C# DataGridView set focus on a row instead of cell when hit TAB

Question

I have a winforms datagridview, when I hit TAB, the focus rectangle (dotted rectangle) sets to a cell and starts moving from cell to cell as I keep hitting the button, instead I want the rectangle to be set to the entire row not just the cell and once I start hitting TAB it should move from row to row .

I have tried setting the selctionmode to fullrowselect but still the focus sets for cell.

Can you please suggest me any workaround to achieve the objective here. Thanks!

Answer 1

You can use with SelectionMode as FullRowSelect the datagridview s KeyDown event such as

private void dataGridView1_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Tab)
    {
        int activeRow = dataGridView1.CurrentCell.RowIndex;
        if ((activeRow + 1) < dataGridView1.RowCount)
        {
            dataGridView1.CurrentCell = dataGridView1.Rows[activeRow+1].Cells[0];
        }
    }
}

Also for selection rectangle you can add in the CellPainting event the folowing code

void dataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
    {
        if (e.ColumnIndex == this.dataGridView1.CurrentCell.ColumnIndex
            && e.RowIndex == this.dataGridView1.CurrentCell.RowIndex)
        {
            e.Paint(e.CellBounds, DataGridViewPaintParts.All& ~DataGridViewPaintParts.Border);
            using (Pen p = new Pen(Color.Black, 0))
            {
                Rectangle rect = e.CellBounds;
                rect.Width -= 2;
                rect.Height -= 2;
                e.Graphics.DrawRectangle(p, rect);
            }
            e.Handled = true;
        }
    }

Answer 2

Try This.,

Using Tab:

dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;

Using Mouseclick:

dataGridView1.SelectionMode = DataGridViewSelectionMode.RowHeaderSelect;