using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; namespace xuyuanwang.myControl { public partial class Lablexuyuan : System.Web.UI.UserControl { string a = "ok"; public string A { set { a = value; } get { return a; } } protected void Page_Load(object sender, EventArgs e) { Label1.Text = A; } } }

public partial class WebForm1 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void Button1_Click(object sender, EventArgs e) { myControl.Lablexuyuan ctl = (myControl.Lablexuyuan)Page.LoadControl("myControl/Lablexuyuan.ascx"); ctl.A = this.TextBox1.Text; ArrayList list = addl(ctl); for (int i = 0; i < list.Count; i++) { myControl.Lablexuyuan ctl2 = (myControl.Lablexuyuan)list[i]; this.UpdatePanel1.ContentTemplateContainer.Controls.Add(ctl2); } } private System.Collections.ArrayList addl(myControl.Lablexuyuan l) { System.Collections.ArrayList list = null; if (Session["a"] != null) { list = (ArrayList)Session["a"]; } else { list = new ArrayList(); } list.Add(l); Session["a"] = list; return list; }