C# how to create a Guid value?

问题

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

回答1:

Guid id = Guid.NewGuid();

回答2:

Guid.NewGuid() creates a new random guid.

回答3:

There are two ways

var guid = Guid.NewGuid();

var guid = Guid.NewGuid().ToString();

both use the Guid class, the first creates a Guid Object, the second a Guid string.

回答4:

Guid.NewGuid() will create one

回答5:

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)

回答6:

To makes an "empty" all-0 guid like 00000000-0000-0000-0000-000000000000.

var makeAllZeroGuID = new System.Guid();

var makeAllZeroGuID = System.Guid.Empty;

To makes an actual guid with a unique value, what you probably want.

var uniqueGuID = System.Guid.NewGuid();

回答7:

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

回答8:

If you want to create a "desired" Guid you can do

var tempGuid = Guid.Parse("<guidValue>");

where <guidValue> would be something like 1A3B944E-3632-467B-A53A-206305310BAE.

回答9:

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());
}

回答10:

//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

来源：https://stackoverflow.com/questions/2344098/c-sharp-how-to-create-a-guid-value

标签

guid