拖放WPF C＃

Question

以下是我在wpf中拖放的代码。 我在windowform中使用了相同的代码来拖放图像，但是我似乎不适用于wpf，您能帮上忙吗？

 <Image Height="464" Name="PictureBox" Stretch="Uniform" Width="769"  AllowDrop="True" DragEnter="PictureBox_DragEnter" Drop="PictureBox_Drop" />


     private void PictureBox_DragEnter(object sender, DragEventArgs e)

    {
        if (e.Data.GetDataPresent(DataFormats.Bitmap, false) == true)
            e.Effects = DragDropEffects.None;
    }

    private void PictureBox_Drop(object sender, DragEventArgs e)
    {
        string[] files = (string[])e.Data.GetData(DataFormats.Bitmap);
        // images is (arraylist for multi pictures.
        if (images == null)
            images = new ArrayList();
        for (int i = 0; i < files.Length; i++)
        {
            BitmapImage bitmap = new BitmapImage();
            bitmap.BeginInit();
            bitmap.UriSource = new Uri(files[i]);
            bitmap.EndInit();
            images.Add(bitmap);               
        }
        currentPicture = images.Count;
        btn_Next_Click(sender, e);
        MessageBox.Show("images " + images.Count);
    }

Answer 1

我认为此代码不正确：

if (e.Data.GetDataPresent(DataFormats.Bitmap, false) == true)
        e.Effects = DragDropEffects.None;

检查== false。

另外，DataFormats.Bitmap具有图像类型，而不是字符串[]。

我会这样编码：

private void DragSource_MouseMove(object sender, System.Windows.Input.MouseEventArgs e)
{   
    //...
    DataObject data = new DataObject("Object", new string[]{"1", "2", "3"});
    DragDropEffects effects = DragDrop.DoDragDrop(this.draggingElement, data, DragDropEffects.Move);
    //...
}

private void PictureBox_Drop(object sender, DragEventArgs e)
{
    string[] files = (string[])e.Data.GetData("Object");
    //...
}