July 25, 2008 03:40pm pdt

1. jpaulino 645,715
2. TheLearn... 642,434
3. Sancler 370,108
4. Idle_Mind 368,987
5. PaulHews 349,257
6. Dhaest 293,974
7. Fernando... 258,085
8. jaime_oliv... 256,409
9. jcoehoorn 239,431
10. VBRocks 235,570
11. webtubbs 220,392
12. emoreau 216,722
13. vb_jonas 183,591
14. angelIII 170,840
15. GreenGho... 166,611

1. TheLearn... 4,096,917
2. Idle_Mind 3,446,139
3. Sancler 2,351,588
4. Fernando... 2,008,535
5. RonaldBie... 1,159,695
6. emoreau 1,032,045
7. jpaulino 995,082
8. iboutchkine 808,579
9. VBRocks 790,751
10. Chaosian 657,498
11. webtubbs 642,813
12. angelIII 637,547
13. PaulHews 636,298
14. planocz 617,745
15. arif_eqbal 596,164

04.11.2008 at 12:36PM PDT, ID: 23316251

	[x] Attachment Details

[x]

The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

The Grade of the Solution
The Zone Rank of the Expert Providing the Solution
The Number of Author and Expert Comments
The Number of Experts Contributing
The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!

9.4

The datatable.Rows.Contains() method does not find primary key

Zones: Microsoft Visual Basic.Net, .NET Framework 2.0

Tags: VB.NET ASP.NET 2

The datatable.Rows.Contains() method does not find the primary key value in the datatable and it definitely exists in the table.
I populated a datatable with a single column of values using a datareader, then set the PrimaryKey to column(0), the only column in the DataTable. The values are there, for sure (64 rows X 1 column), in the datatable, but the statement

If dtProdImportFields.Rows.Contains("ProductName") Then
'do something
End If

does not work at all (the Contains function completely ignores the value passed to it Or I am not using it correctly). The string "ProductName" is in the datatable and it is the PrimaryKey column and all values are unique, so I am stumped as to what may be going on.

Attached, is the code that generates the datatable (I think the problem may be that the PrimaryKey is somehow not being generated - though there are no errors)

Any ideas where I'm going wrong here?

         
           
           
             Protected Sub GetProdImportFields(ByRef dtbl As DataTable)
        Dim sqlstring As String = "SELECT SSFieldName FROM ProdImportFields"
        Using connection As New SqlConnection(DBconnstr)
            connection.Open()
            Using command As New SqlCommand(sqlstring, connection)
                Using reader As SqlDataReader = command.ExecuteReader()
                    dtbl.Load(reader, LoadOption.OverwriteChanges)
                End Using
            End Using
        End Using
        dtbl.PrimaryKey = New DataColumn() {dtbl.Columns(0)} 'this appears correct
    End Sub

           
         

Start your free trial to view this solution

Question Stats

Zone: Programming

Question Asked By: bd9000

Solution Provided By: VBRocks

Participating Experts: 1

Solution Grade: A

Translate:

Loading Advertisement...

20080236-EE-VQP-29 / EE_QW_2_20070628