Use and customize of host of forms of Visual Studio 2005 in your applications .net [30 mn of reading - published 6/6/2006 8:37:04 PM - Target : Confirmé]

Author

William GUIOUBLY Student-Engineer Supinfo Paris SUPINFO graduate year  2007    Write to the person    All projects of the same author    Mini-CV of the author

8 The IComponentChangeService service

The IComponentChangeService service is an interface of the namespace System.ComponentModel.Design. It provides methods for management of the menus and the verbs (To consult the MSDN to know all its methods, properties and events). One recovers this service via the GetService method of the DesignSurface class, while passing the System.ComponentModel.Design.IComponentChangeService type in parameter. 

Let us examine somebody of these methods, properties and events:

- The ComponentAdded event which is raised when a component is added to the host.

- The ComponentChanged event which is raised when a component is modified on the host.

- The ComponentRemoved event which is raised when a component is withdrawn from the host. 

- The ComponentRename event which is raised when the name of a component changed host.

IComponentChangeService is a service by default of the class DesignSurface, it is not necessary to add it except if you wish to customize it.

We go associated the events ComponentAdded, ComponentRemoved and ComponentRename with the IComponentChangeService service. We will modify the Form1_Load event as follows:

private void Form1_Load(object sender, EventArgs e) {     …      //Select the service IComponentChangeService and assocation of evenements ComponentAdded, ComponentRemoved, ComponentRename    System.ComponentModel.Design.IComponentChangeService componentChangeService = (System.ComponentModel.Design.IComponentChangeService)designer.GetService( typeof(System.ComponentModel.Design.IComponentChangeService));     componentChangeService.ComponentAdded += new System.ComponentModel.Design.ComponentEventHandler( componentChangeService_ComponentAdded);     componentChangeService.ComponentRemoved += new System.ComponentModel.Design.ComponentEventHandler( componentChangeService_ComponentRemoved);     componentChangeService.ComponentRename += new System.ComponentModel.Design.ComponentRenameEventHandler( componentChangeService_ComponentRename);      }   // Release the ressources private void Form1_FormClosing(object sender, FormClosingEventArgs e) {     // Release the evenements on the service of IComponentChangeService    System.ComponentModel.Design.IComponentChangeService componentChangeService = (System.ComponentModel.Design.IComponentChangeService)designer.GetService( typeof(System.ComponentModel.Design.IComponentChangeService));     componentChangeService.ComponentAdded -= new System.ComponentModel.Design.ComponentEventHandler( componentChangeService_ComponentAdded);     componentChangeService.ComponentRemoved -= new System.ComponentModel.Design.ComponentEventHandler( componentChangeService_ComponentRemoved);     componentChangeService.ComponentRename -= new System.ComponentModel.Design.ComponentRenameEventHandler( componentChangeService_ComponentRename);       // Release the evenements on the service of selection    System.ComponentModel.Design.ISelectionService selectionService =          (System.ComponentModel.Design.ISelectionService)         designer.GetService(typeof(System.ComponentModel.Design.ISelectionService));       selectionService.SelectionChanged -= new EventHandler(selectionService_SelectionChanged);       // Release the evenements on the view of host      ((Control)designer.View).DragDrop -= new DragEventHandler(Form1_DragDrop);       // Delete the view of designer of panel    panel1.Controls.Remove((Control)designer.View);       // Release the designer to the form      designer.Dispose(); }   // Component renamed void componentChangeService_ComponentRename(object sender, System.ComponentModel.Design.ComponentRenameEventArgs e) {     MessageBox.Show("Le composant " + e.OldName + " a été renommé en "+ e.NewName); }   // Component deleted void componentChangeService_ComponentRemoved(object sender, System.ComponentModel.Design.ComponentEventArgs e) {     MessageBox.Show("Le composant " + ((Control)e.Component).Name + " a été supprimé"); }   // Component added void componentChangeService_ComponentAdded(object sender, System.ComponentModel.Design.ComponentEventArgs e) {     MessageBox.Show("Le composant " + ((Control)e.Component).Name + " a été ajouté"); }

To compile and launch the project and here what you obtain: