绑定到 ItemsSource 的实例

发布于 2024-12-06 18:40:30 字数 1646 浏览 0 评论 0 原文

我在 WPF 用户控件上有一个 ListBox，定义为

<ListBox Grid.Row="1" ScrollViewer.CanContentScroll="False" Background="#00000000" BorderThickness="0" ItemsSource="{Binding BuyItNowOptions}"
                                           ItemTemplate="{DynamicResource BuyItNowDataTemplate}" IsSynchronizedWithCurrentItem="True"
                                           Style="{DynamicResource InheritEmptyListStyle}" SelectedItem="{Binding SelectedResearch}" ItemContainerStyle="{DynamicResource ListBoxItemStyle}"/>

BuyItNowOptions 是 ViewModel 上的一个公共属性，其类型为 ObservableCollection

在 BuyItNowDataTemplate 中，我有一个标签，需要在显示价格之前执行一些逻辑。

<Label Padding="1" HorizontalContentAlignment="Stretch" Grid.Column="2" Grid.Row="2" Margin="1">
                    <TextBlock Text="{Binding ExchangePrice, StringFormat=C}"
                        Visibility="{Binding ReturnRequired, Converter={StaticResource BooleanToVisibilityConverter}}"/>
                </Label>

这里的绑定表明它将使用它所在的 AutoResearchProxy 实例的 ExchangePrice 属性，例如 BuyItNowOptions[CurrentIndex].ExchangePrice。

我想知道是否可以以引用 AutoResearchProxy 的整个实例的方式创建绑定，以便我可以将其传递给转换器并操作 AutoResearchProxy 的多个属性并返回计算出的价格？

我想象我的转换器看起来像这样。

public class PriceConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter,        System.Globalization.CultureInfo culture)
{
  if (value is AutoResearchProxy)
  {
    var research = value as AutoResearchProxy;
    //Some logic to figure out actual price

  }
  else
    return String.Empty;
}

希望这是有道理的。

原文

I have a ListBox on a WPF User Control that is defined as

<ListBox Grid.Row="1" ScrollViewer.CanContentScroll="False" Background="#00000000" BorderThickness="0" ItemsSource="{Binding BuyItNowOptions}"
                                           ItemTemplate="{DynamicResource BuyItNowDataTemplate}" IsSynchronizedWithCurrentItem="True"
                                           Style="{DynamicResource InheritEmptyListStyle}" SelectedItem="{Binding SelectedResearch}" ItemContainerStyle="{DynamicResource ListBoxItemStyle}"/>

BuyItNowOptions is a public property on the ViewModel that is of type ObservableCollection

In the BuyItNowDataTemplate I have a label that needs to have some logic performed before displaying a price.

<Label Padding="1" HorizontalContentAlignment="Stretch" Grid.Column="2" Grid.Row="2" Margin="1">
                    <TextBlock Text="{Binding ExchangePrice, StringFormat=C}"
                        Visibility="{Binding ReturnRequired, Converter={StaticResource BooleanToVisibilityConverter}}"/>
                </Label>

The binding here indicates that it will use the ExchangePrice property of the instance of AutoResearchProxy that it is on like BuyItNowOptions[CurrentIndex].ExchangePrice.

What I would like to know is it possible to create the binding in such a way that it references the whole instance of the AutoResearchProxy so that I can pass it to a converter and manipulate several properties of the AutoResearchProxy and return a calculated price?

I would envision my converter looking like this.

public class PriceConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter,        System.Globalization.CultureInfo culture)
{
  if (value is AutoResearchProxy)
  {
    var research = value as AutoResearchProxy;
    //Some logic to figure out actual price

  }
  else
    return String.Empty;
}

Hopefully this makes sense.

分享到QQ

分享到微博