ASP.NET Tutorial/Custom Controls/Ajax — различия между версиями

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Версия 18:30, 26 мая 2010

AJAX and User Controls

   <source lang="csharp">

File: Control.ascx <%@ Control Language="C#" ClassName="RandomQuotation" %> <%@ Import Namespace="System.Collections.Generic" %> <script runat="server">

   void Page_Load()
   {
       List<string> quotes = new List<string>();
       quotes.Add("A");
       quotes.Add("B");
       quotes.Add("C");
       Random rnd = new Random();
       lblQuote.Text = quotes[rnd.Next(quotes.Count)];
   }

</script> <asp:ScriptManager ID="sm1" runat="server" /> <asp:Timer ID="Timer1" Interval="5000" runat="server" /> <asp:UpdatePanel ID="up1" runat="server"> <Triggers>

   <asp:AsyncPostBackTrigger ControlID="Timer1" />

</Triggers> <ContentTemplate>

   <asp:Label
       id="lblQuote"
       Runat="server" />

</ContentTemplate> </asp:UpdatePanel>

File: Default.aspx <%@ Page Language="C#" %> <%@ Register TagPrefix="user" TagName="RandomQuotation" Src="~/Control.ascx" %> <!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 id="Head1" runat="server">

   <style type="text/css">
       .quote
       {
           width:200px;
           padding:20px;
           border:Dotted 2px orange;
           background-color:#eeeeee;
           font:16px Georgia,Serif;
       }
   </style>
   <title>Show Random Quotation</title>

</head> <body>

   <form id="form1" runat="server">
   <%= DateTime.Now %>
   
<user:RandomQuotation id="RandomQuotation1" Runat="server" />
   </form>

</body> </html> File: Web.Config <?xml version="1.0"?> <configuration>

   <system.web>
       <customErrors mode="Off"/>
       <compilation debug="true"/>
       <pages>
           <controls>
               <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
           </controls>
       
       </pages>    
   </system.web>

</configuration></source>