Solved

Writing a SQL query through VB.net to oracle

Posted on 2007-11-19
4
162 Views
Last Modified: 2010-05-19
Hey, i need to connect to oracle when i press a button, and ask this SQL query:

SELECT oi.vare_nr, oi.ans_nr, COUNT(*)
FROM ordreinfo oi, vare v, ansatt a
WHERE v.vare_nr = oi.vare_nr
AND a.ans_nr = oi.ans_nr
GROUP BY oi.vare_nr, oi.ans_nr;

after this i need to get the information i receive from the SQL query to a listbox, how do i do this?


I was thinking something like this (its some variables there in norwegian, but you understand :))

I dont understand how i should implement this SQL query to my code, and i dont know if this is the correct way to go :)
Dim forbindelse As New System.Data.OracleClient.OracleConnection
 

        forbindelse.ConnectionString = "user id=****;password=****;data source=oracle.*******"

        forbindelse.Open()
 

        Dim setning As String = "sql query?????"
 
 

        Dim kommando As New System.Data.OracleClient.OracleCommand(setning, forbindelse)
 
 

        Dim dataleser As OracleClient.OracleDataReader

        dataleser = kommando.ExecuteReader()

Open in new window

0
Comment
Question by:leeds2000
  • 2
  • 2
4 Comments
 
LVL 15

Accepted Solution

by:
Solar_Flare earned 500 total points
ID: 20316928
yes you are on the right track

once that code has finished you will want to set the datasource of the listbox = dataleser
Dim forbindelse As New System.Data.OracleClient.OracleConnection

 

        forbindelse.ConnectionString = "user id=****;password=****;data source=oracle.*******"

        forbindelse.Open()

 

        Dim setning As String = "SELECT ...."

 

 

        Dim kommando As New System.Data.OracleClient.OracleCommand(setning, forbindelse)

 

 

        Dim dataleser As OracleClient.OracleDataReader

        dataleser = kommando.ExecuteReader()
 

 listbox1.Datasource = dataleser ''bind the results of the query to the listbox, make sure you have the display and value members of the listbox set to the correct column names in the query

 dataleser.Close()

 

Open in new window

0
 
LVL 3

Author Comment

by:leeds2000
ID: 20316979
Okei, i will try this tomorrow, thanks for the help so far :)
0
 
LVL 3

Author Comment

by:leeds2000
ID: 20329955
Im struggling with getting the information from this SQL query to show in the listbox or a datagridview, how do i do this?
please help
0
 
LVL 15

Expert Comment

by:Solar_Flare
ID: 20378323
you need to make sure the datatextfield and datavaluefield are set to the appropriate field names from the query so it knows which fields to use for the text and value
0

Featured Post

Free Trending Threat Insights Every Day

Enhance your security with threat intelligence from the web. Get trending threat insights on hackers, exploits, and suspicious IP addresses delivered to your inbox with our free Cyber Daily.

Join & Write a Comment

This article started out as an Experts-Exchange question, which then grew into a quick tip to go along with an IOUG presentation for the Collaborate confernce and then later grew again into a full blown article with expanded functionality and legacy…
If you need to start windows update installation remotely or as a scheduled task you will find this very helpful.
Via a live example show how to connect to RMAN, make basic configuration settings changes and then take a backup of a demo database
Video by: Steve
Using examples as well as descriptions, step through each of the common simple join types, explaining differences in syntax, differences in expected outputs and showing how the queries run along with the actual outputs based upon a simple set of dem…

743 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

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now