限制TextBox只能输入整数,而且整数的数值范围为0-100。如果输入101后,弹窗提示输入超限
MainWindow.xaml
MainWindow.xaml.cs
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; namespace NumRange2 { ////// MainWindow.xaml 的交互逻辑 /// public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); } private void myTextBox_LostFocus(object sender, RoutedEventArgs e) { // 在这里添加你的处理代码 string textVal = textBox1.Text; try { int numVal = int.Parse(textVal); if (numVal > 100 || numVal < 0) { MessageBox.Show("输入超限"); } } catch(Exception ex) { MessageBox.Show("请输入一个整数"); } } } }