ComponentModel .Design. IMenuCommandService

Bonjour,
J'utilise entre autre System.ComponentModel.Design.StandardCommands de ComponentModel.Design.IMenuCommandService
Uniquement System.ComponentModel.Design.StandardCommands.delete fonctionne mais pas les autres commandes.
Il s'agit d'un concepteur de fenêtre avec un loader de type BasicHostLoader (qui sérialize du Xml) tiré tout droit d'ici https://docs.microsoft.com/en-us/arc...-framework-2-0
Code VB de la classe BasicHostLoader.vb

Code:

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Imports System Imports System.ComponentModel Imports System.ComponentModel.Design Imports System.ComponentModel.Design.Serialization Imports System.Collections Imports System.Diagnostics Imports System.Globalization Imports System.IO Imports System.Reflection Imports System.Runtime.Serialization.Formatters.Binary Imports System.Windows.Forms Imports System.Xml Imports System.Runtime.InteropServices   Namespace Loader   ''' <summary> ''' Inherits from BasicDesignerLoader. It can persist the HostSurface ''' to an Xml file and can also parse the Xml file to re-create the ''' RootComponent and all the components that it hosts. ''' </summary> Friend Class BasicHostLoader Inherits BasicDesignerLoader   Private root As IComponent   Private dirty As Boolean = True Private unsaved As Boolean Private fileName As String Private host As IDesignerLoaderHost Private xmlDocument As XmlDocument Private Shared ReadOnly propertyAttributes As Object = New Attribute() {DesignOnlyAttribute.No} Private rootComponentType As Type     #Region "Constructors"   ''' Empty constructor simply creates a new form. Public Sub New(ByVal rootComponentType As Type) Me.rootComponentType = rootComponentType   Modified = True End Sub     ''' <summary> ''' This constructor takes a file name. This file ''' should exist on disk and consist of XML that ''' can be read by a data set. ''' </summary> Public Sub New(ByVal fileName As String) If Equals(fileName, Nothing) Then Throw New ArgumentNullException("fileName") End If   Me.fileName = fileName End Sub   #End Region   #Region "Overriden methods of BasicDesignerLoader"   ' Called by the host when we load a document. Protected Overrides Sub PerformLoad(ByVal designerSerializationManager As IDesignerSerializationManager) host = LoaderHost   If host Is Nothing Then Throw New ArgumentNullException("BasicHostLoader.BeginLoad: Invalid designerLoaderHost.") End If     ' The loader will put error messages in here. Dim errors As ArrayList = New ArrayList() Dim successful = True Dim baseClassName As String     ' If no filename was passed in, just create a form and be done with it. If a file name ' was passed, read it. If Equals(fileName, Nothing) Then   If rootComponentType Is GetType(Form) Then host.CreateComponent(GetType(Form)) baseClassName = "Form1"   ElseIf rootComponentType Is GetType(UserControl) Then host.CreateComponent(GetType(UserControl)) baseClassName = "UserControl1" ElseIf rootComponentType Is GetType(Component) Then host.CreateComponent(GetType(Component)) baseClassName = "Component1" Else Throw New Exception("Undefined Host Type: " & rootComponentType.ToString()) End If Else baseClassName = ReadFile(fileName, errors, xmlDocument) End If     ' Now that we are done with the load work, we need to begin to listen to events. ' Listening to event notifications is how a designer "Loader" can also be used ' to save data. If we wanted to integrate this loader with source code control, ' we would listen to the "ing" events as well as the "ed" events. Dim cs As IComponentChangeService = TryCast(host.GetService(GetType(IComponentChangeService)), IComponentChangeService)   If cs IsNot Nothing Then AddHandler cs.ComponentChanged, New ComponentChangedEventHandler(AddressOf OnComponentChanged) AddHandler cs.ComponentAdded, New ComponentEventHandler(AddressOf OnComponentAddedRemoved) AddHandler cs.ComponentRemoved, New ComponentEventHandler(AddressOf OnComponentAddedRemoved) End If     ' Let the host know we are done loading. host.EndLoad(baseClassName, successful, errors)   ' We've just loaded a document, so you can bet we need to flush changes. dirty = True unsaved = False End Sub     ''' <summary> ''' This method is called by the designer host whenever it wants the ''' designer loader to flush any pending changes. Flushing changes ''' does not mean the same thing as saving to disk. For example, ''' In Visual Studio, flushing changes causes new code to be generated ''' and inserted into the text editing window. The user can edit ''' the new code in the editing window, but nothing has been saved ''' to disk. This sample adheres to this separation between flushing ''' and saving, since a flush occurs whenever the code windows are ''' displayed or there is a build. Neither of those items demands a save. ''' </summary> Protected Overrides Sub PerformFlush(ByVal designerSerializationManager As IDesignerSerializationManager) ' Nothing to flush if nothing has changed. If Not dirty Then Return End If   PerformFlushWorker() End Sub   Public Overrides Sub Dispose() ' Always remove attached event handlers in Dispose. Dim cs As IComponentChangeService = TryCast(host.GetService(GetType(IComponentChangeService)), IComponentChangeService)   If cs IsNot Nothing Then RemoveHandler cs.ComponentChanged, New ComponentChangedEventHandler(AddressOf OnComponentChanged) RemoveHandler cs.ComponentAdded, New ComponentEventHandler(AddressOf OnComponentAddedRemoved) RemoveHandler cs.ComponentRemoved, New ComponentEventHandler(AddressOf OnComponentAddedRemoved) End If End Sub     #End Region   #Region "Helper methods"   ''' <summary> ''' Simple helper method that returns true if the given type converter supports ''' two-way conversion of the given type. ''' </summary> Private Function GetConversionSupported(ByVal converter As TypeConverter, ByVal conversionType As Type) As Boolean Return converter.CanConvertFrom(conversionType) AndAlso converter.CanConvertTo(conversionType) End Function     ''' <summary> ''' As soon as things change, we're dirty, so Flush()ing will give us a new ''' xmlDocument and codeCompileUnit. ''' </summary> Private Sub OnComponentChanged(ByVal sender As Object, ByVal ce As ComponentChangedEventArgs) dirty = True unsaved = True   End Sub   Private Sub OnComponentAddedRemoved(ByVal sender As Object, ByVal ce As ComponentEventArgs) dirty = True unsaved = True   End Sub     ''' <summary> ''' This method prompts the user to see if it is OK to dispose this document. ''' The prompt only happens if the user has made changes. ''' </summary> Friend Function PromptDispose() As Boolean If dirty OrElse unsaved Then   Select Case MessageBox.Show("Save changes to existing designer?", "Unsaved Changes", MessageBoxButtons.YesNoCancel) Case DialogResult.Yes Save(False) Case DialogResult.Cancel Return False End Select End If   Return True End Function     #End Region   #Region "Serialize - Flush" ''' <summary> ''' This will recussively go through all the objects in the tree and ''' serialize them to Xml ''' </summary> Public Sub PerformFlushWorker() Dim document As XmlDocument = New XmlDocument() document.AppendChild(document.CreateElement("DOCUMENT_ELEMENT")) Dim idh = CType(host.GetService(GetType(IDesignerHost)), IDesignerHost) root = idh.RootComponent Dim nametable As Hashtable = New Hashtable(idh.Container.Components.Count) Dim manager As IDesignerSerializationManager = TryCast(host.GetService(GetType(IDesignerSerializationManager)), IDesignerSerializationManager) document.DocumentElement.AppendChild(WriteObject(document, nametable, root))   For Each comp As IComponent In idh.Container.Components   If comp IsNot root AndAlso Not nametable.ContainsKey(comp) Then document.DocumentElement.AppendChild(WriteObject(document, nametable, comp)) End If Next   xmlDocument = document End Sub   Private Function WriteObject(ByVal document As XmlDocument, ByVal nametable As IDictionary, ByVal value As Object) As XmlNode Dim idh = CType(host.GetService(GetType(IDesignerHost)), IDesignerHost) Debug.Assert(value IsNot Nothing, "Should not invoke WriteObject with a null value") Dim node As XmlNode = document.CreateElement("Object") Dim typeAttr = document.CreateAttribute("type") typeAttr.Value = value.GetType().AssemblyQualifiedName node.Attributes.Append(typeAttr) Dim component As IComponent = TryCast(value, IComponent)   If component IsNot Nothing AndAlso component.Site IsNot Nothing AndAlso Not Equals(component.Site.Name, Nothing) Then Dim nameAttr = document.CreateAttribute("name") nameAttr.Value = component.Site.Name node.Attributes.Append(nameAttr) Debug.Assert(nametable(component) Is Nothing, "WriteObject should not be called more than once for the same object. Use WriteReference instead") nametable(value) = component.Site.Name End If   Dim isControl = TypeOf value Is Control   If isControl Then Dim childAttr = document.CreateAttribute("children") childAttr.Value = "Controls" node.Attributes.Append(childAttr) End If   If component IsNot Nothing Then   If isControl Then   For Each child As Control In CType(value, Control).Controls   If child.Site IsNot Nothing AndAlso child.Site.Container Is idh.Container Then node.AppendChild(WriteObject(document, nametable, child)) End If Next End If ' if isControl Dim properties As PropertyDescriptorCollection = TypeDescriptor.GetProperties(value, propertyAttributes)   If isControl Then Dim controlProp = properties("Controls")   If controlProp IsNot Nothing Then Dim propArray = New PropertyDescriptor(properties.Count - 1 - 1) {} Dim idx = 0   For Each p As PropertyDescriptor In properties   If p IsNot controlProp Then propArray(Math.Min(Threading.Interlocked.Increment(idx), idx - 1)) = p End If Next   properties = New PropertyDescriptorCollection(propArray) End If End If   WriteProperties(document, properties, value, node, "Property") Dim events As EventDescriptorCollection = TypeDescriptor.GetEvents(value, propertyAttributes) Dim bindings As IEventBindingService = TryCast(host.GetService(GetType(IEventBindingService)), IEventBindingService)   If bindings IsNot Nothing Then properties = bindings.GetEventProperties(events) WriteProperties(document, properties, value, node, "Event") End If Else WriteValue(document, value, node) End If   Return node End Function   Private Sub WriteProperties(ByVal document As XmlDocument, ByVal properties As PropertyDescriptorCollection, ByVal value As Object, ByVal parent As XmlNode, ByVal elementName As String) For Each prop As PropertyDescriptor In properties   If Equals(prop.Name, "AutoScaleBaseSize") Then Dim _DEBUG_ = prop.Name End If   If prop.ShouldSerializeValue(value) Then Dim compName = parent.Name Dim node As XmlNode = document.CreateElement(elementName) Dim attr = document.CreateAttribute("name") attr.Value = prop.Name node.Attributes.Append(attr) Dim visibility = CType(prop.Attributes(GetType(DesignerSerializationVisibilityAttribute)), DesignerSerializationVisibilityAttribute)   Select Case visibility.Visibility Case DesignerSerializationVisibility.Visible   If Not prop.IsReadOnly AndAlso WriteValue(document, prop.GetValue(value), node) Then parent.AppendChild(node) End If   Case DesignerSerializationVisibility.Content Dim propValue = prop.GetValue(value)   If GetType(IList).IsAssignableFrom(prop.PropertyType) Then WriteCollection(document, CType(propValue, IList), node) Else Dim props = TypeDescriptor.GetProperties(propValue, propertyAttributes) WriteProperties(document, props, propValue, node, elementName) End If   If node.ChildNodes.Count > 0 Then parent.AppendChild(node) End If   Case Else End Select End If Next End Sub   Private Function WriteReference(ByVal document As XmlDocument, ByVal value As IComponent) As XmlNode Dim idh = CType(host.GetService(GetType(IDesignerHost)), IDesignerHost) Debug.Assert(value IsNot Nothing AndAlso value.Site IsNot Nothing AndAlso value.Site.Container Is idh.Container, "Invalid component passed to WriteReference") Dim node As XmlNode = document.CreateElement("Reference") Dim attr = document.CreateAttribute("name") attr.Value = value.Site.Name node.Attributes.Append(attr) Return node End Function Public LeCode As String Private Function WriteValue(ByVal document As XmlDocument, ByVal value As Object, ByVal parent As XmlNode) As Boolean   Dim idh = CType(host.GetService(GetType(IDesignerHost)), IDesignerHost)     ' For empty values, we just return. This creates an empty node. If value Is Nothing Then Return True End If   Dim converter = TypeDescriptor.GetConverter(value)   If GetConversionSupported(converter, GetType(String)) Then parent.InnerText = CStr(converter.ConvertTo(Nothing, CultureInfo.InvariantCulture, value, GetType(String))) ElseIf GetConversionSupported(converter, GetType(Byte())) Then Dim data = CType(converter.ConvertTo(Nothing, CultureInfo.InvariantCulture, value, GetType(Byte())), Byte()) parent.AppendChild(WriteBinary(document, data)) ElseIf GetConversionSupported(converter, GetType(InstanceDescriptor)) Then Dim id = CType(converter.ConvertTo(Nothing, CultureInfo.InvariantCulture, value, GetType(InstanceDescriptor)), InstanceDescriptor) parent.AppendChild(WriteInstanceDescriptor(document, id, value)) ElseIf TypeOf value Is IComponent AndAlso CType(value, IComponent).Site IsNot Nothing AndAlso CType(value, IComponent).Site.Container Is idh.Container Then parent.AppendChild(WriteReference(document, CType(value, IComponent))) ElseIf value.GetType().IsSerializable Then Dim formatter As BinaryFormatter = New BinaryFormatter() Dim stream As MemoryStream = New MemoryStream() formatter.Serialize(stream, value) Dim binaryNode As XmlNode = WriteBinary(document, stream.ToArray()) parent.AppendChild(binaryNode) Else Return False End If   Return True End Function   Private Sub WriteCollection(ByVal document As XmlDocument, ByVal list As IList, ByVal parent As XmlNode) For Each obj In list Dim node As XmlNode = document.CreateElement("Item") Dim typeAttr = document.CreateAttribute("type") typeAttr.Value = obj.GetType().AssemblyQualifiedName node.Attributes.Append(typeAttr) WriteValue(document, obj, node) parent.AppendChild(node) Next End Sub   Private Function WriteBinary(ByVal document As XmlDocument, ByVal value As Byte()) As XmlNode Dim node As XmlNode = document.CreateElement("Binary") node.InnerText = Convert.ToBase64String(value) Return node End Function   Private Function WriteInstanceDescriptor(ByVal document As XmlDocument, ByVal desc As InstanceDescriptor, ByVal value As Object) As XmlNode Dim node As XmlNode = document.CreateElement("InstanceDescriptor") Dim formatter As BinaryFormatter = New BinaryFormatter() Dim stream As MemoryStream = New MemoryStream() formatter.Serialize(stream, desc.MemberInfo) Dim memberAttr = document.CreateAttribute("member") memberAttr.Value = Convert.ToBase64String(stream.ToArray()) node.Attributes.Append(memberAttr)   For Each arg In desc.Arguments Dim argNode As XmlNode = document.CreateElement("Argument")   If WriteValue(document, arg, argNode) Then node.AppendChild(argNode) End If Next   If Not desc.IsComplete Then Dim props = TypeDescriptor.GetProperties(value, propertyAttributes) WriteProperties(document, props, value, node, "Property") End If   Return node End Function     #End Region   #Region "DeSerialize - Load"   ''' <summary> ''' This method is used to parse the given file. Before calling this ''' method the host member variable must be setup. This method will ''' create a data set, read the data set from the XML stored in the ''' file, and then walk through the data set and create components ''' stored within it. The data set is stored in the persistedData ''' member variable upon return. ''' ''' This method never throws exceptions. It will set the successful ''' ref parameter to false when there are catastrophic errors it can't ''' resolve (like being unable to parse the XML). All error exceptions ''' are added to the errors array list, including minor errors. ''' </summary> Private Function ReadFile(ByVal fileName As String, ByVal errors As ArrayList, <Out> ByRef document As XmlDocument) As String Dim baseClass As String = Nothing     ' Anything unexpected is a fatal error. ' Try ' The main form and items in the component tray will be at the ' same level, so we have to create a higher super-root in order ' to construct our XmlDocument. Dim sr As StreamReader = New StreamReader(fileName) Dim cleandown As String = sr.ReadToEnd() cleandown = "<DOCUMENT_ELEMENT>" & cleandown & "</DOCUMENT_ELEMENT>" Dim doc As XmlDocument = New XmlDocument() doc.LoadXml(cleandown)     ' Now, walk through the document's elements. ' For Each node As XmlNode In doc.DocumentElement.ChildNodes   If Equals(baseClass, Nothing) Then baseClass = node.Attributes("name").Value End If   If node.Name.Equals("Object") Then ReadObject(node, errors) Else errors.Add(String.Format("Node type {0} is not allowed here.", node.Name)) End If Next   document = doc Catch ex As Exception document = Nothing errors.Add(ex) End Try   Return baseClass End Function   Private Sub ReadEvent(ByVal childNode As XmlNode, ByVal instance As Object, ByVal errors As ArrayList) Dim bindings As IEventBindingService = TryCast(host.GetService(GetType(IEventBindingService)), IEventBindingService)   If bindings Is Nothing Then errors.Add("Unable to contact event binding service so we can't bind any events") Return End If   Dim nameAttr = childNode.Attributes("name")   If nameAttr Is Nothing Then errors.Add("No event name") Return End If   Dim methodAttr = childNode.Attributes("method")   If methodAttr Is Nothing OrElse Equals(methodAttr.Value, Nothing) OrElse methodAttr.Value.Length = 0 Then errors.Add(String.Format("Event {0} has no method bound to it")) Return End If   Dim evt = TypeDescriptor.GetEvents(instance)(nameAttr.Value)   If evt Is Nothing Then errors.Add(String.Format("Event {0} does not exist on {1}", nameAttr.Value, instance.GetType().FullName)) Return End If   Dim prop = bindings.GetEventProperty(evt) Debug.Assert(prop IsNot Nothing, "Bad event binding service")   Try prop.SetValue(instance, methodAttr.Value) Catch ex As Exception errors.Add(ex.Message) End Try End Sub   Private Function ReadInstanceDescriptor(ByVal node As XmlNode, ByVal errors As ArrayList) As Object ' First, need to deserialize the member ' Dim memberAttr = node.Attributes("member")   If memberAttr Is Nothing Then errors.Add("No member attribute on instance descriptor") Return Nothing End If   Dim data = Convert.FromBase64String(memberAttr.Value) Dim formatter As BinaryFormatter = New BinaryFormatter() Dim stream As MemoryStream = New MemoryStream(data) Dim mi = CType(formatter.Deserialize(stream), MemberInfo) Dim args As Object() = Nothing     ' Check to see if this member needs arguments. If so, gather ' them from the XML. If TypeOf mi Is MethodBase Then Dim paramInfos As ParameterInfo() = CType(mi, MethodBase).GetParameters() args = New Object(paramInfos.Length - 1) {} Dim idx = 0   For Each child As XmlNode In node.ChildNodes   If child.Name.Equals("Argument") Then Dim value As Object   If Not ReadValue(child, TypeDescriptor.GetConverter(paramInfos(idx).ParameterType), errors, value) Then Return Nothing End If   args(Math.Min(Threading.Interlocked.Increment(idx), idx - 1)) = value End If Next   If idx <> paramInfos.Length Then errors.Add(String.Format("Member {0} requires {1} arguments, not {2}.", mi.Name, args.Length, idx)) Return Nothing End If End If   Dim id As InstanceDescriptor = New InstanceDescriptor(mi, args) Dim instance As Object = id.Invoke()     ' Ok, we have our object. Now, check to see if there are any properties, and if there are, ' set them. ' For Each prop As XmlNode In node.ChildNodes   If prop.Name.Equals("Property") Then ReadProperty(prop, instance, errors) End If Next   Return instance End Function   ''' Reads the "Object" tags. This returns an instance of the ''' newly created object. Returns null if there was an error. Private Function ReadObject(ByVal node As XmlNode, ByVal errors As ArrayList) As Object Dim typeAttr = node.Attributes("type")   If typeAttr Is Nothing Then errors.Add("<Object> tag is missing required type attribute") Return Nothing End If   Dim type = System.Type.GetType(typeAttr.Value)   If type Is Nothing Then errors.Add(String.Format("Type {0} could not be loaded.", typeAttr.Value)) Return Nothing End If     ' This can be null if there is no name for the object. ' Dim nameAttr = node.Attributes("name") Dim instance As Object   If GetType(IComponent).IsAssignableFrom(type) Then   If nameAttr Is Nothing Then instance = host.CreateComponent(type) Else instance = host.CreateComponent(type, nameAttr.Value) End If Else instance = Activator.CreateInstance(type) End If     ' Got an object, now we must process it. Check to see if this tag ' offers a child collection for us to add children to. ' Dim childAttr = node.Attributes("children") Dim childList As IList = Nothing   If childAttr IsNot Nothing Then Dim childProp = TypeDescriptor.GetProperties(instance)(childAttr.Value)   If childProp Is Nothing Then errors.Add(String.Format("The children attribute lists {0} as the child collection but this is not a property on {1}", childAttr.Value, instance.GetType().FullName)) Else childList = TryCast(childProp.GetValue(instance), IList)   If childList Is Nothing Then errors.Add(String.Format("The property {0} was found but did not return a valid IList", childProp.Name)) End If End If End If     ' Now, walk the rest of the tags under this element. ' For Each childNode As XmlNode In node.ChildNodes   If childNode.Name.Equals("Object") Then   ' Another object. In this case, create the object, and ' parent it to ours using the children property. If there ' is no children property, bail out now. If childAttr Is Nothing Then errors.Add("Child object found but there is no children attribute") Continue For End If     ' no sense doing this if there was an error getting the property. We've already reported the ' error above. If childList IsNot Nothing Then Dim childInstance = ReadObject(childNode, errors) childList.Add(childInstance) End If ElseIf childNode.Name.Equals("Property") Then ' A property. Ask the property to parse itself. ' ReadProperty(childNode, instance, errors) ElseIf childNode.Name.Equals("Event") Then ' An event. Ask the event to parse itself. ' ReadEvent(childNode, instance, errors) End If Next   Return instance End Function   ''' Parses the given XML node and sets the resulting property value. Private Sub ReadProperty(ByVal node As XmlNode, ByVal instance As Object, ByVal errors As ArrayList) Dim nameAttr = node.Attributes("name")   If nameAttr Is Nothing Then errors.Add("Property has no name") Return End If   Dim prop = TypeDescriptor.GetProperties(instance)(nameAttr.Value)   If prop Is Nothing Then errors.Add(String.Format("Property {0} does not exist on {1}", nameAttr.Value, instance.GetType().FullName)) Return End If     ' Get the type of this property. We have three options: ' 1. A normal read/write property. ' 2. A "Content" property. ' 3. A collection. ' Dim isContent = prop.Attributes.Contains(DesignerSerializationVisibilityAttribute.Content)   If isContent Then Dim value = prop.GetValue(instance)     ' Handle the case of a content property that is a collection. ' If TypeOf value Is IList Then   For Each child As XmlNode In node.ChildNodes   If child.Name.Equals("Item") Then Dim item As Integer Dim typeAttr = child.Attributes("type")   If typeAttr Is Nothing Then errors.Add("Item has no type attribute") Continue For End If   Dim type = System.Type.GetType(typeAttr.Value)   If type Is Nothing Then errors.Add(String.Format("Item type {0} could not be found.", typeAttr.Value)) Continue For End If   If ReadValue(child, TypeDescriptor.GetConverter(type), errors, item) Then   Try CType(value, IList).Add(item) Catch ex As Exception errors.Add(ex.Message) End Try End If Else errors.Add(String.Format("Only Item elements are allowed in collections, not {0} elements.", child.Name)) End If Next Else   ' Handle the case of a content property that consists of child properties. ' For Each child As XmlNode In node.ChildNodes   If child.Name.Equals("Property") Then ReadProperty(child, value, errors) Else errors.Add(String.Format("Only Property elements are allowed in content properties, not {0} elements.", child.Name)) End If Next End If Else Dim value As Integer   If ReadValue(node, prop.Converter, errors, value) Then   ' ReadValue succeeded. Fill in the property value. ' Try prop.SetValue(instance, value) Catch ex As Exception errors.Add(ex.Message) End Try End If End If End Sub   ''' Generic function to read an object value. Returns true if the read ''' succeeded. Private Function ReadValue(ByVal node As XmlNode, ByVal converter As TypeConverter, ByVal errors As ArrayList, <Out> ByRef value As Object) As Boolean Try   For Each child As XmlNode In node.ChildNodes   If child.NodeType = XmlNodeType.Text Then value = converter.ConvertFromInvariantString(node.InnerText) Return True ElseIf child.Name.Equals("Binary") Then Dim data = Convert.FromBase64String(child.InnerText)     ' Binary blob. Now, check to see if the type converter ' can convert it. If not, use serialization. ' If GetConversionSupported(converter, GetType(Byte())) Then value = converter.ConvertFrom(Nothing, CultureInfo.InvariantCulture, data) Return True Else Dim formatter As BinaryFormatter = New BinaryFormatter() Dim stream As MemoryStream = New MemoryStream(data) value = formatter.Deserialize(stream) Return True End If ElseIf child.Name.Equals("InstanceDescriptor") Then value = ReadInstanceDescriptor(child, errors) Return value IsNot Nothing Else errors.Add(String.Format("Unexpected element type {0}", child.Name)) value = Nothing Return False End If Next     ' If we get here, it is because there were no nodes. No nodes and no inner ' text is how we signify null. ' value = Nothing Return True Catch ex As Exception errors.Add(ex.Message) value = Nothing Return False End Try End Function     #End Region   #Region "Public methods"   ''' This method writes out the contents of our designer in XML. ''' It writes out the contents of xmlDocument. Public Function GetCode() As String Flush() Dim sw As StringWriter sw = New StringWriter() Dim xtw As XmlTextWriter = New XmlTextWriter(sw) xtw.Formatting = Formatting.Indented xmlDocument.WriteTo(xtw) Dim cleanup As String = sw.ToString().Replace("<DOCUMENT_ELEMENT>", "") cleanup = cleanup.Replace("</DOCUMENT_ELEMENT>", "") sw.Close() Return cleanup End Function   Public Sub Save() Save(False) End Sub     ''' <summary> ''' Save the current state of the loader. If the user loaded the file ''' or saved once before, then he doesn't need to select a file again. ''' Unless this is being called as a result of "Save As..." being clicked, ''' in which case forceFilePrompt will be true. ''' </summary>   Public Sub Save(ByVal forceFilePrompt As Boolean) Try Flush() Dim filterIndex = 3   If Equals(fileName, Nothing) OrElse forceFilePrompt Then Dim dlg As SaveFileDialog = New SaveFileDialog() dlg.DefaultExt = "xml" dlg.Filter = "XML Files|*.xml"   If dlg.ShowDialog() = DialogResult.OK Then fileName = dlg.FileName   filterIndex = dlg.FilterIndex   End If End If   If Not Equals(fileName, Nothing) Then   Select Case filterIndex Case 1 ' Write out our xmlDocument to a file. Dim sw As StringWriter = New StringWriter() Dim xtw As XmlTextWriter = New XmlTextWriter(sw) xtw.Formatting = Formatting.Indented xmlDocument.WriteTo(xtw)   ' Get rid of our artificial super-root before we save out ' the XML. ' Dim cleanup As String = sw.ToString().Replace("<DOCUMENT_ELEMENT>", "") cleanup = cleanup.Replace("</DOCUMENT_ELEMENT>", "") xtw.Close() Dim file As StreamWriter = New StreamWriter(fileName) file.Write(cleanup) file.Close() End Select   unsaved = False End If   Catch ex As Exception MessageBox.Show("Error during save: " & ex.ToString()) End Try End Sub #End Region   End Class ' class End Namespace ' namespace

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La classe HostSurface.vb

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Imports System Imports System.Collections Imports System.ComponentModel Imports System.ComponentModel.Design Imports System.ComponentModel.Design.Serialization Imports System.Drawing Imports System.Windows.Forms Imports System.Diagnostics Imports DevComponents.DotNetBar   Namespace OSMaker ''' <summary> ''' Inherits from DesignSurface and hosts the RootComponent and ''' all other designers. It also uses loaders (BasicDesignerLoader ''' or CodeDomDesignerLoader) when required. It also provides various ''' services to the designers. Adds MenuCommandService which is used ''' for Cut, Copy, Paste, etc. ''' </summary> Public Class HostSurface Inherits DesignSurface   Private _loader As BasicDesignerLoader Private _selectionService As ISelectionService   Public Sub New() MyBase.New() AddService(GetType(IMenuCommandService), New MenuCommandService(Me)) End Sub   Public Sub New(ByVal parentProvider As IServiceProvider) MyBase.New(parentProvider) AddService(GetType(IMenuCommandService), New MenuCommandService(Me)) End Sub   Friend Sub Initialize() Dim control As Control = Nothing Dim host = CType(GetService(GetType(IDesignerHost)), IDesignerHost)   If host Is Nothing Then Return   Try ' Set the backcolor Dim hostType As Type = host.RootComponent.GetType()   If hostType Is GetType(Form) Then control = TryCast(View, Control) control.BackColor = System.Drawing.Color.FromArgb(CType(CType(30, Byte), Integer), CType(CType(30, Byte), Integer), CType(CType(30, Byte), Integer)) control.Dock = DockStyle.Fill ElseIf hostType Is GetType(UserControl) Then control = TryCast(View, Control) control.BackColor = Color.White ElseIf hostType Is GetType(Component) Then control = TryCast(View, Control) control.BackColor = Color.FloralWhite Else Throw New Exception("Undefined Host Type: " & hostType.ToString()) End If     ' Set SelectionService - SelectionChanged event handler _selectionService = CType(ServiceContainer.GetService(GetType(ISelectionService)), ISelectionService) AddHandler _selectionService.SelectionChanged, New EventHandler(AddressOf selectionService_SelectionChanged) Catch ex As Exception Trace.WriteLine(ex.ToString()) End Try End Sub   Public Property Loader As BasicDesignerLoader Get Return _loader End Get Set(ByVal value As BasicDesignerLoader) _loader = value End Set End Property     ''' <summary> ''' When the selection changes this sets the PropertyGrid's selected component ''' </summary> Private Sub selectionService_SelectionChanged(ByVal sender As Object, ByVal e As EventArgs) If _selectionService IsNot Nothing Then Dim selectedComponents As ICollection = _selectionService.GetSelectedComponents() Dim propertyGrid = CType(GetService(GetType(DevComponents.DotNetBar.AdvPropertyGrid)), DevComponents.DotNetBar.AdvPropertyGrid) Dim comps = New Object(selectedComponents.Count - 1) {} Dim i = 0   For Each o In selectedComponents comps(i) = o i += 1 Next   propertyGrid.SelectedObjects = comps   End If End Sub   Public Sub AddService(ByVal type As Type, ByVal serviceInstance As Object) ServiceContainer.AddService(type, serviceInstance) End Sub End Class ' class End Namespace ' namespace

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Control utilisateur HostControl.vb

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Imports System Imports System.ComponentModel Imports System.ComponentModel.Design Imports System.Drawing Imports System.Windows.Forms Imports System.Diagnostics   Namespace OSMaker ''' <summary> ''' Hosts the HostSurface which inherits from DesignSurface. ''' </summary> Public Class HostControl Inherits UserControl   ''' <summary> ''' Required designer variable. ''' </summary> Private components As IContainer = Nothing Private _hostSurface As HostSurface Private _hostSurfaceManager As HostSurfaceManager   Friend Sub New(ByVal hostSurface As HostSurface) ' This call is required by the Windows.Forms Form Designer. InitializeComponent() InitializeHost(hostSurface) End Sub     ''' <summary> ''' Clean up any resources being used. ''' </summary> Protected Overrides Sub Dispose(ByVal disposing As Boolean) If disposing Then If components IsNot Nothing Then components.Dispose() End If   MyBase.Dispose(disposing) End Sub     #Region "Component Designer generated code" ''' <summary> ''' Required method for Designer support - do not modify ''' the contents of this method with the code editor. ''' </summary> Private Sub InitializeComponent() Me.ContextMenuBar1 = New DevComponents.DotNetBar.ContextMenuBar() Me.ButtonItem1 = New DevComponents.DotNetBar.ButtonItem() Me.ButtonItem2 = New DevComponents.DotNetBar.ButtonItem() Me.ButtonItem3 = New DevComponents.DotNetBar.ButtonItem() CType(Me.ContextMenuBar1, System.ComponentModel.ISupportInitialize).BeginInit() Me.SuspendLayout() ' 'ContextMenuBar1 ' Me.ContextMenuBar1.AntiAlias = True Me.ContextMenuBar1.Font = New System.Drawing.Font("Segoe UI", 9.0!) Me.ContextMenuBar1.IsMaximized = False Me.ContextMenuBar1.Items.AddRange(New DevComponents.DotNetBar.BaseItem() {Me.ButtonItem1}) Me.ContextMenuBar1.Location = New System.Drawing.Point(331, 211) Me.ContextMenuBar1.Name = "ContextMenuBar1" Me.ContextMenuBar1.Size = New System.Drawing.Size(75, 25) Me.ContextMenuBar1.Stretch = True Me.ContextMenuBar1.Style = DevComponents.DotNetBar.eDotNetBarStyle.StyleManagerControlled Me.ContextMenuBar1.TabIndex = 0 Me.ContextMenuBar1.TabStop = False Me.ContextMenuBar1.Text = "ContextMenuBar1" ' 'ButtonItem1 ' Me.ButtonItem1.AutoExpandOnClick = True Me.ButtonItem1.Name = "ButtonItem1" Me.ButtonItem1.SubItems.AddRange(New DevComponents.DotNetBar.BaseItem() {Me.ButtonItem2, Me.ButtonItem3}) Me.ButtonItem1.Text = "ButtonItem1" ' 'ButtonItem2 ' Me.ButtonItem2.Name = "ButtonItem2" Me.ButtonItem2.Text = "ButtonItem2" ' 'ButtonItem3 ' Me.ButtonItem3.Name = "ButtonItem3" Me.ButtonItem3.Text = "ButtonItem3" ' 'HostControl ' Me.BackColor = System.Drawing.Color.FromArgb(CType(CType(30, Byte), Integer), CType(CType(30, Byte), Integer), CType(CType(30, Byte), Integer)) Me.ContextMenuBar1.SetContextMenuEx(Me, Me.ButtonItem1) Me.Controls.Add(Me.ContextMenuBar1) Me.Name = "HostControl" Me.Size = New System.Drawing.Size(484, 346) CType(Me.ContextMenuBar1, System.ComponentModel.ISupportInitialize).EndInit() Me.ResumeLayout(False)   End Sub   #End Region   Friend Sub InitializeHost(ByVal hostSurface As HostSurface) Try If hostSurface Is Nothing Then Return _hostSurface = hostSurface   Dim Control As Control = TryCast(_hostSurface.View, Control)   Control.Parent = Me Control.Dock = DockStyle.Fill Control.Visible = True   Catch ex As Exception Trace.WriteLine(ex.ToString()) End Try End Sub   Friend ReadOnly Property HostSurface As HostSurface Get Return _hostSurface End Get End Property Public Class codee   End Class     Friend ReadOnly Property DesignerHost As IDesignerHost Get Return CType(_hostSurface.GetService(GetType(IDesignerHost)), IDesignerHost) End Get End Property   Private Sub HostControl_Load(sender As Object, e As EventArgs) Handles MyBase.Load   Me.Dock = DockStyle.Fill   End Sub   Private Sub Timer1_Tick(sender As Object, e As EventArgs)     End Sub   Friend WithEvents ContextMenuBar1 As DevComponents.DotNetBar.ContextMenuBar Friend WithEvents ButtonItem1 As DevComponents.DotNetBar.ButtonItem Friend WithEvents ButtonItem2 As DevComponents.DotNetBar.ButtonItem Friend WithEvents ButtonItem3 As DevComponents.DotNetBar.ButtonItem End Class ' class End Namespace ' namespace

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Hostsurfacemanager.vb

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Imports System Imports System.ComponentModel Imports System.ComponentModel.Design Imports System.ComponentModel.Design.Serialization Imports System.Windows.Forms Imports System.IO Imports System.Windows.Forms.Design   Imports System.CodeDom     Namespace OSMaker Public Enum LoaderType BasicDesignerLoader = 1 CodeDomDesignerLoader = 2 NoLoader = 3 End Enum     ''' <summary> ''' Manages numerous HostSurfaces. Any services added to HostSurfaceManager ''' will be accessible to all HostSurfaces ''' </summary> Friend Class HostSurfaceManager Inherits DesignSurfaceManager   Public Sub New() MyBase.New() AddService(GetType(INameCreationService), New NameCreationService()) AddHandler ActiveDesignSurfaceChanged, New ActiveDesignSurfaceChangedEventHandler(AddressOf HostSurfaceManager_ActiveDesignSurfaceChanged) End Sub   Protected Overrides Function CreateDesignSurfaceCore(ByVal parentProvider As IServiceProvider) As DesignSurface Return New HostSurface(parentProvider)   End Function     ''' <summary> ''' Gets a new HostSurface and loads it with the appropriate type of ''' root component. ''' </summary> Private Function GetNewHost(ByVal rootComponentType As Type) As HostControl Dim hostSurface = CType(CreateDesignSurface(ServiceContainer), HostSurface)     If rootComponentType Is GetType(Form) Then hostSurface.BeginLoad(GetType(Form)) ElseIf rootComponentType Is GetType(UserControl) Then hostSurface.BeginLoad(GetType(UserControl)) ElseIf rootComponentType Is GetType(Component) Then hostSurface.BeginLoad(GetType(Component)) ElseIf rootComponentType Is GetType(MyTopLevelComponent) Then hostSurface.BeginLoad(GetType(MyTopLevelComponent)) Else Throw New Exception("Undefined Host Type: " & rootComponentType.ToString()) End If   hostSurface.Initialize() ActiveDesignSurface = hostSurface Return New HostControl(hostSurface) End Function     ''' <summary> ''' Gets a new HostSurface and loads it with the appropriate type of ''' root component. Uses the appropriate Loader to load the HostSurface. ''' </summary> Public Function GetNewHost(ByVal rootComponentType As Type, ByVal loaderType As LoaderType) As HostControl If loaderType = LoaderType.NoLoader Then Return GetNewHost(rootComponentType) Dim hostSurface = CType(CreateDesignSurface(ServiceContainer), HostSurface) Dim host = CType(hostSurface.GetService(GetType(IDesignerHost)), IDesignerHost)   Select Case loaderType   Case LoaderType.BasicDesignerLoader Dim basicHostLoader As Loader.BasicHostLoader = New Loader.BasicHostLoader(rootComponentType) hostSurface.BeginLoad(basicHostLoader) hostSurface.Loader = basicHostLoader Case LoaderType.CodeDomDesignerLoader Dim codeDomHostLoader As Loader.CodeDomHostLoader = New Loader.CodeDomHostLoader() hostSurface.BeginLoad(codeDomHostLoader) hostSurface.Loader = codeDomHostLoader Case Else Throw New Exception("Loader is not defined: " & loaderType.ToString()) End Select   hostSurface.Initialize() Return New HostControl(hostSurface) End Function     ''' <summary> ''' Opens an Xml file and loads it up using BasicHostLoader (inherits from ''' BasicDesignerLoader) ''' </summary> Public Function GetNewHost(ByVal fileName As String) As HostControl If Equals(fileName, Nothing) OrElse Not File.Exists(fileName) Then MessageBox.Show("FileName is incorrect: " & fileName) Dim loaderType As LoaderType = LoaderType.NoLoader If fileName.EndsWith("xml") Then loaderType = LoaderType.BasicDesignerLoader   If loaderType = LoaderType.NoLoader OrElse loaderType = LoaderType.CodeDomDesignerLoader Then Throw New Exception("File cannot be opened. Please check the type or extension of the file. Supported format is Xml") End If   Dim hostSurface = CType(CreateDesignSurface(ServiceContainer), HostSurface) Dim host = CType(hostSurface.GetService(GetType(IDesignerHost)), IDesignerHost)   Dim basicHostLoader As Loader.BasicHostLoader = New Loader.BasicHostLoader(fileName)   hostSurface.BeginLoad(basicHostLoader) hostSurface.Loader = basicHostLoader hostSurface.Initialize() Return New HostControl(hostSurface) End Function   Public Sub AddService(ByVal type As Type, ByVal serviceInstance As Object) ServiceContainer.AddService(type, serviceInstance)   End Sub     ''' <summary> ''' Uses the OutputWindow service and writes out to it. ''' </summary> Private Sub HostSurfaceManager_ActiveDesignSurfaceChanged(ByVal sender As Object, ByVal e As ActiveDesignSurfaceChangedEventArgs) ' Dim o As ToolWindows.OutputWindow = TryCast(GetService(GetType(ToolWindows.OutputWindow)), ToolWindows.OutputWindow) 'o.RichTextBox.Text += "New host added." & Microsoft.VisualBasic.Constants.vbLf End Sub End Class ' class End Namespace ' namespace

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Comment faire pour implémenter un ContextMenuStrip (couper,copier,coller,undo,redo,premier plan...) sur le concepteur et surtout faire fonctionner les autres commande que seulement delete la seule qui fonctionne actuellement? J'ai essayé de m'aider de la source https://github.com/veler/SoftwareZat...teurFenetre.vb mais je n'ai pas réussi.

voici une doc en C# https://docs.microsoft.com/fr-fr/dot...ew=netcore-3.1

Je vous remercie pour votre aide en C# ou en VB.Net

bonjour
En convertissant le code du Shell en question du c# vers vb.net ,tu as du loupé quelque chose ou beaucoup de choses car le Shell en question :
- utilise un MainMenu (et ses MainMenuItem enfants) qu'il suffit de substituer par un ContextMenuStrip

-toutes les commandes Cut,Paste,Delete etc...du Shell fonctionne comme des charmes.

Ton devoir est à revoir ...

Bonjour je reprend le relais de mon collaborateur,
les fichiers vb.net sont traduits mot pour mot , peut-être que ça fonctionne avec les autres loader (codedom) mais quand on sélectionne basichostloader dans le projet Shell on remarque que le menu Edit n'est plus cliquable (peut-être un signe que ce n'est pas codé pour Basichostloader dans le projet Schell) . Même en C# les commandes copy,paste etc ne fonctionnent pas mais encore une fois le problème ne viens pas de la traduction, simplement du fait que je ne parvient pas à coder ce qu'il faut pour.
Merci

rebonjour

Mr Le Roi (je plaisante) , mais la littérature Microsoft est toujours verbeuse sur ce
le sujet dit du "DesignerHost" et j'allais dire foireuse(articles MSDN)
Je suis maintenant amplement convaincu concernant l'article (mentionné) qui a été certainement produit par un "nègre"(pigiste hindoue) des articles MSDN.
Lorsque j'ai consulte la MSDN Lib Fr (edition complete de VS 2008).
J'ai trouve ce bref article :

Citation:

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Knowledge Base

INFO: Code Sample That Demonstrates How to Create a Custom Form Designer by Using Visual C# .NET
This article contains a code sample that demonstrates how to create a custom form designer by using Microsoft Visual C# .NET. Microsoft does not provide Microsoft Product Support Services or support hotfixes for this code sample.

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lien de téléchargement du "designerhost" mentionné ci-dessus:
http://download.microsoft.com/downlo...signerhost.exe

Eh bien ce "designerhost" est un vrai razoir d’Occam :
- il comporte un seul "loader"
- mais "serialize" et édite les trois type de fichier source : codedom .cs,.vb et miraculous xml
- sauvegarde également les trois type de fichier source

- peut recharger un projet sauvegarde quelque soit le source(.cs,.vb ou xml)
- gère cut,copy,paste et delete sur la surface de designer (un Form par défaut est créé grâce au menu New)

Comment cela se peut-il ?
Eh bien le "DesignerHost" fait appel à 2 services de serialization :
-l'habituel CodeDomComponentSerializationService
-& un "custom serializer" qui broie tout même les controls dont le code original figurant dans le lien de telechargement est donné ci après:

Code:

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using System; using System.Collections.Generic; using System.ComponentModel.Design.Serialization; using System.ComponentModel.Design; using System.Collections; using System.Windows.Forms;   namespace SampleDesignerApplication { class DesignerSerializationServiceImpl : IDesignerSerializationService { private IServiceContainer serviceProvider=null;   public DesignerSerializationServiceImpl(IServiceContainer serviceContainer) { serviceProvider = serviceContainer; } public System.Collections.ICollection Deserialize(object serializationData) {   return this.Deserialize(serializationData); }   public object Serialize(System.Collections.ICollection objects) {   return this.Serialize(objects);   } } }

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Mais ce code du "custom serializer" est bogué car il entre dans une boucle infinie qui finit dans un "stackoverflow" pénible des qu'on clique sur les commandes de menu "Cut" ou "Copy"
il convient donc de le remplacer par ce qui suit(revu et corrigé) :

Code:

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using System; using System.Collections.Generic; using System.ComponentModel.Design.Serialization; using System.ComponentModel.Design; using System.Collections; using System.Windows.Forms;   namespace SampleDesignerApplication { class DesignerSerializationServiceImpl : IDesignerSerializationService { private IServiceContainer serviceProvider=null;   public DesignerSerializationServiceImpl(IServiceContainer serviceContainer) { serviceProvider = serviceContainer; } public System.Collections.ICollection Deserialize(object serializationData) { SerializationStore serializationStore = serializationData as SerializationStore;   if (serializationStore != null) {   ComponentSerializationService componentSerializationService = serviceProvider.GetService(typeof(ComponentSerializationService)) as ComponentSerializationService;   ICollection collection = componentSerializationService.Deserialize(serializationStore);   return collection;   }   return new object[0];   //return this.Deserialize(serializationData); }   public object Serialize(System.Collections.ICollection objects) { ComponentSerializationService componentSerializationService = serviceProvider.GetService(typeof(ComponentSerializationService)) as ComponentSerializationService;   SerializationStore returnObject = null; using (SerializationStore serializationStore = componentSerializationService.CreateStore()) { foreach (object obj in objects) { if (obj is Control) { componentSerializationService.Serialize(serializationStore, obj); }   }   returnObject = serializationStore;   }   return returnObject; //return this.Serialize(objects);   } } }

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On peut parfois être induit sur une fausse route par des "codeurs" du dimanche mais il ne faut jamais renoncer à ses objectifs.

En espérant que Le Roi sera satisfait ce soir.
Bon design.