C# Tutorials and offshore development in India

Prizes & Awards

My Profile

AdSense Revenue

Active Members
Today

Abhi (65)
Appukuttan (40)
divya (36)

Last 7 Days

more...

New Feature: Community Sites: Create your own .NET community website and start earning from Google AdSense ! It's Free !

What is GUID ? How to generate a GUID ?

Posted Date: 11 Mar 2004	Resource Type: Articles	Category: General
Author: Tony John	Member Level: Gold
Rating:	Points: 10

GUID stands for Globally Unique IDentifier. It is a string of
numbers and/or letters.

A GUID represents a Unique identifier - means you cannot generate the same GUID
more than once. A GUID has a very low (...practically impossible) probability of being duplicated

GUIDs have a variety of applications. You can use a GUID as a primary
key in your database table or in a several other scenarios. A good
example would be, if you have a distributed application where data is
generated and stored in various locations and you want to merge all those
data at some intervals of time, you may use GUID as the primary key.

GUIDs can be generated in a number of ways; most often a hash of
several things that might be unique at any given point in time like the IP
address plus the clock date/time etc are used to generate Unique Ids.
Each system may have slightly different algorithm to generate the Unique
Id.

In .net, you can use the System.Guid class to generate a GUID. See the
following sample code :


System.Guid  guid = System.Guid.NewGuid ();
String id = guid.ToString();

System.Guid.NewGuid () returns a Guid object. You can use the
.ToString() method to convert it to a string. In the above example, you may get
a string which look like the following:


"b91c9121-0a17-4b26-a09d-d5980eb532db"

Can anyone generate the same Guid as shown above ? Try your luck !!

Responses

Author: Abhinav 18 Sep 2004 Member Level: Bronze Points : 0

It helped me a lot. i got an idea abt how to avoid multiple savings

Feedbacks

Popular Tags

What are tags ?

Search Tags

(No tags found.)

Post Feedback

This is a strictly moderated forum. Only approved messages will appear in the site. Please use 'Spell Check' in Google toolbar before you submit.
You must Sign In to post a response.

	Next Resource: AutoPostBack - What it is and How it works ?
	Previous Resource: How to convert C# code to Vb.net
	Return to Discussion Resource Index
	Post New Resource
	Category: General

Post resources and earn money!

Related Resources

dotNet Slackers BizTalk Adaptors Web Design