VS2008(C#)子页嵌套母版页的控件访问方法(三)

VS2008(C#)子页嵌套母版页的控件访问方法(三)——嵌套三层母版页的子页

子页嵌套了三层母版页后,依次访问第一层、第二层、第三层母版页控件的实现方法如下:

第一层母版页HTML代码

<%@ Master Language="C#" AutoEventWireup="true" CodeFile="MasterPage.master.cs" Inherits="MasterPage_MasterPage" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server">     <title>MasterPage</title>     <asp:ContentPlaceHolder ID="head" runat="server">     </asp:ContentPlaceHolder> </head> <body>     <form id="form1" runat="server">     <div>         第一层母版页         <br />         <asp:Label ID="Master_Label" runat="server" Text="母版页(Label)"></asp:Label>         <br />         <br />         <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">         </asp:ContentPlaceHolder>     </div>     </form> </body> </html>

第二层母版页HTML代码

<%@ Master Language="C#" MasterPageFile="~/MasterPage/MasterPage.master" AutoEventWireup="true"     CodeFile="MasterPage2.master.cs" Inherits="MasterPage_MasterPage2" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server">     <%--添加第二层母版页的子页内容--%>     <asp:ContentPlaceHolder ID="head2" runat="Server">     </asp:ContentPlaceHolder> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">     第二层母版页     <br />     <asp:Label ID="Master2_Label" runat="server" Text="母版页2(Label)"></asp:Label>     <br />     <br />      <%--添加第二层母版页的子页内容--%>     <asp:ContentPlaceHolder ID="ContentPlaceHolder2" runat="Server">     </asp:ContentPlaceHolder> </asp:Content>

第三层母版页HTML代码

<%@ Master Language="C#" MasterPageFile="~/MasterPage/MasterPage2.master" AutoEventWireup="true"     CodeFile="MasterPage3.master.cs" Inherits="MasterPage_MasterPage3" %>

<%-- Add content controls here --%> <%--定义第三层母版页的内容项--%> <asp:Content ID="Content1" ContentPlaceHolderID="head2" runat="Server">     <asp:ContentPlaceHolder ID="head3" runat="Server">     </asp:ContentPlaceHolder> </asp:Content> <%--定义第三层母版页的内容项--%> <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder2" runat="Server">     第三层母版页     <br />     <asp:Label ID="Master3_Label" runat="server" Text="母版页3(Label)"></asp:Label>     <br />     <br />     <asp:ContentPlaceHolder ID="ContentPlaceHolder3" runat="Server">     </asp:ContentPlaceHolder> </asp:Content>

子页前台HTML代码

<%@ Page Title="" Language="C#" MasterPageFile="~/MasterPage/MasterPage3.master" AutoEventWireup="true" CodeFile="SubPage3.aspx.cs" Inherits="MasterPage_SubPage3" %>

<%-- Add content controls here --%> <%--继承第三层母版页的正文内容--%> <asp:Content ID="Content1" ContentPlaceHolderID="head3" runat="Server"> </asp:Content> <%--继承第三层母版页的正文内容--%> <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder3" runat="Server">     子页--333     <br />     <asp:Label ID="Sub3_Label" runat="server" Text="Label"></asp:Label>     <br />     <br />     <asp:Button ID="Button1" runat="server" Text="子页3访问母页3"     onclick="Button1_Click" />     <asp:Button ID="Button2" runat="server" Text="子页3注销母页3"         onclick="Button2_Click" />     <br />     <br />     <asp:Button ID="Button3" runat="server" Text="子页3访问母页2"         onclick="Button3_Click" />     <asp:Button ID="Button4" runat="server" Text="子页3注销母页2"         onclick="Button4_Click" />     <br />     <br />     <asp:Button ID="Button5" runat="server" Text="子页3访问母页1"         onclick="Button5_Click" />     <asp:Button ID="Button6" runat="server" Text="子页3注销母页1"         onclick="Button6_Click" />     <br /> </asp:Content>

子页后台CS代码

using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls;

public partial class MasterPage_SubPage3 : System.Web.UI.Page {     protected void Page_Load(object sender, EventArgs e)     {

    }

    //访问第三层母板控件     //登陆     protected void Button1_Click(object sender, EventArgs e)     {         //从第三层得到第一层的ContentPlaceHolder,来访问其中的控件(此时已为第二层)         ContentPlaceHolder cpMaster1 = (ContentPlaceHolder)Master.Master.Master.FindControl("ContentPlaceHolder1");         //第一层母板找到第二层母板的ContentPlaceHolder,来访问其中的控件(此时已为第三层)         ContentPlaceHolder cpMaster2 = (ContentPlaceHolder)cpMaster1.FindControl("ContentPlaceHolder2");         Label m3Label = (Label)cpMaster2.FindControl("Master3_Label");         m3Label.Text = "子页3 - 访问母版页3";     }     //注销     protected void Button2_Click(object sender, EventArgs e)     {         //从第三层得到第一层的ContentPlaceHolder,来访问其中的控件(此时已为第二层)         ContentPlaceHolder cpMaster1 = (ContentPlaceHolder)Master.Master.Master.FindControl("ContentPlaceHolder1");         //第一层母板找到第二层母板的ContentPlaceHolder,来访问其中的控件(此时已为第三层)         ContentPlaceHolder cpMaster2 = (ContentPlaceHolder)cpMaster1.FindControl("ContentPlaceHolder2");         Label m3Label = (Label)cpMaster2.FindControl("Master3_Label");         m3Label.Text = "母版页3(Label)";     }

    //访问第二层母板控件     //登陆     protected void Button3_Click(object sender, EventArgs e)     {         //从第三层得到第一层的ContentPlaceHolder,来访问其中的控件(此时已为第二层)         ContentPlaceHolder cpMaster1 = (ContentPlaceHolder)Master.Master.Master.FindControl("ContentPlaceHolder1");         Label m2Label = (Label)cpMaster1.FindControl("Master2_Label");         m2Label.Text = "子页3 - 访问母版页2";     }     //注销     protected void Button4_Click(object sender, EventArgs e)     {         //从第三层得到第一层的ContentPlaceHolder,来访问其中的控件(此时已为第二层)         ContentPlaceHolder cpMaster1 = (ContentPlaceHolder)Master.Master.Master.FindControl("ContentPlaceHolder1");         Label m2Label = (Label)cpMaster1.FindControl("Master2_Label");         m2Label.Text = "母版页2(Label)";     }

    //访问第一层母板控件     //登陆     protected void Button5_Click(object sender, EventArgs e)     {         Label mLabel = (Label)Master.Master.Master.FindControl("Master_Label");         mLabel.Text = "子页3 - 访问母版页1";     }     //注销     protected void Button6_Click(object sender, EventArgs e)     {         Label mLabel = (Label)Master.Master.Master.FindControl("Master_Label");         mLabel.Text = "母版页1(Label)";     } }

源代码下载: VS2008(C#)中的ASP.NET子页嵌套多层母版页的控件访问方法

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