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WorkflowDesignerLoader Constructor

When implemented in a derived class, initializes a new instance of the WorkflowDesignerLoader class.

Namespace:  System.Workflow.ComponentModel.Design
Assembly:  System.Workflow.ComponentModel (in System.Workflow.ComponentModel.dll)

protected WorkflowDesignerLoader()

The following example demonstrates how to create a new instance of a WorkflowDesignerLoader object. In this case, the WorkflowLoader class is derived from WorkflowDesignerLoader. When the WorkflowDesignerLoader is created, a DesignSurface is also created and associated with the WorkflowDesignerLoader using the BeginLoad method.

private ICollection LoadWorkflow(Type workflowType)
    WorkflowLoader loader = new WorkflowLoader();
    loader.WorkflowType = workflowType;

    return LoadWorkflow(loader);

private ICollection LoadWorkflow(WorkflowLoader loader)

    DesignSurface designSurface = new DesignSurface();
    if (designSurface.LoadErrors.Count > 0)
        return designSurface.LoadErrors;

    IDesignerHost designerHost = designSurface.GetService(typeof(IDesignerHost)) as IDesignerHost;
    if (designerHost != null && designerHost.RootComponent != null)
        IRootDesigner rootDesigner = designerHost.GetDesigner(designerHost.RootComponent) as IRootDesigner;
        if (rootDesigner != null)

            this.designSurface = designSurface;
            this.loader = loader;
            this.workflowView = rootDesigner.GetView(ViewTechnology.Default) as WorkflowView;
            this.workflowView.Dock = DockStyle.Fill;
            this.workflowView.TabIndex = 1;
            this.workflowView.TabStop = true;
            this.workflowView.HScrollBar.TabStop = false;
            this.workflowView.VScrollBar.TabStop = false;
            this.workflowView.ShadowDepth = 0;
            this.workflowView.EnableFitToScreen = true;

            ISelectionService selectionService = GetService(typeof(ISelectionService)) as ISelectionService;
            IComponentChangeService changeService = GetService(typeof(IComponentChangeService)) as IComponentChangeService;

            if (selectionService != null)
                selectionService.SelectionChanged += new EventHandler(OnSelectionChanged);

            if (changeService != null)
                changeService.ComponentAdded += new ComponentEventHandler(changeService_ComponentAdded);
                changeService.ComponentChanged += new ComponentChangedEventHandler(changeService_ComponentChanged);
                changeService.ComponentRemoved += new ComponentEventHandler(changeService_ComponentRemoved);
                changeService.ComponentRename += new ComponentRenameEventHandler(changeService_ComponentRename);


    if (btnAutoSynch.Checked == true)
        this.xomlView.Text = GetCurrentXoml();

    return null;

.NET Framework

Supported in: 4, 3.5, 3.0

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.