Registration, cancellation and modification program

Google Translate:

I am doing a high, low and modification program in c #.
I need that through a cellclick event of a DataGridView the fields that I have are completed.

private void dgvproductos_CellClick(object sender, DataGridViewCellEventArgs e)
{
    id = dgvproductos.CurrentRow.Cells[0].Value.ToString();
    autocompletar();

 }

Google Translate:

The comboBox is called cbxcategory

foreach (DataRow fila in consulta.Rows)
{
    txbnombre.Text = fila[1].ToString();
    txbcodigo.Text = fila[0].ToString();
    txbprecio.Text = fila[2].ToString();
    cbxcategoria =
}

Google Tr:

I need to know how to load the data to the comboBox