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我目前正在学习如何使用 WPF，但我遇到了一个问题。所以我设置了 3 个窗口 MainWindow、IncomeWindow 和 RentWindow，我的目标是在文本框（Inside IncomeWindow）中输入我的 GrossIncome 值，然后在我单击租金窗口内的按钮时获取该值并输出它。我的导航工作正常，但我不确定如何将值从一个窗口链接到另一个窗口。

主窗口内的代码：

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 PROGPOE
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void OpenWindow(object sender, RoutedEventArgs e)
        {

            IncomePage f1 = new IncomePage();
            this.Visibility = Visibility.Hidden;
            f1.Show();

        }
    }
}

收入窗口代码：

namespace PROGPOE
{
    /// <summary>
    /// Interaction logic for IncomePage.xaml
    /// </summary>
    /// 

    

    public partial class IncomePage : Window
    {

        public string gross;
       
        public IncomePage()
        {
            InitializeComponent();
        }

        private void OpenWindow(object sender, RoutedEventArgs e)
        {
            MainWindow f2 = new MainWindow();
            this.Visibility = Visibility.Hidden;
            f2.Show();


        }

        public void ButtonClicked(object sender, RoutedEventArgs e)
        {

            Expense f3 = new Expense();
            this.Visibility = Visibility.Hidden;
            f3.Show();



            //MainClass x = new MainClass();
            //x.Income = Convert.ToDouble(textIncome.Text);
            //MessageBox.Show(x.Income.ToString(), "Results");

            gross = textIncome.Text;
            MessageBox.Show(gross, "Results");
        }

        private void TextBox_TextChanged(object sender, TextChangedEventArgs e)
        {

        }
    }
}

租风：

namespace PROGPOE
{
    /// <summary>
    /// Interaction logic for Rent.xaml
    /// </summary>
    public partial class Rent : Window
    {
        public Rent()
        {
            InitializeComponent();
        }

        private void OpenWindow(object sender, RoutedEventArgs e)
        {
            MainWindow f2 = new MainWindow();
            this.Visibility = Visibility.Hidden;
            
            f2.Show();
        }

        private void ButtonClicked(object sender, RoutedEventArgs e)
        {
            Car c1 = new Car();


            IncomePage i1 = new IncomePage();
            
            MainClass x = new MainClass();

            i1.gross = textIncome.Text;
           
            MessageBox.Show(i1.gross, "Results");









        }

        private void Rent1_TextChanged(object sender, TextChangedEventArgs e)
        {
            
        }
    }
}

我已将值的输出链接到我的 RentXaml 中的按钮。当我运行它并单击结果时，我得到一个输出 0 同时我会在我的收入页面中输入一个更大的数字。

我将如何处理这个问题？

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