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PHP equivalent to uniqid () in C #

trying to duplicate some PHP code in C #. The PHP code uses the uniqid function with a larger entropy parameter of true. Any idea on the best way to duplicate this in C #?

http://us2.php.net/uniqid

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something like:

string uniqid(string prefix, bool more_entropy) {
    if(string.IsNullOrEmpty(prefix)) 
      prefix = string.Empty;

    if (!more_entropy) {
      return (prefix + System.Guid.NewGuid().ToString()).Left(13);
    } else {
      return (prefix + System.Guid.NewGuid().ToString() + System.Guid.NewGuid().ToString()).Left(23);
    }
 }

Edit: display comments



This is very easy off the head of my solution, and I would suggest that for a more rigorous solution, you investigate the correct "random" number generation, for example through the System.Math namespace. Please check out these other SO questions and answers about random number generation .

System.Guid.NewGuid (). ToString ()

You will get a unique string.

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After some googling I found how PHP uniqid works and implemented it in C #:

private string GetUniqID()
{
    var ts = (DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0));
    double t = ts.TotalMilliseconds / 1000;

    int a = (int)Math.Floor(t);
    int b = (int)((t - Math.Floor(t)) * 1000000);

    return a.ToString("x8") + b.ToString("x5");
}


This code provides the same result, the only difference is that the additional parameters to uniqid () are not implemented.

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