How can I restrict a particular datagridview cell to number only?

private void dtgView_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
        {
            if (this.dtgView.CurrentCell.ColumnIndex == dtgView.Columns["Column2"].Index & (e.Control != null))
            {
                TextBox tb = (TextBox)e.Control;
                tb.KeyPress += TextBox_KeyPress;
            }
        }

private void TextBox_KeyPress(System.Object sender, System.Windows.Forms.KeyPressEventArgs e)
        {
            //---if textbox is empty and user pressed a decimal char---
            if (((TextBox)sender).Text == string.Empty & e.KeyChar == (char) 46)
            {
                e.Handled = true;
                return;
            }
            //---if textbox already has a decimal point---
            if (((TextBox)sender).Text.Contains(Convert.ToString((char)46)) & e.KeyChar == (char)46)
            {
                e.Handled = true;
                return;
            }
            //if (!(char.IsDigit(e.KeyChar).ToString() ==","))
            if (!(e.KeyChar == 44) & !(e.KeyChar == 45))
            {
                if ((!(char.IsDigit(e.KeyChar) | char.IsControl(e.KeyChar) | (e.KeyChar == (char)46))))
                {
                    e.Handled = true;
                }
            }
        }