摘要：
private void txt_KeyPress(object sender, KeyPressEventArgs e) { byte keyValue = (byte)e.KeyChar;//获取键盘按键的对应ASCII码 if ((keyValue < 48 || keyValue > 57) && keyValue != 8 && keyValue != 127)//数字之外的码不作处理，除去退格键及删除键 { e.Handled = true; } } 阅读全文