Question

I have a button column on a DataGridView and I am trying to handle a Button.Click event but nothing happens when I click a button. Any help?

private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
    MessageBox.Show(e.ColumnIndex.ToString());
    if (e.ColumnIndex == 5)
    {
        MessageBox.Show((e.RowIndex + 1) + "  Row  " + (e.ColumnIndex + 1) + "  Column button clicked ");
    }
}

Answer 1

I have tried your sample and it works. Did you really bind the event to your DataGridView ?

Please check the InitializeComponent() Method in your <YourFormName>.Designer.cs class.
Did it really has

this.dataGridView1.CellClick += 
  new System.Windows.Forms.DataGridViewCellEventHandler(this.dataGridView1_CellClick);

and you don’t remove the handler at another place in code ?

The DataGridViewButtonColumn MSDN page has this to say:

To respond to user button clicks, handle the DataGridView.CellClick or DataGridView.CellContentClick event. In the event handler, you can use the DataGridViewCellEventArgs.ColumnIndex property to determine whether the click occurred in the button column. You can use the DataGridViewCellEventArgs.RowIndex property to determine whether the click occurred in a button cell and not on the column header.