Task.InitializeTask Method

Articolo
12/15/2008

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 _
)

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
)

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

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

Parametri

connections
A collection of connections used by the task.

variableDispenser
A VariableDispenser object for locking variables.

events
An object that implements the IDTSInfoEvents interface.

log
An object that implements the IDTSLogging interface.

eventInfos
A collection that contains events to be raised during execution of the task.

logEntryInfos
A collection of log entries.

refTracker
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.

Esempio

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

Thread Safety

Any public static (Shared in Microsoft Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Piattaforme

Piattaforme di sviluppo

Per un elenco delle piattaforme supportate, vedere Requisiti hardware e software per l'Installazione di SQL Server 2005.

Piattaforme di destinazione