Improve company productivity with a Business Account.Sign Up

x
?
Solved

SQL queries using VB 2010

Posted on 2011-03-24
6
Medium Priority
?
680 Views
Last Modified: 2013-12-25
Although OK with VB, I have never coded anything to connect to SQL and run queries.

I have my connection already as "conn"

What I want to do is run a query and store the result in a variable.

My query is:-

SELECT SUM(timetaken) FROM dbo.ACTIONS where who='roybridge' and Whe_ >= '03/01/2011'

Open in new window


How do I do this in VB 2010?

Thanks
0
Comment
Question by:Chris Millard
  • 3
  • 3
6 Comments
 
LVL 5

Accepted Solution

by:
bitref earned 2000 total points
ID: 35205024
        'Declare Connection
        Dim conn As New SqlConnection

        'Set connection string
        conn.ConnectionString = ""
        'Declare command and set its connection, type and SQL test (Query)
        Dim cmd As New SqlCommand
        cmd.Connection = conn
        cmd.CommandType = CommandType.Text
        cmd.CommandText = ""

        'Declare output string
        Dim strOutput As String

        'Open the connection, fill the output string and close the connection
        conn.Open()
        strOutput = cmd.ExecuteScalar
        conn.Close()

Open in new window

0
 
LVL 17

Author Comment

by:Chris Millard
ID: 35205353
When the code gets to

strOutput = cmd.ExecuteScalar

I get an error "ExecuteScalar: CommandText property has not been initialized"

0
 
LVL 5

Assisted Solution

by:bitref
bitref earned 2000 total points
ID: 35205411
Did you insert your query in the command CommandText property?
0
Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

 
LVL 17

Author Comment

by:Chris Millard
ID: 35205491
This is the full code:-

        Dim conn As New SqlConnection()
        conn.ConnectionString = "Data Source=RCSRV01;Initial Catalog=NetHDRedcatSQL;Persist Security Info=True;User ID=sa;Password=letmein"

        Dim cmd As New SqlCommand
        cmd.Connection = conn
        cmd.CommandType = CommandType.Text
        cmd.CommandText = ""

        Dim strOutput As String

        conn.Open()
        strOutput = cmd.ExecuteScalar
        conn.Close()

Open in new window

0
 
LVL 5

Assisted Solution

by:bitref
bitref earned 2000 total points
ID: 35205557
Put your query in the command CommandText:
cmd.CommandText = "SELECT SUM(timetaken) FROM dbo.ACTIONS where who='roybridge' and Whe_ >= '03/01/2011'"

Open in new window

0
 
LVL 17

Author Comment

by:Chris Millard
ID: 35205648
D'oh! Stupidly I didn't see that!!!
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

In this article I will describe the Copy Database Wizard method as one possible migration process and I will add the extra tasks needed for an upgrade when and where is applied so it will cover all.
As a person who answers a lot of questions, I often see code that could be simplified, made easier to read, and perhaps most importantly made easier to maintain if the code was modified to use the Select Case statement. This article explains how to…
As developers, we are not limited to the functions provided by the VBA language. In addition, we can call the functions that are part of the Windows operating system. These functions are part of the Windows API (Application Programming Interface). U…
Get people started with the process of using Access VBA to control Excel using automation, Microsoft Access can control other applications. An example is the ability to programmatically talk to Excel. Using automation, an Access application can laun…

601 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