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06.02.2008 at 09:54AM PDT, ID: 23450465
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4.2

Oracle Datareader Not Returning Contents of String Field

Asked by tlchavet in Microsoft Visual Basic.Net, Oracle Database, Microsoft Programming

Tags:

Hi,

I have an Oracle data reader that is not returning the contents of a string field when I have verified that the field contains data.  Here is the section of code where it happens:

NOTE: I have verified that the field BLB.OLE_OBJECT_BLOB is of type "STRING".

        Dim cmdText As Oracle.DataAccess.Client.OracleCommand
        Dim rsText As Oracle.DataAccess.Client.OracleDataReader

14900:              SQL = " SELECT BLB.OLE_OBJECT_BLOB, ATT.REFERENCE_SUB_NBR "
15000:              SQL = SQL & "FROM NUCLEAR.ATTRB_V ATT, NUCLEAR.BLOB_V blb "
15100:              SQL = SQL & "WHERE BLB.OLE_OBJECT_ID = ATT.OLE_ID_NOTES "
15200:              SQL = SQL & "AND ATT.REFERENCE_TYPE = 'WO' "
15300:              SQL = SQL & "AND ATT.ATTRIBUTE_NAME = 'B1 - WORK TASK SCOPE' "
15400:              SQL = SQL & "AND ATT.REFERENCE_NBR = '" & rsPM.Item("MODEL_WO_NUMBER") & "' "
15500:              SQL = SQL & "ORDER BY ATT.REFERENCE_SUB_NBR, BLB.GEN_ARG "

15600:              cmdText = New Oracle.DataAccess.Client.OracleCommand(SQL, cnDB)
15700:              rsText = cmdText.ExecuteReader()

16200:              If rsText.HasRows Then
16300:                  strWorkInst = ""
16400:                  Do While rsText.Read
16500:                      If rsText.Item("OLE_OBJECT_BLOB") <> ".                                                                            " Then
16600:                          If strWorkInst = "" Then
16700:                              strWorkInst = rsText.Item("REFERENCE_SUB_NBR") & ": " & Trim(rsText.GetString(0))
16800:                          Else
16900:                              strWorkInst = strWorkInst & Chr(10) & rsText.Item("REFERENCE_SUB_NBR") & ": " & Trim(rsText.Item("OLE_OBJECT_BLOB"))
17000:                          End If
17100:                      End If

17200:                  Loop

17400:                  oSheet.Cells(lngRow, j) = "'" & Left(strWorkInst, 31500)
17500:                  intWICol = j
17600:              End If

17700:              rsText.Close()

When I run the same select in TOAD the OLE_OBJECT_BLOB field returns a string - here it does not.  This is very urgent as it is hindering a production report.  Any help would be greatly appreciated.Start Free Trial
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About this solution

Zones: Microsoft Visual Basic.Net, Oracle Database, Microsoft Programming
Tags: Visual Studio 2005
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Solution Provided By: slightwv
Participating Experts: 2
Solution Grade: A
 
 
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