Solved

VB.Net - Comparison to figure out if there are duplicates

Posted on 2007-11-29
6
150 Views
Last Modified: 2011-10-03
I have the following scenario.  I have a SQL Server table that holds PERSON data such as name, address, phone number etc..  The Email_ID is the Primary Key.  I have 6 kinds of Persons:

1.  Requestor           -   bobscott@yahoo.com  - strRQEmailID
2.  Project Leader    -   bobscott@yahoo.com - strPLEmailID
3.  Primary Contact  -   lindamathews@yahoo.com - strPMEmailID
4.  Admin Contact   -    ronsloan@yahoo.com - strADEmailID
5.  Technical Contact  -  shirleywhite@yahoo.com - strTCEmailID
6.  24HrSupport Contact - ronsloan@yahoo.com - strTWEmailID

The persons in 1 and 2 (don't have to be) but they can be the same person.
The persons in 3,4,5,6 can be the same person also.

I have 6 separate strings that hold the email-ids of each.    What I need to do is compare each email-id to the other and determine which ones are unique and which ones are duplicates.  Then I need to discard the duplicates and INSERT only the ones that are unique.  As I mentioned earlier, the EmailID is the Primary key.

Can someone please help with the logic of the code (in VB.Net).    I don't have a code snippet to attach because I don't know where to begin.
0
Comment
Question by:msyed1
  • 3
6 Comments
 
LVL 18

Accepted Solution

by:
jcoehoorn earned 500 total points
ID: 20377158
It's typically a good idea to use the existing data structures provided for you.  As it happens, most of the collections already provide a way to see if an item exists.  I'll show you the list, since it's the simplest:

    Dim keys As New System.Collections.Generic.List(Of String)
    keys.Add(strRQEmailID)
   
    If Not keys.Contains(strPLEmailID) Then keys.Add(strPLEmailID)
    If Not keys.Contains(strPMEmailID) Then keys.Add(strPMEmailID)
    If Not keys.Contains(strADEmailID) Then keys.Add(strADEmailID)
    If Not keys.Contains(strTCEmailID) Then keys.Add(strTCEmailID)
    If Not keys.Contains(strTWEmailID) Then keys.Add(strTWEmailID)

    Dim conn As New SqlClient.SqlConnection("your connection string here")
    Dim cmd As New SqlClient.SqlCommand("INSERT INTO PERSON (Email_ID) VALUES (@Email)", conn)
    Dim param As SqlClient.SqlParameter = cmd.Parameters.Add("@Email", SqlDbType.VarChar, 50)
   
    conn.Open()
    For Each key As String In Keys
        param.Value = key
        cmd.ExecuteNonQuery()
    Next key
    conn.Close()

0
 
LVL 18

Expert Comment

by:jcoehoorn
ID: 20377175
I should mention that the code I posted assumes you none of the people already exist in the database.
0
 

Author Comment

by:msyed1
ID: 20377419
Thanks for the code, I tried it....but I think Generics are only available in .Net 2.0 and above.  I am using Microsoft .Net Framework 1.1.
How can I do the comparison easily in .Net 1.1 ??
0
 
LVL 18

Expert Comment

by:jcoehoorn
ID: 20377540
Try using a system.collections.ArrayList instead.
0
 
LVL 1

Expert Comment

by:modus_operandi
ID: 20556029
Forced accept.
modus_operandi
EE Moderator
0

Featured Post

Efficient way to get backups off site to Azure

This user guide provides instructions on how to deploy and configure both a StoneFly Scale Out NAS Enterprise Cloud Drive virtual machine and Veeam Cloud Connect in the Microsoft Azure Cloud.

Question has a verified solution.

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

A while ago, I was working on a Windows Forms application and I needed a special label control with reflection (glass) effect to show some titles in a stylish way. I've always enjoyed working with graphics, but it's never too clever to re-invent …
It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
Along with being a a promotional video for my three-day Annielytics Dashboard Seminor, this Micro Tutorial is an intro to Google Analytics API data.
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…

777 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