Question

Vb.net error when calling Oracle stored procedure with an out paramter using Microsoft Oracle Managed Data Provider

Asked by: ggcomo

I'm using VB.Net to connect to Oracle with the Mocrosoft managed data provider for Oracle.  I can connect to the database and run a query and get data back with no problem.  Now I need to call a stored procedure thate has 2 paramters.  The first one is a varchar input paramter and the second one is a number output parameter.  My code is below.  When the app gets to the myCommand.ExecuteNonQuery() statement I get the following error:

An unhandled exception of type 'System.Data.OracleClient.OracleException' occurred in system.data.oracleclient.dll

Additional information: System error.

The examples I've found match my syntax and I've got no clue what else to try.

        Dim document_id As Integer
        Dim myConnection As New OracleConnection
        Dim myCommand As New OracleCommand

        connString = "data source=HOLMES;user id=LINE_HOST;password=LINE_HOST"
        myConnection.ConnectionString = connString
        myCommand.Connection = myConnection
        myCommand.CommandText = "test_for_new_document"
        myCommand.CommandType = CommandType.StoredProcedure
        myCommand.Parameters.Add(New OracleParameter("thesource_path", OracleType.VarChar)).Value = SourceFileName
        'myCommand.Parameters("thesource_path").Direction = ParameterDirection.Input
        'myCommand.Parameters("thesource_path").Value = SourceFileName
        myCommand.Parameters.Add(New OracleParameter("the_document_number", OracleType.Number))
        myCommand.Parameters("the_document_number").Direction = ParameterDirection.Output
        myConnection.Open()
        myCommand.ExecuteNonQuery()
        document_id = myCommand.Parameters(1).Value
        myConnection.Close()
       
Any help would be greatly appreciated.

Thanks.

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Asked On
2005-01-27 at 09:47:02ID21291278
Tags

oracle

,

procedure

Topics

Microsoft Visual Basic.Net

,

Adobe Type Manager

Participating Experts
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Answers

 

by: toddhdPosted on 2005-01-27 at 10:19:17ID: 13155211

If you could wrap it in a Try/Catch and gives us the error message, it would help greatly:

     Dim document_id As Integer
        Dim myConnection As New OracleConnection
        Dim myCommand As New OracleCommand
Try
        connString = "data source=HOLMES;user id=LINE_HOST;password=LINE_HOST"
        myConnection.ConnectionString = connString
        myCommand.Connection = myConnection
        myCommand.CommandText = "test_for_new_document"
        myCommand.CommandType = CommandType.StoredProcedure
        myCommand.Parameters.Add(New OracleParameter("thesource_path", OracleType.VarChar)).Value = SourceFileName
        'myCommand.Parameters("thesource_path").Direction = ParameterDirection.Input
        'myCommand.Parameters("thesource_path").Value = SourceFileName
        myCommand.Parameters.Add(New OracleParameter("the_document_number", OracleType.Number))
        myCommand.Parameters("the_document_number").Direction = ParameterDirection.Output
        myConnection.Open()
        myCommand.ExecuteNonQuery()
        document_id = myCommand.Parameters(1).Value
        myConnection.Close()
Catch ex as OracleException
msgbox(ex.Message>
End Try

 

by: toddhdPosted on 2005-01-27 at 10:20:57ID: 13155229

ooops - msgbox(ex.Message)

Also you might need to spell out the exception type, ie:

Catch ex As System.Data.OracleClient.OracleException

If that doesn't work, then just catch the error as a general Exception if possible

 

by: toddhdPosted on 2005-01-27 at 10:24:02ID: 13155256

Also, I've never touched an Oracle Server, but those Params are strange? And how about this one?
myCommand.Parameters.Add(New OracleParameter("the_document_number", OracleType.Number))

You gave a string, and said it's a number. I assume you replacing the actual values with the placeholders, or is this the ACTUAL code?

 

by: BrianWrenPosted on 2005-01-27 at 10:26:09ID: 13155273

I have gotten errors before for not declaring the size of the VARCHAR when calling a stored procedure..
I’m pretty confident that the error is coming from Oracle, but with all the layers and wrappers involved, it’s hard to be 100% sure...

In the statement “document_id = myCommand.Parameters(1).Value” I would use the parameter’s name, rather than its ordinal position (since you named it, after all), to make the code easier to read.

Does the connection have an Error collection that you can investigate?

 

by: ggcomoPosted on 2005-01-27 at 11:18:23ID: 13155875

getting error ORA-06550: line 1 column7
PLS-00306: wrong number or types of arguments in call to 'TEST_FOR_NEW_DOCUMENT'


Here's the Oracle procedure


create or replace procedure test_for_new_document
(thesource_path in varchar2,the_document_number out number)
is
CNT NUMBER;
thedoc number;
begin
  SELECT COUNT(*)
  INTO CNT
  FROM LINE_HOST.ELECTRONIC_DOCUMENT
  WHERE SOURCE_PATH = thesource_path;
  IF CNT = 0
  THEN
     SELECT LINE_HOST.E_DOCUMENT_NUM.NEXTVAL
     INTO the_document_number
     FROM DUAL;
     COMMIT;
  ELSE
    SELECT E_D_NUMBER
    INTO the_document_number
    FROM LINE_HOST.ELECTRONIC_DOCUMENT
     WHERE SOURCE_PATH = thesource_path;
  END IF;
end;

 

by: slightwvPosted on 2005-01-27 at 11:24:06ID: 13155943

I'm not familiar with this provider (we use ODP.Net) but try setting up lengths on the parameters:

myCommand.Parameters.Add(New OracleParameter("thesource_path", OracleType.VarChar,100)).Value = SourceFileName
myCommand.Parameters.Add(New OracleParameter("the_document_number", OracleType.Number, 16))

Can you also post the dim of SourceFileName?  It might be wigging out if it's dimmed as String.....

 

by: ggcomoPosted on 2005-01-28 at 06:07:30ID: 13163101

Thanks for your help.  I got it to work.

 

by: slightwvPosted on 2005-01-28 at 06:30:44ID: 13163316

For future questions on this topic, can you post the solution so it can be out here for all to see?

 

by: slightwvPosted on 2005-02-28 at 05:18:01ID: 13419209

My 2 cents:
3-way split:   toddhd, BrianWren and slightwv
Since I can only assume that one or more of our suggestions helped answer the question.

20120131-EE-VQP-002

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