Question

Assalamu＆＃39; alaikum。嗨，伙计们，当我将图像字节数据类型转换为Windows Phone中PictureBox上的图像时，我遇到了问题。它说＆＃34; InvalidCastExpection未处理＆＃34;。

这是背后的代码：

Namespace WP7_ClientApp
    Public Class ImageConverter
        Implements IValueConverter
        Public Function ubah(ByVal value As Object, ByVal targetType As Type, ByVal parameter As Object, ByVal culture As System.Globalization.CultureInfo) As Object Implements IValueConverter.Convert
            Dim memStream As New MemoryStream(CType(value, Byte()))
            memStream.Seek(0, SeekOrigin.Begin)
            Dim gambar As New BitmapImage()
            gambar.SetSource(memStream)
            Return gambar
        End Function

        Public Function ConvertBack(ByVal value As Object, ByVal targetType As Type, ByVal parameter As Object, ByVal culture As System.Globalization.CultureInfo) As Object Implements IValueConverter.ConvertBack
            Throw New NotImplementedException()
        End Function
    End Class
End Namespace

然后这是XAML代码：

 <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
            <ListBox x:Name="daftar" ItemsSource="{Binding}"  HorizontalAlignment="Left" Height="599" VerticalAlignment="Top" Width="456" Margin="12,10,0,0" Grid.Row="1">
                <ListBox.ItemTemplate>
                   <DataTemplate>
                    <StackPanel Orientation="Horizontal" >
                        <Image Height="100" Source="{Binding gambar,Converter={StaticResource ImageConverter}}" HorizontalAlignment="Left" Margin="10,10,0,0" Name="Image1" Stretch="Fill" VerticalAlignment="Top" Width="100" />
                        <TextBlock Margin="10" Text="{Binding id}"/>
                        <TextBlock Margin="10" Text="{Binding namaproduk}"/>
                        <TextBlock Margin="10" Text="{Binding hargaproduk}"/>
                        <TextBlock Margin="10" Text="{Binding keterangan}"/>
                    </StackPanel>
                   </DataTemplate>
                    </ListBox.ItemTemplate>
            </ListBox> 
        </Grid>

然后这是错误截图：http://4.bp.blogspot.com/-qWB7oKLVE-s/UfpE0jhnhsI/AAAAAAAABuo/2eNvw2AmTEk/s1600/Capture.PNG

任何人都可以解决这个问题？我会很高兴，谢谢你。

*注意：gambar数据类型是Image，它有一个字节数据类型，我的表：http://4.bp.blogspot.com/-2ZMzi32TXsg/UfpJ5RqRG6I/AAAAAAAABu4/qe81rZm1pq0/s320/Capture.PNG

Answer 1

您的对象是Binary类型，而您的转换器需要一个字节数组。不要将您的控件绑定到gambar，而是绑定到gambar.Bytes。

无法将字节转换为图像Windows Phone

1 个答案: