WorkflowView.GetService(Type) Method

Definition

Namespace:

System.Workflow.ComponentModel.Design

Assembly:

System.Workflow.ComponentModel.dll

Gets the service object of the specified type, if it is available.

protected:
 override System::Object ^ GetService(Type ^ serviceType);

protected override object GetService (Type serviceType);

override this.GetService : Type -> obj

Protected Overrides Function GetService (serviceType As Type) As Object

Parameters

serviceType

Type

The Type of the service to retrieve.

Returns

Object

If the serviceType is typeof(CommandID) then GetService returns a specific CommandID; otherwise, GetService returns a Object implementing the requested service, or a null reference (Nothing in Visual Basic) if the service cannot be resolved.

Examples

The following example uses the GetService method of the WorkflowView object to return an ISelectionService interface. If the service exists, EnsureVisible is called passing the currently selected activity using the PrimarySelection property of the ISelectionService object.

public void FindSelection()
{
    ISelectionService selectionService;
    selectionService = ((IServiceProvider)this.workflowView).GetService(typeof(ISelectionService))
        as ISelectionService;

    if (selectionService != null)
        this.workflowView.EnsureVisible(selectionService.PrimarySelection);
}

Public Sub FindSelection()
    Dim selectionService As ISelectionService
    selectionService = CType(CType(Me.workflowView, IServiceProvider).GetService(GetType(ISelectionService)), ISelectionService)

    If selectionService IsNot Nothing Then
        Me.workflowView.EnsureVisible(selectionService.PrimarySelection)
    End If
End Sub

Remarks

GetService returns a Object implementing the requested service, or a null reference (Nothing) if the service cannot be resolved.