通过

ScriptBuffer.SetNull Method

  • 项目

Makes the value of the specified column null.

命名空间: Microsoft.SqlServer.Dts.Pipeline
程序集: Microsoft.SqlServer.TxScript (in microsoft.sqlserver.txscript.dll)

语法

声明
Protected Sub SetNull ( _
    ColumnIndex As Integer _
)

protected void SetNull (
    int ColumnIndex
)

protected:
void SetNull (
    int ColumnIndex
)

protected void SetNull (
    int ColumnIndex
)

protected function SetNull (
    ColumnIndex : int
)

参数

  • ColumnIndex
    The index of the column.

备注

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.

示例

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

线程安全

Any public static (Shared in Microsoft Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

平台

开发平台

有关支持的平台列表，请参阅安装 SQL Server 2005 的硬件和软件要求。

目标平台

有关支持的平台列表，请参阅安装 SQL Server 2005 的硬件和软件要求。

请参阅

参考

ScriptBuffer Class
ScriptBuffer Members
Microsoft.SqlServer.Dts.Pipeline Namespace