Question

DropDownList 回发取值问题

绑定:

protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
NType.DataSource = tags.GetList(1, 2);
NType.DataTextField = "Title";
NType.DataValueField = "TID";
NType.DataBind();
}
}

NType_SelectedIndexChanged:

protected void NType_SelectedIndexChanged(object sender, System.EventArgs e)
{
NSort.ClearSelection();
NSort.DataSource = tags.GetList(int.Parse(NType.SelectedValue.ToString()), 1);
NSort.DataTextField = "Title";
NSort.DataValueField = "TID";
NSort.DataBind();
}

aspx:

<asp:DropDownList ID="NType" runat="server" OnSelectedIndexChanged="NType_SelectedIndexChanged" AutoPostBack="True">
</asp:DropDownList>

头部:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="newsadd.aspx.cs" Inherits="FoodAdmin_web_newsadd" EnableEventValidation="false"%>

生成:

<select name="NType" onchange="javascript:setTimeout('__doPostBack(\'NType\',\'\')', 0)" language="javascript" id="NType">
<option selected="selected" value="5">P一</option>
<option value="6">P二</option>

</select>

问题:

<!--
var theForm = document.forms['form1'];
if (!theForm) {
theForm = document.form1;
}
function __doPostBack(eventTarget, eventArgument) {
if (!theForm.onsubmit || (theForm.onsubmit() != false)) {
theForm.__EVENTTARGET.value = eventTarget;
theForm.__EVENTARGUMENT.value = eventArgument; //对象不支持此属性或方法
theForm.submit();
}
}
// -->
</script>

选择其它项时提示 脚本//对象不支持此属性或方法

并且不回发,DropDownList值也不改变

Answer 1

你的页面上是不是有个按钮，它的ID是不是等于“submit”？如果有，把这个ID改成其它的。按钮的ID 不能为submit

Answer 2

直接运行有问题么？
执行不调试！看错误在何处！