Как указала Ханлет Эсканьо, это вполне возможно сделать.Я покажу:
Это разметка управления пользователя:
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="TemplatedUserControl.ascx.cs" Inherits="Templated_User_Control.TemplatedUserControl" %>
<table border="1">
<tr>
<th>Head</th>
</tr>
<tr>
<td>
<asp:PlaceHolder ID="plContent" runat="server"></asp:PlaceHolder>
</td>
</tr>
<tr>
<td>Foot</td>
</tr>
</table>
Это код управления пользователя:
using System;
using System.Web.UI;
namespace Templated_User_Control
{
public partial class TemplatedUserControl : System.Web.UI.UserControl
{
private ITemplate content_m = null;
[TemplateContainer(typeof(ContentContainer))]
[PersistenceMode(PersistenceMode.InnerProperty)]
public ITemplate Content
{
get
{
return content_m;
}
set
{
content_m = value;
}
}
void Page_Init()
{
if (content_m != null)
{
ContentContainer container = new ContentContainer();
//This is the real magic. Take the contents, and put it in our ContentContainer object, then
//add the ContentContainer object as a child control of the placeholder so it renders inside the user control
content_m.InstantiateIn(container);
this.plContent.Controls.Add(container);
}
}
protected void Page_Load(object sender, EventArgs e) {}
public class ContentContainer : Control, INamingContainer {}
}
}
Это разметка страницы:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Templated_User_Control.Default" %>
<%@ Register src="TemplatedUserControl.ascx" tagname="TemplatedUserControl" tagprefix="uc1" %>
<!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></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<uc1:TemplatedUserControl ID="TemplatedUserControl1" runat="server">
<Content>
Template user control test.<br />
<asp:Literal ID="litTest" runat="server">this is a test!</asp:Literal><br />
abc 123!
</Content>
</uc1:TemplatedUserControl>
</div>
</form>
</body>
</html>