GetBlobLength 方法

Gets the number of bytes contained in a binary large object (BLOB) PipelineBuffer column.

此 API 不符合 CLS 標準。 

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

語法

'宣告
<CLSCompliantAttribute(False)> _
Public Function GetBlobLength ( _
    columnIndex As Integer _
) As UInteger
'用途
Dim instance As PipelineBuffer
Dim columnIndex As Integer
Dim returnValue As UInteger

returnValue = instance.GetBlobLength(columnIndex)

[CLSCompliantAttribute(false)]
public uint GetBlobLength(
    int columnIndex
)

[CLSCompliantAttribute(false)]
public:
unsigned int GetBlobLength(
    int columnIndex
)

[<CLSCompliantAttribute(false)>]
member GetBlobLength : 
        columnIndex:int -> uint32 

public function GetBlobLength(
    columnIndex : int
) : uint

參數

• columnIndex
  型別：System. . :: . .Int32
  The index of the column containing the BLOB.

傳回值

型別：System. . :: . .UInt32
The number of bytes in the binary large object.

備註

The GetBlobLength method is used to determine the number of bytes contained in a PipelineBuffer column containing a BLOB data type, such as a DT_IMAGE. This method is typically called prior to a call to the GetBlobData method. The third parameter to GetBlobData is the number of bytes to retrieve from the BLOB. You call GetBlobLength prior to GetBlobData when you want to retrieve all the bytes in a BLOB PipelineBuffer column.

請參閱

參考

PipelineBuffer 類別

Microsoft.SqlServer.Dts.Pipeline 命名空間