SetNull 方法

Assigns nullNothingnullptrunitnull 參考 (在 Visual Basic 中為 Nothing) to a buffer column.

命名空間：  Microsoft.SqlServer.Dts.Pipeline
組件：  Microsoft.SqlServer.PipelineHost (在 Microsoft.SqlServer.PipelineHost.dll 中)

語法

'宣告
Public Sub SetNull ( _
    columnIndex As Integer _
)
'用途
Dim instance As PipelineBuffer
Dim columnIndex As Integer

instance.SetNull(columnIndex)

public void SetNull(
    int columnIndex
)

public:
void SetNull(
    int columnIndex
)

member SetNull : 
        columnIndex:int -> unit 

public function SetNull(
    columnIndex : int
)

參數

• columnIndex
  型別：System. . :: . .Int32
  The index of the column in the buffer row.

備註

The SetNull method assigns null Nothing nullptr unit null 參考 (在 Visual Basic 中為 Nothing) to the buffer column specified by the columnIndex parameter.

This method works with the DT_NULL data type in Integration Services.

You can use the SetNull method to insert a null value into a column of any type except for the BLOB data types:

• DT_IMAGE

• DT_NTEXT

• DT_TEXT

For a complete list of Integration Services data types and the corresponding Get and Set methods of the PipelineBuffer class to use with each type, see 使用資料流程中的資料類型.

請參閱

參考

PipelineBuffer 類別

Microsoft.SqlServer.Dts.Pipeline 命名空間