设置的AutoPostBack闪光之前会话变量在ASP：按钮 [英] Setting a session variable before AutoPostBack fires in an asp:Button

问题描述

我怎么会去从ASP的设置点击会话变量：一个的AutoPostBack事件触发之前按钮

How would I go about setting a session variable from the click of an ASP:Button before an AutoPostBack event fires.

下面是我的权利，但我不完全知道我在做这个权利：

Here is what I have right now, but I'm not exactly sure I'm doing this right:

 <asp:Button ID="CommitBTN" runat="server" PostBackUrl="~/MMR_Home.aspx" 
 onclick="CommitBTN_Click" UseSubmitBehavior="true" 
 OnClientClick='<% string temp1 = "true"; Session["ClickedFlag"] = temp1; %>' Text="Commit Changes to Database" />

这会是执行这个动作的正确方法还是我在准备这完全错了？

Would this be the correct way of performing this action or am I going at it completely wrong?

编辑：

我的按钮标签更改为此：

Changed my button tag to this:

 <asp:Button ID="CommitBTN" runat="server" PostBackUrl="~/MMR_Home.aspx" 
 onclick="CommitBTN_Click" OnClientClick="document.getElementById('<%= Hidden.ClientID
  %>').value='1'" UseSubmitBehavior="true" Text="Commit Changes to Database" />

我收到这是我的错误：

I receive this as my error:

微软JScript运行时错误：无法设置属性价值的价值：对象为null或undefined

Microsoft JScript runtime error: Unable to set value of the property 'value': object is null or undefined

推荐答案

使用这样的：

里面aspx文件：

<form runat="server">
    <asp:Button ID="CommitBTN" runat="server" Text="Button" onclick="CommitBTN_Click" OnClientClick="document.getElementById('HiddenField').value='Ram'"/>
    <asp:HiddenField ID="HiddenField" runat="server" />
</form>

或

<script type="text/javascript">
    function setMyHiddenField(myValue) {
        document.getElementById('HiddenField').value = myValue;
}
</script>

<form runat="server">
<asp:Button ID="CommitBTN" runat="server" Text="Button" onclick="CommitBTN_Click" OnClientClick="setMyHiddenField('Ram')"/>
<asp:HiddenField ID="HiddenField" runat="server" />

=============================================== ===================

==================================================================

aspx.cs文件中

protected void CommitBTN_Click(object sender, EventArgs e)
    {
        Session["ClickedFlag"] = HiddenField.Value;
        Response.Write(Session["ClickedFlag"]);
    }

这是很容易replase拉姆与你的价值。 ;）

It is easy to replase "Ram" with your value. ;)

您可以更改拉姆TEMP1容易：

you can change Ram to temp1 easy:

setMyHiddenField（'temp1目录'）

或者你可以调用这个函数在你的其他控件的事件befor CommitBTN pressed

Or you can call this function on your another control events befor CommitBTN pressed

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