DropDownList 选择改变时促发事件没反应
<%@PageLanguage="C#"AutoEventWireup="true"CodeFile="Default.aspx.cs"Inherits="_Defaul...
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<div>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:DropDownList ID="ddlProv" runat="server" OnSelectedIndexChanged="ddlProv_SelectedIndexChanged">
</asp:DropDownList>
<asp:DropDownList ID="ddlCity" runat="server" OnSelectedIndexChanged="ddlCity_SelectedIndexChanged">
</asp:DropDownList>
<asp:DropDownList ID="ddlArea" runat="server">
</asp:DropDownList>
<asp:Label ID="lbComplete" runat="server" Text="Label"></asp:Label>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdateProgress ID="UpdateProgress1" runat="server">
<ProgressTemplate>
<img src="1.gif" alt="wait" />请稍候^_^
</ProgressTemplate>
</asp:UpdateProgress>
</div>
</form>
</body>
</html>
选择改变，没有反应 展开
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<div>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:DropDownList ID="ddlProv" runat="server" OnSelectedIndexChanged="ddlProv_SelectedIndexChanged">
</asp:DropDownList>
<asp:DropDownList ID="ddlCity" runat="server" OnSelectedIndexChanged="ddlCity_SelectedIndexChanged">
</asp:DropDownList>
<asp:DropDownList ID="ddlArea" runat="server">
</asp:DropDownList>
<asp:Label ID="lbComplete" runat="server" Text="Label"></asp:Label>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdateProgress ID="UpdateProgress1" runat="server">
<ProgressTemplate>
<img src="1.gif" alt="wait" />请稍候^_^
</ProgressTemplate>
</asp:UpdateProgress>
</div>
</form>
</body>
</html>
选择改变，没有反应 展开
1个回答
展开全部
大哥：AutoPostBack="True"
这么重要的属性你都忘了，
没这个属性是 不会执行回发事件的！！！！
代码写的还算规范吧，继续努力吧！！！
这么重要的属性你都忘了，
没这个属性是 不会执行回发事件的！！！！
代码写的还算规范吧，继续努力吧！！！
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