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

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MainWindow.xaml

 <TextBox x:Name="textBox1" TextWrapping="Wrap" Text="TextBox" Width="120" Height="50" LostFocus="myTextBox_LostFocus"/>

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
{/// <summary>/// MainWindow.xaml 的交互逻辑/// </summary>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");}}}
}