PipelineBuffer.Item Property

Gets the data stored in a buffer column.

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

语法

声明
Public Default Property Item ( _
    columnIndex As Integer _
) As Object

public Object this [
    int columnIndex
] { get; set; }

public:
property Object^ default [int] {
    Object^ get (int columnIndex);
    void set (int columnIndex, Object^ value);
}

/** @property */
public Object get_Item (int columnIndex)

/** @property */
public void set_Item (int columnIndex, Object value)

参数

• columnIndex
  The index of the column in the buffer row.

属性值

The data stored in the buffer column as an object.

备注

The value stored in a buffer column can be accessed by using one of the data type accessor methods, such as the GetString method, or it can be accessed directly by using array access notation. Accessing a column in the PipelineBuffer by using the Item method is slower than using a data type accessor method because the PipelineBuffer detects the data type stored in the column and then calls the data type accessor method.

Buffer columns containing binary large objects (BLOB) data cannot be retrieved using the array access notation because the amount of data stored in the BLOB column may exceed the available memory. Instead, the GetBlobData and GetBytes methods should be used.

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

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