How Do I Handle Dir I Have 2 Dir Test1 And Test2

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I have 2 directories, test1 and test2. test1 contains 2 files: abc.txt and xyz.txt, while in test2 there are 3 files: abc.txt, sdf.txt and fgh.txt.
I just want two copy the files in to another directory like
xyz.txt is not in test2 so copy it and place it in test2.
Likewise make both the directories the same: do not touch the abc.txt because it present in both (although their contains are different).

Posted 27-May-14 0:26am

Member 10846560

Updated 27-May-14 2:02am

CPallini

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OriginalGriff · Answer 1 · 2014-05-27T01:21:00

It's not complex:
List the content of each folder into an array of strings: Directory.GetFiles will do that.
Then create a comparer to only reference the file names, and use Linq Except.
It's then a simple matter to use File.Copy or File.Move to shift the files themselves:

C#

string[] dir1 = Directory.GetFiles(@"D:\Temp\Dir1");
string[] dir2 = Directory.GetFiles(@"D:\Temp\Dir2");
var newFiles = dir1.Except(dir2, new FileNameComparer());
foreach (string s in newFiles)
    {

    }

C#

private class FileNameComparer : IEqualityComparer<string>
    {
    public bool Equals(string x, string y)
        {
        return Path.GetFileName(x) == Path.GetFileName(y);
        }

    public int GetHashCode(string obj)
        {
        return Path.GetFileName(obj).GetHashCode();
        }
    }

[edit]Forgot the comparer class... :O [/edit]