Question

我的最终目标是将以下代码从C＃转换为IronPython（来源：https://wpf-tutorial.com/data-binding/responding-to-changes/）：

using System;
using System.Collections.Generic;
using System.Windows;
namespace WpfTutorialSamples.DataBinding
{
    public partial class ChangeNotificationSample : Window
    {
        private List<User> users = new List<User>();

        public ChangeNotificationSample()
        {
            InitializeComponent();

            users.Add(new User() { Name = "John Doe" });
            users.Add(new User() { Name = "Jane Doe" });

            lbUsers.ItemsSource = users;
        }

        private void btnAddUser_Click(object sender, RoutedEventArgs e)
        {
            users.Add(new User() { Name = "New user" });
        }

        private void btnChangeUser_Click(object sender, RoutedEventArgs e)
        {
            if(lbUsers.SelectedItem != null)
                (lbUsers.SelectedItem as User).Name = "Random Name";
        }

        private void btnDeleteUser_Click(object sender, RoutedEventArgs e)
        {
            if(lbUsers.SelectedItem != null)
                users.Remove(lbUsers.SelectedItem as User);
        }
    }

    public class User
    {
        public string Name { get; set; }
    }
}

相关的XAML：

<ListBox Name="lbUsers" DisplayMemberPath="Name"></ListBox>

到目前为止，这是我使用http://palepoli.skr.jp/wp/2009/06/28/wpf-listview-databinding-for-ironpython/中的信息得出的结论：

import wpf
from System import *
from System.Collections.Generic import *
from System.Windows import *
from System.Windows.Controls import *
from System.Windows.Data import *
from System.ComponentModel import *
from System.Collections.ObjectModel import *

from System.Windows import Application, Window

class NotifyPropertyChangedBase(INotifyPropertyChanged):
    PropertyChanged = None
    def __init__(self):
        (self.PropertyChanged, self._propertyChangedCaller) = make_event()

    def add_PropertyChanged(self, value):
        self.PropertyChanged += value

    def remove_PropertyChanged(self, value):
        self.PropertyChanged -= value

    def OnPropertyChanged(self, propertyName):
        self._propertyChangedCaller(self, PropertyChangedEventArgs(propertyName))


class User(NotifyPropertyChangedBase):

    @property
    def Name(self):
        return self._Name

    @Name.setter
    def Name(self, value):
        self._Name = value
        self.OnPropertyChanged("Name")





class MyWindow(Window):


    def __init__(self):
        wpf.LoadComponent(self, 'WpfApplication1.xaml')

        self.users = ObservableCollection[User]()

        temp = User()
        temp.Name = "Test"
        self.users.Add(temp)


        lbUsers.ItemsSource = users




if __name__ == '__main__':
    Application().Run(MyWindow())

但是，此代码在创建“ self.users”对象时崩溃。我发现，如果我初始化使用STR的ObservableCollection做出添加功能的XAML中的DisplayMemberPath和输入适当的修改，代码运行良好，但我感兴趣的是使用自定义类。从我在网上看到的各种物品，似乎没有要使用ItemsSources和中的ObservableCollection IronPython的共识，所以我希望有人能够帮助我澄清在我的问题。

设置在IronPython的一个ListBox中使用自定义类的ItemsSource

0 个答案: