how to send a unique id on user's email address when user sign up...

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ASP.NET

how to send a unique id on user's email address when user sign up...in asp.net c#

Posted 13-Mar-13 7:00am

vishal salve

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CHill60 13-Mar-13 13:04pm

You're going to have to add some more detail here - sign up to what, how are you storing the user's details, do you want to know how to email or how to generate a unique id?

2 solutions

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DinoRondelly · Answer 1 · 2013-03-13T10:59:00

Solution 1

First you create a unique ID using whatever you would like,

You might want to look into this class,

http://msdn.microsoft.com/en-us/library/system.random.aspx[^]

Or as Mike has pointed out in the comments,

- A SQL table's Primary Key declared as an auto-incremented Identity column will create a unique id number

Then you send them an email with this unique id,

http://social.msdn.microsoft.com/Forums/en-US/netfxnetcom/thread/a75533eb-131b-4ff3-a3b2-b6df87c25cc8[^]

Posted 13-Mar-13 10:59am

DinoRondelly

Updated 13-Mar-13 12:38pm

v2

Comments

Mike Meinz 13-Mar-13 18:36pm

Be careful. A Random Number generator does not create unique numbers. At some point, it is possible for a Random Number generator to output a number that is has previously returned.

A SQL table's Primary Key declared as an auto-incremented Identity column will create a unique id number.

DinoRondelly 13-Mar-13 18:38pm

Your right, i have updated the solution with your remarks, Thanks

jkirkerx · Answer 2 · 2013-03-13T17:53:00

Just use the current date, time and seconds

something like below, seriously doubt you have that many emails to send to overlap the seconds

Dim uniqueID as string = DateTime.now.ToString("yymmddhms")

or for a length of 10

private string GenerateId()
        {
            long i = 1, j=-1;
            foreach (byte b in Guid.NewGuid().ToByteArray()){i *= ((int)b + 1);}
            foreach (byte b in Guid.NewGuid().ToByteArray()) { j *= ((int)b + 1); }
            var str1 = string.Format("{0:d}", (i - DateTime.Now.Millisecond));
            var str2 = string.Format("{0:d}", (j - DateTime.Now.Millisecond));
            return "EMC" + str1.Substring(0, 4) + str2.Substring(str2.Length/2, 3);
        }