小编use*_*235的帖子

我有以下 ListView

<ListView Name="listAccounts" Width="300" AllowDrop="True" SelectionMode="Single" CanDragItems="True" CanDrag="True" CanReorderItems="True" Background="{ThemeResource myBackground}" DragItemsStarting="listAccounts_DragItemsStarting" Drop="listAccounts_Drop">

并将我的事件处理程序定义为

private void listAccounts_DragItemsStarting(object sender, DragItemsStartingEventArgs e)
{
    e.Data.SetData("itemIndex", (e.Items[0] as AccountList).Text.ToString());
}

private async void listAccounts_Drop(object sender, DragEventArgs e)
{
    string itemIndexString = await e.Data.GetView().GetTextAsync("itemIndex");
}

我不知道还能做些什么.我想在同一个列表中实现列表项的移动.

谁能帮我。我不明白如何将BitmapImage或IRandomAccessStream转换为字节数组。我尝试：

foreach (StorageFile file in files)
{
    BitmapImage src = new BitmapImage();

    using (IRandomAccessStream stream = await file.OpenReadAsync())
    {
        await src.SetSourceAsync(stream);

        WriteableBitmap bitMap = new WriteableBitmap(src.PixelWidth, src.PixelHeight);
        await bitMap.SetSourceAsync(stream);
    }
}

然后我有WriteableBitmap并尝试以下方法：

private byte[] ImageToByeArray(WriteableBitmap wbm)
{
    using (Stream stream = wbm.PixelBuffer.AsStream())
    using (MemoryStream memoryStream = new MemoryStream())
    {
        stream.CopyTo(memoryStream);
        return memoryStream.ToArray();
    }
}

但这对我不起作用;（