Create matrix (line header) in Datagridview

Question

Would you somehow in C# use this pointed column of the image to add value to it as if it were a "header"?

I’m using the DataGridView below to show an array. The matrix header is already being shown in the columns because I can use:

gridView.Columns.Add("string", "header");

Answer 1

That really is a line header (Row header) and it is perfectly possible to add values to it.

All you have to do is use the property HeaderCell of the line.

private void SetarCabecalhoLinha(DataGridView dgv)
{
    foreach (DataGridViewRow linha in dgv.Rows)
    {
        linha.HeaderCell.Value = (linha.Index + 1).ToString();
    }
}