private void btn_delete_Click(object sender, EventArgs e)
 {
     foreach (var item in pn_image.Controls)
     {
         if (item is ImageAttachModelView)
         {
             if ((item as ImageAttachModelView).IsChoose)
             {
                 pn_image.Controls.Remove(item as Control);
                 if (!(item as ImageAttachModelView).ImageAttach.IsLocal)
                 {
                     DeletedImageAttachList.Add((item as ImageAttachModelView).ImageAttach);
                 }
                 if (OnImageAttachDeleted != null)
                 {
                     OnImageAttachDeleted((item as ImageAttachModelView).ImageAttach);
                 }
                 (item as Control).Dispose();
                 OnAddorRemoveImage();
                 break;
             }
         }
     }
 }
 public void ClearDeletedImageAttachList()
 {
     DeletedImageAttachList.Clear();
 }