动态创建用户控件。。VS2005下

        Control CNVPControl;
        switch (MediaType)
        {
            //播放Media格式
            case "1":
                CNVPControl = Page.LoadControl("~/UserControl/Public/PlayRm.ascx");
                CNVPControl.ID = "PlayMedia";
                PlaceHolder1.Controls.Add(CNVPControl);
                break;
            //播放RM,RMVB格式
            case "2":
                CNVPControl = Page.LoadControl("~/UserControl/Public/PlayRm.ascx");
                CNVPControl.ID = "PlayMedia";
                PlaceHolder1.Controls.Add(CNVPControl);
                break;
            //默认播放Media格式
            default:
                CNVPControl = Page.LoadControl("~/UserControl/Public/PlayMedia.ascx");
                CNVPControl.ID = "PlayMedia";
                PlaceHolder1.Controls.Add(CNVPControl);
                break;
        }