Which is best event to handle button click event in datagridview

you can use CellContentClick event

private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
var senderGrid = (DataGridView)sender;
if (senderGrid.Columns[e.ColumnIndex] is DataGridViewButtonColumn &&
e.RowIndex >= 0)
{
// Button Clicked - Execute your Code Here
}
}

or you can try this way.

private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
if (e.Control is Button)
{
Button button = e.Control as Button;
button.Click -= new EventHandler(DGVbutton_Click);
button.Click += new EventHandler(DGVbutton_Click);
}
}
private void DGVbutton_Click(object sender, EventArgs e)
{
int row = this.dataGridView1.CurrentCell.RowIndex;
int col = this.dataGridView1.CurrentCell.ColumnIndex;
MessageBox.Show("Button in Cell[" +
col.ToString() + "," +
row.ToString() + "] has been clicked");
}

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