ASP.NET动态控件创建-优快云博客

.aspx页面：

<%@ Page Language="C#" Theme="SkinFile"  AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!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>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Panel ID="container" runat="server">
        </asp:Panel>
    </div>
    </form>
</body>
</html>

.cs代码：

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 _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        createContent("样式1");
    }

    protected void createContent(string style) {
        Label lb = new Label();                      //1、new创建控件实例;
        lb.Text = "测试文本<br>";
        lb.ID = "lb1";
        lb.Attributes["style"] = "display:block;width:200px; height:50px; text-align:center ;padding :50px 0 0 0;";
        createLabel(style,lb);
        container.Controls.Add(lb);                  //2、添加进页面，container是asp:Panel
        for (int i = 0; i < 4; i++)
        {
            Button btn = new Button();
            btn.Text = "样式" + i;
            btn.ID = "bt" + i;
            btn.CommandName = "样式" + i;
            btn.Click += new EventHandler(btn_Click);//指定方法格式
            container.Controls.Add(btn);
        }
    }

    protected void createLabel(string style,Label lb) {
        switch (style)
        { 
            case "样式0":
                lb.SkinID = "aa";
            break;
            case "样式1":
                lb.SkinID = "bb";
            break;
            case "样式2":
                lb.SkinID = "cc";
            break;
            case "样式3":
                lb.SkinID = "dd";
            break;

        }
    }

    protected void btn_Click(object o, EventArgs e)
    {
        container.Controls.Clear();
        createContent(((Button)o).CommandName);
    }
}

结果如同：

<asp:Label runat="server" backcolor="red" SkinId="aa" />
<asp:Label runat="server" backcolor="green" SkinId="bb" />
<asp:Label runat="server" backcolor="yellow" SkinId="cc" />
<asp:Label runat="server" backcolor="orange" SkinId="dd" />

综上：只记住需要两步即可