Transactions made easy
Thursday, January 26th, 2012 at 19h58
A helper class for transaction enabled data write. It can be used as is, on backend databases which support transactions e.g. SQL server, Oracle and yes Access too. ...
General information
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A helper class for transaction enabled data write.


  • SetParameterValue - method supplies values to parameters in a sql query
  • ExecuteNonQuery - for use w/ SQLs that need to return the number of rows affected e.g. INSERT ...
  • ExecuteScalar - returns a value from a query SELECT COUNT(*) ...
  • ExecuteSql - for use w/ SQLs that return a DataTable
  • Commit() - Attempts to write everything from the transaction scope
  • Rollback() - Prevents everything in the transaction scope from being written to the underlying tables
  • IsCommitted- Property indicates save status:
    • True - indicates a successful commit operation.
    • False - indicates transaction roll back or uncommitted transactions.
Sample usage in the code:
    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim shipperNames As String() = {"First Shipping Company", "Second Shipping Company", "Third Shipping Company", Nothing}

        Using rs As New Framework_Code.TxnWrite("NorthwindConnectionString")
                For i As Byte = 0 To 3 ' Change this to 2 for a successful commit because CompanyName cannot be NULL/Nothing.
                    rs.SetParameterValue("CompanyName", shipperNames(i))
                    rs.ExecuteNonQuery("INSERT INTO Shippers (CompanyName) VALUES (@CompanyName)")
            Catch ex As Exception
            End Try
            Label1.Text = IIf(rs.IsCommitted, "Committed", "Rolledback")
        End Using

    End Sub
Created by
Denny Jacob
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Wednesday, March 14th, 2007 at 09h30
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