Question

I have a form and I want to be able to drop files on it. I have the following code:

private void Form1_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
{
    if (e.Data.GetDataPresent(DataFormats.FileDrop)) 
        e.Effect = DragDropEffects.Copy;
    else
        e.Effect = DragDropEffects.None;
}

I want the cursor to change only when I am dropping files, and not when I drop directories. The above code changes it for directories as well. What am I doing wrong? Is there any data format for files, or should I simply try to check the object I get in e.Data for extension?

Answer 1

You should check the data using File.Exists ? I think it will return true if it is a file, and false if it isn’t.

Here is an example from MSDN:

        if(File.Exists(path)) 
        {
            // This path is a file
            ProcessFile(path); 
        }               
        else if(Directory.Exists(path)) 
        {
            // This path is a directory
            ProcessDirectory(path);
        }
        else 
        {
            Console.WriteLine("{0} is not a valid file or directory.", path);
        }