Display before any row using "Button"

Question

Hi,

 

I was writing these codes to display the before any row. For example:

 

Samia

Alam

Shell

 

Then when I click on "Shell" its display on textbox "Alam". If I click on "Alam" its display "Samia".

 

These codes work perfectly using the datagrid. How can I do using Button.

private void DGVTest_CellClick(object sender, EventArgs e)
{
if (e.RowIndex == 0)
{
lblID.Text = string.empty;
txtName.Text = string.empty;
}
else if (e.RowIndex >= 1)
{
DataGridViewRow row = this.dgvTest.Rows[e.RowIndex - 1];
if (row != null)
{
lblID.Text = row.Cells["id"].Value.ToString();
txtName.Text = row.Cells["name"].Value.ToString();
}
}