C# convert DOMAIN\USER to USER@DOMAIN

Question

I currently have the following code:

string user = @"DOMAIN\USER";
string[] parts = user.Split(new string[] { "\\" }, StringSplitOptions.None);
string user = parts[1] + "@" + parts[0];

Input string user can be in one of two formats:

DOMAIN\USER
DOMAIN\\USER (with a double slash)

Whats the most elegant way in C# to convert either one of these strings to:

USER@DOMAIN

You could do it with a Regex. I'll leave someone else to construct that regex though :) — podiluska, Aug 03 '12 at 14:06

score 7 · Accepted Answer · answered Aug 03 '12 at 14:03

7

Not sure you would call this most elegant:

string[] parts = user.Split(new string[] {"/"},
                            StringSplitOptions.RemoveEmptyEntries);
string user = string.Format("{0}@{1}", parts[1], parts[0]);

answered Aug 03 '12 at 14:03

Oded

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@MAfifi - Not needed, not with `RemoveEmptyEntries`. Try it. – Oded Aug 03 '12 at 14:07

score 2 · Answer 2 · answered Aug 03 '12 at 14:08

2

How about this:

        string user = @"DOMAIN//USER";
        Regex pattern = new Regex("[/]+");
        var sp = pattern.Split(user);
        user = sp[1] + "@" + sp[0];
        Console.WriteLine(user);

answered Aug 03 '12 at 14:08

Mithrandir

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Agh, that'll teach me from thinking I understand regexes for a while. +1 – vcsjones Aug 03 '12 at 14:14

score 2 · Answer 3 · edited May 23 '17 at 11:48

2

A variation on Oded's answer might use Array.Reverse:

string[] parts = user.Split(new string[] {"/"},StringSplitOptions.RemoveEmptyEntries);
Array.Reverse(parts);
return String.Join("@",parts);

Alternatively, could use linq (based on here):

return user.Split(new string[] {"/"}, StringSplitOptions.RemoveEmptyEntries)
       .Aggregate((current, next) => next + "@" + current);

edited May 23 '17 at 11:48

Community

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answered Aug 03 '12 at 14:14

Jon Egerton

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score 0 · Answer 4 · answered Aug 03 '12 at 14:16

0

You may try this:

String[] parts = user.Split(new String[] {@"\", @"\\"}, StringSplitOptions.RemoveEmptyEntries);
user = String.Format("{0}@{1}", parts[1], parts[0]);

answered Aug 03 '12 at 14:16

gazda

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score 0 · Answer 5 · answered Aug 03 '12 at 14:18

0

For the sake of adding another option, here it is:

string user = @"DOMAIN//USER";
string result = user.Substring(0, user.IndexOf("/")) + "@" + user.Substring(user.LastIndexOf("/") + 1, user.Length - (user.LastIndexOf("/") + 1));

answered Aug 03 '12 at 14:18

StoriKnow

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C# convert DOMAIN\USER to USER@DOMAIN

5 Answers5