如何随后更新单选按钮

Question

我正在循环浏览我的数据库项目，我正在显示样式单选按钮，这是我的代码：

public ObservableCollection<Product> products = new ObservableCollection<Product>(ProductsController.SelectAllProducts());

if (products.Count > 0)
{
    foreach(var item in products)
    {
        SolidColorBrush mySolidColorBrush = new SolidColorBrush();
        mySolidColorBrush = (SolidColorBrush)(new BrushConverter().ConvertFrom("#004a80"));
        RadioButton a = new RadioButton();
        a.BorderThickness = new Thickness(1);
        a.Background = Brushes.Green;
        a.Foreground = new SolidColorBrush(Colors.Black);
        a.BorderBrush = mySolidColorBrush;
        a.Width = 118;
        a.Height = 70;
        a.Margin = new Thickness(5,0,0,5);
        Style style = Application.Current.Resources["MyRadioButtonAsButtonStyle"] as Style;
        a.Style = style;
        a.ApplyTemplate();
        a.Content = item.OrdinalNumber;
        Image imgControl = (Image)a.Template.FindName("img", a);
        Image imgControlWhite = (Image)a.Template.FindName("whiteImg", a);
        TextBlock text = (TextBlock)a.Template.FindName("text", a);
        a.Click += (object sender, RoutedEventArgs e) =>
        {
            var radioButton = sender as RadioButton;
            MessageBox.Show(radioButton.Content.ToString());
        };
        text.Text = item.Title;
        imgControl.Source = image;
        spProducts.Children.Add(a);
    }
}

在我的课程开始时，我从 Db 获得所有产品，并且我创建了与产品一样多的单选按钮，它看起来像这样：

如果 products.Count 为 8，我们将看到 8 个单选按钮，它们的样式为按钮：

虽然我想更改单选按钮上的背景颜色或标题，但我不想刷新整个屏幕，所以我添加了INotifyPropertyChanged，产品是Product 类型的列表，如下所示：

public class Product : INotifyPropertyChanged
{
    #region Attributes
    private string _ordinalNumber;
    private string _title;
    private string _description;
    #endregion

    #region Properties
    public string OrdinalNumber
    {
        get { return _ordinalNumber; }
        set { _ordinalNumber = value; NotifyPropertyChanged("OrdinalNumber"); }
    }
    public string Title
    {
        get { return _title; }
        set { _title = value; NotifyPropertyChanged("Title"); }
    }
    public string Description
    {
        get { return _description; }
        set { _description = value; NotifyPropertyChanged("Description"); }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    private void NotifyPropertyChanged(String propertyName = "")
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}

在同一文件的代码中的某处，我尝试修改标题：

var dbProduct = ProductController.Instance.GetProductByTitle(title);

var listItem = products.FirstOrDefault(x => x.OrdinalNumber == dbProduct.OrdinalNumber);
listItem.Title = "Test";

但是什么也没发生，我想因为 products 是创建单选按钮的来源，所以如果我更改该列表中某些项目的 Title，它会影响屏幕上的单选按钮，因为我正在使用 Title 道具当我显示单选按钮文本时。

任何形式的帮助都会很棒。

Answer 1

您需要为要在 UI 中跟踪的更改创建绑定。像这样的：

而不是 -

text.Text = item.Title;

有这个-

Binding binding = new Binding("Title");
binding.Source = item;
BindingOperations.SetBinding(text, TextBlock.TextProperty, binding);