问个C# DataGridView的，怎样选中CheckBox

[mohugomohu]

        private void dgvTopMenu_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
        {
            if (e.ColumnIndex == dgvTopMenu.Columns["IsCheckedCol"].Index)
            {
                string UserGroupID = Convert.ToString(
                    dgvTopMenu.Rows[e.RowIndex].Cells["UserGroupIDCol"].Value);
                if (!string.IsNullOrEmpty(UserGroupID))
                {
                    DataGridViewCheckBoxColumn o = dgvTopMenu.Rows[e.RowIndex].Cells["IsCheckedCol"] as DataGridViewCheckBoxColumn;
//怎么没有Checked属性
                }
            }
        }

[mohugomohu]

怎么用代码勾选CheckBox

[窗户纸]

string UserGroupID = Convert.ToString(
dgvTopMenu.Rows[e.RowIndex].Cells["UserGroupIDCol"].Value);
改为 bool rst= (bool)dgvTopMenu.Rows[e.RowIndex].Cells[e.ColumnIndex].value;