Solved

How to generate unique id in textbox.

Posted on 2012-03-20
3
182 Views
Last Modified: 2012-03-20
I have a table where records are to be entered.
Initially there are no records.
On frontend, i have a button Generate ID, and a textbox, i want when the user click on this button, automatically 1should come and so on.
This will happen at multiuser levels with one database.
How to put the number generated in textbox.

Please send code.

Table mststudents, id is the field which is primary key identity(1,1) is set.
textbox name is txtuin.
Connection name is con
please send the query.
0
Comment
Question by:searchsanjaysharma
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 83

Accepted Solution

by:
CodeCruiser earned 500 total points
ID: 37741394
>This will happen at multiuser levels with one database

You will have problem at some stage with this code.

Either use Identity column or use a stored procedure to do the insertions

Getting the ID is easier

command.commandtext = "Select IsNull(Count(*), 0) From mytable"

Dim cnt As Integer = command.ExecuteScalar()

txtID.Text = cnt + 1
0
 

Author Comment

by:searchsanjaysharma
ID: 37741421
identity is already set.
how to solve this.
s = "select isnull(max(id),0)+1  from mststudents"
will this be ok, if multiple people are doing the dataentry and all should have separate UIN.
I want all users should get separate uin
0
 

Author Closing Comment

by:searchsanjaysharma
ID: 37741630
Ok, ok.
0

Featured Post

Instantly Create Instructional Tutorials

Contextual Guidance at the moment of need helps your employees adopt to new software or processes instantly. Boost knowledge retention and employee engagement step-by-step with one easy solution.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
VB.NET 2008 - SQL Timeout 9 51
Calculate number of nights between two dates 5 93
Filtering a datagrid view 8 34
Broken .resx file generating errors 18 26
Calculating holidays and working days is a function that is often needed yet it is not one found within the Framework. This article presents one approach to building a working-day calculator for use in .NET.
If you need to start windows update installation remotely or as a scheduled task you will find this very helpful.
In a recent question (https://www.experts-exchange.com/questions/29004105/Run-AutoHotkey-script-directly-from-Notepad.html) here at Experts Exchange, a member asked how to run an AutoHotkey script (.AHK) directly from Notepad++ (aka NPP). This video…
How to Install VMware Tools in Red Hat Enterprise Linux 6.4 (RHEL 6.4) Step-by-Step Tutorial

730 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question