#有关从内容页引用母版页控件的有关问题
日期：2014-05-18 浏览次数：20643 次
#################################有关从内容页引用母版页控件的问题
#####################################################################
master.aspx文件内容如下:
<%@ Master Language= "C# " AutoEventWireup= "true " CodeFile= "MasterPage.master.cs " Inherits= "MasterPage " %>
<html xmlns= "http://www.w3.org/1999/xhtml " >
<head runat= "server ">
<title> 无标题页 </title>
</head>
<body>
<form id= "form1 " runat= "server ">
<asp:contentplaceholder id= "cphTest " runat= "server ">
<asp:Label ID= "lblMessage " runat= "server " Text= "Labelsecond "> </asp:Label>
</asp:contentplaceholder>
</form>
</body>
</html>
########################################################################
default.aspx文件内容如下:
<%@ Page Language= "C# " MasterPageFile= "~/MasterPage.master " AutoEventWireup= "true " CodeFile= "Default2.aspx.cs " Inherits= "Default2 " Title= "Untitled Page " %>
<%@ MasterType VirtualPath= "~/MasterPage.master " %>
<asp:Content ID= "Content1 " ContentPlaceHolderID= "cphTest " Runat= "Server ">
</asp:Content>
#######################################################################
default.aspx.cs文件内容如下:
public partial class Default2 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
ContentPlaceHolder cph;
Label lblMe;
cph = (ContentPlaceHolder)Master.FindControl( "cphTest ");
if (cph != null)
{
Response.Write(cph.ID + " <br /> ");
lblMe = (Label)cph.FindControl( "lblMessage ");
if (lblMe != null)
Response.Write(lblMe.ID);
else
Response.Write( "Null ");
}
}
}
############################################################
疑问:为什么上面的代码输出Null?找不到lblMessage控件吗???
谢谢!!!
------解决方案--------------------
你要把 <asp:Label ID= "lblMessage " runat= "server " Text= "Labelsecond "> <
#####################################################################
master.aspx文件内容如下:
<%@ Master Language= "C# " AutoEventWireup= "true " CodeFile= "MasterPage.master.cs " Inherits= "MasterPage " %>
<html xmlns= "http://www.w3.org/1999/xhtml " >
<head runat= "server ">
<title> 无标题页 </title>
</head>
<body>
<form id= "form1 " runat= "server ">
<asp:contentplaceholder id= "cphTest " runat= "server ">
<asp:Label ID= "lblMessage " runat= "server " Text= "Labelsecond "> </asp:Label>
</asp:contentplaceholder>
</form>
</body>
</html>
########################################################################
default.aspx文件内容如下:
<%@ Page Language= "C# " MasterPageFile= "~/MasterPage.master " AutoEventWireup= "true " CodeFile= "Default2.aspx.cs " Inherits= "Default2 " Title= "Untitled Page " %>
<%@ MasterType VirtualPath= "~/MasterPage.master " %>
<asp:Content ID= "Content1 " ContentPlaceHolderID= "cphTest " Runat= "Server ">
</asp:Content>
#######################################################################
default.aspx.cs文件内容如下:
public partial class Default2 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
ContentPlaceHolder cph;
Label lblMe;
cph = (ContentPlaceHolder)Master.FindControl( "cphTest ");
if (cph != null)
{
Response.Write(cph.ID + " <br /> ");
lblMe = (Label)cph.FindControl( "lblMessage ");
if (lblMe != null)
Response.Write(lblMe.ID);
else
Response.Write( "Null ");
}
}
}
############################################################
疑问:为什么上面的代码输出Null?找不到lblMessage控件吗???
谢谢!!!
------解决方案--------------------
你要把 <asp:Label ID= "lblMessage " runat= "server " Text= "Labelsecond "> <
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