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namespace System.Workflow.Activities
{
using System;
using System.Text;
using System.Reflection;
using System.Collections;
using System.CodeDom;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Drawing;
using System.Workflow.ComponentModel;
using System.Workflow.ComponentModel.Design;
using System.Workflow.ComponentModel.Serialization;
using System.Collections.Generic;
using System.Workflow.ComponentModel.Compiler;
[SRDescription(SR.CodeActivityDescription)]
[ToolboxItem(typeof(ActivityToolboxItem))]
[Designer(typeof(CodeDesigner), typeof(IDesigner))]
[ToolboxBitmap(typeof(CodeActivity), "Resources.code.png")]
[DefaultEvent("ExecuteCode")]
[SRCategory(SR.Standard)]
[ActivityValidator(typeof(CodeActivityValidator))]
[Obsolete("The System.Workflow.* types are deprecated. Instead, please use the new types from System.Activities.*")]
public sealed class CodeActivity : Activity
{
#region Constructors
public CodeActivity()
{
}
public CodeActivity(string name)
: base(name)
{
}
#endregion
public static readonly DependencyProperty ExecuteCodeEvent = DependencyProperty.Register("ExecuteCode", typeof(EventHandler), typeof(CodeActivity));
protected override sealed ActivityExecutionStatus Execute(ActivityExecutionContext executionContext)
{
base.RaiseEvent(CodeActivity.ExecuteCodeEvent, this, EventArgs.Empty);
return ActivityExecutionStatus.Closed;
}
[SRCategory(SR.Handlers)]
[SRDescription(SR.UserCodeHandlerDescr)]
[MergableProperty(false)]
public event EventHandler ExecuteCode
{
add
{
base.AddHandler(ExecuteCodeEvent, value);
}
remove
{
base.RemoveHandler(ExecuteCodeEvent, value);
}
}
private class CodeActivityValidator : ActivityValidator
{
public override ValidationErrorCollection Validate(ValidationManager manager, object obj)
{
ValidationErrorCollection errors = new ValidationErrorCollection();
CodeActivity code = obj as CodeActivity;
if (code == null)
throw new InvalidOperationException();
// This violates the P || C validation condition, but we are compiling with csc.exe here!
if (code.GetInvocationList<EventHandler>(CodeActivity.ExecuteCodeEvent).Length == 0 &&
code.GetBinding(CodeActivity.ExecuteCodeEvent) == null)
{
Hashtable hashtable = code.GetValue(WorkflowMarkupSerializer.EventsProperty) as Hashtable;
if (hashtable == null || hashtable["ExecuteCode"] == null)
errors.Add(ValidationError.GetNotSetValidationError("ExecuteCode"));
}
errors.AddRange(base.Validate(manager, obj));
return errors;
}
}
}
}
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