DataGrid行单元格合并显示

//绑定数据集
        public void BindGrid()
        {
            DataSet ds = new DataSet();
            sqlDataAdapter2.Fill(ds);
            DataGrid2.DataSource = ds.Tables[0];
            DataGrid2.DataBind();
            //合并相同的单元格
            string strTemp;
            int intSpan = 0;
            int nowSpan = 0;

            int i, j;
            for(i = 0; i < DataGrid2.Items.Count; i++)
            {
                intSpan = 1;
                strTemp = DataGrid2.Items[i].Cells[0].Text;

                //DataGrid2.Items[i].BackColor = Color.SkyBlue;
                for(j = i + 1; j< DataGrid2.Items.Count; j++)
                {
                    if(String.Compare(strTemp,DataGrid2.Items[j].Cells[0].Text)==0)
                    {
                        intSpan = intSpan + 1;
                        DataGrid2.Items[i].Cells[0].RowSpan = intSpan;
                        //DataGrid2.Items[i].Cells[1].RowSpan = intSpan;
                        //DataGrid2.Items[i].Cells[2].RowSpan = intSpan;
                        DataGrid2.Items[i].Cells[3].RowSpan = intSpan;

                        //DataGrid2.Items[j].BackColor = Color.SkyBlue;

                        DataGrid2.Items[j].Cells[0].Visible = false;
                        //DataGrid2.Items[j].Cells[1].Visible = false;
                        //DataGrid2.Items[j].Cells[2].Visible = false;
                        DataGrid2.Items[j].Cells[3].Visible = false;

                    }
                }
                
                nowSpan += intSpan;
                i = nowSpan - 1;

            }

        }