Generate the id Like 'Cust001'

Question

1.00/5 (3 votes)

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I Want to generate the Customer ID Like this CUST001...And second customer ID Like CUST002....
my code like this

C#

string str = "Cust";
for (int i = 001; i<= 999; i++)
 {
   string id = str + i;
         
 }

Please help me....
thanking you in advance....

Posted 18-Mar-13 8:53am

praveenkatkuri

Updated 18-Mar-13 10:32am

Maciej Los

v4

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joshrduncan2012 18-Mar-13 14:54pm

We need a lot more info. What are you trying to do exactly? Where is your code? What is your question? Where are you stuck? This isn't a well-formed question.

Prasad Khandekar 18-Mar-13 15:03pm

Hello Praveen,

The way I do it in my applications is to use a sequence and have a small function which takes 3 parameters the prefix, the serial and the desired length. Then it's all simple math. The number of zeros to be pad is equal to desired length - prefix length - serial length.

Regards,

Sergey Alexandrovich Kryukov 18-Mar-13 15:48pm

Wow, no more then 999 customers! Why?!
—SA

2 solutions

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Maciej Los · Answer 1 · 2013-03-18T11:56:00

Bad practice is bad practice ;(

If you have got table Customers without any identity[^] field (CustId), you're in trouble. Literally!
So, as soon as possible, alter table[^] and add column with identity. Any other solutions are partial.

Temporary, you can use ROW_NUMBER()[^], but this can't solve your problem.

SQL

SELECT 'Cust' + CONVERT(NVARCHAR(10),ID) AS CustID, [CustFName], [CustLName]
FROM (
    SELECT ROW_NUMBER() OVER(ORDER BY [CustLName]) AS ID, [CustFName], [CustLName]
    FROM Customers
    ) AS t1

Another, temporary solution, when you add new customer to your database, is to get the count of customers plus one.

SQL

DECLARE @id INT

SELECT @id = COUNT(*) + 1
FROM @cust

SELECT 'Cust' + CONVERT(NVARCHAR(10), @id ) AS LastCustomer

This solution is charged with errors too. Why? Remove one record to become convinced...

Summary
Alter table with identity field!

Leo Chapiro · Answer 2 · 2013-03-18T09:13:00

Solution 1

Try this:

C#

for (int i = 1; i < 1000; i++)
{
 string id = "Cust";
 id += i.ToString("000");

}

Posted 18-Mar-13 9:13am

Leo Chapiro

Updated 18-Mar-13 9:15am

v2

Comments

praveenkatkuri 18-Mar-13 16:19pm

it is display only the last number like CUST999 but i want to generate the id for each customer...cust001, cust002,.......cust999

Leo Chapiro 18-Mar-13 16:22pm

lol - I don't think so, finally here is a loop ;)

[no name] 18-Mar-13 16:38pm

What do you mean that it only displays the last number? Neither you or du[DE] are displaying anything anywhere. If you are displaying the result somewhere that is another problem that you need to figure out.

Maciej Los 18-Mar-13 17:59pm

Technically... Solution is good (+5!), but it don't solves OP's problem ;)