Classe ScriptComponent
Serves as the base class for the read-only UserComponent class generated by the Script component in the ComponentWrapper project item in a Script component project.
Gerarchia di ereditarietà
System.Object
Microsoft.SqlServer.Dts.Pipeline.ScriptComponent
Spazio dei nomi Microsoft.SqlServer.Dts.Pipeline
Assembly: Microsoft.SqlServer.TxScript (in Microsoft.SqlServer.TxScript.dll)
Sintassi
'Dichiarazione
Public Class ScriptComponent
'Utilizzo
Dim instance As ScriptComponent
public class ScriptComponent
public ref class ScriptComponent
type ScriptComponent = class end
public class ScriptComponent
Nel tipo ScriptComponent sono esposti i membri seguenti.
Costruttori
Nome | Descrizione | |
---|---|---|
ScriptComponent | Initializes a new instance of the ScriptComponent class. |
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Proprietà
Nome | Descrizione | |
---|---|---|
ComponentMetaData | Returns a reference to the component definition. | |
EvaluatorContext | Gets the script component evaluator context. | |
InputIDToNameMap | Gets the input identifier to name map. | |
OutputNameMap | Gets the output name map. | |
ReadOnlyVariables | Returns the collection of ReadOnlyVariables available to the component. | |
ReadWriteVariables | Returns the collection of ReadWriteVariables available to the component. | |
VariableDispenser | Returns an object that the data flow uses internally to work with variables. |
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Metodi
Nome | Descrizione | |
---|---|---|
AcquireConnections | Obtains a connection or connection information by using a connection manager. | |
Equals | Ereditato da Object. | |
Finalize | Ereditato da Object. | |
GetColumnIndexes | Infrastruttura. Gets the collection of column index for the script component. | |
GetHashCode | Ereditato da Object. | |
GetOutputID | Returns the output ID that has a specified output name. | |
GetType | Ereditato da Object. | |
Log | Writes a log entry. | |
MemberwiseClone | Ereditato da Object. | |
PostExecute | Executes custom code that must run after the Script component has processed its inputs and outputs. | |
PreExecute | Executes custom code that must run before the Script component has processed its inputs and outputs. | |
PrimeOutput | Prepares the outputs in Script components, such as sources and transformations with asynchronous outputs, that add new rows to the output buffers. | |
ProcessInput(Int32, PipelineBuffer) | Processes the inputs in Script components, such as transformations and destinations, that receive inputs from upstream components. | |
ProcessInput(Int32, String, PipelineBuffer, OutputNameMap) | Processes inputs in the script components. | |
ReleaseConnections | Releases a connection to a connection manager. | |
SetBufferColumnIndexes | Infrastruttura. Sets the index of the buffer columns. | |
ToString | Ereditato da Object. |
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Osservazioni
The ScriptComponent class serves as the base class for the read-only UserComponent class, which is generated by the Script component in the ComponentWrapper project item in a Script component project. The UserComponent class serves as the base class for the ScriptMain class, in which the developer writes custom code, and provides the developer with a set of methods for working with the component's inputs and outputs. It also provides strongly-typed accessor properties for variables and connection managers available to the component.
The Script component developer does not use the ScriptComponent class directly, but indirectly, by coding the methods and properties of the ScriptMain class, which inherits from ScriptComponent through the UserComponent class.
For more information, see Codifica e debug del componente script and Informazioni sul modello a oggetti del componente script.
Esempi
The following code sample demonstrates all the code that a developer has to write to create a transformation with synchronous outputs by using the Script component. For more information on this sample, see Creazione di una trasformazione sincrona con il componente script.
Public Class ScriptMain
Inherits UserComponent
Public Overrides Sub MyAddressInput_ProcessInputRow(ByVal Row As MyAddressInputBuffer)
Row.City = UCase(Row.City)
End Sub
End Class
Protezione dei thread
I membri static (Shared in Visual Basic) pubblici di questo tipo sono affidabili. Non è invece garantita la sicurezza dei membri dell'istanza.