Clase ScriptBuffer

Serves as the base class for the read-only classes representing the input and the outputs that are generated by the Script component in the BufferWrapper project item in a Script component project.

Jerarquía de herencia

System. . :: . .Object
  Microsoft.SqlServer.Dts.Pipeline..::..ScriptBuffer

Espacio de nombres:  Microsoft.SqlServer.Dts.Pipeline
Ensamblado:  Microsoft.SqlServer.TxScript (en Microsoft.SqlServer.TxScript.dll)

Sintaxis

'Declaración
Public Class ScriptBuffer
'Uso
Dim instance As ScriptBuffer

public class ScriptBuffer

public ref class ScriptBuffer

type ScriptBuffer =  class end

public class ScriptBuffer

El tipo ScriptBuffer expone los siguientes miembros.

Constructores

	Nombre	Descripción
	ScriptBuffer	Initializes a new instance of the ScriptBuffer class.

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Propiedades

	Nombre	Descripción
	Item	Gets or sets the value of a column in the buffer by using its index in the array of buffer column indexes.

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Métodos

	Nombre	Descripción
	AddRow	Adds an empty new row to the data flow buffer.
	DirectRow	Directs a row to the specified output when a component has more than one available output.
	EndOfRowset	Returns a value that indicates whether the end of the rows in a buffer has been reached.
	Equals	(Se hereda de Object.)
	Finalize	(Se hereda de Object.)
	GetHashCode	(Se hereda de Object.)
	GetType	(Se hereda de Object.)
	IsNull	Returns a value that indicates whether the value of the specified column is nullNothingnullptrunites una referencia NULL (Nothing en Visual Basic)..
	MemberwiseClone	(Se hereda de Object.)
	NextRow	Tries to move to the next available row in the buffer and returns a value that indicates whether another row was available.
	SetEndOfRowset	Indicates to the data flow that no more rows will be added to the output buffer.
	SetNull	Makes the value of the specified column nullNothingnullptrunites una referencia NULL (Nothing en Visual Basic)..
	ToString	(Se hereda de Object.)

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Campos

	Nombre	Descripción
	Buffer
	BufferColumnIndexes	An array of column indexes.

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Comentarios

The ScriptBuffer class serves as the base class for the read-only classes representing the input and the outputs that are generated by the Script component in the BufferWrapper project item in a Script component project. The classes in the BufferWrapper project item provide the developer with a set of methods for working with the data flow buffers, as well as typed accessor properties for each column in the buffers.

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.

For more information, see Codificar y depurar el componente de script and Descripción del modelo de objetos del componente de script.

Ejemplos

The following code sample from Crear una transformación asincrónica con el componente de script demonstrates several methods and properties of the ScriptBuffer class, including AddRow, NextRow, EndOfRowset, and SetEndOfRowset.

Public Class ScriptMain
    Inherits UserComponent

    Private myRedmondAddressCount As Integer

    Public Overrides Sub CreateNewOutputRows()

        MySummaryOutputBuffer.AddRow()

    End Sub

    Public Overrides Sub MyAddressInput_ProcessInput(ByVal Buffer As MyAddressInputBuffer)

        While Buffer.NextRow()
            MyAddressInput_ProcessInputRow(Buffer)
        End While

        If Buffer.EndOfRowset Then
            MyAddressOutputBuffer.SetEndOfRowset()
            MySummaryOutputBuffer.MyRedmondCount = myRedmondAddressCount
            MySummaryOutputBuffer.SetEndOfRowset()
        End If

    End Sub

    Public Overrides Sub MyAddressInput_ProcessInputRow(ByVal Row As MyAddressInputBuffer)

        With MyAddressOutputBuffer
            .AddRow()
            .AddressID = Row.AddressID
            .City = Row.City
        End With

        If Row.City.ToUpper = "REDMOND" Then
            myRedmondAddressCount += 1
        End If

    End Sub

End Class

Seguridad para subprocesos

Cualquier miembro público static (Shared en Visual Basic) de este tipo es seguro para subprocesos. No se garantiza que los miembros de instancia sean seguros para subprocesos.

Vea también

Referencia

Espacio de nombres Microsoft.SqlServer.Dts.Pipeline