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