使用ASP.NET MVC引擎開(kāi)發(fā)插件系統(tǒng)

 <runtime>
 <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
 <probing privatePath="Plugins/temp/" />
 </assemblyBinding>
 </runtime>

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using System.Web.Compilation;
using System.Web.Hosting;
[assembly: PreApplicationStartMethod(typeof(Plugins.Core.PreApplicationInit), "Initialize")]
namespace Plugins.Core
{
 public class PreApplicationInit
 {

 static PreApplicationInit()
 {
 PluginFolder = new DirectoryInfo(HostingEnvironment.MapPath("~/plugins"));
 ShadowCopyFolder = new DirectoryInfo(HostingEnvironment.MapPath("~/plugins/temp"));
 }

 /// <summary>
 /// 插件所在目錄信息
 /// </summary>
 private static readonly DirectoryInfo PluginFolder;

 /// <summary>
 /// 程序應(yīng)行時(shí)指定的dll目錄
 /// </summary>
 private static readonly DirectoryInfo ShadowCopyFolder;

 public static void Initialize()
 {
 Directory.CreateDirectory(ShadowCopyFolder.FullName);
 //清空插件dll運(yùn)行目錄中的文件
 foreach (var f in ShadowCopyFolder.GetFiles("*.dll", SearchOption.AllDirectories))
 {
 f.Delete();
 }
 foreach (var plug in PluginFolder.GetFiles("*.dll", SearchOption.AllDirectories).Where(i=>i.Directory.Parent.Name== "plugins"))
 {
 File.Copy(plug.FullName, Path.Combine(ShadowCopyFolder.FullName, plug.Name), true);
 }
 foreach (var a in
 ShadowCopyFolder
 .GetFiles("*.dll", SearchOption.AllDirectories)
 .Select(x => AssemblyName.GetAssemblyName(x.FullName))
 .Select(x => Assembly.Load(x.FullName)))
 {
 BuildManager.AddReferencedAssembly(a);
 }

 }
 }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Web;
using System.Web.Mvc;
using System.Web.WebPages.Razor;

namespace Plugins.Web
{
 public class CustomerViewEngine : RazorViewEngine
 {

 /// <summary>
 /// 定義視圖頁(yè)所在地址。
 /// </summary>
 private string[] _viewLocationFormats = new[]
 {
 "~/Views/Parts/{0}.cshtml",
 "~/Plugins/{pluginFolder}/Views/{1}/{0}.cshtml",
 "~/Plugins/{pluginFolder}/Views/Shared/{0}.cshtml",
 "~/Views/{1}/{0}.cshtml",
 "~/Views/Shared/{0}.cshtml",
 };
 public override ViewEngineResult FindView(ControllerContext controllerContext, string viewName, string masterName, bool useCache)
 {
 string ns = controllerContext.Controller.GetType().Namespace;
 string controller = controllerContext.Controller.GetType().Name.Replace("Controller", "");
 //說(shuō)明是插件中的控制器，View目錄需要單獨(dú)處理
 if (ns.ToLower().Contains("plugins"))
 {
 var pluginsFolder = ns.ToLower().Replace(".controllers", "");
 ViewLocationFormats = ReplacePlaceholder(pluginsFolder);
 }
 return base.FindView(controllerContext, viewName, masterName, useCache);
 }
 /// <summary>
 /// 替換pluginFolder占位符
 /// </summary>
 /// <param name="folderName"></param>
 private string[] ReplacePlaceholder(string folderName)
 {
 string[] tempArray = new string[_viewLocationFormats.Length];
 if (_viewLocationFormats != null)
 {
 for (int i = 0; i < _viewLocationFormats.Length; i++)
 {
 tempArray[i] = _viewLocationFormats[i].Replace("{pluginFolder}", folderName);
 }
 }
 return tempArray;
 }
 }
}