When is a GUID not a GUID?

Question

User68971474 posted

[edited] 

I want a GUID, and can't seem to make one!

My code should convert a string to a GUID; but the resulting GUID is always empty.

Here's my code with an actual GUID string that fails:

Private _userGuid As String = "d5774e1e-b3c4-4f2f-9d1e-c2d9e03df61d"
Private _gGuid As Guid

_gGuid = New Guid(_userGuid)

...

Stopping on the next line, I examine _gGuid, and it's Empty.

 

Answer 1

User1564875471 posted

 

_gGuid = New Guid(_userGuidStr)

i think you have o change that line to :

 _gGuid = New Guid(_strGuidStr)

Answer 2

User68971474 posted

Thank you, Anas.  I fixed my post above; my editing was bad.

Anyway, I thought maybe the Guid string was case-sensitive.  So I forced it to uppcase with .ToUpper.

Still not working.  What's the mystery here?

Answer 3

User68971474 posted

I don't get any exceptions either.  Just an empty Guid.

Answer 4

User1564875471 posted

 Yes , The new Guid  will looks empty in debug , but its not !

You can get its value by calling its .ToString() method ,

dim GuidValue as string= YourGuidInstance.ToString()

 

You can also use the GuidGen tool which generate a guids string for you , 

to add the tool to vs , go to Tools->Eternal Tools -> Add ,

for the command value  use : C:\Program Files\Microsoft Visual Studio 8\Common7\Tools\guidgen.exe

 

Answer 5

User68971474 posted

The new Guid looks empty in Debug?!

Ok, I can accept that.

My Guid comes from column userId in table aspnet_Users, so generating them will not help in this case.

Thank you