SolvedPrivate

how to avoid inserting duplicate records C# with LINQ to sql

Posted on 2014-02-12
2
37 Views
Last Modified: 2016-02-10
I have this snippet of LINQ code to add a record to my table
protected void cmd_Click(object sender, EventArgs e)
{
   AddressTbl AddressTbl = new AddressTbl();
  AddressTbl.Bsc_CTL_NO = Convert.ToInt32(txtBSC_NO_Text);
  AddressTbl.EmpTableType = intEmpTableType;
  AddressTbl.Address_Desc = txt Address_Desc.Text;




MyTelephoneDataContext.AddressTbls.InsertOnSubmit(AddressTbl);
MyTelephoneDataContext.SubmitChanges();

viewDataOnGrid();
}

I need to prevent from adding a duplicate records.
The combination of two columns (AddressTbl.Bsc_CTL_NO and AddressTbl.EmpTableType ) should be unique.
How could I do such a thing ?
Please help.
0
Comment
Question by:Mohammad Alsolaiman
2 Comments
 
LVL 16

Accepted Solution

by:
Surendra Nath earned 500 total points
ID: 39855518
You can simply add that as a constraint in the DB ( a unique key constraint / or a composite primary key).

Then the insert to the DB fails with PK error, you can capture that and throw the same to the user.
0
 

Author Closing Comment

by:Mohammad Alsolaiman
ID: 39937223
thanks a lot
0

Featured Post

DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

Question has a verified solution.

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

Just a quick little trick I learned recently.  Now that I'm using jQuery with abandon in my asp.net applications, I have grown tired of the following syntax:      (CODE) I suppose it just offends my sense of decency to put inline VBScript on a…
A quick way to get a menu to work on our website, is using the Menu control and assign it to a web.sitemap using SiteMapDataSource. Example of web.sitemap file: (CODE) Sample code to add to the page menu: (CODE) Running the application, we wi…
Established in 1997, Technology Architects has become one of the most reputable technology solutions companies in the country. TA have been providing businesses with cost effective state-of-the-art solutions and unparalleled service that is designed…

807 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