How to determine whether an object is a file or a folder

I am trying to determine whether a given path points to a file or a directory. Currently my logic is very plain and involves the following check

if (sourcePath.Contains(".")) // then treat this path as a file 

The problem above is that folder names can have periods in them too. I would like to be able to ascertain that a given path is that of a file wit开发者_StackOverflowhout having to try and instantiate a filestream type and attempting to access it or anything like that.

Is there someway to do this?

Thanks in advance

You could use the File.Exists method:

If path describes a directory, this method returns false

So:

if (File.Exists(sourcePath))
{
    // then treat this path as a file
}

There's also the Directory.Exists method and the following example is given in the documentation:

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);
} 

C#:

public bool IsFolder(string path)
{
    return ((File.GetAttributes(path) & FileAttributes.Directory) == FileAttributes.Directory);
}

VB.Net:

Public Function IsFolder(path As String) As Boolean
    Return ((File.GetAttributes(path) And FileAttributes.Directory) = FileAttributes.Directory)
End Function

This function throws a File not found exception if the file does not exists. So you have to catch it (or use Darin Dimitrow's approach).

Try
    Dim isExistingFolder As Boolean = IsFolder(path)
    Dim isExistingFile = Not isExistingFolder 
Catch fnfEx As FileNotFoundException
    '.....
End Try 

var isDirectory = (File.GetAttributes(path) & FileAttributes.Directory) == FileAttributes.Directory;

System.IO.File.Exists("yourfilenamehere") will do the trick. This'll return false if the path isn't for a file. It'll also return false if the path doesn't exist, so be careful.

by googling, I found this:

public bool IsFolder(string path)
{
    return ((File.GetAttributes(path) & FileAttributes.Directory) == FileAttributes.Directory);
}

then you can call the function as follows:

// Define a test path
string filePath = @"C:\Test Folder\";

if (IsFolder(filePath)){
    MessageBox.Show("The given path is a folder.");
}
else {
    MessageBox.Show("The given path is a file.");
}

List<string> RtnList = new List<string>();
foreach (string Line in ListDetails)
{
    if (line.StartsWith("d") && !line.EndsWith("."))
    {
        RtnList.Add(line.Split(' ')[line.Split(' ').Length - 1] );


    }
}