有沒有人有任何如何使Unity 1.2或2.0與ASP.NET WebForms一起工作的好例子?統一和ASP.NET WebForms - 沒有爲此對象定義的無參數構造函數
我以爲我有這個想法,但顯然我錯過了一些東西。現在我收到了錯誤; 「沒有爲此對象定義無參數的構造函數」。我記得幾年前發生這個錯誤,我只是不記得我做了什麼。
很顯然,Unity並不像它應該那樣工作,因爲在某些地方我已經忘記了一些東西。任何幫助,將不勝感激。
下面是我的一些代碼:
的Global.asax
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Security; using System.Web.SessionState; using Microsoft.Practices.Unity; using PIA35.Unity; namespace PIA35.Web { public class Global : System.Web.HttpApplication { protected void Application_Start(object sender, EventArgs e) { IUnityContainer container = Application.GetContainer(); PIA35.Web.IoC.Bootstrapper.Configure(container); } } }
這裏是我的HttpModules web.config文件的部分:
<httpModules> <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add name="UnityHttpModule" type="PIA35.Unity.UnityHttpModule, PIA35.Unity"/> </httpModules>
下面是我的IoC的引導程序類的代碼。
using System; using System.Collections.Generic; using System.Linq; using System.Web; using Microsoft.Practices.Unity; using PIA35.Services.Interfaces; using PIA35.Services; using PIA35.DataObjects.Interfaces; using PIA35.DataObjects.SqlServer; namespace PIA35.Web.IoC { public static class Bootstrapper { public static void Configure(IUnityContainer container) { container .RegisterType<ICategoryService, CategoryService>() .RegisterType<ICustomerService, CustomerService>() .RegisterType<IOrderService, OrderService>() .RegisterType<IOrderDetailService, OrderDetailService>() .RegisterType<IProductService, ProductService>() .RegisterType<ICategoryDao, SqlServerCategoryDao>() .RegisterType<ICustomerDao, SqlServerCustomerDao>() .RegisterType<IOrderDao, SqlServerOrderDao>() .RegisterType<IOrderDetailDao, SqlServerOrderDetailDao>() .RegisterType<IProductDao, SqlServerProductDao>(); } } }
這裏是HttpApplicationStateExtensions.cs文件。
using System.Web; using Microsoft.Practices.Unity; namespace PIA35.Unity { public static class HttpApplicationStateExtensions { private const string GlobalContainerKey = "GlobalUnityContainerKey"; public static IUnityContainer GetContainer(this HttpApplicationState application) { application.Lock(); try { IUnityContainer container = application[GlobalContainerKey] as IUnityContainer; if (container == null) { container = new UnityContainer(); application[GlobalContainerKey] = container; } return container; } finally { application.UnLock(); } } } }
這是我的UnityHttpModule.cs文件。
using System; using System.Collections.Generic; using System.Web; using System.Web.UI; using Microsoft.Practices.Unity; namespace PIA35.Unity { public class UnityHttpModule : IHttpModule { #region IHttpModule Members /// ///Initializes a module and prepares it to handle requests. /// /// ///An ///that provides access to the methods, properties, ///and events common to all application objects within an ASP.NET application public void Init(HttpApplication context) { context.PreRequestHandlerExecute += OnPreRequestHandlerExecute; } /// ///Disposes of the resources (other than memory) ///used by the module that implements . /// /// public void Dispose() { } #endregion private void OnPreRequestHandlerExecute(object sender, EventArgs e) { IHttpHandler handler = HttpContext.Current.Handler; HttpContext.Current.Application.GetContainer().BuildUp(handler.GetType(), handler); // User Controls are ready to be built up after the page initialization is complete Page page = HttpContext.Current.Handler as Page; if (page != null) { page.InitComplete += OnPageInitComplete; } } // Get the controls in the page's control tree excluding the page itself private IEnumerable GetControlTree(Control root) { foreach (Control child in root.Controls) { yield return child; foreach (Control c in GetControlTree(child)) { yield return c; } } } // Build up each control in the page's control tree private void OnPageInitComplete(object sender, EventArgs e) { Page page = (Page)sender; IUnityContainer container = HttpContext.Current.Application.GetContainer(); foreach (Control c in GetControlTree(page)) { container.BuildUp(c.GetType(), c); } } } }
下面是我的一個服務類的示例。
namespace PIA35.Services { public class CategoryService : ICategoryService { #region Dependency Injection private ICategoryDao categoryDao; public CategoryService(ICategoryDao CategoryDao) { this.categoryDao = CategoryDao; } #endregion #region ICategoryService Members public List GetAll() { return categoryDao.GetAll().ToList(); } public Category GetById(int CategoryId) { return categoryDao.GetById(CategoryId); } public void Add(Category model) { categoryDao.Insert(model); } public void Update(Category model) { categoryDao.Update(model); } public void Delete(Category model) { categoryDao.Delete(model); } #endregion } }
好的,我發現這實際上有效。我只是用錯了。我試圖將GridView綁定到指向CategoryService類的ObjectDataSource。它似乎不像ObjectDataSource控件可以接口。所以我需要在代碼中做到這一點。好吧。 – Kahanu 2010-09-07 23:38:04