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09.16.2008 at 03:05AM PDT, ID: 23734533
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8.9

OleDBConnection Update duplicates records in Access Table

Asked by ONEINVESTMENTS in .NET, Microsoft Access Database, Microsoft Visual Basic.Net

Tags: , , ,

I am trying to update an Access Table from VB.NET using OleDBConnection. It is working but every time it duplicated the records. Let's explain further.. If for example the table contains 1 row with the element "a", after adding a 1 row containing the element "b", the table elements are duplicated in a way that the table contains "a","a","b". If I try to add subsequentially the a row containing "c", the table will then contain "a","a","a","a","b","b","c" and so on... in other words that is already in the table is duplicated.
How can I avoid this? Here below is the code:
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Public Function InsertCompany(ByVal dt As DataTable)
        Dim i As Integer
        Dim CustRow As DataRow
        Dim dr(5000) As DataRow
        Dim adapter As OleDbDataAdapter = New OleDbDataAdapter("SELECT * FROM Customers", Conn)
 
        adapter.InsertCommand = New OleDbCommand("INSERT INTO Customers (SECID, BLOCK, ITEM, FY, V) VALUES(?, ?, ?, ?, ?);", Conn)
 
        adapter.InsertCommand.Parameters.Add("@SECIDBLP", OleDbType.VarChar, 50, "SECID")
        adapter.InsertCommand.Parameters.Add("@BLOCK", OleDbType.VarChar, 50, "BLOCK")
        adapter.InsertCommand.Parameters.Add("@ITEM", OleDbType.VarChar, 50, "ITEM")
        adapter.InsertCommand.Parameters.Add("@ITEM", OleDbType.Integer, 8, "FY")
        adapter.InsertCommand.Parameters.Add("@V", OleDbType.Double, 8, "V")
 
        adapter.AcceptChangesDuringFill = False
        adapter.MissingSchemaAction = MissingSchemaAction.AddWithKey
 
        Dim dcmID As New DataColumnMapping("SECID", "SECID")
        Dim dcmName As New DataColumnMapping("BLOCK", "BLOCK")
        Dim dcmITEM As New DataColumnMapping("ITEM", "ITEM")
        Dim dcmFY As New DataColumnMapping("FY", "FY")
        Dim dcmV As New DataColumnMapping("V", "V")
 
        Dim dtmTable As New DataTableMapping("Table", "Customers")
 
        dtmTable.ColumnMappings.Add(dcmID)
        dtmTable.ColumnMappings.Add(dcmName)
        dtmTable.ColumnMappings.Add(dcmITEM)
        dtmTable.ColumnMappings.Add(dcmFY)
        dtmTable.ColumnMappings.Add(dcmV)
 
        adapter.TableMappings.Add(dtmTable)
 
        Dim custDS As DataSet = New DataSet()
        adapter.Fill(custDS, "Table")
 
 
      
 
 
        For i = 1 To dt.Rows.Count - 1
            dr = dt.Select
            CustRow = custDS.Tables(0).NewRow()
            CustRow("SECID") = dr(i).Item(0).ToString
            CustRow("BLOCK") = dr(i).Item(1).ToString
            CustRow("ITEM") = dr(i).Item(2).ToString
            CustRow("FY") = dr(i).Item(3)
            CustRow("V") = dr(i).Item(4)
            custDS.Tables(0).Rows.Add(CustRow)
        Next i
 
        Try
            adapter.Update(custDS.GetChanges(), "Customers")
        Catch ex As Exception
            MessageBox.Show(ex.Message & " - " & ex.Source)
            Conn.Close()
        End Try
 
        custDS.AcceptChanges()
 
    End Function
[+][-]09.16.2008 at 08:18AM PDT, ID: 22489348

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[+][-]09.16.2008 at 08:36AM PDT, ID: 22489598

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[+][-]09.16.2008 at 08:40AM PDT, ID: 22489660

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[+][-]09.16.2008 at 09:13AM PDT, ID: 22490103

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[+][-]09.16.2008 at 09:17AM PDT, ID: 22490156

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About this solution

Zones: .NET, Microsoft Access Database, Microsoft Visual Basic.Net
Tags: Microsoft, VB.NET, 2005, Connect to Access 2003
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Solution Provided By: CodeCruiser
Participating Experts: 1
Solution Grade: B
 
 
 
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