Datagridview forcing only one checkbox to be selected in a column

Question

How do I force only a single checkbox to be checked in a column of a Datagridview?

Answer 1

private void dgvlist_CellContentClick(object sender, DataGridViewCellEventArgs e)  
    {  
        int currentcolumnclicked = e.ColumnIndex;  
        for (int i = 0; i <= dgvlist.Columns.Count - 1; i++)  
        {  
            if (dgvlist.Columns[i] is DataGridViewCheckBoxColumn)  
            {  
                if (Convert.ToString(dgvlist.CurrentRow.Cells[i].EditedFormattedValue) == "True" && i !=currentcolumnclicked)  
                {  
                    dgvlist.CurrentRow.Cells[i].Value = false;  
                }  
            }  
        }  
    }