TaskHost-Klasse

Provides a container that encapsulates a single task. In the SSIS Designer, the TaskHost is not configured separately; instead, it is configured when you set the properties of the task it encapsulates.

Vererbungshierarchie

System.Object
  Microsoft.SqlServer.Dts.Runtime.DtsObject
    Microsoft.SqlServer.Dts.Runtime.Executable
      Microsoft.SqlServer.Dts.Runtime.DtsContainer
        Microsoft.SqlServer.Dts.Runtime.EventsProvider
          Microsoft.SqlServer.Dts.Runtime.TaskHost

Namespace:  Microsoft.SqlServer.Dts.Runtime
Assembly:  Microsoft.SqlServer.ManagedDTS (in Microsoft.SqlServer.ManagedDTS.dll)

Syntax

'Declaration
Public NotInheritable Class TaskHost _
    Inherits EventsProvider _
    Implements IDTSObjectHost, IDTSPropertiesProvider, IDTSPropertiesProviderEx, IDTSPackagePath,  _
    IDTSExecutionPath
'Usage
Dim instance As TaskHost

public sealed class TaskHost : EventsProvider, 
    IDTSObjectHost, IDTSPropertiesProvider, IDTSPropertiesProviderEx, IDTSPackagePath, IDTSExecutionPath

public ref class TaskHost sealed : public EventsProvider, 
    IDTSObjectHost, IDTSPropertiesProvider, IDTSPropertiesProviderEx, IDTSPackagePath, IDTSExecutionPath

[<SealedAttribute>]
type TaskHost =  
    class 
        inherit EventsProvider 
        interface IDTSObjectHost 
        interface IDTSPropertiesProvider 
        interface IDTSPropertiesProviderEx 
        interface IDTSPackagePath 
        interface IDTSExecutionPath 
    end

public final class TaskHost extends EventsProvider implements IDTSObjectHost, IDTSPropertiesProvider, IDTSPropertiesProviderEx, IDTSPackagePath, IDTSExecutionPath

Der TaskHost-Typ macht folgende Elemente verfügbar.

Eigenschaften

	Name	Beschreibung
	ApartmentThreaded	Infrastruktur Gets a value that indicates whether the task is an apartment-threaded object.
	CreationName	Returns the string that is used to create an instance of the DtsContainer object. This property is read-only. (Geerbt von DtsContainer.)
	DebugMode	Gets or sets a Boolean that indicates whether the DtsContainer object is in debug mode and whether it should fire the OnBreakpointHit event while running. (Geerbt von DtsContainer.)
	DelayValidation	Gets or sets a Boolean that indicates whether validation of the task is delayed until run time. The default value is false. (Geerbt von DtsContainer.)
	Description	Gets or sets the description of the DtsContainer object. (Geerbt von DtsContainer.)
	Disable	A Boolean that indicates if the DtsContainer object is disabled. (Geerbt von DtsContainer.)
	DisableEventHandlers	Gets or sets a Boolean that indicates whether the event handlers on task are disabled. (Geerbt von EventsProvider.)
	EventHandlers	Returns a collection of event handler objects. This field is read-only. (Geerbt von EventsProvider.)
	EventInfos	Returns a collection of EventInfo objects. This field is read-only. (Geerbt von EventsProvider.)
	ExecutionDuration	Returns a value that indicates the amount of time that the container spent in execution, in milliseconds. This property is read-only. (Geerbt von DtsContainer.)
	ExecutionResult	Returns a value that indicates the success or failure of the execution of the DtsContainer object. (Geerbt von DtsContainer.)
	ExecutionStatus	Returns a value that indicates the current status of the execution of the DtsContainer object at the time of the call. (Geerbt von DtsContainer.)
	ExecutionValue	Gets the result of the task execution. This property is read-only.
	ExecValueVariable	Gets or sets the custom Variable that contains the execution results of the task.
	FailPackageOnFailure	Gets or sets a Boolean that indicates whether the package fails when a child container fails. This property is used on containers, not the package itself. (Geerbt von DtsContainer.)
	FailParentOnFailure	Gets or sets a Boolean that defines whether the parent container fails when a child container fails. (Geerbt von DtsContainer.)
	ForcedExecutionValue	If the ForceExecutionValue property is set to True, gets or sets a value that specifies the optional execution value that the package returns. (Geerbt von DtsContainer.)
	ForceExecutionResult	Gets or sets a DTSForcedExecResult enumeration value that specifies the forced execution result of the container. (Geerbt von DtsContainer.)
	ForceExecutionValue	Gets or sets a Boolean that indicates whether the execution value of the container should be forced to contain a particular value. (Geerbt von DtsContainer.)
	HasExpressions	Gets a value that indicates whether the TaskHost object has expressions.
	HostType	Gets a value from the DTSObjectHostType enumeration that describes the host of the container. This property is read-only.
	ID	Returns the ID, which is a GUID, of the DtsContainer. The value is read-only. (Geerbt von DtsContainer.)
	InnerObject	Gets the method used to access the task instance being hosted by the TaskHost.
	IsDefaultLocaleID	A Boolean that indicates whether the container uses the default locale. This property is read-only. (Geerbt von DtsContainer.)
	IsolationLevel	Gets or sets the isolation level of the transaction in the DtsContainer object. (Geerbt von DtsContainer.)
	LocaleID	Gets or sets an Integer that indicates the Microsoft Win32® localeID to use when the DtsContainer object is executed. (Geerbt von DtsContainer.)
	LogEntryInfos	Returns a LogEntryInfos object. This property is read-only. (Geerbt von DtsContainer.)
	LoggingMode	Gets or sets a valid value from the DTSLoggingMode enumeration that indicates the logging mode of the container. (Geerbt von DtsContainer.)
	LoggingOptions	Returns an object that contains properties that indicates the filtering and logging resource for containers. This property is read-only. (Geerbt von DtsContainer.)
	MaximumErrorCount	Gets or sets an Integer value that indicates the maximum number of errors that can occur before the DtsContainer object stops running. (Geerbt von DtsContainer.)
	Name	Gets or sets the name of the DtsContainer. (Geerbt von DtsContainer.)
	Parent	Returns the parent container. The value is read-only. (Geerbt von DtsContainer.)
	Properties	Gets a DtsProperties collection that contains the properties associated with the task.
	Site	Infrastruktur Gets or sets the site for the container. (Geerbt von DtsContainer.)
	StartTime	Returns the time that the container began execution. This property is read-only. (Geerbt von DtsContainer.)
	StopTime	Returns the time that the container ended execution. This property is read-only. (Geerbt von DtsContainer.)
	SuspendRequired	Gets or sets a Boolean that indicates if tasks should suspend when they encounter a breakpoint. This value is set by the runtime engine for tasks and containers when a breakpoint is encountered. (Geerbt von DtsContainer.)
	TransactionOption	Gets or sets a DTSTransactionOption enumeration value that indicates whether the container participates in transactions. (Geerbt von DtsContainer.)
	VariableDispenser	Returns a VariableDispenser object so variables associated with the container can be locked. (Geerbt von DtsContainer.)
	Variables	Returns a collection that contains the variables associated with this container. This property is read-only. (Geerbt von DtsContainer.)

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Methoden

	Name	Beschreibung
	AcceptBreakpointManager	This method is called by the run-time engine when a task or container is created, and passes it a BreakpointManager manager to allow the task to create, remove, and check the status of breakpoints. This method is called by the runtime and is not used in code. (Geerbt von DtsContainer.)
	ComputeExpressions	Computes the expressions of the TaskHost object.
	Dispose	Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources. (Geerbt von DtsContainer.)
	Equals	Determines whether two object instances are equal. (Geerbt von DtsObject.)
	Execute	Runs the application, container, or package as part of a package workflow. (Geerbt von DtsContainer.)
	GetExecutionPath	Returns the execution path of the current TaskHost.
	GetExpression	Returns the expression for the specified property. Null means no expression is assigned.
	GetHashCode	Returns the hash code for this instance. (Geerbt von DtsObject.)
	GetPackagePath	Returns the path to the task location.
	GetType	(Geerbt von Object.)
	LoadFromXML	This method is not callable by your application code. To load a package saved as .xml, use the Application.LoadPackage method. (Geerbt von DtsContainer.)
	ResumeExecution	Resumes execution of the task after pausing. The task or container is resumed by the runtime engine. (Geerbt von DtsContainer.)
	SaveToXML	This method is not callable by your application code. To save a package as .xml, use the Application.SaveToXml method. (Geerbt von DtsContainer.)
	SetExpression	Assigns the specified expression to the property. Specify nullein NULL-Verweis (Nothing in Visual Basic) to remove an existing expression from the property.
	SuspendExecution	Called when the executable needs to suspend. This method is called by the runtime engine. (Geerbt von DtsContainer.)
	ToString	(Geerbt von Object.)
	Validate	Allows the container to determine if it contains invalid settings that will prevent it from executing successfully. (Geerbt von DtsContainer.)

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Ereignisse

	Name	Beschreibung
	Disposed	Adds an event handler to listen to the Disposed event on the component. (Geerbt von DtsContainer.)

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Felder

	Name	Beschreibung
	m_executable	Infrastruktur The executable. (Geerbt von Executable.)

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Hinweise

Integration Services provides several different types of containers for building packages, with the TaskHost being one of those containers. The TaskHost container provides services to a single task. It does not have a matching item in the graphical designer toolbox. The TaskHost object is a wrapper object for the task, and is created transparently during task creation. It is returned from the Add method as an Executable object and is cast as a TaskHost. Finally, the task instance is accessed through the InnerObject property. For more information on all of the SSIS containers, see SQL Server Integration Services-Container.

Beispiele

The following code example shows the creation of an empty package. Two tasks are added to the package and cast into a TaskHost class, so TaskHost methods and properties can be used on either task , such as the InnerObject method, without regard to what kind of task it is.

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.SqlServer.Dts.Runtime;
using Microsoft.SqlServer.Dts.Tasks.BulkInsertTask;
using Microsoft.SqlServer.Dts.Tasks.FileSystemTask;

namespace Microsoft.SqlServer.SSIS.Samples
{
    class Program
    {
        static void Main(string[] args)
        {
            Package p = new Package();
            // Add a File System task to the package.
            Executable exec1 = p.Executables.Add("STOCK:FileSystemTask");
            TaskHost thFileSystemTask = exec1 as TaskHost;
            // Add a Bulk Insert task to the package.
            Executable exec2 = p.Executables.Add("STOCK:BulkInsertTask");
            TaskHost thBulkInsertTask = exec2 as TaskHost;

            // Iterate through the package Executables collection.
            Executables pExecs = p.Executables;
            foreach (Executable pExec in pExecs)
            {
                TaskHost taskHost = (TaskHost)pExec;
                Console.WriteLine("Type {0}", taskHost.InnerObject.ToString());
            }
        }
    }
}

Imports System
Imports System.Collections.Generic
Imports System.Text
Imports Microsoft.SqlServer.Dts.Runtime
Imports Microsoft.SqlServer.Dts.Tasks.BulkInsertTask
Imports Microsoft.SqlServer.Dts.Tasks.FileSystemTask
 
Namespace Microsoft.SqlServer.SSIS.Samples
    Class Program
        Shared  Sub Main(ByVal args() As String)
            Dim p As Package =  New Package() 
            ' Add a File System task to the package.
            Dim exec1 As Executable =  p.Executables.Add("STOCK:FileSystemTask") 
            Dim thFileSystemTask As TaskHost =  exec1 as TaskHost 
            ' Add a Bulk Insert task to the package.
            Dim exec2 As Executable =  p.Executables.Add("STOCK:BulkInsertTask") 
            Dim thBulkInsertTask As TaskHost =  exec2 as TaskHost 
 
            ' Iterate through the package Executables collection.
            Dim pExecs As Executables =  p.Executables 
            Dim pExec As Executable
            For Each pExec In pExecs
                Dim taskHost As TaskHost = CType(pExec, TaskHost)
                Console.WriteLine("Type {0}", taskHost.InnerObject.ToString())
            Next
        End Sub
    End Class
End Namespace

Sample Output:

Type Microsoft.SqlServer.Dts.Tasks.FileSystemTask.FileSystemTask

Type Microsoft.SqlServer.Dts.Tasks.BulkInsertTask.BulkInsertTask

Threadsicherheit

Alle öffentlichen static (Shared in Visual Basic)-Elemente dieses Typs sind Threadsicher. Für Instanzelemente wird die Threadsicherheit nicht gewährleistet.

Siehe auch

Verweis

Microsoft.SqlServer.Dts.Runtime-Namespace