foreach (System.Web.UI.HtmlControls.HtmlImage c in ThumbnailPanel.Controls) if (c is System.Web.UI.HtmlControls.HtmlImage) System.Web.UI.HtmlControls.HtmlImage imageBox = (System.Web.UI.HtmlControls.HtmlImage所以我得到以下错误
Unable to cast object of t
public HtmlImage UIAbmeldenImage get if ((this.mUIAbmeldenImage == null)) this.mUIAbmeldenImage = new HtmlImage(this); this.mUIAbmeldenImage.SearchProperties[<e