blocks|key|3116202|text|Javascript变量存在于客户机上，因此为了将这些值放入服务器，您需要执行来自客户机的请求。您可能需要一种称为AJAX的方法。AJAX涉及到Javascript在页面后台向服务器发出请求。您将设置一个等待这些后台请求的C#网页。如果使用GET请求，那么将变量放在对新C#页面的AJAX请求的查询字符串中。如果要使用POST请求，则需要在post到页面的数据中设置参数。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3116203|像jQuery这样的库使得这类事情变得非常简单。|offset|length|3116204|entityMap|0|LINK|mutability|MUTABLE|url|http://api.jquery.com/category/ajax/^0|0|1|6|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]]]]

Javascript variables exist on the client so in order to get those values into the server you'll need to execute a request from the client. You probably want an approach called AJAX. AJAX involves Javascript making requests to the server in the background of your page. You'll set up a C# web page that expects these background requests. If you use a GET request then then place the variables in the query string of your AJAX request to your new C# page. If you want to use a POST request then you'll set parameters in the data that you post to your page.

Libraries like <a href="http://api.jquery.com/category/ajax/" rel="nofollow">jQuery</a> make this kind of thing pretty simple.

blocks|key|3116261|text|没有直接的方法可以从服务器端代码访问客户端代码中的变量。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3116262|一种无需编写处理程序、ajax帖子等的简单方法就是简单地将java脚本变量存储在一个隐藏的文本框中，并在帖子中检索它。您也可以写回隐藏字段并将值提供给您的脚本，例如|3116263|标记|offset|length|style|BOLD|3116264|<asp:HiddenField+runat="server"+Id="JavascriptValue"+value="0">|code-block|syntax|javascript|3116265|脚本|3116266|<script>
+++var+myValue+=+<%25=JavascriptValue.Value%25>
</script>|3116267|服务器端|3116268|protected+void+Page_Load(object+sender,+EventArgs+e)
{
string+val+=+JavascriptValue.Value;
}|3116269|entityMap^0|0|0|0|2|0|0|0|2|0|0|0|4|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|10|8|@$F|11|G|12|H|I]]|9|@]|A|$]]|$1|J|3|K|5|L|7|13|8|@]|9|@]|A|$M|N]]|$1|O|3|P|5|6|7|14|8|@$F|15|G|16|H|I]]|9|@]|A|$]]|$1|Q|3|R|5|L|7|17|8|@]|9|@]|A|$M|N]]|$1|S|3|T|5|6|7|18|8|@$F|19|G|1A|H|I]]|9|@]|A|$]]|$1|U|3|V|5|L|7|1B|8|@]|9|@]|A|$M|N]]|$1|W|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]]|X|$]]

There's no direct way to access variables in client-side code from your server-side code. 

An easy way, without writing handlers, ajax posts, etc., to accomplish this is to simply store the java script variable in a hidden text box and retrieve it on your post. You can also write back to the hidden field and feed your script with the value, e.g.

Markup

<pre><code>&lt;asp:HiddenField runat="server" Id="JavascriptValue" value="0"&gt;
</code></pre>

Script

<pre><code>&lt;script&gt;
 var myValue = &lt;%=JavascriptValue.Value%&gt;
&lt;/script&gt;
</code></pre>

Server-Side

<pre><code>protected void Page_Load(object sender, EventArgs e)
{
string val = JavascriptValue.Value;
}
</code></pre>

blocks|key|265302|text|通过JS将值写入控件(例如HiddenField)，并在回发时读取。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|265303|可以从Page_Load上的代码隐藏中注册隐藏字段|265304|if+(this.Request.Form["myHiddenField"]+==+null)+{+
++++ClientScript.RegisterHiddenField("myHiddenField",+"");+}|code-block|syntax|javascript|265305|使用脚本填充它|265306|ClientScript.RegisterOnSubmitStatement(this.GetType(),
+++++MethodBase.GetCurrentMethod().DeclaringType.Name+%2B+"_myHiddenField",
+++++"var+res=document.getElementById('myHiddenField');if(res!=null){res.value='some+value';}");|265307|并在回发上阅读它(也可以是Page_Load)|265308|var+myValue+=+(!IsPostBack)
++++?+null
++++:+this.Request.Form["myHiddenField"];|265309|entityMap^0|D|B|0|3|9|0|0|0|0|D|9|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Z|8|@$9|10|A|11|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|12|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|13|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|14|8|@]|D|@]|E|$K|L]]|$1|Q|3|R|5|6|7|15|8|@$9|16|A|17|B|C]]|D|@]|E|$]]|$1|S|3|T|5|J|7|18|8|@]|D|@]|E|$K|L]]|$1|U|3|-4|5|6|7|19|8|@]|D|@]|E|$]]]|V|$]]

Write the value to a control (e.g. <code>HiddenField</code>) via JS and read that on the postback.

You can register hidden fields from code-behind on the <code>Page_Load</code>

<pre><code>if (this.Request.Form["myHiddenField"] == null) { 
 ClientScript.RegisterHiddenField("myHiddenField", ""); }
</code></pre>

populate it with a script

<pre><code>ClientScript.RegisterOnSubmitStatement(this.GetType(),
 MethodBase.GetCurrentMethod().DeclaringType.Name + "_myHiddenField",
 "var res=document.getElementById('myHiddenField');if(res!=null){res.value='some value';}");
</code></pre>

and read it on postbacks (also <code>Page_Load</code>)

<pre><code>var myValue = (!IsPostBack)
 ? null
 : this.Request.Form["myHiddenField"];
</code></pre>

blocks|key|3116394|text|我所做的是将javaScript变量保存在cookie中，然后从C#中读取它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3116395|JavaScript代码：|3116396|<script>
$(document).ready(function+()+{
+++createCookie("height",+$(window).height(),+"10");
+});

+function+createCookie(name,+value,+days)+{
+++var+expires;
+++if+(days)+{
+++++var+date+=+new+Date();
+++++date.setTime(date.getTime()+%2B+(days+*+24+*+60+*+60+*+1000));
+++++expires+=+";+expires="+%2B+date.toGMTString();
+++}+else+{
+++++expires+=+"";
+++}
+++document.cookie+=+escape(name)+%2B+"="+%2B+escape(value)+%2B+expires+%2B+";+path=/";
++}
</script>++|code-block|syntax|javascript|3116397|C#代码：|3116398|height+of+browser:@Request.Cookies["height"].Value;+++|3116399|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

what I did is save the javaScript variable in a cookie and then read it from C#.

JavaScript Code:

<pre><code>&lt;script&gt;
$(document).ready(function () {
 createCookie("height", $(window).height(), "10");
 });

 function createCookie(name, value, days) {
 var expires;
 if (days) {
 var date = new Date();
 date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
 expires = "; expires=" + date.toGMTString();
 } else {
 expires = "";
 }
 document.cookie = escape(name) + "=" + escape(value) + expires + "; path=/";
 }
&lt;/script&gt; 
</code></pre>

C# Code:

<pre><code>height of browser:@Request.Cookies["height"].Value; 
</code></pre>

Is there a way to assign/pass/copy a javascript variable to a server side variable in C#? For the sake of argument, let's say that I was able to parse some JSON for variables that I want to store and assign them on the client (ie. var = FirstName and var = 25 and var = someDateTime, etc) .

Passing javascript variables to server-side C# logic

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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在C#中，有没有办法将javascript变量赋值/传递/复制到服务器端变量？为了便于讨论，假设我能够解析一些JSON来获取我想要存储的变量，并将它们分配到客户端(即，.var = FirstName，var = 25，var = someDateTime，依此类推)。

问将javascript变量传递给服务器端C#逻辑
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