Свойство PipelineComponent.BufferManager

Статья
04/26/2013

Gets the IDTSBufferManager100 of the pipeline component.

Этот API-интерфейс несовместим с CLS.

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

Синтаксис

'Декларация
<CLSCompliantAttribute(False)> _
Public ReadOnly Property BufferManager As IDTSBufferManager100 
    Get
'Применение
Dim instance As PipelineComponent 
Dim value As IDTSBufferManager100 

value = instance.BufferManager

[CLSCompliantAttribute(false)]
public IDTSBufferManager100 BufferManager { get; }

[CLSCompliantAttribute(false)]
public:
property IDTSBufferManager100^ BufferManager {
    IDTSBufferManager100^ get ();
}

[<CLSCompliantAttribute(false)>]
member BufferManager : IDTSBufferManager100

function get BufferManager () : IDTSBufferManager100

Значение свойства

Тип: Microsoft.SqlServer.Dts.Pipeline.Wrapper.IDTSBufferManager100
The IDTSBufferManager100 object.

Замечания

The BufferManager is a read only, execution-time property that is first available to components in the PreExecute method.

The FindColumnByLineageID method is used to locate a component's columns in the IDTSInputColumnCollection100 or IDTSOutputColumnCollection100 of the component, in the PipelineBuffer. This is necessary because the number of columns contained in the PipelineBuffer may exceed the number of columns expected by the component.

The BufferManager is also used to create new IDTSBuffer100 objects using the CreateBuffer, CreateFlatBuffer, and CreateVirtualBuffer methods. However, these methods are not supported from managed code, and should only be used when writing native C++ components.

Примеры

The following code example shows how to use the BufferManager property to locate the columns in a PipelineBuffer row.

using System;
using Microsoft.SqlServer.Dts.Pipeline;
using Microsoft.SqlServer.Dts.Pipeline.Wrapper;
using Microsoft.SqlServer.Dts.Runtime.Wrapper;

namespace Microsoft.Samples.SqlServer.Dts
{
    public class SampleComponent : PipelineComponent
    {
        public override void ProcessInput( int InputID, PipelineBuffer buffer )
        {
            IDTSInput100 i = ComponentMetaData.InputCollection.GetObjectByID( InputID );
            foreach( IDTSInputColumn100 col in i.InputColumnCollection)
            {
                int colIndex = BufferManager.FindColumnByLineageID(i.Buffer, col.LineageID);
                BufferColumn bc =buffer.GetColumnInfo(colIndex);
            }
        }
    }
}

Imports System 
Imports Microsoft.SqlServer.Dts.Pipeline 
Imports Microsoft.SqlServer.Dts.Pipeline.Wrapper 
Imports Microsoft.SqlServer.Dts.Runtime.Wrapper 
Namespace Microsoft.Samples.SqlServer.Dts 

 Public Class SampleComponent 
 Inherits PipelineComponent 

   Public Overrides Sub ProcessInput(ByVal InputID As Integer, ByVal buffer As PipelineBuffer) 
     Dim i As IDTSInput100 = ComponentMetaData.InputCollection.GetObjectByID(InputID) 
     For Each col As IDTSInputColumn100 In i.InputColumnCollection 
       Dim colIndex As Integer = BufferManager.FindColumnByLineageID(i.Buffer, col.LineageID) 
       Dim bc As BufferColumn = buffer.GetColumnInfo(colIndex) 
     Next 
   End Sub 
 End Class 
End Namespace

См. также

Справочник

PipelineComponent Класс

Пространство имен Microsoft.SqlServer.Dts.Pipeline

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