OracleCommand更新不提交更改

Question

我正在使用以下代码在oracle中更新表。它会执行，但更新不会提交。如果我用Oracle SQL Developer运行查询，它工作得很好。我遗漏了什么？SELECT语句按预期工作。

` `Dim As String = txtBillOfLadingNumber.Text.Trim

    Dim TrailerNumber As String = txtTrailerNumber.Text.Trim
    Dim CarrierCode As String = txtCarrierCode.Text.Trim
   Dim TransportationMethod As String = txtTransportationMethod.Text.Trim 
   Dim OracleCommand As New OracleCommand()
    With OracleCommand
        .Connection = OracleConnection
        .CommandType = CommandType.Text
        .CommandText = "UPDATE XXF_ASN_HEADERS SET BILL_OF_LADING_NUMBER ='" + BillOfLadingNumber + "',TRAILER_NUMBER ='" + TrailerNumber + "',CARRIER_CODE ='" + CarrierCode + "',TRANSPORTATION_METHOD ='" + TransportationMethod + "' WHERE HEADERID ='" + Request.QueryString("HeaderId") + "'"
    End With

    OracleConnection.Open()
    Dim result As Integer = OracleCommand.ExecuteNonQuery()
    OracleConnection.Close()

    If result = 1 Then Response.Redirect("default.aspx")`

Answer 1

感谢你们为我指明了正确的方向。这是最终的工作代码。诀窍是使用OracleTransaction，下面的代码工作得很棒。接下来是参数的使用。欲获知更多信息，请访问here。

            Using dbConnection As New OracleConnection(OracleConnectionString)

                'Open the connection
                dbConnection.Open()

                Dim dbCommand As OracleCommand = dbConnection.CreateCommand()
                Dim dbTransaction As OracleTransaction

                'Start a local transaction 
                dbTransaction = dbConnection.BeginTransaction(IsolationLevel.ReadCommitted)
                'Assign transaction object for a pending local transaction
                dbCommand.Transaction = dbTransaction

                Try
                    dbCommand.CommandType = CommandType.Text
                    dbCommand.CommandText = "UPDATE XXF_ASN_HEADERS SET BILL_OF_LADING_NUMBER ='" + BillOfLadingNumber + "', TRAILER_NUMBER ='" + TrailerNumber + "', CARRIER_CODE ='" + CarrierCode + "', TRANSPORTATION_METHOD ='" + TransportationMethod + "' WHERE HEADERID ='" + Request.QueryString("HeaderId") + "'"
                    dbCommand.ExecuteScalar()
                    dbTransaction.Commit()
                    Response.Redirect("default.aspx")
                Catch ex As OracleException
                    'Rollback the transaction
                    dbTransaction.Rollback()
                    'display error details
                    lblUpdateQuery.Text = dbCommand.CommandText
                    lblDebug.Text = ex.Message.ToString
                End Try

            End Using

Answer 2

我正在做的项目也使用OracleCommand。最大的区别在于，我们所有的数据库调用都转到存储过程，而不是直接更改数据库的动态sql。最有可能的是，您需要将update语句包装在"BEGIN“和"END”块中，并可能添加"COMMIT;“语句。

不过要当心了。如果您将回车符和换行符放入CommandText中，则至少有一个版本的.NET库将失败。只是用分号来分隔。