系列目录
很多人问我如何用配置文件来配置注入,本节演示如何利用配置文件来注入,道理是一样的,跳转到上一节下载源码一起来动手!
1.打开源码定位到文件DependencyRegisterType.cs
红框部分是必须的,接口和实现的命名空间,程序集,类,所以我们的配置文件也需要拥有以上属性
2.在Apps.Web新建一个XML文件
并添加以下代码:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<section name="unity" type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection, Microsoft.Practices.Unity.Configuration"/>
</configSections>
<unity>
<alias alias="" type="" />
<namespace name="Apps.IBLL" />
<namespace name="Apps.BLL" />
<namespace name="Apps.IDAL" />
<namespace name="Apps.DAL" /> <assembly name="Apps.IBLL" />
<assembly name="Apps.BLL" />
<assembly name="Apps.IDAL" />
<assembly name="Apps.DAL" /> <container> <register type="ISysPersonBLL" mapTo="SysPersonBLL" />
<register type="ISysPersonRepository" mapTo="SysPersonRepository" />
</container>
</unity>
</configuration>
其实alias节点啥都不写也是没有关系的,只是作为一个别名使用,我们下面全是使用真实名称
好了,准备调用!
3.修改原来Apps.Core下的UnityConfig.cs为
using Microsoft.Practices.Unity;
using Microsoft.Practices.Unity.Configuration;
using System.Configuration;
using System.Web;
using System.Web.Http;
using System.Web.Mvc;
using Unity.WebApi; namespace Apps.Core
{
public static class UnityConfig
{
public static void RegisterComponents()
{
var container = BuildUnityContainer(); DependencyResolver.SetResolver(new UnityDependencyResolver(container));
GlobalConfiguration.Configuration.DependencyResolver = new Unity.WebApi.UnityDependencyResolver(container);
}
/// <summary>
/// Builds the unity container.
/// </summary>
/// <returns></returns>
private static IUnityContainer BuildUnityContainer()
{
var container = new UnityContainer();
var fileMap = new ExeConfigurationFileMap { ExeConfigFilename = HttpContext.Current.Server.MapPath("~/Unity.Config") };
Configuration configuration =
ConfigurationManager.OpenMappedExeConfiguration(fileMap, ConfigurationUserLevel.None);
var unitySection = (UnityConfigurationSection)configuration.GetSection("unity");
container.LoadConfiguration(unitySection);
return container;
}
}
}
4.最后在Web网站Apps.Web的Global添加调用代码
UnityConfig.RegisterComponents();
5.运行代码
控制器代码:
public class Default1Controller : BaseController
{
[Dependency]
public ISysPersonBLL m_BLL { get; set; }
public ActionResult Index()
{
ViewBag.Value = m_BLL.GetValue();
return View();
}
}
业务层代码:
public class SysPersonBLL:ISysPersonBLL
{
[Dependency]
public ISysPersonRepository m_Rep { get; set; }
public string GetValue()
{
return m_Rep.GetValue();
}
}
数据访问层代码:
public partial class SysPersonRepository
{
public string GetValue()
{
return "直接到DAL";
}
}
最后界面展示:
总结:
正确利用注入方式获得了数据,其实配置形式,更加麻烦,每个站点都要存在一个XML文件。而且配置容易出错,出现虽然有提示,但是如果一旦数量太多,容易出错!
代码下载:http://yunpan.cn/c6XDwfaCY9sff 访问密码 8d0e