Solved

Can I load one dataset with more than one datatables in this way?

Posted on 2006-07-12
7
208 Views
Last Modified: 2010-04-23
I tried the following in vs 2003 win form app.

Dim arParms() As SqlParameter = New SqlParameter(0) {}
        arParms(0) = New SqlParameter("@P1", SqlDbType.VarChar)
        arParms(0).Value = JobID
            dsOrder = SqlHelper.ExecuteDataset(cn_str_W, CommandType.StoredProcedure, "CT_getOrder", arParms)
            dsOrder.Tables(0).TableName = "order"
            dsOrder = SqlHelper.ExecuteDataset(cn_str_Q, CommandType.StoredProcedure, "CT_getProduct", arParms)
            dsOrder.Tables(1).TableName = "Product"

I got index out of range exception on last line. How do I set the index first? The code is fine if I removed last two lines.

Thanks!
0
Comment
Question by:ommer
[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
  • 3
  • 2
  • 2
7 Comments
 
LVL 24

Expert Comment

by:Jeff Certain
ID: 17094837
We'd need to see SqlHelper. However, you're assigning the output from ExecuteDataset to the dataset twice, which means that you're overwriting the dataset the second time you call it. So, effectively, you're only making the second call.
0
 

Author Comment

by:ommer
ID: 17095472
The sqlHelper class is from Microsoft Data Access Application Block. I don't have the source code right now.

Anyway, as I understand, one dataset can have many data tables in it. This is new to me, given my ado recordset background. How do you typically load the 2nd table to the dataset? Do you have to make the stored procedures returns multiple sets, or do I need to "pre-dimension" the dataset-datatables?

0
 
LVL 24

Expert Comment

by:Jeff Certain
ID: 17095638
Generally, you'd load the second set of data into a table, then add that table to the dataset...
0
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.

 
LVL 17

Expert Comment

by:ZeonFlash
ID: 17096227
A fan of SqlHelper myself, I've tinkered around and found that you can do the following (assuming that your 2nd execution will return only 1 table):

dsOrder = SqlHelper.ExecuteDataset(cn_str_W, CommandType.StoredProcedure, "CT_getOrder", arParms)
dsOrder.Tables(0).TableName = "order"
dsOrder.Tables.Add(SqlHelper.ExecuteDataset(cn_str_Q, CommandType.StoredProcedure, "CT_getProduct", arParms).Tables(0))
dsOrder.Tables(1).TableName = "Product"
0
 

Author Comment

by:ommer
ID: 17099359
ZeonFlash,

When I use next line from your reply, do I use ...Tables(0) or ...Tables(1)? It seems neither works for me.

dsOrder.Tables.Add(SqlHelper.ExecuteDataset(cn_str_Q, CommandType.StoredProcedure, "CT_getProduct", arParms).Tables(0))

Thank a lot!
0
 
LVL 17

Accepted Solution

by:
ZeonFlash earned 50 total points
ID: 17100174
Yikes, oversight on my part.  You're probably getting a "DataTable already belongs to another DataSet" error.  You need to create a copy of the table to add to the dataset, not use the one returned by SqlHelper directly.  Try this:

dsOrder.Tables.Add(SqlHelper.ExecuteDataset(cn_str_Q, CommandType.StoredProcedure, "CT_getProduct", arParms).Tables(0).Copy)

0
 

Author Comment

by:ommer
ID: 17100786
Yap, that works. It will save me couple datasets. More importantly, I have learnt the dotnet way. Thanks!
0

Featured Post

[Webinar] Code, Load, and Grow

Managing multiple websites, servers, applications, and security on a daily basis? Join us for a webinar on May 25th to learn how to simplify administration and management of virtual hosts for IT admins, create a secure environment, and deploy code more effectively and frequently.

Question has a verified solution.

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

Suggested Solutions

Article by: jpaulino
XML Literals are a great way to handle XML files and the community doesn’t use it as much as it should.  An XML Literal is like a String (http://msdn.microsoft.com/en-us/library/system.string.aspx) Literal, only instead of starting and ending with w…
1.0 - Introduction Converting Visual Basic 6.0 (VB6) to Visual Basic 2008+ (VB.NET). If ever there was a subject full of murkiness and bad decisions, it is this one!   The first problem seems to be that people considering this task of converting…
In an interesting question (https://www.experts-exchange.com/questions/29008360/) here at Experts Exchange, a member asked how to split a single image into multiple images. The primary usage for this is to place many photographs on a flatbed scanner…
Finding and deleting duplicate (picture) files can be a time consuming task. My wife and I, our three kids and their families all share one dilemma: Managing our pictures. Between desktops, laptops, phones, tablets, and cameras; over the last decade…

734 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