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Building an MVP Framework for .NET. Part 4: Strongly Typed Associations

, 25 Apr 2008
In this article we continue developing a Model-View-Presenter framework for .NET platform. The new features we are implementing here are strongly typed asscoiations between controllers, views and tasks for higher convenience and type safety.
mvcsharp-0.7.1.zip
MVCSharp
API Docs
CleanUpAll.proj
Examples
ASP.NET MVC Store
ApplicationLogic
Model
NorthwindDataSet.xsc
NorthwindDataSet.xss
Presentation
App_Data
Nwind.mdb
Global.asax
Properties
Tests
Properties
TestApplicationLogic
Tests.csproj.user
Basics
Basics (generics used)
ApplicationLogic
Model
Presentation
Web
Global.asax
Win
Properties
Settings.settings
ApplicationLogic
Model
Presentation
Web
Global.asax
Win
Properties
Settings.settings
SimpleFormsViewsManager
Properties
TestSimpleFormsViewsManager
ApplicationLogic
Presentation
Properties
Settings.settings
TasksInteraction
ApplicationLogic
Model
Presentation
Web
Global.asax
Win
Properties
Settings.settings
WindowsFormsExample
ApplicationLogic
Presentation
Properties
Settings.settings
MVCSharp
MVCSharp.Tests
Core
Configuration
Tasks
Views
Tasks
MVCSharp.Tests.csproj.user
Properties
Webforms
Configuration
Winforms
Configuration
Core
Configuration
Tasks
Views
Tasks
Views
Properties
Webforms
Configuration
Winforms
Configuration
//===========================================
// MVC# Framework | www.MVCSharp.org        |
// ------------------------------------------
// Copyright (C) 2008 www.MVCSharp.org      |
// All rights reserved.                     |
//===========================================

using System;
using System.Text;
using MVCSharp.Core.Configuration;
using MVCSharp.Core.Configuration.Tasks;
using MVCSharp.Core.Views;

namespace MVCSharp.Core.Tasks
{
    #region Documentation
    /// <summary>
    /// TasksManager class is responsible for starting tasks. Task
    /// descriptions are obtained from the associated
    /// <see cref="TasksManager.Config">TasksManager.Config</see> object.
    /// </summary>
    #endregion
    public class TasksManager
    {
        private MVCConfiguration config;

        #region Documentation
        /// <summary>
        /// Parameterless constructor.
        /// </summary>
        #endregion
        public TasksManager() { }

        #region Documentation
        /// <summary>
        /// Creates a tasks manager and links it to the MVCConfiguration
        /// instance passed as parameter.
        /// </summary>
        #endregion
        public TasksManager(MVCConfiguration mvcConfig)
        {
            this.Config = mvcConfig;
        }

        #region Documentation
        /// <summary>
        /// Gets or sets the associated <see cref="MVCConfiguration"/> object.
        /// </summary>
        #endregion
        public MVCConfiguration Config
        {
            get { return config; }
            set { config = value; }
        }

        #region Documentation
        /// <summary>
        /// Starts a task passing null to the <see cref="ITask.OnStart"/> method.
        /// </summary>
        #endregion
        public ITask StartTask(Type taskType)
        {
            return StartTask(taskType, null);
        }

        #region Documentation
        /// <summary>
        /// Starts a task passing <c>param</c> to the <see cref="ITask.OnStart">
        /// ITask.OnStart</see> operation. Task description (<see cref="TaskInfo"/>
        /// instance) and views manager type are taken from the
        /// associated <see cref="TasksManager.Config">TasksManager.Config</see>
        /// object.</summary>
        /// <param name="taskType">The type of the task to start.</param>
        /// <param name="param">Parameter passed to the <see cref="ITask.OnStart">
        /// ITask.OnStart</see> method.</param>
        #endregion
        public ITask StartTask(Type taskType, object param)
        {
            TaskInfo ti = GetTaskInfo(taskType);
            Navigator n = new Navigator();
            IViewsManager vm = CreateHelper.Create(Config.ViewsManagerType) as IViewsManager;
            ITask t = CreateHelper.Create(taskType) as ITask;

            n.TaskInfo = ti;
            n.ViewsManager = vm;
            n.Task = t;
            vm.Navigator = n;
            vm.ViewInfos = ti.ViewInfos;
            t.TasksManager = this;
            t.Navigator = n;
            t.OnStart(param);
            return t;
        }

        private TaskInfo GetTaskInfo(Type taskType)
        {
            return Config.TaskInfos[taskType];
        }
    }
}

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About the Author

Oleg Zhukov
Team Leader
Russian Federation Russian Federation
Oleg Zhukov, born and living in Russia is Lead Engineer and Project Manager in a company which provides business software solutions. He has graduated from Moscow Institute of Physics and Technology (MIPT) (department of system programming) and has got a M.S. degree in applied physics and mathematics. His research and development work concerns architectural patterns, domain-driven development and systems analysis. Being the adherent of agile methods he applies them extensively in the projects managed by him.

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