Metodo Task.InitializeTask

Initializes the properties associated with the task. This method is called by the runtime and is not used in code.

Spazio dei nomi  Microsoft.SqlServer.Dts.Runtime
Assembly:  Microsoft.SqlServer.ManagedDTS (in Microsoft.SqlServer.ManagedDTS.dll)

Sintassi

'Dichiarazione
Public Overridable Sub InitializeTask ( _
    connections As Connections, _
    variableDispenser As VariableDispenser, _
    events As IDTSInfoEvents, _
    log As IDTSLogging, _
    eventInfos As EventInfos, _
    logEntryInfos As LogEntryInfos, _
    refTracker As ObjectReferenceTracker _
)
'Utilizzo
Dim instance As Task 
Dim connections As Connections 
Dim variableDispenser As VariableDispenser 
Dim events As IDTSInfoEvents 
Dim log As IDTSLogging 
Dim eventInfos As EventInfos 
Dim logEntryInfos As LogEntryInfos 
Dim refTracker As ObjectReferenceTracker

instance.InitializeTask(connections, _
    variableDispenser, events, log, eventInfos, _
    logEntryInfos, refTracker)

public virtual void InitializeTask(
    Connections connections,
    VariableDispenser variableDispenser,
    IDTSInfoEvents events,
    IDTSLogging log,
    EventInfos eventInfos,
    LogEntryInfos logEntryInfos,
    ObjectReferenceTracker refTracker
)

public:
virtual void InitializeTask(
    Connections^ connections, 
    VariableDispenser^ variableDispenser, 
    IDTSInfoEvents^ events, 
    IDTSLogging^ log, 
    EventInfos^ eventInfos, 
    LogEntryInfos^ logEntryInfos, 
    ObjectReferenceTracker^ refTracker
)

abstract InitializeTask : 
        connections:Connections * 
        variableDispenser:VariableDispenser * 
        events:IDTSInfoEvents * 
        log:IDTSLogging * 
        eventInfos:EventInfos * 
        logEntryInfos:LogEntryInfos * 
        refTracker:ObjectReferenceTracker -> unit  
override InitializeTask : 
        connections:Connections * 
        variableDispenser:VariableDispenser * 
        events:IDTSInfoEvents * 
        log:IDTSLogging * 
        eventInfos:EventInfos * 
        logEntryInfos:LogEntryInfos * 
        refTracker:ObjectReferenceTracker -> unit

public function InitializeTask(
    connections : Connections, 
    variableDispenser : VariableDispenser, 
    events : IDTSInfoEvents, 
    log : IDTSLogging, 
    eventInfos : EventInfos, 
    logEntryInfos : LogEntryInfos, 
    refTracker : ObjectReferenceTracker
)

Parametri

• connections
  Tipo: Microsoft.SqlServer.Dts.Runtime.Connections
  A collection of connections used by the task.

• variableDispenser
  Tipo: Microsoft.SqlServer.Dts.Runtime.VariableDispenser
  A VariableDispenser object for locking variables.

• events
  Tipo: Microsoft.SqlServer.Dts.Runtime.IDTSInfoEvents
  An object that implements the IDTSInfoEvents interface.

• log
  Tipo: Microsoft.SqlServer.Dts.Runtime.IDTSLogging
  An object that implements the IDTSLogging interface.

• eventInfos
  Tipo: Microsoft.SqlServer.Dts.Runtime.EventInfos
  A collection that contains events to be raised during execution of the task.

• logEntryInfos
  Tipo: Microsoft.SqlServer.Dts.Runtime.LogEntryInfos
  A collection of log entries.

• refTracker
  Tipo: Microsoft.SqlServer.Dts.Runtime.ObjectReferenceTracker
  An object reference tracker.

Osservazioni

For stock tasks, this method is used to set the log events of each task.

The run-time engine calls InitializeTask immediately after the task is created—before validation, execution, or persistence operations.

Esempi

Task developers define custom events by overriding the InitializeTask method of the Task base class, and creating a new EventInfo. The following code sample shows the InitializeTask method of a custom task, where two custom events are created, and added to the eventInfos collection.

public override void InitializeTask(Connections connections, VariableDispenser variables, IDTSInfoEvents events, IDTSLogging log, EventInfos eventInfos, LogEntryInfos logEntryInfos, ObjectReferenceTracker refTracker)
{
    this.eventInfos = eventInfos;
    string[] paramNames = new string[1];
    TypeCode[] paramTypes = new TypeCode[1]{TypeCode.Int32};
    string[] paramDescriptions = new string[1];

    paramNames[0] = "InitialValue";
    paramDescriptions[0] = "The value before increment.";

    this.eventInfos.Add("OnBeforeIncrement","Fires before the task increments the value.",true,paramNames,paramTypes,paramDescriptions);
    this.onBeforeIncrement = this.eventInfos["OnBeforeIncrement"];

    paramDescriptions[0] = "The value after increment.";
    this.eventInfos.Add("OnAfterIncrement","Fires after the initial value is updated.",true,paramNames, paramTypes,paramDescriptions);
    this.onAfterIncrement = this.eventInfos["OnAfterIncrement"];
}

Public Overrides Sub InitializeTask(ByVal connections As Connections,  ByVal variables As VariableDispenser, ByVal events As IDTSInfoEvents, ByVal log As IDTSLogging, ByVal eventInfos As EventInfos, ByVal logEntryInfos As LogEntryInfos, ByVal refTracker As ObjectReferenceTracker) 
    Me.eventInfos = eventInfos
    Dim paramNames(0) As String
    Dim paramTypes(0) As TypeCode = {TypeCode.Int32}
    Dim paramDescriptions(0) As String
    
    paramNames(0) = "InitialValue"
    paramDescriptions(0) = "The value before increment."
    
    Me.eventInfos.Add("OnBeforeIncrement", "Fires before the task increments the value.", True, paramNames, paramTypes, paramDescriptions)
    Me.onBeforeIncrement = Me.eventInfos("OnBeforeIncrement")
    
    paramDescriptions(0) = "The value after increment."
    Me.eventInfos.Add("OnAfterIncrement", "Fires after the initial value is updated.", True, paramNames, paramTypes, paramDescriptions)
    Me.onAfterIncrement = Me.eventInfos("OnAfterIncrement")
End Sub

Vedere anche

Riferimento

Task Classe

Spazio dei nomi Microsoft.SqlServer.Dts.Runtime