How can I restrict a user to entering only numeric values in a specific cell in a DataGridView column?

Question

I have a DataGridView control in which I want to restrict the user to entering only numeric values for a cell under a particular column. How can I accomplish this t

Answer 1

• Add an event of EditingControlShowing
• In EditingControlShowing, check that if the current cell lies in the desired column.
• Register a new event of KeyPress in EditingControlShowing(if above condition is true).
• Remove any KeyPress event added previously in EditingControlShowing.
• In KeyPress event, check that if key is not digit then cancel the input.

Example:

private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
        {
            e.Control.KeyPress -= new KeyPressEventHandler(Column1_KeyPress);
            if (dataGridView1.CurrentCell.ColumnIndex == 0) //Desired Column
            {
                TextBox tb = e.Control as TextBox;
                if (tb != null)
                {
                    tb.KeyPress += new KeyPressEventHandler(Column1_KeyPress);
                }
            }
        }

private void Column1_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (!char.IsControl(e.KeyChar)
                && !char.IsDigit(e.KeyChar))
            {
                e.Handled = true;
            }
        }