You can try catching the KeyDown event and select the row there if it
is the Enter that is pressed.

void dataGridView1_KeyDown(object sender, KeyEventArgs e)
{
   if (e.KeyCode == Keys.Enter)
   {
       this.dataGridView1.CurrentRow.Selected = true;
       e.Handled = true;
   }
}

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Clay Burch
Syncfusion, Inc.