在MVC中使用Unity

最新推荐文章于 2024-05-30 16:35:29 发布

转载最新推荐文章于 2024-05-30 16:35:29 发布 · 50 阅读

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原文链接：http://www.cnblogs.com/Teco/archive/2012/03/07/2383470.html

使用Unity，本例子，不包括使用web.config配置，直接代碼中使用。

1.建立BootStrapper類，負責處理Unity使用中的所有功能。

1.1引用 Microsoft.Practices.Unity 命名空間。

1.2創建IUnityContainer _current實體。

1.3註冊要使用的類，在本例子中，會自動註冊Controller類，利用反射技術。

代碼如下：

View Code

    public class BootStrapper
    {
private static IUnityContainer _current;

private static readonly object Locker = new object();

private  static IUnityContainer Current
        {
get
            {
if (_current == null)
                {
lock (Locker)
                    {
if (_current == null)
                        {
                            _current = new UnityContainer();
                        }
                    }
                }
return _current;
            }


        }

public static void RegisterDependency()
        {

if (_current == null)
            {
                _current = Current;
            }

#region 所有DLL路径

var dllPaths =
                Directory.GetFiles(HttpContext.Current.Server.MapPath("~/bin"), "*.dll");

#endregion

#region 所有controllers类型

var typeListController =
                dllPaths.Select(path =>
                {
try
                    {
return Assembly.LoadFrom(path);
                    }
catch (Exception ex)
                    {
return null;
                    }
                }).Where(a => a != null).Select(a =>
                {
try
                    {
return a.GetTypes();
                    }
catch (Exception ex)
                    {
return null;
                    }
                }).SelectMany(ts => ts).
                Where(t => (t.BaseType != null) && (t.BaseType.Name == "BaseController"))
                .ToList();

foreach (var item in typeListController)
            {

                _current.RegisterType(typeof(BaseController), item, item.Name);
            }

#endregion

#region 接口註冊
            _current.RegisterType<IUHDEntities, UHDEntities>(new HttpContextLifetimeManager<IUHDEntities>());

            _current.RegisterType<IChoiceServers, ChoiceServers>();

            _current.RegisterType<IFeedbackServers, FeedbackServers>();

            _current.RegisterType<IDocumentServers, DocumentServers>();

            _current.RegisterType<IAttachmentServers, AttachmentServers>();

            _current.RegisterType<ISendWorkServers, SendWorkServers>();

            _current.RegisterType<IUsersServers, UsersServers>();

            _current.RegisterType<IWorkRecordServers, WorkRecordServers>();

            _current.RegisterType<ICompanyServers, CompanyServers>();

            _current.RegisterType<IDeptServers, DeptServers>();

            _current.RegisterType<IFeedbackDetailsServers, FeedbackDetailsServers>();

            _current.RegisterType<IUpFeedbackServers, UpFeedbackServers>();
#endregion

        }

public static Controller GetSingleController(Type name)
        {
return _current.Resolve<BaseController>(name.Name);
        }

public static T GetSingleModels<T>()
        {
return _current.Resolve<T>();
        }
    }

2.建立一個生存期的類HttpContextLifetimeManager，使得Unity 能根據這個生存期處理實體。

這個生存期，表示在一個請求中，用一個實體，不需要重新初始化。

代碼如下：

View Code

  public class HttpContextLifetimeManager<T> : LifetimeManager, IDisposable
    {
public override object GetValue()
        {
return HttpContext.Current.Items[typeof(T).AssemblyQualifiedName];
        }
public override void RemoveValue()
        {
            HttpContext.Current.Items.Remove(typeof(T).AssemblyQualifiedName);
        }
public override void SetValue(object newValue)
        {
            HttpContext.Current.Items[typeof(T).AssemblyQualifiedName] = newValue;
        }
public void Dispose()
        {
            RemoveValue();
        }
    }

3.我在代碼中這樣註冊實體的生存期

如下代碼：

_current.RegisterType<IUHDEntities, UHDEntities>(new HttpContextLifetimeManager<IUHDEntities>());

註冊了一個數據庫連接的實體。也就是此數據庫實體，再一個請求中，只使用這一個。

4.為了在MVC中使用，特別聲明一個繼承DefaultControllerFactory類的實體IoCControllerFactory 。

代碼如下：

View Code

    public class IoCControllerFactory : DefaultControllerFactory
    {
protected override IController GetControllerInstance(System.Web.Routing.RequestContext requestContext, Type controllerType)
        {

if (controllerType != null)
                {
return BootStrapper.GetSingleController(controllerType);
                }
return base.GetControllerInstance(requestContext, controllerType);

        }
    }

5.在 Global.asax中的Application_Start事件中，添加如下代碼：

BootStrapper.RegisterDependency();
ControllerBuilder.Current.SetControllerFactory(new IoCControllerFactory());

6.這樣可以建立任何一個Controller，如AccountController，我在這裡Controller都繼承BaseController

BaseController繼承Controller，然後在AccountController中使用如下代碼：

View Code

public class AccountController : BaseController
    {
private readonly IUsersServers _UsersServers;
private readonly IDeptServers _DeptServers;
public AccountController(IUsersServers _UsersServers, IDeptServers _DeptServers)
        {
this._DeptServers = _DeptServers;
this._UsersServers = _UsersServers;
        }
//
// GET: /Account/

public ActionResult LogOn()
        {
if (Function.lstDept == null)
            {
                Function.lstDept = _DeptServers.GetDeptAll();
            }
return View();
        }

        [HttpPost]
public ActionResult LogOn(LogOnModel model, string returnUrl)
        {
if (ModelState.IsValid)
            {
if (_UsersServers.ValidateUser(model.UserName, model.Password))
                {
                    FormsAuthentication.SetAuthCookie(model.UserName, model.RememberMe);
if (Url.IsLocalUrl(returnUrl) && returnUrl.Length > 1 && returnUrl.StartsWith("/")
                        && !returnUrl.StartsWith("//") && !returnUrl.StartsWith("/\\"))
                    {
return Redirect(returnUrl);
                    }
else
                    {
return RedirectToAction("Index", "Feedback");
                    }
                }
else
                {
                    ModelState.AddModelError("", "The user name or password provided is incorrect.");
                }
            }

// If we got this far, something failed, redisplay form
            return View(model);
        }

//
// GET: /Account/LogOff

public ActionResult LogOff()
        {
            FormsAuthentication.SignOut();

return RedirectToAction("LogOn", "Account");
        }

        [HttpPost]
public ActionResult ChangePassword(string oldPass, string newPass, string ConfirmPassword)
        {
string Right = "0";
if (Function.User.Passwd==oldPass)
            {

// ChangePassword will throw an exception rather
// than return false in certain failure scenarios.
                bool changePasswordSucceeded;
try
                {

                    changePasswordSucceeded = _UsersServers.ChangePassword(Function.User.UserID, oldPass, newPass);
                }
catch (Exception)
                {
                    changePasswordSucceeded = false;
                }

if (changePasswordSucceeded)
                {
                    Right="1";
                }
else
                {
                    Right="0";
                }
            }

return Content(Right);
        }

    }

說明：

其中 private readonly IUsersServers _UsersServers;
private readonly IDeptServers _DeptServers;

是在Unity中註冊的接口。

只有你一訪問 AccountController類：

      public AccountController(IUsersServers _UsersServers, IDeptServers _DeptServers)
        {
            this._DeptServers = _DeptServers;
            this._UsersServers = _UsersServers;
        }

方法，會自動，通過Unity中，創建各個實體。然後你在代碼中直接使用就可以了。

转载于:https://www.cnblogs.com/Teco/archive/2012/03/07/2383470.html