C how to create a Guid value

Question

One field of our struct is Guid type  How to generate a valid value for it

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There are two ways  var guid   Guid NewGuid      or   var guid   Guid NewGuid   ToString      both use the Guid class  the first creates a Guid Object  the second a Guid string

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If you are using this in the Reflection C   you can get the guid from the property attribute as follows  var propertyAttributes  property GetCustomAttributes    foreach var attribute in propertyAttributes      var myguid  Guid Parse attribute Id ToString

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Guid id   Guid NewGuid

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To makes an  empty  all-0 guid like 00000000-0000-0000-0000-000000000000   var makeAllZeroGuID   new System Guid      or  var makeAllZeroGuID   System Guid Empty    To makes an actual guid with a unique value  what you probably want       var uniqueGuID   System Guid NewGuid

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var guid   new Guid      Hey  its a  valid   although not very useful  Guid    the guid is all zeros  if you don t know  Sometimes this is needed to indicate no guid  in cases where you don t want to use a nullable Guid

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Alternately  if you are using SQL Server as your database you can get your GUID from the server instead  In TSQL    Retrive your key ID on the bases of GUID   declare  ID as uniqueidentifier  SET  ID NEWID   insert into Sector Sector CID   Values   Diry7   ID    select SECTORID from sector where CID  ID

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If you want to create a  desired  Guid you can do   var tempGuid   Guid Parse   lt guidValue gt       where  lt guidValue gt  would be something like 1A3B944E-3632-467B-A53A-206305310BAE

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System Guid desiredGuid   System Guid NewGuid

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There s also ShortGuid - A shorter and url friendly GUID class in C   It s  available as a Nuget  More information here   PM gt  Install-Package CSharpVitamins ShortGuid   Usage   Guid guid   Guid NewGuid    ShortGuid sguid1   guid     implicitly cast the guid as a shortguid Console WriteLine sguid1   Console WriteLine sguid1 Guid     This produces a new guid  uses that guid to create a ShortGuid  and displays the two equivalent values in the console  Results would be something along the lines of   ShortGuid  FEx1sZbSD0ugmgMAF RGHw  Guid       b1754c14-d296-4b0f-a09a-030017f4461f

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Guid NewGuid   creates a new random guid

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Guid NewGuid   will create one

[c#] C# how to create a Guid value?

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