ScriptBuffer.SetNull 方法
Makes the value of the specified column nullnull 參考 (在 Visual Basic 中為 Nothing).
命名空間： Microsoft.SqlServer.Dts.Pipeline
組件： Microsoft.SqlServer.TxScript (在 Microsoft.SqlServer.TxScript.dll 中)
語法
'宣告
Protected Sub SetNull ( _
ColumnIndex As Integer _
)
'用途
Dim ColumnIndex As Integer
Me.SetNull(ColumnIndex)
protected void SetNull(
int ColumnIndex
)
protected:
void SetNull(
int ColumnIndex
)
member SetNull :
ColumnIndex:int -> unit
protected function SetNull(
ColumnIndex : int
)
參數
- ColumnIndex
型別：System.Int32
The index of the column.
備註
The Script component developer does not use the ScriptBuffer class directly, but indirectly, through the derived classes in the BufferWrapper project item that represent the component's input and outputs.
The developer does not have to use the SetNull method, because the derived classes contain a <ColumnX>_IsNull property for each column that you can use to specify a null value.
範例
The following sample code from the autogenerated BufferWrapper project item demonstrates how the Script component uses the SetNull method.
Public WriteOnly Property [city_IsNull] As Boolean
Set
SetNull(1)
End Set
End Property