How to generate bill number every day starts from 1

Question

1.00/5 (1 vote)

See more:

i am creating windows application using c# 2010 windows application, in my application i am using below code for bill number generation, but here i want how to my bill number every day starts from 1. give me any one some ideas.

public void AutoNumber()
{

SqlConnection con = new SqlConnection(db.Connectionstring());
con.Open();

SqlCommand cmd = new SqlCommand("SELECT max(billno) +1 FROM billing", con);

SqlDataReader dr = cmd.ExecuteReader();

if (dr.HasRows)
{

while (dr.Read())
{
lblbillno.Text = dr[0].ToString();

if (lblbillno.Text == "")
{
lblbillno.Text = "1";
}


}
}

else
{
lblbillno.Text = "1";

}
con.Close();
}

What I have tried:

How to generate bill number every day starts from 1

Posted 2-Feb-17 22:07pm

Boopalslm

Updated 3-Feb-17 0:35am

Add a Solution

Comments

Afzaal Ahmad Zeeshan 3-Feb-17 4:35am

~~Never mind.~~

3 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

CPallini · Answer 1 · 2017-02-02T22:17:00

Solution 1

You have to store the date of the last bill number. Then if such a date doesn't match with the current one, restart with billno=1.

Posted 2-Feb-17 22:17pm

CPallini

Comments

OriginalGriff 3-Feb-17 4:31am

Or, you can use PARTITION BY to give an automatic count by the day when you query the DB...

OriginalGriff · Answer 2 · 2017-02-02T22:30:00

Never ever do that. while it may appear to work fine, in a production environment it is a recipe for disaster as multiple users end up with the same value and your entire database very quickly becomes corrupted beyond belief.

Use an IDENTITY column in your DB, and let SQL sort out unique numbers. You can then use a subquery to return a incremental value per day by using PARTITION BY:

SELECT ROW_NUMBER() OVER (PARTITION BY EnterDate  ORDER BY RowIDValueColumn ASC) AS DailyNumber, * 
FROM MyTable 
WHERE EnterDate >= '2016-02-02' 
ORDER BY RowIDValueColumn ASC

Peter Leow · Answer 3 · 2017-02-03T00:35:00

Solution 3

As OriginalGriff has said, you don't. Let the SQL server manage it.
On the other hand, if your bill number has a certain format besides a running number, you may want to take a look at this Ask Your Database for that Unique ID[^].

Posted 3-Feb-17 0:35am

Peter Leow