blocks|key|1337489|text|只要标记不太复杂，像这样发出手工构建的html可能是最好的方式。字符串构建器只有在大约三次连接后才开始在效率方面回报你，所以对于真正简单的东西，字符串%2B字符串就可以了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1337490|除此之外，您可以开始使用html控件(System.Web.UI.HtmlControls)并呈现它们，这样您有时可以继承它们并为复杂的条件布局创建自己的类。|1337491|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|$]]

Emitting handbuilt html like this is probably the best way so long as the markup isn't too complicated. The stringbuilder only starts to pay you back in terms of efficiency after about three concatenations, so for really simple stuff string + string will do.

Other than that you can start to use the html controls (System.Web.UI.HtmlControls) and render them, that way you can sometimes inherit them and make your own clasess for complex conditional layout.

blocks|key|1337637|text|使用System.Web.UI.HtmlTextWriter类。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1337638|StringWriter+writer+=+new+StringWriter();
HtmlTextWriter+html+=+new+HtmlTextWriter(writer);

html.RenderBeginTag(HtmlTextWriterTag.H1);
html.WriteEncodedText("Heading+Here");
html.RenderEndTag();
html.WriteEncodedText(String.Format("Dear+{0}",+userName));
html.WriteBreak();
html.RenderBeginTag(HtmlTextWriterTag.P);
html.WriteEncodedText("First+part+of+the+email+body+goes+here");
html.RenderEndTag();
html.Flush();

string+htmlString+=+writer.ToString();|code-block|syntax|javascript|1337639|对于大量包含样式属性创建的超文本标记语言，HtmlTextWriter可能是最佳选择。然而，它的使用可能有点笨拙，一些开发人员希望标记本身易于阅读，但反常的是，HtmlTextWriter在缩进方面的选择有点奇怪。|1337640|在本例中，您还可以非常有效地使用XmlTextWriter：|1337641|writer+=+new+StringWriter();
XmlTextWriter+xml+=+new+XmlTextWriter(writer);
xml.Formatting+=+Formatting.Indented;
xml.WriteElementString("h1",+"Heading+Here");
xml.WriteString(String.Format("Dear+{0}",+userName));
xml.WriteStartElement("br");
xml.WriteEndElement();
xml.WriteElementString("p",+"First+part+of+the+email+body+goes+here");
xml.Flush();|1337642|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]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|S|8|@]|9|@]|A|$E|F]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Use the System.Web.UI.HtmlTextWriter class.

<pre><code>StringWriter writer = new StringWriter();
HtmlTextWriter html = new HtmlTextWriter(writer);

html.RenderBeginTag(HtmlTextWriterTag.H1);
html.WriteEncodedText("Heading Here");
html.RenderEndTag();
html.WriteEncodedText(String.Format("Dear {0}", userName));
html.WriteBreak();
html.RenderBeginTag(HtmlTextWriterTag.P);
html.WriteEncodedText("First part of the email body goes here");
html.RenderEndTag();
html.Flush();

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

For extensive HTML that includes the creation of style attributes HtmlTextWriter is probably the best way to go. However it can be a bit clunky to use and some developers like the markup itself to be easily read but perversly HtmlTextWriter's choices with regard indentation is a bit wierd.

In this example you can also use XmlTextWriter quite effectively:-

<pre><code>writer = new StringWriter();
XmlTextWriter xml = new XmlTextWriter(writer);
xml.Formatting = Formatting.Indented;
xml.WriteElementString("h1", "Heading Here");
xml.WriteString(String.Format("Dear {0}", userName));
xml.WriteStartElement("br");
xml.WriteEndElement();
xml.WriteElementString("p", "First part of the email body goes here");
xml.Flush();
</code></pre>

blocks|key|1553353|text|您可以使用MailDefinition+class。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1553354|下面是它的使用方法：|1553355|MailDefinition+md+=+new+MailDefinition();
md.From+=+"test@domain.com";
md.IsBodyHtml+=+true;
md.Subject+=+"Test+of+MailDefinition";

ListDictionary+replacements+=+new+ListDictionary();
replacements.Add("{name}",+"Martin");
replacements.Add("{country}",+"Denmark");

string+body+=+"<div>Hello+{name}+You're+from+{country}.</div>";

MailMessage+msg+=+md.CreateMailMessage("you@anywhere.com",+replacements,+body,+new+System.Web.UI.Control());|code-block|syntax|javascript|1553356|此外，我还写了一篇关于如何generate+HTML+e-mail+body+in+C#+using+templates+using+the+MailDefinition+class的博客文章。|1553357|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.maildefinition.aspx|1|http://martinnormark.com/generate-html-e-mail-body-in-c-using-templates^0|5|K|0|0|0|0|D|26|1|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|6|7|10|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|11|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|9|@$A|13|B|14|1|15]]|C|$]]|$1|M|3|-4|5|6|7|16|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]|U|$5|P|Q|R|C|$S|V]]]]

You can use the <a href="http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.maildefinition.aspx" rel="noreferrer">MailDefinition class</a>.

This is how you use it:

<pre><code>MailDefinition md = new MailDefinition();
md.From = "test@domain.com";
md.IsBodyHtml = true;
md.Subject = "Test of MailDefinition";

ListDictionary replacements = new ListDictionary();
replacements.Add("{name}", "Martin");
replacements.Add("{country}", "Denmark");

string body = "&lt;div&gt;Hello {name} You're from {country}.&lt;/div&gt;";

MailMessage msg = md.CreateMailMessage("you@anywhere.com", replacements, body, new System.Web.UI.Control());
</code></pre>

Also, I've written a blog post on how to <a href="http://martinnormark.com/generate-html-e-mail-body-in-c-using-templates" rel="noreferrer">generate HTML e-mail body in C# using templates using the MailDefinition class</a>.

blocks|key|1337877|text|我建议使用某种类型的模板。有各种不同的方法来实现这一点，但本质上是在某个地方(在磁盘上，在数据库中等)保存电子邮件的模板，并简单地将关键数据(例如:收件人姓名等)插入到模板中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1337878|这要灵活得多，因为这意味着您可以根据需要更改模板，而不必更改代码。在我的经验中，您可能会收到来自最终用户的更改模板的请求。如果你想全力以赴，你可以包括一个模板编辑器。|1337879|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 would recomend using templates of some sort. There are various different ways to approach this but essentially hold a template of the Email some where (on disk, in a database etc) and simply insert the key data (IE: Recipients name etc) into the template.

This is far more flexible because it means you can alter the template as required without having to alter your code. In my experience your likely to get requests for changes to the templates from end users. If you want to go the whole hog you could include a template editor.

blocks|key|1553670|text|您可能想看看目前可用的一些模板框架。其中一些是MVC的副产品，但这并不是必需的。Spark是一个很好的选择。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1553671|entityMap|0|LINK|mutability|MUTABLE|url|http://sparkviewengine.com/^0|14|5|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 might want to have a look at some of the template frameworks that are available at the moment. Some of them are spin offs as a result of MVC but that isn't required. <a href="http://sparkviewengine.com/" rel="nofollow noreferrer">Spark</a> is a good one.

blocks|key|1338023|text|如果你不想依赖于完整的.NET框架，还有一个库可以让你的代码看起来像这样：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1338024|string+userName+=+"John+Doe";

var+mailBody+=+new+HTML+{
++++new+H(1)+{
++++++++"Heading+Here"
++++},
++++new+P+{
++++++++string.Format("Dear+{0},",+userName),
++++++++new+Br()
++++},
++++new+P+{
++++++++"First+part+of+the+email+body+goes+here"
++++}
};

string+htmlString+=+mailBody.Render();|code-block|syntax|javascript|1338025|它是开源的，你可以从http://sourceforge.net/projects/htmlplusplus/下载|offset|length|1338026|免责声明:我是这个库的作者，它是用来解决同样的问题的--从应用程序中发送一封HTML电子邮件。|1338027|entityMap|0|LINK|mutability|MUTABLE|url|http://sourceforge.net/projects/htmlplusplus/^0|0|0|A|19|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@$I|X|J|Y|1|Z]]|A|$]]|$1|K|3|L|5|6|7|10|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

If you don't want a dependency on the full .NET Framework, there's also a library that makes your code look like:

<pre><code>string userName = "John Doe";

var mailBody = new HTML {
 new H(1) {
 "Heading Here"
 },
 new P {
 string.Format("Dear {0},", userName),
 new Br()
 },
 new P {
 "First part of the email body goes here"
 }
};

string htmlString = mailBody.Render();
</code></pre>

It's open source, you can download it from <a href="http://sourceforge.net/projects/htmlplusplus/" rel="nofollow">http://sourceforge.net/projects/htmlplusplus/</a>

Disclaimer: I'm the author of this library, it was written to solve the same issue exactly - send an HTML email from an application.

blocks|key|1553745|text|我使用dotLiquid来完成这个任务。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1553746|它接受一个模板，并用匿名对象的内容填充特殊的标识符。|1553747|//define+template
String+templateSource+=+"<h1>{{Heading}}</h1>Dear+{{UserName}}, First+part+of+the+email+body+goes+here");
Template+bodyTemplate+=+Template.Parse(templateSource);+//+Parses+and+compiles+the+template+source

//Create+DTO+for+the+renderer
var+bodyDto+=+new+{
++++Heading+=+"Heading+Here",
++++UserName+=+userName
};
String+bodyText+=+bodyTemplate.Render(Hash.FromAnonymousObject(bodyDto));|code-block|syntax|javascript|1553748|它也适用于集合，参见some+online+examples。|1553749|entityMap|0|LINK|mutability|MUTABLE|url|http://dotliquidmarkup.org/|1|http://dotliquidmarkup.org/try-online^0|3|9|0|0|0|0|A|K|1|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|6|7|10|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|11|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|9|@$A|13|B|14|1|15]]|C|$]]|$1|M|3|-4|5|6|7|16|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]|U|$5|P|Q|R|C|$S|V]]]]

I use <a href="http://dotliquidmarkup.org/" rel="nofollow">dotLiquid</a> for exactly this task.

It takes a template, and fills special identifiers with the content of an anonymous object.

<pre><code>//define template
String templateSource = "&lt;h1&gt;{{Heading}}&lt;/h1&gt;Dear {{UserName}},&lt;br/&gt;&lt;p&gt;First part of the email body goes here");
Template bodyTemplate = Template.Parse(templateSource); // Parses and compiles the template source

//Create DTO for the renderer
var bodyDto = new {
 Heading = "Heading Here",
 UserName = userName
};
String bodyText = bodyTemplate.Render(Hash.FromAnonymousObject(bodyDto));
</code></pre>

It also works with collections, see <a href="http://dotliquidmarkup.org/try-online" rel="nofollow">some online examples</a>.

blocks|key|1338109|text|我在生产中使用的一个易于维护的商业版本是LimiLabs+Template+Engine，它已经使用了3%2B多年，允许我在不必更新代码(免责声明、链接等)的情况下对文本模板进行更改-它可以像下面这样简单|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1338110|Contact+templateData+=+...;+
string+html+=+Template
+++++.FromFile("template.txt")
+++++.DataFrom(templateData+)
+++++.Render();|code-block|syntax|javascript|1338111|值得一看，就像我做的那样；在尝试了这里提到的各种答案之后。|1338112|entityMap|0|LINK|mutability|MUTABLE|url|https://www.limilabs.com/blog/email-template-engine^0|K|O|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|C|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

A commercial version which I use in production and allows for easy maintenance is <a href="https://www.limilabs.com/blog/email-template-engine" rel="nofollow noreferrer">LimiLabs Template Engine</a>, been using it for 3+ years and allows me to make changes to the text template without having to update code (disclaimers, links etc..) - it could be as simple as
<pre><code>Contact templateData = ...; 
string html = Template
 .FromFile(&quot;template.txt&quot;)
 .DataFrom(templateData )
 .Render();
</code></pre>
Worth taking a look at, like I did; after attempting various answers mentioned here.

Is there a better way to generate HTML email in C# (for sending via System.Net.Mail), than using a Stringbuilder to do the following:

<pre><code>string userName = "John Doe";
StringBuilder mailBody = new StringBuilder();
mailBody.AppendFormat("&lt;h1&gt;Heading Here&lt;/h1&gt;");
mailBody.AppendFormat("Dear {0}," userName);
mailBody.AppendFormat("&lt;br /&gt;");
mailBody.AppendFormat("&lt;p&gt;First part of the email body goes here&lt;/p&gt;");
</code></pre>

and so on, and so forth?

Generating HTML email body in C#

数据库

有没有更好的方法在C#中生成超文本标记语言电子邮件(通过System.Net.Mail发送)，而不是使用Stringbuilder来做以下事情：string userName = "John Doe";StringBuilder mailBody = new StringBuilder();mailBody.Appen...

问在C#中生成HTML电子邮件正文
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