AspNetEdit.Editor.ComponentModel.DesignerHost.SetRootComponent C# (CSharp) Метод

        internal void SetRootComponent(IComponent rootComponent)
        {
            this.rootComponent = rootComponent;
            if (rootComponent == null) {
                rootDocument = null;
                return;
            }

            if (!(rootComponent is Control))
                throw new InvalidOperationException ("The root component must be a Control");
        }

        public void Add(IComponent component, string name)
        {
            IDesigner designer = null;

            //input checks
            if (component == null)
            {
                throw new ArgumentException("Cannot add null component to container", "component");
            }
            if (!(component is Control))
            {
                throw new ArgumentException("This Container only accepts System.Web.UI.Control-derived components", "component");
            }
            if (component.Site != null && component.Site.Container != this)
            {
                component.Site.Container.Remove(component);
            }

            //Check the name and create one if necessary
            INameCreationService nameService = host.GetService(typeof(INameCreationService)) as INameCreationService;

            if (nameService == null)
            {
                throw new Exception("The container must have access to a INameCreationService implementation");
            }

            if (name == null || !nameService.IsValidName(name))
            {
                name = nameService.CreateName(this, component.GetType());
                System.Diagnostics.Trace.WriteLine("Generated name for component: " + name);
            }

            //check we don't already have component with same name
            if (GetComponent(name) != null)
            {
                throw new ArgumentException("There is already a component with this name in the container", "name");
            }

            //we're definately adding it now, so broadcast
            OnComponentAdding(component);

            //get a site and set ID property
            //this way (not PropertyDescriptor.SetValue) won't fire change events
            ((Control)component).ID = name;
            component.Site          = new DesignSite(component, this);

            //Get designer. If first component, designer must be an IRootDesigner
            if (components.Count == 0)
            {
                host.SetRootComponent(component);
                designer = new RootDesigner(component);
            }

            //FIXME: Give Mono some base designers to find! We should never encounter this!
            //else
            //	designer = TypeDescriptor.CreateDesigner (component, typeof(System.ComponentModel.Design.IDesigner));


            if (designer == null)
            {
                //component.Site = null;
                //throw new Exception ("Designer could not be obtained for this component.");
            }
            else
            {
                //track and initialise it
                designers.Add(component, designer);
                designer.Initialize(component);
            }

            //add references to referenceManager, unless root component
            if (components.Count != 1)
            {
                host.WebFormReferenceManager.AddReference(component.GetType());
            }

            //Finally put in container
            components.Add(component);

            //and broadcast completion
            OnComponentAdded(component);
        }