Exception copying dataset

[Corey Wirun]

Hi All,

I've got a puzzling situation. I have a strongly-typed DataSet with 3
tables which I want to copy into a generic DataSet. So I do this:

DataSet ds = null;
StrongDataSet dsStrong = new StrongDataSet();
Dosomething( ref dsStrong );

ds = dsStrong.Copy();

An exception is thrown on the copy (following). I dump the strong dataset
to an XML file previously and it looks fine.

at System.Data.Index.Sort(Int32 left, Int32 right)
at System.Data.Index.Sort(Int32 left, Int32 right)
at System.Data.Index.Sort(Int32 left, Int32 right)
at System.Data.Index.Sort(Int32 left, Int32 right)
at System.Data.Index.Sort(Int32 left, Int32 right)
at System.Data.Index.Sort(Int32 left, Int32 right)
at System.Data.Index.Sort(Int32 left, Int32 right)
at System.Data.Index.InitRecords()
at System.Data.Index..ctor(DataTable table, Int32[] indexDesc,
DataViewRowState recordStates, IFilter rowFilter)
at System.Data.DataTable.GetIndex(Int32[] indexDesc, DataViewRowState
recordStates, IFilter rowFilter)
at System.Data.DataColumn.get_SortIndex()
at System.Data.DataColumn.IsNotAllowDBNullViolated()
at System.Data.DataSet.EnableConstraints()
at System.Data.DataSet.set_EnforceConstraints(Boolean value)
at System.Data.DataSet.Copy()
at Ahlapi.CAhlapi.GetPlantReport(PlantReportTypeEnum type, ArrayList
reportParams, DataSet& ds) in e:\devel\ahlapi\cahlapi.cs:line 664
2004-06-29 09:59:14,187 [2876] FATAL Ahlapi.CAhlapi [] - Index was outside
the bounds of the array.
2004-06-29 09:59:15,265 [2876] FATAL Ahlapi.CAhlapi [] - System.Data

Any ideas anyone!

Thanks!
Corey.

 

[Corey Wirun]

FYI, I tried:

dsStrong.AcceptChanges()

on the DataSet before the copy and I got the same exception as well. So
something is a little flaky on the DataSet?

Corey.

 

[Corey Wirun]

Okay, I had a closer look at the source DataSet, and there were some NaN
columns. Turns out I was doing a divide by zero in the calculation of one
of the columns.

I don't know why an exception wasn't thrown on the divide - leading to the
NaN getting saved in the table, but fixing it fixed my Copy problem.

Ergh.
Corey.