Crystal Reports SetDataSource Method



In upgrading a Windows Forms project from 2003 to 2005 in VB.Net, I have
errors in setting the datasource for all of my embedded Crystal Report

What was working in 1.1 was

If Me.myDataAdapter.Fill(Me.myDataSet.myDataTable) > 0 Then
Dim oRpt As ReportClass = New myReport
Me.CrystalReportViewer1.ReportSource = oRpt
Else : GoTo NODATA

End If

On conversion, every one of these method calls gives the error:

error BC30521: Overload resolution failed because no accessible
'SetDataSource' is most specific for these arguments:
'Public Overridable Sub SetDataSource(dataTable As
System.Data.DataTable)': Not most specific.

Any help on how to fix this would be appreciated. Thanks.



Linda Liu [MSFT]

Hi John,

Thank you for posting.

In VS2005, the SetDataSource() method of a CrystalReport has has four
override functions. They are SetDataSource(DataSet),
SetDataSource(DataTable), SetDataSource(IDataReader) and
SetDataSource(IEnumerable). If you pass a strong-typed DataTable to the
SetDataSource() method like the following:
oRpt.SetDataSource(Me.myDataSet.myDataTable), the VS2005 compiler consider
this call ambiguous between the SetDataSource(DataTable) method and the
SetDataSource(IEnumerable) method.

To fix the problem, you should cast the datatable instance to DataTable
type. The following is a sample.


Hope this is helpful to you.
If you have any other concerns or need anything else, please don't hesitate
to let me know.

Linda Liu
Microsoft Online Community Support

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