CODEWITHSUNDEEP
c#path
Sjoerd222888
Sjoerd222888

Reputation: 3486

How to resolve '..' in a relative path in C#

Let's say I have the following relative path as a string:

"foo/./my/../bar/file.txt"

Is there a quick way to resolve the dots (like ".." and also ".") so that the result is:

"foo/bar/file.txt"

I cannot use Uri as it is not an absolute path and I also cannot use Path.GetFullPath because this will add the path of the executing application so that I end up with:

 "C:\myAppPath\foo\bar\file.txt"

(Also it changes "/" -> "\", but I don't particularly mind this)

Upvotes: 2

Views: 2555

Answers (2)

brhardwick
brhardwick

Reputation: 3085

You could always do something like this. Does this do the trick?

        string test = "foo/./my/../bar/file.txt";

        bool temp = false;
        string result = "";
        foreach (var str in test.Split('/'))
        {
            if (str.Contains(".") & str.Count(f => f=='.') == str.Length)
            {
                if (temp == false)
                    temp = true;
                else
                    temp = false;
            }
            else
            {
                if (!temp)
                {
                    result += str + "/";

                }
            }
        }
        result = result.Substring(0, result.Length - 1);//is there a better way to do this?
        //foo/bar/file.txt

Upvotes: 1

Habib
Habib

Reputation: 223352

Just a hack, 

string path = @"foo/./my/../bar/file.txt";
string newPath = Path.GetFullPath(path).Replace(Environment.CurrentDirectory, "");

You can use Path.GetFullPath, which returns path along with Environment.CurrentDirectory, use String.Replace to remove current directory from the resolved path.

and you will end up with newPath = \foo\bar\file.txt

Upvotes: 7

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