📄 default.aspx
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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajax" %>
<!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>天气预报</title>
</head>
<body style="text-align: center">
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<br />
<br />
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<table border="1" style="width: 285px">
<tr>
<td style="width: 100px">
地区:</td>
<td style="width: 100px">
<asp:DropDownList ID="Capital" runat="server" Width="200px">
</asp:DropDownList></td>
</tr>
<tr>
<td style="width: 100px">
城市:</td>
<td style="width: 100px">
<asp:DropDownList ID="City" runat="server" Width="200px">
</asp:DropDownList></td>
</tr>
<tr>
<td colspan="2">
<ajax:CascadingDropDown ID="CascadingDropDown1" runat="server" Category="Capital"
LoadingText="正在加载地区..." PromptText="请选择地区" ServiceMethod="GetCapital" TargetControlID="Capital"
ServicePath="WebService.asmx">
</ajax:CascadingDropDown>
<ajax:CascadingDropDown ID="CascadingDropDown2" runat="server" Category="City" LoadingText="正在加载城市..."
ParentControlID="Capital" PromptText="请选择城市" ServiceMethod="GetCity" TargetControlID="City"
ServicePath="WebService.asmx">
</ajax:CascadingDropDown>
<asp:Button ID="BtnList" runat="server" Text="查看" OnClick="BtnList_Click" />
</td>
</tr>
</table>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdateProgress ID="UpdateProgress1" runat="server" AssociatedUpdatePanelID="UpdatePanel1">
<ProgressTemplate>
<img src="image/wait.gif" />请稍等, 正在向服务器提交数据......
</ProgressTemplate>
</asp:UpdateProgress>
<br />
<asp:UpdatePanel ID="UpdatePanel2" runat="server">
<ContentTemplate>
<asp:Label ID="Label1" runat="server"></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
</html>
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