C# DataGridView转DataTable

        public static DataTable ToDataTable(this DataGridView dataGridView, string tableName = null)

        {

            DataGridView dgv = dataGridView;

            DataTable table = new DataTable(tableName);

            for (int iCol = ; iCol < dgv.Columns.Count; iCol++)

            {

                table.Columns.Add(dgv.Columns[iCol].Name);

            }

            foreach (DataGridViewRow row in dgv.Rows)

            {

                DataRow datarw = table.NewRow();

                for (int iCol = ; iCol < dgv.Columns.Count; iCol++)

                {

                    datarw[iCol] = row.Cells[iCol].Value;

                }

                table.Rows.Add(datarw);

            }

            return table;

        }