将实例化的属性传递给第二个WPF窗口，然后在OK时返回属性

本文关键字：属性 然后 OK 窗口 返回 第二个 实例化 WPF | 更新日期: 2023-09-27 18:16:52

当用户双击窗口1中的listview项时，会弹出第二个窗口。

我想将listview项的实例传递给第二个窗口，它将用于填充GUI中的数据。当第二个窗口关闭时，它应该返回来自GUI的新值。为什么这似乎不起作用?

"双击"出错。它不允许我直接设置属性CurrentItem = selUser。我得到这个错误:

错误1 'System.Windows。Window'不包含'CurrentItem'的定义，也没有扩展方法'CurrentItem'接受类型为'System.Windows '的第一个参数。可以找到窗口(您是否缺少using指令或汇编引用?)C:'Users'jmartini'Projects'wpf_listShowSelected'WpfApplication1_setup01'WpfApplication1'MainWindow.xaml.cs 34 24 WpfApplication1

此外，我不能得到的值返回使用User val = editDialog。当对话框返回OK时，CurrentItem。我得到了与上面提到的相同的错误。

我不清楚如何解决这个问题。

WPF窗口1 (CS): 

using System;
using System.Collections.Generic;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
namespace WpfApplication1
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            List<User> items = new List<User>();
            items.Add(new User() { Name = "John Doe", Age = 42, Mail = "john@doe-family.com", Info = "A basketball player" });
            items.Add(new User() { Name = "Jane Doe", Age = 39, Mail = "jane@doe-family.com", Info = "A soccer player" });
            items.Add(new User() { Name = "Sammy Doe", Age = 13, Mail = "sammy.doe@gmail.com", Info = "A hockey player" });
            lvDataBinding.ItemsSource = items;
        }
        private void listViewItem_MouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
            ListViewItem item = sender as ListViewItem;
            // create instance of original User to use for second window
            User selUser = item.Content as User;
            // POPUP WINDOW
            Window editDialog = new EditWindow();
            editDialog.Owner = this;
            editDialog.CurrentItem = selUser;
            editDialog.ShowDialog();
            if (editDialog.DialogResult.HasValue && editDialog.DialogResult.Value)
            {
                User val = editDialog.CurrentItem;
                Console.WriteLine("User pressed OK");
            }
            else
            {
                Console.WriteLine("User pressed Cancel");
            }
        }
    }
}

WPF Window 2 (CS):

using System.Windows;
namespace WpfApplication1
{
    public partial class EditWindow : Window
    {
        public User CurrentItem {get; set;}
        public EditWindow()
        {
            InitializeComponent();
        }
        private void ButtonOkClick(object sender, RoutedEventArgs e)
        {
            DialogResult = true;
            Close();
        }
        private void ButtonCancelClick(object sender, RoutedEventArgs e)
        {
            DialogResult = false;
            Close();
        }
    }
}

将实例化的属性传递给第二个WPF窗口，然后在OK时返回属性

更改为EditWindow;

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