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Интерфейс IDTSBuffer100

  • Статья

Represents an in-memory, two-dimensional storage object that contains rows and columns.

Пространство имен:  Microsoft.SqlServer.Dts.Pipeline.Wrapper
Сборка:  Microsoft.SqlServer.DTSPipelineWrap (в Microsoft.SqlServer.DTSPipelineWrap.dll)

Синтаксис

'Декларация
<GuidAttribute("62F50D4D-3EA5-4859-A606-95CA9FDDC356")> _
<InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)> _
Public Interface IDTSBuffer100
'Применение
Dim instance As IDTSBuffer100

[GuidAttribute("62F50D4D-3EA5-4859-A606-95CA9FDDC356")]
[InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)]
public interface IDTSBuffer100

[GuidAttribute(L"62F50D4D-3EA5-4859-A606-95CA9FDDC356")]
[InterfaceTypeAttribute(ComInterfaceType::InterfaceIsIUnknown)]
public interface class IDTSBuffer100

[<GuidAttribute("62F50D4D-3EA5-4859-A606-95CA9FDDC356")>]
[<InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)>]
type IDTSBuffer100 =  interface end

public interface IDTSBuffer100

Тип IDTSBuffer100 обеспечивает доступ к следующим элементам.

Методы

  Имя Описание
Открытый метод AddBLOBData Appends byte data to a column in an IDTSBuffer100.
Открытый метод AddRow Adds a new row to an IDTSBuffer100 object.
Открытый метод Clone Creates a private copy of an IDTSBuffer100 object.
Открытый метод DirectErrorRow Sends a row in an IDTSBuffer100 object to an IDTSOutput100 whose IsErrorOut property is true.
Открытый метод DirectRow Sends a row in an IDTSBuffer100 to an IDTSOutput100.
Открытый метод GetBLOBData Retrieves an array of bytes from a binary large object (BLOB) stored in a column of a IDTSBuffer100.
Открытый метод GetBLOBLength Gets the number of bytes contained in a column in an IDTSBuffer100.
Открытый метод GetBLOBObject Gets an IDTSBLOBObject100 that is used to read and write the bytes in a column in an IDTSBuffer100.
Открытый метод GetBLOBStream Gets an IStream interface used to access the binary large object (BLOB) stored in a column in an IDTSBuffer100.
Открытый метод GetBoundaryInfo Gets the number of columns and the maximum number of rows that an IDTSBuffer100 can hold.
Открытый метод GetColumnCount Gets the number of columns in an IDTSBuffer100.
Открытый метод GetColumnInfo Gets the DTP_BUFFCOL structure for the specified column in an IDTSBuffer100.
Открытый метод GetData Retrieves the data stored in a specified row and column of a IDTSBuffer100.
Открытый метод GetDataByRef (Feature deprecated, see Remarks.) Gets a pointer to the data stored in a column in an IDTSBuffer100.
Открытый метод GetFlatMemory Gets a pointer to the bytes stored by an IDTSBuffer100.
Открытый метод GetID Retrieves the ID of a buffer.
Открытый метод GetManager Gets a buffer manager.
Открытый метод GetRowCount Gets the number of rows stored in an IDTSBuffer100.
Открытый метод GetRowDataBytes (Feature deprecated, see Remarks.) Gets a pointer to the start of a row in an IDTSBuffer100.
Открытый метод GetRowStarts (Feature deprecated, see Remarks.) Use the GetData or GetBLOBData method instead of the GetRowStarts method.
Открытый метод GetStatus Retrieves the status information of a column in an IDTSBuffer100.
Открытый метод GetType Gets the handle of a buffer type.
Открытый метод IsEndOfRowset Specifies whether an IDTSBuffer100 has reached the end of its collection of rows.
Открытый метод IsNull Checks whether a specified column is null.
Открытый метод LockData Locks the data in an IDTSBuffer100.
Открытый метод MoveRow Moves a row in an IDTSBuffer100 to a new location.
Открытый метод PrepareDataStatusForInsert Sets the status value of the columns in a range of rows.
Открытый метод RemoveRow Deletes a row from an IDTSBuffer100.
Открытый метод ResetBLOBData Deletes the bytes stored in a column in an IDTSBuffer100.
Открытый метод SetBLOBFromObject Assigns the data contained in an IDTSBLOBObject100 to a column in an IDTSBuffer100.
Открытый метод SetBLOBFromStream Assigns data to a binary large object (BLOB) column from a sequential stream.
Открытый метод SetData Assigns data to a column in an IDTSBuffer100.
Открытый метод SetEndOfRowset Notifies an IDTSBufferManager100 that the component has finished adding rows to an output IDTSBuffer100 object.
Открытый метод SetErrorInfo Sets the error information for a row.
Открытый метод SetStatus Sets the status information of a column in an IDTSBuffer100.
Открытый метод SwapRows Swaps the location of two rows in an IDTSBuffer100.
Открытый метод UnlockData Unlocks the data in an IDTSBuffer100 object.

В начало

Замечания

The IDTSBuffer100 is an in-memory, two-dimensional data structure that contains rows and columns. Each column in a buffer has information that describes its data type, its offset location in memory in the row, its maximum size, and the lineage ID of the column in a component.

The data in each column is accessed either by using its offset as defined by the DTP_BUFFCOL structure, or by using the SetData and GetData methods, in which the data location of the column in the buffer is defined by handles to its row and column.

There are two types of buffers, private and public, which are created by the IDTSBufferManager100. Private buffers are created when requested by a data flow component and are used internally by the component. Public buffers are provided to the components in the data flow graph and filled and manipulated before arriving at the destination. Public buffers are created, managed, and destroyed by the IDTSBufferManager100.

Buffers are identified by their handles and are 1-based, which means they cannot have a value of zero or nullпустая ссылка (Nothing в Visual Basic) unless they are invalid.

Managed component developers do not typically use the IDTSBuffer100 object unless they intend to create private buffers and implement the code necessary to interoperate between managed code and native code. Instead, they use the managed PipelineBuffer class.

См. также

Справочник

Пространство имен Microsoft.SqlServer.Dts.Pipeline.Wrapper