如何设置从JavaScript C＃的变量值 [英] How to set a C# variable value from javascript

问题描述

我在做一个Ajax请求和存储我在隐藏field.I'm响应使用getelementbyid.value.This javascript函数是身体上通过JavaScript这样做onload.Now后，我得到这个值，我想用这在C＃。我不能有任何按钮的o​​nclick事件sort.Just的或任何有一个隐藏的输入类型

I'm making an ajax request and storing my response in an hidden field.I'm doing this through javascript using getelementbyid.value.This javascript function is on body onload.Now after I get this value I would like to use this in C#.I can't have any button onclick event or anything of that sort.Just have a hidden input type

推荐答案

如果一个asp.net HidenField的WebControl的值那么所有你需要做的是以下内容：

If an asp.net HidenField webControl has a value then all you need to do is the following:

aspx页面：

        <asp:hiddenfield id="hf_MyValue"
          value="whatever" 
          runat="server"/>

CS页：

string value = hf_MyValue.Value;

如果你想要做的东西时，它的分配处理onValueChanged事件的值：

If you want to do something with the value when it's assigned handle the onValueChanged event:

        <asp:hiddenfield id="hf_MyValue"
          onvaluechanged="ValueHiddenField_ValueChanged"
          value="whatever" 
          runat="server"/>

虽然可以使用正在使用的JavaScript在C＃中设置一个asp.net HiddenField的值，请确保你明白，这只能在回发之后进行。

While you CAN use a value of an asp.net HiddenField that is set using javascript in C# make sure that you understand that this can only be done after a postback.

下面是一些信息的客户端/服务器关系。使用Javascript和C在你的问题分别为＃。

Here is some info on the Client/Server relationship. Javascript and C# respectively in your question.

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