不带通配符的 DirectoryInfo GetFiles

Question

DirectoryInfo source = new DirectoryInfo(src);
DirectoryInfo destination = new DirectoryInfo(dest);

FileInfo[] files = source.GetFiles("myfile.mp3);

is using DirectoryInfo GetFiles without "*" in the parameter ok? This would just get 1 file everytime?

Answer 1

Your code will only retrieve all files with the exact name that you provide. So if you use a wildcard like this:

FileInfo[] files = source.GetFiles("myfile.*");

then all files named "myfile" of any file type will now be in your file array.

You can test that this is using the single file you enumerated without a wildcard by running the code here (replacing directories as needed):

DirectoryInfo source = new DirectoryInfo(@"C:\Users\admin\Documents");

FileInfo[] files = source.GetFiles("myfile.mp3");
foreach (FileInfo file in files)
{
    Console.WriteLine(file.Length);
}

This will write a single line to the console if "myfile.mp3" exists in the Documents directory of the Admin account, or it will do nothing if the file does not exist because the foreach section will act upon nothing.