WPF通过出生日期计算年龄/MainWindow.xaml.cs

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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 WPF通过出生日期计算年龄
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void DteBirthday_PreviewKeyDown(object sender, KeyEventArgs e)
        {
            Console.WriteLine("Hello");
            if (e.Key == Key.Enter)
            {
                try
                {
                    //dteBirthday为空时跳出
                    DateTime dateTime = (DateTime)dteBirthday.SelectedDate.Value;
                }
                catch (Exception)
                {

                    return;
                }


                DateTime now = DateTime.Now;//当前时间用于对比

                if (dteBirthday.SelectedDate > DateTime.Now)
                {
                    MessageBox.Show("出生日期不能大于当前时间");
                    return;
                }

                int age = now.Year - dteBirthday.SelectedDate.Value.Year;//计算年龄
                if (age > 1)
                {
                    if ((now.Month > dteBirthday.SelectedDate.Value.Month) || (now.Month == dteBirthday.SelectedDate.Value.Month && now.Day >= dteBirthday.SelectedDate.Value.Day))
                    {
                        tbAge.Text = age.ToString();
                        cbAge.SelectedIndex = 0;
                    }