win form 下， context menu的定位。

private void gvList_CellMouseClick(object sender, DataGridViewCellMouseEventArgs e)

        {

            if (e.Button == System.Windows.Forms.MouseButtons.Right)

            {



                DataGridView.HitTestInfo hitTestInfo = gvList.HitTest(e.X, e.Y);

                Point pt = gvList.PointToClient(Control.MousePosition);

                //if (hitTestInfo.Type == DataGridViewHitTestType.Cell)

                ctxGvList.Show(gvList, pt);

            }

        }