Question

我将对象直接添加到ListBox，在这个类中，我有一个BitmapImage对象。我正在使用ItemTemplate：

<ListBox.ItemTemplate>
    <DataTemplate>
        <StackPanel>
            <Image Source="{Binding Path=ElementIcon}"></Image>
            <TextBlock Text="{Binding Path=ElementName}"/>
        </StackPanel>
    </DataTemplate>
</ListBox.ItemTemplate>

我直接添加了这个类的对象：

Public Class ExplorerClass
    Implements INotifyPropertyChanged
    Public Property ElementType As String = Nothing
    Public Property ElementName As String = Nothing
    Public Property ElementContainer As String = Nothing
    Public Property ElementIcon As New BitmapImage
    Public Event PropertyChanged As PropertyChangedEventHandler Implements INotifyPropertyChanged.PropertyChanged
    Private Sub NotifyPropertyChanged(ByVal info As String)
        RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(info))
    End Sub

    Public Sub New(ByVal WantedElementContainer As String, ByVal WantedElementName As String, ByVal WantedElementType As String)
        ElementType = WantedElementType
        ElementName = WantedElementName
        ElementContainer = WantedElementContainer
        Dim str As New MemoryStream
        Dim IWorking As Icon = showIcon(ElementName.Substring(ElementName.LastIndexOf(".")))
        IWorking.ToBitmap.Save(str, System.Drawing.Imaging.ImageFormat.Png)
        ElementIcon.BeginInit()
        ElementIcon.StreamSource = str
        ElementIcon.EndInit()
        NotifyPropertyChanged("ElementIcon")
    End Sub
End Class

但是，没有图片显示; 所以，我的问题是：“如何绑定BitmapImage”？

Answer 1

看起来您没有实施INotifyPropertyChanged Interface。看看this page on MSDN。我不确定这是否也是一个问题，但请尝试设置图像的高度和宽度。

直接绑定在WPF中绑定到ListBox的类中创建的BitmapImage，可能吗？

1 个答案: