C# CodeDom.CodeEventReferenceExpression类代码示例

		public override void Serialize (IDesignerSerializationManager manager, object value, MemberDescriptor descriptor, CodeStatementCollection statements)
		{
			if (statements == null)
				throw new ArgumentNullException ("statements");
			if (manager == null)
				throw new ArgumentNullException ("manager");
			if (value == null)
				throw new ArgumentNullException ("value");
			if (descriptor == null)
				throw new ArgumentNullException ("descriptor");

			IEventBindingService service = manager.GetService (typeof (IEventBindingService)) as IEventBindingService;
			if (service != null) {
				// In the propertygrid the events are represented by PropertyDescriptors and the value is a string
				// which contains the method name to bind to. The propertydescriptors are managed and created by the 
				// IEventBindingService
				// 
				EventDescriptor ev = (EventDescriptor) descriptor;
				string methodName = (string) service.GetEventProperty (ev).GetValue (value);
				CodeDelegateCreateExpression listener = new CodeDelegateCreateExpression (new CodeTypeReference (ev.EventType), _thisReference, methodName);
				CodeExpression targetObject = base.SerializeToExpression (manager, value);
				CodeEventReferenceExpression eventRef = new CodeEventReferenceExpression (targetObject, ev.Name);
				statements.Add (new CodeAttachEventStatement (eventRef, listener));
			}
		}

		public void Constructor1 ()
		{
			CodeEventReferenceExpression eventref = new CodeEventReferenceExpression ();
			CodeExpression listener = new CodeExpression ();

			CodeRemoveEventStatement caes = new CodeRemoveEventStatement (eventref, listener);
			Assert.AreSame (eventref, caes.Event, "#1");
			Assert.AreEqual (string.Empty, caes.Event.EventName, "#2");
			Assert.IsNull (caes.Event.TargetObject, "#3");
			Assert.AreSame (listener, caes.Listener, "#4");

			caes.Event = null;
			Assert.IsNotNull (caes.Event, "#5");
			Assert.AreEqual (string.Empty, caes.Event.EventName, "#6");
			Assert.IsNull (caes.Event.TargetObject, "#7");
			Assert.AreSame (listener, caes.Listener, "#8");

			caes.Listener = null;
			Assert.IsNull (caes.Listener, "#9");

			caes.Event = eventref;
			Assert.AreSame (eventref, caes.Event, "#10");

			caes.Listener = listener;
			Assert.AreSame (listener, caes.Listener, "#11");

			caes = new CodeRemoveEventStatement ((CodeEventReferenceExpression) null, (CodeExpression) null);
			Assert.IsNotNull (caes.Event, "#12");
			Assert.IsNull (caes.Listener, "#13");
			Assert.AreEqual (string.Empty, caes.Event.EventName, "#14");
			Assert.IsNull (caes.Event.TargetObject, "#15");
		}

 internal static void AddCallbackImplementation(CodeTypeDeclaration codeClass, string callbackName, string handlerName, string handlerArgs, bool methodHasOutParameters)
 {
     CodeFlags[] parameterFlags = new CodeFlags[1];
     CodeMemberMethod method = AddMethod(codeClass, callbackName, parameterFlags, new string[] { typeof(object).FullName }, new string[] { "arg" }, typeof(void).FullName, null, (CodeFlags) 0);
     CodeEventReferenceExpression left = new CodeEventReferenceExpression(new CodeThisReferenceExpression(), handlerName);
     CodeBinaryOperatorExpression condition = new CodeBinaryOperatorExpression(left, CodeBinaryOperatorType.IdentityInequality, new CodePrimitiveExpression(null));
     CodeStatement[] trueStatements = new CodeStatement[2];
     trueStatements[0] = new CodeVariableDeclarationStatement(typeof(InvokeCompletedEventArgs), "invokeArgs", new CodeCastExpression(typeof(InvokeCompletedEventArgs), new CodeArgumentReferenceExpression("arg")));
     CodeVariableReferenceExpression targetObject = new CodeVariableReferenceExpression("invokeArgs");
     CodeObjectCreateExpression expression4 = new CodeObjectCreateExpression();
     if (methodHasOutParameters)
     {
         expression4.CreateType = new CodeTypeReference(handlerArgs);
         expression4.Parameters.Add(new CodePropertyReferenceExpression(targetObject, "Results"));
     }
     else
     {
         expression4.CreateType = new CodeTypeReference(typeof(AsyncCompletedEventArgs));
     }
     expression4.Parameters.Add(new CodePropertyReferenceExpression(targetObject, "Error"));
     expression4.Parameters.Add(new CodePropertyReferenceExpression(targetObject, "Cancelled"));
     expression4.Parameters.Add(new CodePropertyReferenceExpression(targetObject, "UserState"));
     trueStatements[1] = new CodeExpressionStatement(new CodeDelegateInvokeExpression(new CodeEventReferenceExpression(new CodeThisReferenceExpression(), handlerName), new CodeExpression[] { new CodeThisReferenceExpression(), expression4 }));
     method.Statements.Add(new CodeConditionStatement(condition, trueStatements, new CodeStatement[0]));
 }

		public override void Serialize (IDesignerSerializationManager manager, object value, MemberDescriptor descriptor, 
						CodeStatementCollection statements)
		{
			if (statements == null)
				throw new ArgumentNullException ("statements");
			if (manager == null)
				throw new ArgumentNullException ("manager");
			if (value == null)
				throw new ArgumentNullException ("value");
			if (descriptor == null)
				throw new ArgumentNullException ("descriptor");

			IEventBindingService service = manager.GetService (typeof (IEventBindingService)) as IEventBindingService;
			if (service != null) {
				EventDescriptor eventDescriptor = (EventDescriptor) descriptor;
				string methodName = (string) service.GetEventProperty (eventDescriptor).GetValue (value);

				if (methodName != null) {
					CodeDelegateCreateExpression listener = new CodeDelegateCreateExpression (new CodeTypeReference (eventDescriptor.EventType),
																							   _thisReference, methodName);
					CodeExpression targetObject = base.SerializeToExpression (manager, value);
					CodeEventReferenceExpression eventRef = new CodeEventReferenceExpression (targetObject, eventDescriptor.Name);
					statements.Add (new CodeAttachEventStatement (eventRef, listener));
				}
			}
		}

		public CodeAttachEventStatement (CodeExpression targetObject,
						 string eventName, 
						 CodeExpression listener)
		{
			this.eventRef = new CodeEventReferenceExpression (targetObject,
																eventName);
			this.listener = listener;
		}

		public void Constructor0_Deny_Unrestricted ()
		{
			CodeEventReferenceExpression cere = new CodeEventReferenceExpression ();
			Assert.AreEqual (String.Empty, cere.EventName, "EventName");
			cere.EventName = "mono";
			Assert.IsNull (cere.TargetObject, "TargetObject");
			cere.TargetObject = new CodeExpression ();
		}

 public static CodeEventReferenceExpression Clone(this CodeEventReferenceExpression expression)
 {
     if (expression == null) return null;
     CodeEventReferenceExpression e = new CodeEventReferenceExpression();
     e.EventName = expression.EventName;
     e.TargetObject = expression.TargetObject.Clone();
     e.UserData.AddRange(expression.UserData);
     return e;
 }

		public void Constructor1_Deny_Unrestricted ()
		{
			CodeExpression target = new CodeExpression ();
			CodeEventReferenceExpression cere = new CodeEventReferenceExpression (target, "mono");
			Assert.AreEqual ("mono", cere.EventName, "EventName");
			cere.EventName = String.Empty;
			Assert.AreSame (target, cere.TargetObject, "TargetObject");
			cere.TargetObject = new CodeExpression ();
		}

		public void Constructor1_Deny_Unrestricted ()
		{
			CodeEventReferenceExpression eventref = new CodeEventReferenceExpression ();
			CodeExpression listener = new CodeExpression ();
			CodeAttachEventStatement caes = new CodeAttachEventStatement (eventref, listener);
			Assert.AreSame (eventref, caes.Event, "Event");
			caes.Event = new CodeEventReferenceExpression ();
			Assert.AreSame (listener, caes.Listener, "Listener");
			caes.Listener = new CodeExpression ();
		}

 public override void Serialize(IDesignerSerializationManager manager, object value, MemberDescriptor descriptor, CodeStatementCollection statements)
 {
     EventDescriptor e = descriptor as EventDescriptor;
     if (manager == null)
     {
         throw new ArgumentNullException("manager");
     }
     if (value == null)
     {
         throw new ArgumentNullException("value");
     }
     if (e == null)
     {
         throw new ArgumentNullException("descriptor");
     }
     if (statements == null)
     {
         throw new ArgumentNullException("statements");
     }
     try
     {
         IEventBindingService service = (IEventBindingService) manager.GetService(typeof(IEventBindingService));
         if (service != null)
         {
             string methodName = (string) service.GetEventProperty(e).GetValue(value);
             if (methodName != null)
             {
                 CodeExpression targetObject = base.SerializeToExpression(manager, value);
                 if (targetObject != null)
                 {
                     CodeTypeReference delegateType = new CodeTypeReference(e.EventType);
                     CodeDelegateCreateExpression listener = new CodeDelegateCreateExpression(delegateType, _thisRef, methodName);
                     CodeEventReferenceExpression eventRef = new CodeEventReferenceExpression(targetObject, e.Name);
                     CodeAttachEventStatement statement = new CodeAttachEventStatement(eventRef, listener);
                     statement.UserData[typeof(Delegate)] = e.EventType;
                     statements.Add(statement);
                 }
             }
         }
     }
     catch (Exception innerException)
     {
         if (innerException is TargetInvocationException)
         {
             innerException = innerException.InnerException;
         }
         manager.ReportError(System.Design.SR.GetString("SerializerPropertyGenFailed", new object[] { e.Name, innerException.Message }));
     }
 }

		public void Constructor1 ()
		{
			CodeSnippetExpression expression = new CodeSnippetExpression("exp");

			CodeEventReferenceExpression cere = new CodeEventReferenceExpression (
				expression, "mono");
			Assert.AreEqual ("mono", cere.EventName, "#1");
			Assert.IsNotNull (cere.TargetObject, "#2");
			Assert.AreSame (expression, cere.TargetObject, "#3");

			cere.EventName = null;
			Assert.IsNotNull (cere.EventName, "#4");
			Assert.AreEqual (string.Empty, cere.EventName, "#5");

			cere.TargetObject = null;
			Assert.IsNull (cere.TargetObject, "#6");

			cere = new CodeEventReferenceExpression ((CodeExpression) null,
				(string) null);
			Assert.IsNotNull (cere.EventName, "#7");
			Assert.AreEqual (string.Empty, cere.EventName, "#8");
			Assert.IsNull (cere.TargetObject, "#9");
		}

		public void Constructor0 ()
		{
			CodeEventReferenceExpression cere = new CodeEventReferenceExpression ();
			Assert.IsNotNull (cere.EventName, "#1");
			Assert.AreEqual (string.Empty, cere.EventName, "#2");
			Assert.IsNull (cere.TargetObject, "#3");

			string eventName = "mono";
			cere.EventName = eventName;
			Assert.IsNotNull (cere.EventName, "#4");
			Assert.AreSame (eventName, cere.EventName, "#5");

			cere.EventName = null;
			Assert.IsNotNull (cere.EventName, "#6");
			Assert.AreEqual (string.Empty, cere.EventName, "#7");

			CodeExpression expression = new CodeExpression ();
			cere.TargetObject = expression;
			Assert.IsNotNull (cere.TargetObject, "#8");
			Assert.AreSame (expression, cere.TargetObject, "#9");

			cere.TargetObject = null;
			Assert.IsNull (cere.TargetObject, "#10");
		}

 private void GenerateFormalEventReferenceExpression(CodeEventReferenceExpression e)
 {
     if ((e.TargetObject != null) && !(e.TargetObject is CodeThisReferenceExpression))
     {
         base.GenerateExpression(e.TargetObject);
         base.Output.Write(".");
     }
     this.OutputIdentifier(e.EventName);
 }

		protected override void GenerateEventReferenceExpression (CodeEventReferenceExpression e)
		{
		}

        /// <summary>
        /// Adds an implementation of the INotifyPropertyChanged interface to the given type.
        /// </summary>
        /// <param name="type">The type declaration</param>
        /// <returns>Type with INotifyPropertyChanged implemented.</returns>
        protected CodeTypeDeclaration ImplementINotifyPropertyChanged(CodeTypeDeclaration type)
        {
            //// This method will implement the INotifyPropertyChanged interface 
            //// Here's an example :
            //// public class Customer :INotifyPropertyChanged {
            ////      public PropertyChangedEventHandler PropertyChanged;
            ////      public void RaisePropertyChanged(string propertyName) {
            ////          if( this.PropertyChanged !=null ) {
            ////              this.PropertyChanged (this, new PropertyChangedEventArgs( propertyName ) );
            ////          }
            ////      }
            //// }
            CodeThisReferenceExpression thisReference = new CodeThisReferenceExpression();
            CodeTypeReference notifyPropertyChanged = Code.TypeRef(typeof(INotifyPropertyChanged));

            // Add the implements INotifyPropertyChanged statement
            // public class Customer :INotifyPropertyChanged {
            type.BaseTypes.Add(notifyPropertyChanged);

            // Add the PropertyChanged event as a field to the type
            // public PropertyChangedEventHandler PropertyChanged;
            CodeMemberEvent propertyChangedEvent = type.AddEvent(Code.TypeRef(typeof(PropertyChangedEventHandler)), "PropertyChanged");
            propertyChangedEvent.ImplementationTypes.Add(notifyPropertyChanged);

            // this.PropertyChanged
            CodeEventReferenceExpression eventFieldReference = new CodeEventReferenceExpression(thisReference, "PropertyChanged");

            // Add the RaisePropertyChanged Method which will invoke the PropertyChanged handler whenever a property value changes
            // if( this.PropertyChanged !=null )
            CodeConditionStatement invokeEventHandlersIfAny = new CodeConditionStatement(new CodeBinaryOperatorExpression(eventFieldReference, CodeBinaryOperatorType.IdentityInequality, new CodePrimitiveExpression(null)));

            // this.PropertyChanged (this, new PropertyChangedEventArgs( propertyName ) );
            invokeEventHandlersIfAny.TrueStatements.Add(
                new CodeDelegateInvokeExpression(eventFieldReference, new CodeExpression[] { thisReference, new CodeObjectCreateExpression("PropertyChangedEventArgs", new CodeArgumentReferenceExpression("propertyName")) }));

            // public void RaisePropertyChanged
            CodeMemberMethod method = type.AddMethod("RaisePropertyChanged", MemberAttributes.Public);

            method.Parameters.Add(new CodeParameterDeclarationExpression("System.String", "propertyName"));

            ////      public void RaisePropertyChanged(string propertyName) {
            ////          if( this.PropertyChanged !=null ) {
            ////              this.PropertyChanged (this, new PropertyChangedEventArgs( propertyName ) );
            ////          }
            ////      }
            method.Statements.Add(invokeEventHandlersIfAny);
            return type;
        }