blocks|key|93173|text|是啊，这是个很难的问题。使用MS+Ajax将会对您有所帮助。您需要从服务器推入代码，以便在页面加载时调用此函数，并将返回值分配给一个隐藏字段，服务器可以在回发时访问该字段。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|93174|我必须说这个解决方案很糟糕，但我不知道另一种方法。希望有人能有更好的解决方案。|93175|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|$]]

Yeah, this is a difficult one. Using MS Ajax will help you out a bit. You'll need to push in code from the server to call this function upon page load and assign the return value to a hidden field that can be accessed by the server on post back.

I must say that this solution sucks, but I don't know another way. Hopefully, someone will have a better solution.

blocks|key|4881555|text|在必须调用javascript的地方简单地编写代码|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4881556|Response.Write(“alert('hello');")|4881557|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|$]]

Write simply where you have to call javascript

Response.Write(
" alert('hello');")

blocks|key|4881297|text|我不明白您期望服务器端代码如何调用客户端函数？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4881298|AJAX调用是从客户端到服务器端的调用！|4881299|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 don't see how you expect server-side code to call a client-side function???

AJAX calls are from the client-side to the server-side!

blocks|key|93127|text|我以前使用过一个文本控件来做到这一点，该控件被标记为隐藏，并在更改时自动返回。然后，该函数设置触发回发的控件的文本。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|93128|要从服务器端调用该函数，只需注册一些启动脚本，它将在页面呈现时运行。|93129|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 have done this before by using a text control marked as hidden with autopostback on change. Then, the function sets the text of that control which triggers a postback.

To call the function from the server side, simply register some startup script and it will run when the page renders.

blocks|key|93134|text|如果您打算在服务器端和客户端重用某些函数，我建议您在服务器端(aspx或asmx)编写该函数，然后使用AJAX从客户端(JavaScript)调用它。不确定你是否在找这个。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|93135|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|$]]

If your intention is to reuse some functions in both server side and client side, I would suggest to write that function in server side (aspx or asmx) and call it from client side (JavaScript) using AJAX. Not sure whether you are looking for this.

blocks|key|4881431|text|当您在服务器端和客户端之间进行转换时，就像用户单击了浏览器上的刷新按钮一样。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4881432|这真的是您想要做的吗，因为您提出的方案将意味着至少两次回发。|4881433|这样做的目的是什么？如果你能把这个放在客户端就更好了。|4881434|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Any time you transition between server-side and client-side, it's like the user clicked the refresh button on their browser in terms of performance.

Is that really what you want to do, since your proposed scenario would mean at least two post-backs. 

What is the purpose of this? It would be better if you could keep this at the client.

blocks|key|4881515|text|在第一个回答中，Matt提到这是不可能的(在服务器上执行客户端代码)。这是真的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4881516|你对silverlight的评论并不准确。Silverlight无法从服务器调用客户端代码。Silverlight在客户机上运行，就像JavaScript一样，所以这是一个客户对客户的调用。|4881517|你能澄清一下这个场景吗...我想你是在问这个问题：|4881518|private+void+Page_Load()
{
++++string+someValue+=+EXECUTE_JS_ON_CLIENT_AND_GET_RESULT();

++++//+do+some+stuff+here+while+still+on+the+server...
}|code-block|syntax|javascript|4881519|如果这是你想做的，那是不可能的。在服务器上时，您不能与客户端通信。|4881520|这就是你的意思吗？|4881521|谢谢，-Timothy|4881522|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|U|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|V|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

In the first answer, Matt mentioned that this is not possible (to execute client-side code while still on the server). And that's true.

Your comment about silverlight is not really accurate. Silverlight can't call client-side code from the server. Silverlight runs on the client just like JavaScript, so that's a client-to-client call.

Can you clarify the scenario a bit... here's what I think you're asking:

<pre><code>private void Page_Load()
{
 string someValue = EXECUTE_JS_ON_CLIENT_AND_GET_RESULT();

 // do some stuff here while still on the server...
}
</code></pre>

If this is what you want to do, it's not possible. While on the server, you can't communicate with the client.

Is that what you meant?

Thanks,
-Timothy

blocks|key|2768622|text|我会看看JSON.Net+(结合了一个库jQuery也是免费的)，它们是开源的解决方案，使得这些问题变得容易得多。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2768623|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|$]]

I would check out JSON.Net (combined with a library [jQuery is also free]) they're open source solutions that makes these problems a lot easier.

Lets say on my page I have this function:

<pre><code> function ReturnFoo(bar)
 {
 return bar.toString() + "foo";
 }
</code></pre>

Now, I would like to have this called from ASP .NET, hopefully with the ASP .NET AJAX framework, as I am already using it in this codebase (I have already spent the 100k, might as well use it).

Also, I would like to get back the output that is returned from this function and then assign it to a variable created on the server side. And this is restricted to ASP .NET 2.0

Call Javascript function and return value from ASP .NET

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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假设在我的页面上有这样的函数： function ReturnFoo(bar) {   return bar.toString() + "foo"; }现在，我希望通过ASP .NET AJAX框架从ASP .NET调用它，因为我已经在这个代码库中使用了它(我已经花了100k，还不如用它)。此外，我还希望获得从该函数返回的输出，然后将其分配给在服务器端创建的变量。这仅限于ASP .NET 2.0。

问调用Javascript函数并从ASP .NET中返回值
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