mvc中的ViewData用到webfrom中去

 public class UserControlPageHelper : UserControl
    {
        protected IDictionary<string, object> ViewData
        {
            get
            {
                return
                    (Dictionary<string, object>)
                    (Session["ViewData"] ?? (Session["ViewData"] = new Dictionary<string, object>()));
            }
        }
        protected override void OnUnload(EventArgs e)
        {
            base.OnUnload(e);
            if (Session["ViewData"] == null) return;
            Session.Remove("ViewData");
            GC.Collect();
        }

        protected dynamic Model
        {
            get { return ViewData["Model"]; }
            set { ViewData["Model"] = value; }
        }
  }
}

      分别继承MasterPage, Page 和 UserController 类 
      注意一点 判断 ViewData.ContainsKey("x")

      用法：（前台代码）

<%if"__tip"stringstring"__tip"ifstringif"__refresh"stringstring"__refresh"ifstring

%>

本文转自曾祥展博客园博客，原文链接：http://www.cnblogs.com/zengxiangzhan/archive/2012/03/21/2410831.html，如需转载请自行联系原作者