对于我的其中一页上具有autopostback = true的任何内容，我收到“ Microsoft JScript运行时错误：对象不支持此属性或方法”错误

Question

I have a .NET application with the following aspx code: 我有一个带有以下aspx代码的.NET应用程序：

<%@ Page Language="C#" AutoEventWireup="True" CodeBehind="Default.aspx.cs" Inherits="WebApplication1.Default"%>
<%@ Register TagPrefix="asp" Namespace="AjaxControlToolkit" Assembly="AjaxControlToolkit"%>
<%@ Register assembly="Telerik.Web.UI" namespace="Telerik.Web.UI" tagprefix="telerik"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >

<body>
<form id="form1" runat="server">

<asp:ToolkitScriptManager ID="ScriptManager1" runat="server" EnablePartialRendering="true">
</asp:ToolkitScriptManager>
<table>
<tr>
<td>
    <asp:RadioButtonList ID="rblTest" runat="server" AutoPostBack="True" 
        onselectedindexchanged="rblTest_SelectedIndexChanged">
        <asp:ListItem Text="1" Value="1"></asp:ListItem>
        <asp:ListItem Text="2" Value="2"></asp:ListItem>
    </asp:RadioButtonList>
</td>
<td>
    <asp:PlaceHolder ID="ph1" runat="server" Visible="False">
        Some text
    </asp:PlaceHolder>
</td>
</tr>
</table>
</form>
</body>
</html>

I then have a C# method as follows: 然后，我有一个C＃方法，如下所示：

protected void rblTest_SelectedIndexChanged(object sender, EventArgs e)
{
    if (rblTest.SelectedValue == "2")
        ph1.Visible = true;
    else
        ph1.Visible = false;
}

Below is where the crash occurred. 以下是发生崩溃的地方。 It crashes any time I use a control that has autopostback=true. 每当我使用具有autopostback = true的控件时，它就会崩溃。 I use the same syntax on about 15 other forms and those all work just fine. 我在大约15种其他形式上使用了相同的语法，并且所有这些都很好用。 Am I missing a property somewhere or is there something wrong with my method? 我在某处缺少属性还是我的方法有问题？ I originally had an UpdatePanel around the controls and I plan on adding it again, but I need to get the postback working first. 我最初在控件周围有一个UpdatePanel，我打算再次添加它，但是我需要首先使回发工作。

<script type="text/javascript">
//<![CDATA[
var theForm = document.forms['Default'];
if (!theForm) {
    theForm = document.Default;
}
function __doPostBack(eventTarget, eventArgument) {
    if (!theForm.onsubmit || (theForm.onsubmit() != false)) {
        theForm.__EVENTTARGET.value = eventTarget;
        theForm.__EVENTARGUMENT.value = eventArgument;
        theForm.submit();             <-----Crashed at this line.
    }
}
//]]>
</script>

What am I missing or is there some common mistake that I may have made somewhere? 我错过了什么，或者我可能在某个地方犯了一些常见的错误？ Thanks in advance for your help. 在此先感谢您的帮助。

Answer 1

Your __doPostBack script is trying to submit a form with id "Default" (see document.forms["Default"] line; yet your markup shows a form with id "form1" so it's clear why it doesn't work: the __doPostBack function is not finding the form and calling theForm.submit() fails. 您的__doPostBack脚本正在尝试提交ID为"Default"的表单（请参见document.forms["Default"]行；但是您的标记显示的表单为ID为"form1"的表单，因此很清楚为什么它不起作用： __doPostBack函数找不到表单，调用theForm.submit()失败。

You can attempt to fix it by renaming the form to use the id "Default" since I don't think you can control the way the __doPostBack script is generated. 您可以尝试通过重命名表单以使用ID "Default"来修复它，因为我认为您无法控制__doPostBack脚本的生成方式。

对于我的其中一页上具有autopostback = true的任何内容，我收到“ Microsoft JScript运行时错误：对象不支持此属性或方法”错误

问题描述

1 个解决方案

解决方案1
0 2013-07-31 16:53:58

对于我的其中一页上具有autopostback = true的任何内容，我收到“ Microsoft JScript运行时错误：对象不支持此属性或方法”错误

问题描述

1 个解决方案

解决方案1 0 2013-07-31 16:53:58

解决方案1
0 2013-07-31 16:53:58