求教：2个窗体之间的DataGridView操作

        private void dgvRequisitionList_CellEndEdit(object sender, DataGridViewCellEventArgs e)
        {
            ProductMan productMan = new ProductMan();
            if (e.ColumnIndex == 0)
            {
                productMan.Show();
                for (int i = 0; i < productMan.dgvProduct.Rows.Count; i++)
                {

                    productMan.dgvProduct.Rows[i].DataGridView.ForeColor = Color.Black;
                    productMan.dgvProduct.Rows[i].DataGridView.BackgroundColor = Color.White;
                }

                for (int i = 0; i < productMan.dgvProduct.Rows.Count; i++)
                {
                    if (dgvRequisitionList.CurrentRow.Cells[0].Value == productMan.dgvProduct.Rows[i].Cells[0].Value)
                    {

                        productMan.dgvProduct.Rows[i].Selected = true;
                        productMan.dgvProduct.Rows[i].DataGridView.ForeColor = Color.White;
                        productMan.dgvProduct.Rows[i].DataGridView.BackgroundColor = Color.Blue;

                    }
                }


            }
        }

应该怎么写才能让这两个for起作用呢 --------------------编程问答-------------------- e.ColumnIndex == 0用来起什么作用？ --------------------编程问答-------------------- js里面 window.open("ProductMan.aspx?id=xxxx");

然后在 ProductMan 页面里面根据Id去操作 --------------------编程问答-------------------- 发生此事件的单元格

补充：.NET技术 ,  C#