How can Path.Combine be used with more than two arguments?

Question

I\'m surprised there\'s not an overload that can take a string array. Anyway, what is the best way to avoid nesting calls to Path.Combine?

pathValue = Path.Combi         


        

Answer 1

It's pretty straightforward to implement it yourself:

public string Combine(params string[] paths)
{
    char[] pathSeparators = new char[] 
        { Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar, Path.VolumeSeparatorChar };

    if(paths == null) throw new ArgumentNullException("paths");
    if(paths.Length == 1) return paths[0];

    StringBuilder pathBuilder = new StringBuilder();

    foreach(string path in paths)
    {
        if(Path.IsPathRooted(path))
            pathBuilder = new StringBuilder(path);
        else
        {
            char last = pathBuilder.Length > 0 ?
                pathBuilder[pathBuilder.Length - 1] :
                path[path.Length - 1];

            if(Array.IndexOf(pathSeparators, last) == -1)
                pathBuilder.Append(Path.DirectorySeparatorChar);

            pathBuilder.Append(path);
        } // else
    } // foreach

    return pathBuilder.ToString();
}

[Test()]
public void CombinePaths()
{
    string result = Combine(@"C:\Program Files\", @"Microsoft.NET", @"ADOMD.NET\", "90", "msadomdx.dll");
    Assert.AreEqual(@"C:\Program Files\Microsoft.NET\ADOMD.NET\90\msadomdx.dll", result);
}