C# how to create a Guid value?

Question

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

Answer 1

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)

Answer 2

There's also ShortGuid - A shorter and url friendly GUID class in C#. It's available as a Nuget. More information here.

PM> 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

Answer 3

System.Guid desiredGuid = System.Guid.NewGuid();

Answer 4

Guid.NewGuid() creates a new random guid.

Answer 5

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