merge the values in for you. It is similar to using the Razor templating engine in many ways. It supports more complex things like loops and various function like ToUpper. The nice thing is these are "safe" so that user's who create the templates can't crash your system or write unsafe code like you would in razor: <a href="http://dotliquidmarkup.org/try-online" rel="nofollow">http://dotliquidmarkup.org/try-online</a>

blocks|key|3338647|text|@bardev提供了一个很好的解决方案，但不幸的是，它并不是在所有情况下都很理想。我的就是其中之一。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3338648|我在VS2013的一个网站中使用了WebForms+(我发誓我再也不会使用任何网站了--真糟糕)。|3338649|我尝试了Razor的建议，但我是一个网站，我没有得到集成开发环境在MVC项目中提供的所有重要的IntelliSense。我还喜欢将设计器用于我的模板--这是UserControl的完美位置。|3338650|尼克斯又上剃刀了。|3338651|所以我想出了这个小框架(对于UserControl，向@mun致敬；对于强类型，向@imatoria致敬)。我能看到的唯一一个潜在的问题是，你必须小心地保持你的.ASCX文件名与它的类名同步。如果你走错了路，你会得到一个运行时错误。|3338652|在我的测试中，至少RenderControl()调用不喜欢页面控件，所以我选择了UserControl。|3338653|我非常确定我已经包含了这里的所有内容；如果遗漏了什么，请告诉我。|3338654|HTH|3338655|用法：|3338656|Partial+Class+Purchase
++Inherits+UserControl

++Private+Sub+SendReceipt()
++++Dim+oTemplate+As+MailTemplates.PurchaseReceipt

++++oTemplate+=+MailTemplates.Templates.PurchaseReceipt(Me)
++++oTemplate.Name+=+"James+Bond"
++++oTemplate.OrderTotal+=+3500000
++++oTemplate.OrderDescription+=+"Q-Stuff"
++++oTemplate.InjectCss("PurchaseReceipt")

++++Utils.SendMail("{0}+<james.bond@mi6.co.uk>".ToFormat(oTemplate.Name),+"Purchase+Receipt",+oTemplate.ToHtml)
++End+Sub
End+Class|code-block|syntax|javascript|3338657|基类：|3338658|Namespace+MailTemplates
++Public+MustInherit+Class+BaseTemplate
++++Inherits+UserControl

++++Public+Shared+Function+GetTemplate(Caller+As+TemplateControl,+Template+As+Type)+As+BaseTemplate
++++++Return+Caller.LoadControl("~/MailTemplates/{0}.ascx".ToFormat(Template.Name))
++++End+Function



++++Public+Sub+InjectCss(FileName+As+String)
++++++If+Me.Styler+IsNot+Nothing+Then
++++++++Me.Styler.Controls.Add(New+Controls.Styler(FileName))
++++++End+If
++++End+Sub



++++Private+ReadOnly+Property+Styler+As+PlaceHolder
++++++Get
++++++++If+_Styler+Is+Nothing+Then
++++++++++_Styler+=+Me.FindNestedControl(GetType(PlaceHolder))
++++++++End+If

++++++++Return+_Styler
++++++End+Get
++++End+Property
++++Private+_Styler+As+PlaceHolder
++End+Class
End+Namespace|3338659|"Factory“类：|3338660|Namespace+MailTemplates
++Public+Class+Templates
++++Public+Shared+ReadOnly+Property+PurchaseReceipt(Caller+As+TemplateControl)+As+PurchaseReceipt
++++++Get
++++++++Return+BaseTemplate.GetTemplate(Caller,+GetType(PurchaseReceipt))
++++++End+Get
++++End+Property
++End+Class
End+Namespace|3338661|模板类：|3338662|Namespace+MailTemplates
++Public+MustInherit+Class+PurchaseReceipt
++++Inherits+BaseTemplate

++++Public+MustOverride+WriteOnly+Property+Name+As+String
++++Public+MustOverride+WriteOnly+Property+OrderTotal+As+Decimal
++++Public+MustOverride+WriteOnly+Property+OrderDescription+As+String
++End+Class
End+Namespace|3338663|ASCX标题：|3338664|<%25@+Control+Language="VB"+ClassName="_Header"+%25>

<!DOCTYPE+html+PUBLIC+"-//W3C//DTD+XHTML+1.0+Transitional+//EN"+"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">



<html+xmlns="http://www.w3.org/1999/xhtml">
<head>
++<title></title>
++<asp:PlaceHolder+ID="plcStyler"+runat="server"></asp:PlaceHolder>
</head>
<body>|3338665|ASCX页脚：|3338666|<%25@+Control+Language="VB"+ClassName="_Footer"+%25>

</body>
</html>|3338667|ASCX模板：|3338668|<%25@+Control+Language="VB"+AutoEventWireup="false"+CodeFile="PurchaseReceipt.ascx.vb"+Inherits="PurchaseReceipt"+%25>

<%25@+Register+Src="_Header.ascx"+TagName="Header"+TagPrefix="uc"+%25>
<%25@+Register+Src="_Footer.ascx"+TagName="Footer"+TagPrefix="uc"+%25>

<uc:Header+ID="ctlHeader"+runat="server"+/>

++Name:+<asp:Label+ID="lblName"+runat="server"></asp:Label>
++Order+Total:+<asp:Label+ID="lblOrderTotal"+runat="server"></asp:Label>
++Order+Description:+<asp:Label+ID="lblOrderDescription"+runat="server"></asp:Label>

<uc:Footer+ID="ctlFooter"+runat="server"+/>|3338669|ASCX模板CodeFile：|3338670|Partial+Class+PurchaseReceipt
++Inherits+MailTemplates.PurchaseReceipt

++Public+Overrides+WriteOnly+Property+Name+As+String
++++Set(Value+As+String)
++++++lblName.Text+=+Value
++++End+Set
++End+Property



++Public+Overrides+WriteOnly+Property+OrderTotal+As+Decimal
++++Set(Value+As+Boolean)
++++++lblOrderTotal.Text+=+Value
++++End+Set
++End+Property



++Public+Overrides+WriteOnly+Property+OrderDescription+As+Decimal
++++Set(Value+As+Boolean)
++++++lblOrderDescription.Text+=+Value
++++End+Set
++End+Property
End+Class|3338671|帮助者：|3338672|'
'+FindNestedControl+helpers+based+on+tip+by+@andleer
'+at+http://stackoverflow.com/questions/619449/
'

Public+Module+Helpers
++<Extension>
++Public+Function+AllControls(Control+As+Control)+As+List(Of+Control)
++++Return+Control.Controls.Flatten
++End+Function



++<Extension>
++Public+Function+FindNestedControl(Control+As+Control,+Id+As+String)+As+Control
++++Return+Control.Controls.Flatten(Function(C)+C.ID+=+Id).SingleOrDefault
++End+Function



++<Extension>
++Public+Function+FindNestedControl(Control+As+Control,+Type+As+Type)+As+Control
++++Return+Control.Controls.Flatten(Function(C)+C.GetType+=+Type).SingleOrDefault
++End+Function



++<Extension>
++Public+Function+Flatten(Controls+As+ControlCollection)+As+List(Of+Control)
++++Flatten+=+New+List(Of+Control)

++++Controls.Traverse(Sub(Control)+Flatten.Add(Control))
++End+Function


++<Extension>
++Public+Function+Flatten(Controls+As+ControlCollection,+Predicate+As+Func(Of+Control,+Boolean))+As+List(Of+Control)
++++Flatten+=+New+List(Of+Control)

++++Controls.Traverse(Sub(Control)
++++++++++++++++++++++++If+Predicate(Control)+Then
++++++++++++++++++++++++++Flatten.Add(Control)
++++++++++++++++++++++++End+If
++++++++++++++++++++++End+Sub)
++End+Function



++<Extension>
++Public+Sub+Traverse(Controls+As+ControlCollection,+Action+As+Action(Of+Control))
++++Controls.Cast(Of+Control).ToList.ForEach(Sub(Control+As+Control)
+++++++++++++++++++++++++++++++++++++++++++++++Action(Control)

+++++++++++++++++++++++++++++++++++++++++++++++If+Control.HasControls+Then
+++++++++++++++++++++++++++++++++++++++++++++++++Control.Controls.Traverse(Action)
+++++++++++++++++++++++++++++++++++++++++++++++End+If
+++++++++++++++++++++++++++++++++++++++++++++End+Sub)
++End+Sub



++<Extension()>
++Public+Function+ToFormat(Template+As+String,+ParamArray+Values+As+Object())+As+String
++++Return+String.Format(Template,+Values)
++End+Function



++<Extension()>
++Public+Function+ToHtml(Control+As+Control)+As+String
++++Dim+oSb+As+StringBuilder

++++oSb+=+New+StringBuilder

++++Using+oSw+As+New+StringWriter(oSb)
++++++Using+oTw+As+New+HtmlTextWriter(oSw)
++++++++Control.RenderControl(oTw)
++++++++Return+oSb.ToString
++++++End+Using
++++End+Using
++End+Function
End+Module



Namespace+Controls
++Public+Class+Styler
++++Inherits+LiteralControl

++++Public+Sub+New(FileName+As+String)
++++++Dim+_
++++++++sFileName,
++++++++sFilePath+As+String

++++++sFileName+=+Path.GetFileNameWithoutExtension(FileName)
++++++sFilePath+=+HttpContext.Current.Server.MapPath("~/Styles/{0}.css".ToFormat(sFileName))

++++++If+File.Exists(sFilePath)+Then
++++++++Me.Text+=+"{0}<style+type=""text/css"">{0}{1}</style>{0}".ToFormat(vbCrLf,+File.ReadAllText(sFilePath))
++++++Else
++++++++Me.Text+=+String.Empty
++++++End+If
++++End+Sub
++End+Class
End+Namespace



Public+Class+Utils
++Public+Shared+Sub+SendMail(Recipient+As+MailAddress,+Subject+As+String,+HtmlBody+As+String)
++++Using+oMessage+As+New+MailMessage
++++++oMessage.To.Add(Recipient)
++++++oMessage.IsBodyHtml+=+True
++++++oMessage.Subject+=+Subject.Trim
++++++oMessage.Body+=+HtmlBody.Trim

++++++Using+oClient+As+New+SmtpClient
++++++++oClient.Send(oMessage)
++++++End+Using
++++End+Using
++End+Sub
End+Class|3338673|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1V|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|1W|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|1X|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|1Y|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|1Z|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|20|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|21|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|22|8|@]|9|@]|A|$]]|$1|R|3|S|5|T|7|23|8|@]|9|@]|A|$U|V]]|$1|W|3|X|5|6|7|24|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|T|7|25|8|@]|9|@]|A|$U|V]]|$1|10|3|11|5|6|7|26|8|@]|9|@]|A|$]]|$1|12|3|13|5|T|7|27|8|@]|9|@]|A|$U|V]]|$1|14|3|15|5|6|7|28|8|@]|9|@]|A|$]]|$1|16|3|17|5|T|7|29|8|@]|9|@]|A|$U|V]]|$1|18|3|19|5|6|7|2A|8|@]|9|@]|A|$]]|$1|1A|3|1B|5|T|7|2B|8|@]|9|@]|A|$U|V]]|$1|1C|3|1D|5|6|7|2C|8|@]|9|@]|A|$]]|$1|1E|3|1F|5|T|7|2D|8|@]|9|@]|A|$U|V]]|$1|1G|3|1H|5|6|7|2E|8|@]|9|@]|A|$]]|$1|1I|3|1J|5|T|7|2F|8|@]|9|@]|A|$U|V]]|$1|1K|3|1L|5|6|7|2G|8|@]|9|@]|A|$]]|$1|1M|3|1N|5|T|7|2H|8|@]|9|@]|A|$U|V]]|$1|1O|3|1P|5|6|7|2I|8|@]|9|@]|A|$]]|$1|1Q|3|1R|5|T|7|2J|8|@]|9|@]|A|$U|V]]|$1|1S|3|-4|5|6|7|2K|8|@]|9|@]|A|$]]]|1T|$]]

@bardev provides a good solution, but unfortunately it's not ideal in all cases. Mine was one of them.

I'm using WebForms in a Website (I swear I'll never use a Website again--what a PITA) in VS 2013.

I tried the Razor suggestion, but mine being a Website I didn't get the all-important IntelliSense that the IDE delivers in an MVC project. I also like to use the designer for my templates--a perfect spot for a UserControl.

Nix on Razor again.

So I came up with this little framework instead (hat tips to @mun for UserControl and @imatoria for Strong Typing). Just about the only potential trouble spot I can see is that you have to be careful to keep your .ASCX filename in sync with its class name. If you stray, you'll get a runtime error.

FWIW: In my testing at least the RenderControl() call doesn't like a Page control, so I went with UserControl.

I'm pretty sure I've included everything here; let me know if I left something out.

HTH

Usage:

<pre><code>Partial Class Purchase
 Inherits UserControl

 Private Sub SendReceipt()
 Dim oTemplate As MailTemplates.PurchaseReceipt

 oTemplate = MailTemplates.Templates.PurchaseReceipt(Me)
 oTemplate.Name = "James Bond"
 oTemplate.OrderTotal = 3500000
 oTemplate.OrderDescription = "Q-Stuff"
 oTemplate.InjectCss("PurchaseReceipt")

 Utils.SendMail("{0} &lt;james.bond@mi6.co.uk&gt;".ToFormat(oTemplate.Name), "Purchase Receipt", oTemplate.ToHtml)
 End Sub
End Class
</code></pre>

Base Class:

<pre><code>Namespace MailTemplates
 Public MustInherit Class BaseTemplate
 Inherits UserControl

 Public Shared Function GetTemplate(Caller As TemplateControl, Template As Type) As BaseTemplate
 Return Caller.LoadControl("~/MailTemplates/{0}.ascx".ToFormat(Template.Name))
 End Function



 Public Sub InjectCss(FileName As String)
 If Me.Styler IsNot Nothing Then
 Me.Styler.Controls.Add(New Controls.Styler(FileName))
 End If
 End Sub



 Private ReadOnly Property Styler As PlaceHolder
 Get
 If _Styler Is Nothing Then
 _Styler = Me.FindNestedControl(GetType(PlaceHolder))
 End If

 Return _Styler
 End Get
 End Property
 Private _Styler As PlaceHolder
 End Class
End Namespace
</code></pre>

"Factory" Class:

<pre><code>Namespace MailTemplates
 Public Class Templates
 Public Shared ReadOnly Property PurchaseReceipt(Caller As TemplateControl) As PurchaseReceipt
 Get
 Return BaseTemplate.GetTemplate(Caller, GetType(PurchaseReceipt))
 End Get
 End Property
 End Class
End Namespace
</code></pre>

Template Class:

<pre><code>Namespace MailTemplates
 Public MustInherit Class PurchaseReceipt
 Inherits BaseTemplate

 Public MustOverride WriteOnly Property Name As String
 Public MustOverride WriteOnly Property OrderTotal As Decimal
 Public MustOverride WriteOnly Property OrderDescription As String
 End Class
End Namespace
</code></pre>

ASCX Header:

<pre><code>&lt;%@ Control Language="VB" ClassName="_Header" %&gt;

&lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional //EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt;

&lt;!--
 See https://www.campaignmonitor.com/blog/post/3317/ for discussion of DocType in HTML Email
--&gt;

&lt;html xmlns="http://www.w3.org/1999/xhtml"&gt;
&lt;head&gt;
 &lt;title&gt;&lt;/title&gt;
 &lt;asp:PlaceHolder ID="plcStyler" runat="server"&gt;&lt;/asp:PlaceHolder&gt;
&lt;/head&gt;
&lt;body&gt;
</code></pre>

ASCX Footer:

<pre><code>&lt;%@ Control Language="VB" ClassName="_Footer" %&gt;

&lt;/body&gt;
&lt;/html&gt;
</code></pre>

ASCX Template:

<pre><code>&lt;%@ Control Language="VB" AutoEventWireup="false" CodeFile="PurchaseReceipt.ascx.vb" Inherits="PurchaseReceipt" %&gt;

&lt;%@ Register Src="_Header.ascx" TagName="Header" TagPrefix="uc" %&gt;
&lt;%@ Register Src="_Footer.ascx" TagName="Footer" TagPrefix="uc" %&gt;

&lt;uc:Header ID="ctlHeader" runat="server" /&gt;

 &lt;p&gt;Name: &lt;asp:Label ID="lblName" runat="server"&gt;&lt;/asp:Label&gt;&lt;/p&gt;
 &lt;p&gt;Order Total: &lt;asp:Label ID="lblOrderTotal" runat="server"&gt;&lt;/asp:Label&gt;&lt;/p&gt;
 &lt;p&gt;Order Description: &lt;asp:Label ID="lblOrderDescription" runat="server"&gt;&lt;/asp:Label&gt;&lt;/p&gt;

&lt;uc:Footer ID="ctlFooter" runat="server" /&gt;
</code></pre>

ASCX Template CodeFile:

<pre><code>Partial Class PurchaseReceipt
 Inherits MailTemplates.PurchaseReceipt

 Public Overrides WriteOnly Property Name As String
 Set(Value As String)
 lblName.Text = Value
 End Set
 End Property



 Public Overrides WriteOnly Property OrderTotal As Decimal
 Set(Value As Boolean)
 lblOrderTotal.Text = Value
 End Set
 End Property



 Public Overrides WriteOnly Property OrderDescription As Decimal
 Set(Value As Boolean)
 lblOrderDescription.Text = Value
 End Set
 End Property
End Class
</code></pre>

Helpers:

<pre><code>'
' FindNestedControl helpers based on tip by @andleer
' at http://stackoverflow.com/questions/619449/
'

Public Module Helpers
 &lt;Extension&gt;
 Public Function AllControls(Control As Control) As List(Of Control)
 Return Control.Controls.Flatten
 End Function



 &lt;Extension&gt;
 Public Function FindNestedControl(Control As Control, Id As String) As Control
 Return Control.Controls.Flatten(Function(C) C.ID = Id).SingleOrDefault
 End Function



 &lt;Extension&gt;
 Public Function FindNestedControl(Control As Control, Type As Type) As Control
 Return Control.Controls.Flatten(Function(C) C.GetType = Type).SingleOrDefault
 End Function



 &lt;Extension&gt;
 Public Function Flatten(Controls As ControlCollection) As List(Of Control)
 Flatten = New List(Of Control)

 Controls.Traverse(Sub(Control) Flatten.Add(Control))
 End Function


 &lt;Extension&gt;
 Public Function Flatten(Controls As ControlCollection, Predicate As Func(Of Control, Boolean)) As List(Of Control)
 Flatten = New List(Of Control)

 Controls.Traverse(Sub(Control)
 If Predicate(Control) Then
 Flatten.Add(Control)
 End If
 End Sub)
 End Function



 &lt;Extension&gt;
 Public Sub Traverse(Controls As ControlCollection, Action As Action(Of Control))
 Controls.Cast(Of Control).ToList.ForEach(Sub(Control As Control)
 Action(Control)

 If Control.HasControls Then
 Control.Controls.Traverse(Action)
 End If
 End Sub)
 End Sub



 &lt;Extension()&gt;
 Public Function ToFormat(Template As String, ParamArray Values As Object()) As String
 Return String.Format(Template, Values)
 End Function



 &lt;Extension()&gt;
 Public Function ToHtml(Control As Control) As String
 Dim oSb As StringBuilder

 oSb = New StringBuilder

 Using oSw As New StringWriter(oSb)
 Using oTw As New HtmlTextWriter(oSw)
 Control.RenderControl(oTw)
 Return oSb.ToString
 End Using
 End Using
 End Function
End Module



Namespace Controls
 Public Class Styler
 Inherits LiteralControl

 Public Sub New(FileName As String)
 Dim _
 sFileName,
 sFilePath As String

 sFileName = Path.GetFileNameWithoutExtension(FileName)
 sFilePath = HttpContext.Current.Server.MapPath("~/Styles/{0}.css".ToFormat(sFileName))

 If File.Exists(sFilePath) Then
 Me.Text = "{0}&lt;style type=""text/css""&gt;{0}{1}&lt;/style&gt;{0}".ToFormat(vbCrLf, File.ReadAllText(sFilePath))
 Else
 Me.Text = String.Empty
 End If
 End Sub
 End Class
End Namespace



Public Class Utils
 Public Shared Sub SendMail(Recipient As MailAddress, Subject As String, HtmlBody As String)
 Using oMessage As New MailMessage
 oMessage.To.Add(Recipient)
 oMessage.IsBodyHtml = True
 oMessage.Subject = Subject.Trim
 oMessage.Body = HtmlBody.Trim

 Using oClient As New SmtpClient
 oClient.Send(oMessage)
 End Using
 End Using
 End Sub
End Class
</code></pre>

blocks|key|348004|text|只是将我正在使用的库放入其中：https://github.com/lukencode/FluentEmail|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|348005|它使用RazorLight呈现电子邮件，使用流畅的样式构建电子邮件，并支持开箱即用的多个发件人。它还附带了ASP.NET+DI的扩展方法。简单易用，少安装，支持纯文本和HTML。|348006|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/lukencode/FluentEmail|1|https://github.com/toddams/RazorLight^0|F|14|0|0|3|A|1|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@$A|U|B|V|1|W]]|C|$]]|$1|F|3|-4|5|6|7|X|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]|N|$5|I|J|K|C|$L|O]]]]

Just throwing the library I'm using into the mix: <a href="https://github.com/lukencode/FluentEmail" rel="nofollow noreferrer">https://github.com/lukencode/FluentEmail</a>

It renders emails using <a href="https://github.com/toddams/RazorLight" rel="nofollow noreferrer">RazorLight</a>, uses the fluent style to build emails, and supports multiple senders out of the box. It comes with extension methods for ASP.NET DI too. Simple to use, little setup, with plain text and HTML support.

I'm working on a site that will send out a significant number of emails. I want to set up both header and footer text, or maybe even templates to allow the users to easily edit these emails if they need to.

If I embed the HTML inside C# string literals, it's ugly and they would have to worry about escaping. Including flat files for the header and footer might work, but something about it just doesn't feel right.

What would be ideal what be to use a <code>.ASPX</code> page as a template somehow, then just tell my code to serve that page, and use the HTML returned for the email.

Is there a nice and easy way to do this? Is there a better way to go about solving this problem?

Updated: 
I added an answer that enables you to use a standard .aspx page as the email template. Just replace all the variables like you normally would, use databinding, etc. Then just capture the output of the page, and voila! You have your HTML email!

UPDATED WITH CAVEAT!!!: 
I was using the MailDefinition class on some aspx pages just fine, but when trying to use this class during a server process that was running, it failed. I believe it was because the MailDefinition.CreateMailMessage() method requires a valid control to reference, even though it doesn't always do something. Because of this, I would recommend my approach using an aspx page, or Mun's approach using an ascx page, which seems a little better.

Can I set up HTML/Email Templates with ASP.NET?

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我在一个网站上工作，将发出大量的电子邮件。我想同时设置页眉和页脚文本，或者甚至模板，以允许用户轻松编辑这些电子邮件，如果他们需要。如果我把超文本标记语言嵌入到C#字符串字面量中，那就很难看了，他们会担心转义的问题。在页眉和页脚中包含平面文件可能会起作用，但其中的某些内容感觉不太对劲。最好是以某种方式使用.ASPX页面作...

问我能用ASP.NET设置超文本标记语言/电子邮件模板吗？
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