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Converting VBA database (Oracle) code to C#

Posted on 2011-09-12
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Last Modified: 2012-06-21
I have the attached working VBA code that retrieves data from an Oracle database and inserts it into an Excel Workbook, in a given column. I need to covert this to C#. And while C# is my primary language, I have never done ADO.NET with Oracle, just Access and SQL Server.

Please provide me the objects I'll need to create the connection, execute the query and retrieve the data.

Is it simply OleDbConnection, OleDbCommand, etc.?


Thanks.

 
Private Sub Worksheet_SelectionChange(ByVal Target As Range)
            Dim Myconnection As Connection
            Dim Myrecordset As Recordset
            Dim MyWorkbook As String
    
            'Open database connection
            Set MyDatabase = New ADODB.Connection
            MyDatabase.ConnectionString = "Driver={Oracle in OraClient11g_home1};Data Source=OUR_TEST devsvr;User ID=OUR_TEST;Password=password1;"
    
            'Open the database
            MyDatabase.Open
    
            Set Myrecordset = New Recordset
     
            'Build a custom query using command object
            Set MyCommand = New ADODB.Command
            With MyCommand
               Set .ActiveConnection = MyDatabase
               .CommandType = adCmdText
               .CommandText = "SELECT DESCRIPTION FROM thickness WHERE ACTIVE_INDICATOR_LF = 'Y' ORDER BY DESCRIPTION DESC"
            End With
            Myrecordset.Open MyCommand, , adOpenDynamic, adLockReadOnly


            Set Rng = Worksheets("SelectionsDB").Range("A5")
            For Each fld In Myrecordset.Fields
                     Rng.Value = fld.Name
                    Set Rng = Rng.Offset(, 1)
            Next fld
    
            Worksheets("SelectionsDB").Range("A6").CopyFromRecordset Myrecordset

            Myrecordset.Close
    
            MyDatabase.Close

        End Sub

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Question by:newbieweb
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Accepted Solution

by:
slightwv (䄆 Netminder) earned 500 total points
ID: 36524581
>>Is it simply OleDbConnection, OleDbCommand, etc.?

I would strongly suggest you migrate to Oracle's .Net provider, ODP.Net.

There are tons of examples using C# and ODP.Net for you to reference.  The install actually comes with samples.

You can download the ODAC from:
http://www.oracle.com/technetwork/developer-tools/visual-studio/downloads/index.html

If you have a specific question on how to do something, please ask but this site really isn't set up to port portions of code for people.
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Author Comment

by:newbieweb
ID: 36525204
Thanks. I was really looking for the names of the objects to use in C#. I am glad you mentioned ODP.NET, since that would changes the database ohjects I decide on.

Could you describe one or two big advantages of using ODP.NET over OleDb?


Thanks.

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Author Closing Comment

by:newbieweb
ID: 36525333
Thanks!
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LVL 76

Expert Comment

by:slightwv (䄆 Netminder)
ID: 36530394
>>one or two big advantages of using ODP.NET over OleDb?

Sorry.  I was out yesterday.

The biggest advantage is:  OleDB is old-school and is pretty much dead.  When using .Net, you should use drivers specifically designed to run with .Net.
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