温故知新ASP.NET 2.0(C#)(1) - MasterPage(母版页)

<%--创建对母版页的强类型引用，并指定到母版页的虚拟路径--%> 
<%@ MasterType VirtualPath="~/MasterPage/MasterPage.master" %>

<%@ Master Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" 
        CodeFile="MasterPage.master.cs" Inherits="MasterPage_MasterPage" %> 
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server"> 
        <p> 
                我是一个嵌套母版页 
        </p> 
        <p> 
                母版页中的内容 
                <asp:DropDownList ID="ddlMaster" runat="server" DataSourceID="XmlDataSource1" DataTextField="text" 
                        DataValueField="value" AutoPostBack="True" OnSelectedIndexChanged="ddlMaster_SelectedIndexChanged"> 
                </asp:DropDownList><asp:XmlDataSource ID="XmlDataSource1" runat="server" DataFile="~/Config/DropDownListData.xml"> 
                </asp:XmlDataSource> 
        </p> 
        <p> 
                内容页中的内容 
                <asp:ContentPlaceHolder ID="cph" runat="Server" /> 
        </p> 
</asp:Content>

using System; 
using System.Data; 
using System.Configuration; 
using System.Collections; 
using System.Web; 
using System.Web.Security; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Web.UI.WebControls.WebParts; 
using System.Web.UI.HtmlControls; 
 
public partial  class MasterPage_MasterPage : System.Web.UI.MasterPage 
{ 
         protected  void Page_Load( object sender, EventArgs e) 
        { 
 
        } 
 
         /// <summary> 
         /// 设置ddlMaster的选中索引 
         /// 这个方法由内容页调用 
         /// </summary> 
         /// <param name="index"></param> 
         public  void SetddlMaster( int index) 
        { 
                ddlMaster.SelectedIndex = index; 
        } 
 
         protected  void ddlMaster_SelectedIndexChanged( object sender, EventArgs e) 
        { 
                 // ddlMaster的选中索引改变后，激发SelectedIndexChanged_ddlMaster事件 
                SelectedIndexChanged_ddlMaster( this,  new CommandEventArgs(ddlMaster.SelectedItem.Text, ddlMaster.SelectedValue)); 
        } 
 
         // 声明一个公共时间事件，让内容页用 
         public  event CommandEventHandler SelectedIndexChanged_ddlMaster; 
}

<%@ Page Language="C#" MasterPageFile="~/MasterPage/MasterPage.master" AutoEventWireup="true" 
        CodeFile="Test.aspx.cs" Inherits="MasterPage_Test" Title="MasterPage测试" %> 

<%--创建对母版页的强类型引用，并指定到母版页的虚拟路径--%> 
<%@ MasterType VirtualPath="~/MasterPage/MasterPage.master" %> 
<asp:Content ID="Content1" ContentPlaceHolderID="cph" runat="Server"> 
        <asp:dropdownlist id="ddlPage" runat="server" datasourceid="XmlDataSource1" datatextfield="text" 
                datavaluefield="value" autopostback="True" onselectedindexchanged="ddlPage_SelectedIndexChanged"> 
        </asp:dropdownlist> 
        <asp:xmldatasource id="XmlDataSource1" runat="server" datafile="~/Config/DropDownListData.xml"> 
        </asp:xmldatasource> 
</asp:Content>

using System; 
using System.Data; 
using System.Configuration; 
using System.Collections; 
using System.Web; 
using System.Web.Security; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Web.UI.WebControls.WebParts; 
using System.Web.UI.HtmlControls; 
 
public partial  class MasterPage_Test : System.Web.UI.Page 
{ 
         protected  void Page_Load( object sender, EventArgs e) 
        { 
                 // 在内容页用FindControl方法找到内容页中的控件 
                DropDownList ddl =  new DropDownList(); 
                ddl = Master.Master.FindControl( "ContentPlaceHolder1").FindControl( "cph").FindControl( "ddlPage")  as DropDownList; 
                Master.Master.FindControl( "ContentPlaceHolder1").FindControl( "cph").Controls.Add( new LiteralControl( "<br />内容页中的DropDownList的ClientID是：" + ddl.ClientID)); 
 
                 // 增加一个事件处理，该事件是在母版页定义的一个公共事件 
                Master.SelectedIndexChanged_ddlMaster +=  new CommandEventHandler(Master_SelectedIndexChanged_ddlMaster); 
        } 
 
         void Master_SelectedIndexChanged_ddlMaster( object sender, CommandEventArgs e) 
        { 
                 // CommandEventArgs已经在母版页中的公共事件“SelectedIndexChanged_ddlMaster”中指定 
                 string selectedText = e.CommandName; 
                 string selectedValue = e.CommandArgument.ToString(); 
 
                ddlPage.SelectedValue = selectedValue; 
        } 
 
         protected  void ddlPage_SelectedIndexChanged( object sender, EventArgs e) 
        { 
                 // 调用母版页的方法 
                Master.SetddlMaster(ddlPage.SelectedIndex); 
        } 
}

     本文转自webabcd 51CTO博客，原文链接：http://blog.51cto.com/webabcd/344833，如需转载请自行联系原作者