非常简单的ssis脚本转换，使Object引用不设置为对象的实例

Question

我有一个ssis包，它接受一个平面文件并将其转储到SQL。在此过程中，150列需要“ - ”和“。”从他们身上移除。我使用脚本转换完成了这个。

    Public Overrides Sub Input0_ProcessInputRow(ByVal Row As Input0Buffer)
    Dim column As IDTSInputColumn90
    Dim rowType As Type = Row.GetType()
    Dim columnValue As PropertyInfo

    For Each column In Me.ComponentMetaData.InputCollection(0).InputColumnCollection

        columnValue = rowType.GetProperty(column.Name)

        Dim strCol As String = columnValue.GetValue(Row, Nothing).ToString()
        If Not String.IsNullOrEmpty(strCol) Then
            strCol = strCol.Replace("-", "").Replace(".", "")
            columnValue.SetValue(Row, strCol, Nothing)
        End If
    Next
End Sub

但是我在运行时遇到以下错误

对象引用未设置为对象的实例。

at ScriptComponent_f20c21e11e3348378ef0bbe6b65e9c05.ScriptMain.Input0_ProcessInputRow(Input0Buffer Row)
at ScriptComponent_f20c21e11e3348378ef0bbe6b65e9c05.UserComponent.Input0_ProcessInput(Input0Buffer Buffer)
at ScriptComponent_f20c21e11e3348378ef0bbe6b65e9c05.UserComponent.ProcessInput(Int32 InputID, PipelineBuffer Buffer)
at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.ProcessInput(Int32 inputID, PipelineBuffer buffer)

我无法弄清楚为什么会发生这种情况..有什么想法吗？

编辑我发现这一行是问题

Dim strCol As String = columnValue.GetValue(Row, Nothing).ToString()

Answer 1

我能够让它为我的数据集工作。我跳过了转换为字符串类型，只是将其保留为对象类型based on what I assume to be the source of your script。它不漂亮，但它似乎完成了工作。

Public Overrides Sub Input0_ProcessInputRow(ByVal Row As Input0Buffer)
    Dim column As IDTSInputColumn90
    Dim rowType As Type = Row.GetType()
    Dim columnValue As PropertyInfo

    For Each column In Me.ComponentMetaData.InputCollection(0).InputColumnCollection

        columnValue = rowType.GetProperty(column.Name)
        Dim meta As Integer = column.ExternalMetadataColumnID
        Try
            Dim Obj As Object = columnValue.GetValue(Row, Nothing)
            If Not String.IsNullOrEmpty(Obj) Then
                Obj = Obj.Replace("-", "").Replace(".", "")
                columnValue.SetValue(Row, Obj.ToString(), Nothing)
            End If
        Finally
            ' Rejoice in our null-ness
        End Try
    Next
End Sub

源数据

从这个数据开始

SourceSSN,DestinationSSN,Amount
,111-11-0000,5000.00
111-22-3333,111-22-3334,5000.00
121-22-3333,121-22-3334,5000.00
123-22-3333,123-22-3334,5000.00
124-22-3333,124-22-3334,5000.00

上面的脚本使这个