在Web程序中调用系统剪贴板出错!               //调用剪贴板
               System.Windows.Forms.IDataObject iData = System.Windows.Forms.Clipboard.GetDataObject();
               if (iData.GetDataPresent(System.Windows.Forms.DataFormats.Text))
               {
                   CoypStr = (string)iData.GetData(System.Windows.Forms.DataFormats.Text);
               }
运行时 显示iData为空,有啥解决方法不?Web剪贴板;未将对象实例化