How to select a row from grid view without using any button or linkbutton

Supposing the name of the datagridview is dgvGrid and Textbox name is txtName now:-

on click event of datagridview add the following code:-

if (dgvGrid.Rows.Count > 0 &  dgvGrid.CurrentRow.Index>=0)
           {
              
               if (dgvGrid.Rows[dgvGrid.CurrentRow.Index].Cells[dgvGrid.CurrentCell.ColumnIndex].Value != null)
               {
                   txtName.Text = dgvGrid.Rows[dgvGrid.CurrentRow.Index].Cells[dgvGrid.CurrentCell.ColumnIndex].Value.ToString();
               }
           }