How do I delete a row if the user selected the row header?

Question

private void deleteRowButton(object sender, EventArgs e)
{

    if (dataGridView1.SelectionMode == DataGridViewSelectionMode.RowHeaderSelect)
    {
        dataGridView1.Rows.RemoveAt(dataGridView1.CurrentCell.RowIndex);
    }
}

So this is what I've tried. Now without the if statement it would work but it will delete the row on the selected cell. I don't want the user to accidentally delete it. How do I make it so that it can delete the row if the user selects the row header?

Like this:

Answer 1

You could subscribe to the CellClick event and test the value e.ColumnIndex:

if (e.ColumnIndex == -1)
{
    dataGridView1.Rows.RemoveAt(e.RowIndex);
}

Or you could subscribe to the CellDoubleClick event (using the same code) if you wanted to be a little more sure they didn't accidentally delete rows.

---

Since you have a button you want to use, I'd say try this:

if (dataGridView1.CurrentRow != null && dataGridView1.CurrentCell.ColumnIndex == -1)
{
    dataGridView1.Rows.RemoveAt(dataGridView1.CurrentRow.Index);
}

But for some reason, it always returns 0 for CurrentCell.ColumnIndex, even if you selected the row header.

I suppose you could still subscribe to the CellClick event, but just store the current row index in a class-level variable that you can test in the button:

private bool isRowHeaderSelected = false;

private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
    isRowHeaderSelected = (e.ColumnIndex == -1);
}

private void deleteRowButton(object sender, EventArgs e)
{
    if (isRowHeaderSelected)
        dataGridView1.Rows.RemoveAt(dataGridView1.CurrentCell.RowIndex);
}

Answer 2

I am guessing that you are writing winforms. Why don't you put the delete behind a messageBox? What datagridview event are you putting this under?

if (e.ColumnIndex == -1)
{
      DialogResult dr = MessageBox.Show("Are you sure that you want to delete", "Are you sure?", MessageBoxButtons.YesNo);
      if (dr == DialogResult.Yes)
      {
          dataGridView1.Rows.RemoveAt(dataGridView1.Rows[e.RowIndex]);
      }
}