Question

I have a DataGridView. I want its 1st column or any desired column (which has textboxes in it) to be NUMERIC ONLY. I am currently using this code:

private void dataGridViewItems_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
        {
            if (dataGridViewItems.CurrentCell.ColumnIndex == dataGridViewItems.Columns["itemID"].Index)
            {
                TextBox itemID = e.Control as TextBox;
                if (itemID != null)
                {
                    itemID.KeyPress += new KeyPressEventHandler(itemID_KeyPress);
                }
            }
        }

private void itemID_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (!char.IsControl(e.KeyChar)
                && !char.IsDigit(e.KeyChar))
            {
                e.Handled = true;
            }
        }

This code works but the problem is that all the textboxes in all the columns are getting numeric only.

Answer 1

I figured it out myself 🙂

Just removed the previous events in the starting of the function which resolved my issue.

private void dataGridViewItems_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
        {
            e.Control.KeyPress -= new KeyPressEventHandler(itemID_KeyPress);//This line of code resolved my issue
            if (dataGridViewItems.CurrentCell.ColumnIndex == dataGridViewItems.Columns["itemID"].Index)
            {
                TextBox itemID = e.Control as TextBox;
                if (itemID != null)
                {
                    itemID.KeyPress += new KeyPressEventHandler(itemID_KeyPress);
                }
            }
        }

private void itemID_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (!char.IsControl(e.KeyChar)
                && !char.IsDigit(e.KeyChar))
            {
                e.Handled = true;
            }
        }