The method executes twice in a row and there's no apparent reason for doing so. It happens in VS2010 Express (4.0) and in VS2008 (3.5).
public GUI()
{
InitializeComponent();
this.lvwFiles.DragDrop += new System.Windows.Forms.DragEventHandler(this.lvwFiles_DragDrop);
this.lvwFiles.DragEnter += new System.Windows.Forms.DragEventHandler(this.lvwFiles_DragEnter);
}
private void lvwFilesAdd(string path, string[] paths)
{ ... }
private void lvwFilesWrite()
{ ... }
private void lvwFiles_DragEnter(object sender, DragEventArgs e)
{
if (e.Data.GetDataPresent(DataFormats.FileDrop))
e.Effect = DragDropEffects.Copy;
else
e.Effect = DragDropEffects.None;
}
private void lvwFiles_DragDrop(object sender, DragEventArgs e)
{
if (e.Data.GetDataPresent(DataFormats.FileDrop))
{
var paths = (string[])e.Data.GetData(DataFormats.FileDrop);
var path = Path.GetDirectoryName(paths[0]);
lvwFilesAdd(path, paths);
lvwFilesWrite();
}
}
I was following Microsoft example and didn't notice that the declarations in GUI.Designer.cs (automatic, by IDE) and in GUI.cs (manual, from example) are redundant.
=== GUI.cs ===
public GUI()
{
InitializeComponent();
this.lvwFiles.DragDrop += new System.Windows.Forms.DragEventHandler(this.lvwFiles_DragDrop);
this.lvwFiles.DragEnter += new System.Windows.Forms.DragEventHandler(this.lvwFiles_DragEnter);
}
=== GUI.Designer.cs ===
//
// lvwFiles
//
...
this.lvwFiles.DragDrop += new System.Windows.Forms.DragEventHandler(this.lvwFiles_DragDrop);
this.lvwFiles.DragEnter += new System.Windows.Forms.DragEventHandler(this.lvwFiles_DragEnter);
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With