Solved

Datatable created with the DATASET designer return 0 row

Posted on 2014-10-07
6
119 Views
Last Modified: 2014-10-20
I have a problem with a datatableadapter in a c# form using Visual Studio 2013.

All of my datatableadapter are working perfectly except one.

In the Query Builder when I construct the SQL query and testing the result, the data appear correctly. I am getting rows.
In the same datatableadapter, in the preview window, I am writing both parameters and it return zero row. When executing the code, it return zero row.

This is a query on a view.

SELECT        CustID, OfficeRelationID, OfficeID, PostalBox, Facility, FloorCode, RoomNumber
FROM            viewOffices
WHERE        (CustID = @CustID) AND (Facility = @Facility)

                    // Set the Office Room Number
                    DataSet1TableAdapters.viewOfficesTableAdapter daOffice = new DataSet1TableAdapters.viewOfficesTableAdapter();
                    DataSet1.viewOfficesDataTable dtOffice = daOffice.GetData(profiles[0].CustID, profiles[0].PrimaryFacility);
                    if (dtOffice.Rows.Count > 0)
                    {
                        if (dtOffice[0].RoomNumber.Length > 0) 

Open in new window


I am using the same method with many other tableadapter and they all working perfectly.

viewoffice.JPG
Query Builder
QueyBuilder.JPG
Preview Data
PreviewData.JPG
Thanks for any help
viewoffice.JPG
0
Comment
Question by:SergeGregoire
  • 3
  • 2
6 Comments
 
LVL 40

Expert Comment

by:Vadim Rapp
ID: 40368351
Almost certainly there's something wrong with the parameters, so I would start with examining their properties and ensuring that they correspond to the datatype in the database, and have correct length.

If that does not help, next I would try two things:

1. right-click on "getdata" in the code, and go to "definition"*; this will open up the actual code generated by the wizard for that. Inspect it closely.
2. run Profiler on sql server, and find out what query was sent by preview and what was sent by the code. Find out the difference.

#2 is somewhat more involved, but it's the most powerful, you will see the difference at once.


*) that's how it works in VB that I use. Maybe in C# it's different.
0
 
LVL 28

Expert Comment

by:sammySeltzer
ID: 40368786
It is really hard to tell what the issue is from your screenshots and code snips.

I can only fashion a guess that perhaps, you need to make sure that the parameters you are passing to your report have the same case level as your sql.

For instance, in your sql, you have @Facility.

My experience tells me that if I pass @facility to my report, it won't work because it is looking for same proper case of F instead of f.

Also, make sure you are pointing to correct database and table.
0
 
LVL 1

Author Comment

by:SergeGregoire
ID: 40387375
Hi,

Sorry, I am very busy.

I used a datareader as a work around, but I will try your ideas with the Dataset next week.
0
PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

 
LVL 1

Author Comment

by:SergeGregoire
ID: 40392233
I ran the profiler and it looks like there is a bug in the dataset.

When I run the query from the Query Builder, I am getting the correct result and the data profiler show the following info:

exec sp_executesql N'SELECT CustID, OfficeRelationID, OfficeID, PostalBox, Facility, FloorCode, RoomNumber FROM viewOffices WHERE (CustID = @CustID) AND (Facility = @Facility)',N'@CustID nvarchar(7),@Facility nvarchar(8)',@CustID=N'0005543',@Facility=N'MONTREAL'

Open in new window


When preview the data from the Table Adapter dataset design view, I am getting no result and noticed that the CustID is missing the last digit as shown in the following result.

exec sp_executesql N'SELECT        CustID, OfficeRelationID, OfficeID, PostalBox, Facility, FloorCode, RoomNumber
FROM            viewOffices
WHERE        (CustID = @CustID) AND (Facility = @Facility)',N'@CustID nvarchar(6),@Facility nvarchar(50)',@CustID=N'000554',@Facility=N'MONTREAL'

Open in new window


I finally use a datareader as shown in the following code:
                    string queryString = "SELECT CustID, OfficeRelationID, OfficeID, PostalBox, Facility, FloorCode, RoomNumber FROM viewOffices WHERE (CustID = '" + strCustID + "') AND (Facility = '" + strFacility + "')";
                    using (var connection = new SqlConnection(connStr))
                    {
                        var command = new SqlCommand(queryString, connection);
                        connection.Open();
                        using (var reader = command.ExecuteReader())
                        {
                            while (reader.Read())
                            {

Open in new window


I can't explain why the last digit of the parameter is lost, but the datareader way is working fine and I will use this method.

Thanks for the suggestions.
0
 
LVL 40

Accepted Solution

by:
Vadim Rapp earned 500 total points
ID: 40392315
I would check the Parameter of the query in Designer, chances are it has specified maximum length=6, so it gets cut off.
sample
0
 
LVL 1

Author Closing Comment

by:SergeGregoire
ID: 40392774
That was the problem. You are the King.

Thank you very much.
0

Featured Post

What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

Question has a verified solution.

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

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…
This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
Via a live example, show how to backup a database, simulate a failure backup the tail of the database transaction log and perform the restore.
Via a live example, show how to shrink a transaction log file down to a reasonable size.

919 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

20 Experts available now in Live!

Get 1:1 Help Now