CancellationHandler.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WF / Common / AuthoringOM / Behaviors / CancellationHandler.cs / 1305376 / CancellationHandler.cs

                            namespace System.Workflow.ComponentModel 
{
    using System;
    using System.Drawing;
    using System.ComponentModel; 
    using System.Collections;
    using System.ComponentModel.Design; 
    using System.Workflow.ComponentModel.Design; 
    using System.Workflow.ComponentModel.Compiler;
 

    [ToolboxItem(false)]
    [Designer(typeof(CancellationHandlerActivityDesigner), typeof(IDesigner))]
    [ToolboxBitmap(typeof(CancellationHandlerActivity), "Resources.CancellationHandler.bmp")] 
    [ActivityValidator(typeof(CancellationHandlerValidator))]
    [AlternateFlowActivity] 
    public sealed class CancellationHandlerActivity : CompositeActivity, IActivityEventListener 
    {
        public CancellationHandlerActivity() 
        {
        }

 		public CancellationHandlerActivity(string name) 
			:base(name)
		{ 
		} 

        protected internal override void Initialize(IServiceProvider provider) 
        {
            if (this.Parent == null)
                throw new InvalidOperationException(SR.GetString(SR.Error_MustHaveParent));
 
            base.Initialize(provider);
        } 
 
        protected internal override ActivityExecutionStatus Execute(ActivityExecutionContext executionContext)
        { 
            return SequenceHelper.Execute(this, executionContext);
        }

        protected internal override ActivityExecutionStatus Cancel(ActivityExecutionContext executionContext) 
        {
            return SequenceHelper.Cancel(this, executionContext); 
        } 

        void IActivityEventListener.OnEvent(Object sender, ActivityExecutionStatusChangedEventArgs e) 
        {
            SequenceHelper.OnEvent(this, sender, e);
        }
 
        protected internal override void OnActivityChangeRemove(ActivityExecutionContext executionContext, Activity removedActivity)
        { 
            SequenceHelper.OnActivityChangeRemove(this, executionContext, removedActivity); 
        }
 
        protected internal override void OnWorkflowChangesCompleted(ActivityExecutionContext executionContext)
        {
            SequenceHelper.OnWorkflowChangesCompleted(this, executionContext);
        } 
    }
 
    internal sealed class CancellationHandlerValidator : CompositeActivityValidator 
    {
        public override ValidationErrorCollection Validate(ValidationManager manager, object obj) 
        {
            ValidationErrorCollection validationErrors = base.Validate(manager, obj);

            CancellationHandlerActivity cancellationHandlerActivity = obj as CancellationHandlerActivity; 
            if (cancellationHandlerActivity == null)
                throw new ArgumentException(SR.GetString(SR.Error_UnexpectedArgumentType, typeof(CancellationHandlerActivity).FullName), "obj"); 
 
            if (cancellationHandlerActivity.EnabledActivities.Count == 0)
                validationErrors.Add(new ValidationError(SR.GetString(SR.Warning_EmptyBehaviourActivity, typeof(CancellationHandlerActivity).FullName, cancellationHandlerActivity.QualifiedName), ErrorNumbers.Warning_EmptyBehaviourActivity, true)); 

            // cancellation handlers can not contain fault handlers, compensation handler and cancellation handler
            if (((ISupportAlternateFlow)cancellationHandlerActivity).AlternateFlowActivities.Count > 0)
                validationErrors.Add(new ValidationError(SR.GetString(SR.Error_ModelingConstructsCanNotContainModelingConstructs), ErrorNumbers.Error_ModelingConstructsCanNotContainModelingConstructs)); 

            return validationErrors; 
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
                        

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