private bool OnCanDrop(DragEventArgs e)
{
var fs = e.Data.GetFormats();
if (e.Data.GetDataPresent(DataFormats.FileDrop))
{
var names = (string[])e.Data.GetData(DataFormats.FileDrop);
var dropFiles = (names ?? new string[0]).Select(i => new DropFile(i, Stream.Null)).ToList();
var result = DropCommand != null && DropCommand.CanExecute(dropFiles);
foreach (var file in dropFiles)
{
file.Content.Dispose();
}
return(result);
}
else if (e.Data.GetDataPresent("FileGroupDescriptorW"))
{
var data = new InputFileDataObject(e.Data);
var names = (string[])data.GetData("FileGroupDescriptorW");
var dropFiles = (names ?? new string[0]).Select(i => new DropFile(i, Stream.Null)).ToList();
var result = DropCommand != null && DropCommand.CanExecute(dropFiles);
foreach (var file in dropFiles)
{
file.Content.Dispose();
}
return(result);
}
else
{
return(false);
}
}
private IEnumerable <IDropFile> GetFiles(InputFileDataObject data)
{
var names = (string[])data.GetData("FileGroupDescriptorW");
var streams = (MemoryStream[])data.GetData("FileContents");
for (int i = 0; names != null && streams != null && i < names.Length; i++)
{
yield return(new DropFile(names[i], streams[i]));
}
}
private void AssociatedObjectOnDrop(object sender, DragEventArgs e)
{
if (e.Data.GetDataPresent(DataFormats.FileDrop))
{
var names = (string[])e.Data.GetData(DataFormats.FileDrop);
DropCommand.Execute(GetFiles(names));
e.Handled = true;
}
else if (e.Data.GetDataPresent("FileGroupDescriptorW"))
{
var data = new InputFileDataObject(e.Data);
DropCommand.Execute(GetFiles(data));
e.Handled = true;
}
}
