C# - FileStream and creating folders

Question

Hi everyone

Just a quick question. I'm using something like this

FileStream fs = new FileStream(fileName, FileMode.Create);

I was wondering whether there was a parameter I could pass to it to force it to create the folder if it doesn't exist. At the moment an exception is throw if folder isn't found.

If there is a better method then using FileStream I'm open to ideas.

Thank you in advance.

Answer 1

You can use the File.Exists() method to see if the file exists or not, then use the appropriate enumeration, depending on the result of the Exists method. There is a small example available here.

Answer 2

Use Directory.CreateDirectory:

Directory.CreateDirectory Method (String)

Creates all directories and subdirectories as specified by path.

Example:

string fileName = @"C:\Users\SomeUser\My Documents\Foo\Bar\Baz\text1.txt";

Directory.CreateDirectory(Path.GetDirectoryName(fileName));

using (FileStream fs = new FileStream(fileName, FileMode.Create))
{
    // ...
}

(Path.GetDirectoryName returns the directory part of the file name.)

Answer 3

Something like:

void EnsureFolder(string path)
{
    string directoryName = Path.GetDirectoryName(path);
    if ((directoryName.Length > 0) && (!Directory.Exists(directoryName))
    {
        Directory.CreateDirectory(directoryName);
    }
}