[Mono-bugs] [Bug 655504] New: InvalidOperationException in System.Data.DataSetExtensions

bugzilla_noreply at novell.com bugzilla_noreply at novell.com
Tue Nov 23 09:07:06 EST 2010



           Summary: InvalidOperationException in
    Classification: Mono
           Product: Mono: Runtime
           Version: 2.8.x
          Platform: Other
        OS/Version: Ubuntu
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: generics
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: r.shubovich at gmail.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---
           Blocker: ---

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; ru; rv:
Gecko/20101026 Firefox/3.6.12 ( .NET CLR 3.5.30729; .NET4.0E)

It is normal that CopyToDataTable routine fires InvalidOperationException when
no data rows returned from data sourse ?
My aspx pages never fires this exception under native (microsoft) environment.
I change routine as below and have no problems now:

                public static DataTable CopyToDataTable<T> (this IEnumerable<T>
                        where T : DataRow
                        DataTable dt = new DataTable ();
                        IEnumerator<T> e = source.GetEnumerator ();
                        if (e.MoveNext ())
                        //      throw new InvalidOperationException ("The
source contains no DataRows");
                        foreach (DataColumn col in e.Current.Table.Columns)
                                dt.Columns.Add (new DataColumn (col.ColumnName,
col.DataType, col.Expression, col.ColumnMapping));
                        CopyToDataTable<T> (source, dt,
                        return dt;

Reproducible: Always

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