asp.net 动态加载用户控件

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如何能将我们建好的用户控件，通过代码动态地加载到页面中去呢我最近就遇到了一个这样的问题，在网上搜索了几个方法以后，自己做了实验，实验的结果还算是满意，特意将代码保存下来，以免以后会用到。

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="jxytest.aspx.cs" Inherits="D8Miracle_Web_jxytest" %> <%@ Register Src="../UserContrl/D8Top.ascx" TagName="D8Top" 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>无标题页</title> <link href="../CSS/cssx.css" mce_href="CSS/cssx.css" rel="stylesheet" type="text/css" /> <link href="../css/style.css" mce_href="css/style.css" rel="stylesheet" type="text/css" /> </head> <body> <form id="form1" runat="server"> <div> <asp:PlaceHolder id="PlaceHolder1" runat="server"></asp:PlaceHolder> <asp:Button id="Button1" runat="server" Text="加载用户控件" OnClick="Button1_Click"></asp:Button> </div> </form> </body> </html>

cs代码如下

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 D8Miracle_Web_jxytest : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { if (ViewState["adduc"] == null) { adduc(); } } } public void adduc() { UserContrl_D8Top uc = (UserContrl_D8Top)Page.LoadControl("../UserContrl/D8Top.ascx"); uc.ID = "uc"; this.PlaceHolder1.Controls.Clear(); this.PlaceHolder1.Controls.Add(uc); } public void Button1_Click(object sender, System.EventArgs e) { if (ViewState["adduc"] == null) { adduc(); ViewState["adduc"] = 1; } } }

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