验证合法输入，数字和小数点

private void textBoxLength_KeyPress(object sender, KeyPressEventArgs e) { if ((char.IsDigit(e.KeyChar)) || (e.KeyChar == 46) || (e.KeyChar == 8))//验证合法输入 （.0123456789） e.Handled = false; else e.Handled = true; }

转载于:https://www.cnblogs.com/wuenping/archive/2010/05/03/1726253.html