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Old November 4th, 2003, 11:01 AM
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Default Failed to enable constraints


I am making an interface from VB.NET to Micro's Access. I am using an SQL statement to pull a name from a table depending on the number entered in the interface:

     select first_name from val_stu where patron_id = " & (Val(txtNumber.Text))

I get the error on the line with the code:

     OleDataAdapter3.Fill(DataSet31, "val_stu")

The error is:

     "An unhandled exception of type 'System.Data.Constraint Exception' occuered in tsystem.data.dll

      Additional information: Failed to enable constraints. One or more rows contain values violating non-null, unique or foreign-key constraints"

Does anyone know what this means and how I can solve the problem.


lab assistant

Old November 4th, 2003, 11:19 AM
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Sorry to post all.

I figured out the problem. It was my SQL stament.

The statement should have been "select * from val_stu " not "select first_name from".

Hope my dumb mistake helps someone else out int the future.

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