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Excel CopyFromRecordset issue

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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KingstonDeveloper
Asked:
KingstonDeveloper
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1 Solution
 
Patrick MatthewsCommented:
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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KingstonDeveloperAuthor Commented:
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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KingstonDeveloperAuthor Commented:
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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Patrick MatthewsCommented:
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 MatthewsCommented:
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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Patrick MatthewsCommented:
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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KingstonDeveloperAuthor Commented:
Thanks Matt. Looks like I will have to do the loop...Yikes
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