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Datatable Constraints

Posted on 2014-10-27
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Last Modified: 2014-11-24
OK, so I need to fill a datatable from my dataset...but I keep getting Constraints due to my primary key.
It works fine if I run it in the DataSet window...why I can't I fill an empty datatable with this information?

See screen shots!

        Dim ClientList As New RPS_EIPDataSetTableAdapters.tbl_ClientListTableAdapter
        Dim ClientListTable As New DataTable
Preview Data        This is when I get the error:
        ClientListTable = ClientList.GetDataBy_ClientID(CType(cb_ClientList.SelectedValue, Int32))


Thanks,
Mark
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Question by:smithmrk
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LVL 83

Expert Comment

by:CodeCruiser
ID: 40411247
Is your primary key set on ClientNum column? That column has duplicate values so error is understandable.
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Author Comment

by:smithmrk
ID: 40413278
Yes, but how can I put the information from the database into a BLANK DataTable that doesn't have any primary keys?
I don't want to take the primary key off my real database...I just want to put the results of the query into a BLANK Database with NO Constraints.

Mark
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LVL 83

Accepted Solution

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CodeCruiser earned 2000 total points
ID: 40453693
The reason you get this error is that the method call is returning a typed datatable. That typed data table has all the constraints configured same as in database. The fact that you are assigning the result to an untyped datatable does not help as the function still has to populate and return a typed datatable.

Solution would be to either change the query so that it does not return duplicates or to use a separate method which does not use the typed datatable.
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Author Closing Comment

by:smithmrk
ID: 40463039
OK, Thanks!

Mark
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