private string GetNowSelectedStreamItem()
 {
     if (LstVideoStream.SelectedItems.Count == 0)
     {
         var lstCount = LstVideoStream.Items.Count;
         Program.ShowNotice(5000, "编辑流信息", $"未选中需要编辑的流,{(lstCount > 0 ? "已为您选中第一项" : "当前无任何流信息,请先添加")}", ToolTipIcon.Warning);
         if (lstCount > 0)
         {
             LstVideoStream.Focus();
             LstVideoStream.Items[0].Selected = true;
         }
         return(null);
     }
     return(LstVideoStream.SelectedItems[0].SubItems[0].Text);
 }
 private void RelocateLstVideoStream()
 {
     LstVideoStream.ListViewItemSorter = new LstVideoCmpByPrivilege();
     LstVideoStream.Sort();
 }