SetNull 方法
Assigns nullNothingnullptrunitnull 引用（在 Visual Basic 中为 Nothing） to a buffer column.
命名空间： Microsoft.SqlServer.Dts.Pipeline
程序集： Microsoft.SqlServer.PipelineHost（在 Microsoft.SqlServer.PipelineHost.dll 中）
语法
声明
Public Sub SetNull ( _
columnIndex As Integer _
)
用法
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
)
参数
- columnIndex
类型：System. . :: . .Int32
The index of the column in the buffer row.
注释
The SetNull method assigns null Nothing nullptr unit null 引用（在 Visual Basic 中为 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:
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 在数据流中使用数据类型.