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Editorial Team
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Asked: 2026-05-20T23:36:32+00:00

I need (I think) to get the current logged in userID so that I

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I need (I think) to get the current logged in userID so that I can update one of my tables that uses this userID as a foreign key. The problem is that the userID in the database does not match with this:

Guid currentUser = (Guid)Membership.GetUser().ProviderUserKey;
currentUser.toString();

results in dffaca0c-ae0b-8549-8073-1639985740be

whereas when I look in the database, it is 0CCAFADF0BAE498580731639985740BE

Why are they different values? (I only have one user). I am using an oracle database and provider for asp.net, but shouldn’t make any difference.

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1 Answer

  1. Editorial Team

    I believe these are the same values, but the display order is different. Looking at the 2 values:

    dffaca0c-ae0b-8549-8073-1639985740be
0CCAFADF-0BAE-4985-8073-1639985740BE

    The ordering of bytes for the first 3 segments is of a different order:

    0CCA FADF => FADF 0CCA => DFFA CA0C == dffaca0c

0BAE => AE 0B == ae0b

4985 => 85 49 == 8549

    As @x0n comments, this looks like a difference in endianness with Oracle. According the this description of the structure, the endianness of the first 8 bytes is system dependent, while the endianness of the last 8 bytes is specifically big endian.

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