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using System;
using System.Collections.Generic;
namespace Visitor
{
static class Program
{
static void Main()
{
var objectStructure = new ObjectStructure();
objectStructure.Attach(new ConcreteElementA());
objectStructure.Attach(new ConcreteElementB());
objectStructure.Accept(new ConcreteVisitorA());
objectStructure.Accept(new ConcreteVisitorB());
}
}
public abstract class ElementBase
{
public abstract void Accept(VisitorBase visitor);
}
public abstract class VisitorBase
{
public abstract void Visit(ConcreteElementA element);
public abstract void Visit(ConcreteElementB element);
}
public class ObjectStructure
{
private List<ElementBase> _elements;
public ObjectStructure()
{
_elements = new List<ElementBase>();
}
public void Accept(VisitorBase visitor)
{
foreach (ElementBase element in _elements)
{
element.Accept(visitor);
}
}
public void Attach(ElementBase element)
{
_elements.Add(element);
}
public void Detach(ElementBase element)
{
_elements.Remove(element);
}
}
public class ConcreteElementA : ElementBase
{
public override void Accept(VisitorBase visitor)
{
visitor.Visit(this);
}
public string Name { get; set; }
}
public class ConcreteElementB : ElementBase
{
public override void Accept(VisitorBase visitor)
{
visitor.Visit(this);
}
public string Title { get; private set; }
}
public class ConcreteVisitorA : VisitorBase
{
public override void Visit(ConcreteElementA element)
{
Console.WriteLine("VisitorA visited ElementA : {0}", element.Name);
}
public override void Visit(ConcreteElementB element)
{
Console.WriteLine("VisitorA visited ElementB : {0}", element.Title);
}
}
public class ConcreteVisitorB : VisitorBase
{
public override void Visit(ConcreteElementA element)
{
Console.WriteLine("VisitorB visited ElementA : {0}", element.Name);
}
public override void Visit(ConcreteElementB element)
{
Console.WriteLine("VisitorB visited ElementB : {0}", element.Title);
}
}
}
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My name is Robert Kanasz and I have been working with ASP.NET, WinForms and C# for several years.
MCSD - Web Applications
MCSE - Data Platform
MCPD - ASP.NET Developer 3.5
- Web Developer 4
MCITP - Database Administrator 2008
- Database Developer 2008
MCSA - SQL Server 2012
MCTS - .NET Framework 3.5, ASP.NET Applications
- SQL Server 2008, Database Development
- SQL Server 2008, Implementation and Maintenance
- .NET Framework 4, Data Access
- .NET Framework 4, Service Communication Applications
- .NET Framework 4, Web Applications
MS - Programming in HTML5 with JavaScript and CSS3 Specialist
Open source projects:
DBScripter - Library for scripting SQL Server database objects
Please, do not forget vote