ASP.NET AJAX入门系列（4）：使用ScriptManager控件实例

二．一个简单的示例

这个例子其实是UpdatePanel示例，在页面中加入了日期控件和一个下拉框，根据下拉框选择的不同，日期控件背景变为不同的颜色。示例代码如下：

<% @ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default"  %>

 

< script  runat ="server" >

    void DropDownSelection_Change(Object sender, EventArgs e)

    {

        Calendar1.DayStyle.BackColor =

            System.Drawing.Color.FromName(ColorList.SelectedItem.Value);

    }

</ script >

 

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

< head  id ="Head1"  runat ="server" >

     < title > ScriptManager Example </ title >

</ head >

< body >

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

         < div >

             < asp:ScriptManager  ID ="ScriptManager1"  

                               runat ="server" >

             </ asp:ScriptManager >

             < asp:UpdatePanel  ID ="UpdatePanel1"

                             runat ="server" >

                 < ContentTemplate >

                     < asp:Calendar  ID ="Calendar1"  

                                  ShowTitle ="True"

                                  runat ="server"   />

                     < div >

                        Background:

                         < br  />

                         < asp:DropDownList  ID ="ColorList"  

                                          AutoPostBack ="True"  

                                          OnSelectedIndexChanged ="DropDownSelection_Change"

                                          runat ="server" >

                             < asp:ListItem  Selected ="True"  Value ="White" >  

                            White  </ asp:ListItem >

                             < asp:ListItem  Value ="Silver" >  

                            Silver  </ asp:ListItem >

                             < asp:ListItem  Value ="DarkGray" >  

                            Dark Gray  </ asp:ListItem >

                             < asp:ListItem  Value ="Khaki" >  

                            Khaki  </ asp:ListItem >

                             < asp:ListItem  Value ="DarkKhaki" >  D

                            ark Khaki  </ asp:ListItem >

                         </ asp:DropDownList >

                     </ div >

                 </ ContentTemplate >

             </ asp:UpdatePanel >

             < br  />

         </ div >

     </ form >

</ body >

</ html >