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Excel CopyFromRecordset issue

Posted on 2010-08-26
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Last Modified: 2012-05-10
Hello,
I'm using Excel automation in a DCOM for my classic asp application and I am getting "Access Denied" error when one of the columns from the recordset has a very long string. I found that out when I change my Select statement to retrieve different date range and one of the result contained a long string. I am not able to find out what is the limit length of the Cell in MS automation object. However, I can put a very long string (10000 chars) in a interactive Excel sheet. This is happening in Excel 2003

My question is how to overcome this with minimal code change? The same function is still working under Excel 2000.

Thank you.
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Question by:KingstonDeveloper
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by:Patrick Matthews
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KingstonDeveloper,The maximum number of characters in a single cell is 32,767.  Any chance you have a string longer than that?Patrick
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Author Comment

by:KingstonDeveloper
Comment Utility
Hi Matt,

Thanks for the quick response. I run the query in the Query Analyzer and the string I get from this is only a little less than 3000 chars (include spaces).

Thanks again
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Author Comment

by:KingstonDeveloper
Comment Utility
Okay, I have a result with 2400 chars and it still fails.
However, I got one that works with 896 chars.
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LVL 92

Expert Comment

by:Patrick Matthews
Comment Utility
I found an old thread at MrExcel in which it appears that using CopyFromRecordset is problematic when you have a text field exceeding 255 characters:http://www.mrexcel.com/forum/showthread.php?t=160922If you alter yur recordset construction so that it only gets the first 255 characters, i.e., Left(SomeColumn, 255), does it work?
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Patrick Matthews earned 250 total points
Comment Utility
OK, found the limit: it's 911 characters.  Seems that this is peculiar to Excel 2003, and not a problem with other versions.http://support.microsoft.com/kb/818808/en-usI am afraid that you'll have to loop through the recordset row by row, column by column and put the values in that way.  Inefficient and slow, but should work.Not sure what it looks like in ASP, but in VBA...
DestRow = 1

Do Until rs.EOF

    With ActiveSheet

        For ColumnCounter = 1 To rs.Fields.Count

            If DestRow > 1 Then

                .Cells(DestRow, ColumnCounter) = rs.Fields(ColumnCounter - 1).Value

            Else

                .Cells(DestRow, ColumnCounter) = rs.Fields(ColumnCounter - 1).Name

            End If

        Next

    End With

    DestRow = DestRow + 1

    rs.MoveNext

Loop

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LVL 92

Expert Comment

by:Patrick Matthews
Comment Utility
Assuming that this problem is specific to Excel 2003 (it seems to be)...
If xlApp.Version = 11 Then

    DestRow = 1

    Do Until rs.EOF

        With xlApp.ActiveSheet

            For ColumnCounter = 1 To rs.Fields.Count

                If DestRow > 1 Then

                    .Cells(DestRow, ColumnCounter) = rs.Fields(ColumnCounter - 1).Value

                Else

                    .Cells(DestRow, ColumnCounter) = rs.Fields(ColumnCounter - 1).Name

                End If

            Next

        End With

        DestRow = DestRow + 1

        rs.MoveNext

    Loop

Else

    With xlApp.ActiveSheet

        For ColumnCounter = 1 To rs.Fields.Count

            .Cells(DestRow, ColumnCounter) = rs.Fields(ColumnCounter - 1).Name

        Next

        .Cells(2, 1).CopyFromRecordset rs

    End With

End If

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Author Closing Comment

by:KingstonDeveloper
Comment Utility
Thanks Matt. Looks like I will have to do the loop...Yikes
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