for (int c = 5; c <= 14; c++)
            {
                if (e.Button == MouseButtons.Left && f.listGrid.Col == c)
                {
                    Sift frmSift = new Sift();                     
                    DataTable dt = new DataTable();
                    dt.Columns.Add("编号");
                    dt.Columns.Add("姓名");
                    dt.Columns.Add("Mark1");
                    dt.Columns.Add("Mark2");
                    dt.Columns.Add("Mark3");

                    for (int r = f.listGrid.Rows.Fixed; r <= f.dataGrid.Rows.Count; r++)
                    {
                        Int32 qh = Convert.ToInt32(f.listGrid[r, 1]);
                        Int32 w = Convert.ToInt32(f.listGrid[r, 2]);
                        Int32 q = Convert.ToInt32(f.listGrid[r, 3]);
                        Int32 b = Convert.ToInt32(f.listGrid[r, 4]);

                        if (f.listGrid.GetCellImage(r, c) != null)
                        {
                            DataRow dr = dt.Rows.Add();
                            dr["编号"] = f.listGrid[r, 0];
                            dr["姓名"] = xm;
                            dr["Mark1"] = m1;
                            dr["Mark2"] = m2;
                            dr["Mark3"] = m3;
                        }
                    }
                    frmSift.siftData(dt);
                    frmSift.ShowDialog();
                }
            }