How to create GUID in c#?


  • What is a GUID

    For those of you who don't know, a GUID (pronounced goo'id - Globally unique identifier) is a 128-bit integer that can be used to uniquely identify something. You may store users or products in your database and you want somehow uniquely identify each row in the database. A common approach is to create a autoincrementing integer, another way would be to create a GUID for your products.

    How to create a GUID in C#

    The GUID method can be found in the System namespace. The GUID method System.Guid.NewGuid() initializes a new instance of the GUID class.

    There are also a few overloads available for those of you who want the GUID formatted in a particular fashion.

    The following live sample will output the GUID generated, the source code is also below. 

    Response.Write(@"<br>System.Guid.NewGuid().ToString() = " + System.Guid.NewGuid().ToString());
       Response.Write(@"<br>System.Guid.NewGuid().ToString(""N"") = " + System.Guid.NewGuid().ToString("N"));
       Response.Write(@"<br>System.Guid.NewGuid().ToString(""D"") = " + System.Guid.NewGuid().ToString("D"));
       Response.Write(@"<br>System.Guid.NewGuid().ToString(""B"") = " + System.Guid.NewGuid().ToString("B"));
       Response.Write(@"<br>System.Guid.NewGuid().ToString(""P"") = " + System.Guid.NewGuid().ToString("P"));
    Tuesday, May 08, 2007 6:47 AM


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