WebAPI控制器分离

待我称王封你为后i 2022-06-15 05:43 106阅读 0赞

默认情况下webapi从当前应用程序域加载控制器，我们可以通过继承DefaultAssembliesResolver类来从新配置入口

需要从写GetAssemblies方法，我们把控制器单独拎出到一个类库中，然后编译控制器所在的类库，并将相关的依赖dll（系统dll除外）拿出来，然后

装载这些dll

/// <summary>
        /// 装载控制器
        /// </summary>
        internal class ControllerResolver : DefaultAssembliesResolver
        {
            public override ICollection<Assembly> GetAssemblies()
            {
                var apiController = LoadController();
                return apiController;
            }
    
            private ICollection<Assembly> LoadController()
            {
                // return AppDomain.CurrentDomain.GetAssemblies().ToList<Assembly>();
                const string apiPath = "webapi"; //应用程序根目录下的webapi文件夹中存放api文件  
                const string ctlfile = ".dll";   //加载的pai文件的扩展名须是dll
    
                ICollection<Assembly> baseAssemblies = base.GetAssemblies();
                var apipath = AppDomain.CurrentDomain.BaseDirectory + string.Format("\\{0}\\", apiPath);
                if (Directory.Exists(apipath))
                {
                    var apifiles = Directory.GetFiles(apipath, "*" + ctlfile)
                                    .Where(t => t.ToLower().EndsWith(ctlfile)) //过滤  
                                    .ToList();
                    foreach (var apidll in apifiles)
                    {
                        baseAssemblies.Add(Assembly.LoadFrom(apidll));
                    }
                }
                return baseAssemblies;
            }
        }

具体的描述注解中有说明，主要是把dll放到app的根目录下的webapi文件夹中，然后加载进去。详细点的可以看大神的文章：

[http://www.cnblogs.com/artech/p/custom-assembly-resolver.html][http_www.cnblogs.com_artech_p_custom-assembly-resolver.html]

注意，依赖的dll需要一并放入，不然控制器的初始化会失败

//另一种方式处理：

AppDomain.CurrentDomain.AssemblyResolve += delegate(object sender, ResolveEventArgs senderArgs)
                {
                    Assembly executingAssembly = Assembly.GetExecutingAssembly();
                    //string name = new AssemblyName(executingAssembly.FullName).Name;
                    string str2 = new AssemblyName(senderArgs.Name).Name;
                    string str3 = str2 + ".dll";
                    using (Stream stream = executingAssembly.GetManifestResourceStream(str3))
                    {
                        byte[] buffer = new byte[stream.Length];
                        stream.Read(buffer, 0, buffer.Length);
                        return Assembly.Load(buffer);
                    }
                };

==========================================分割线【改进】=============================================

private ICollection<Assembly> LoadController()
            {
                const string apiPath = "webapi"; //应用程序根目录下的webapi文件夹中存放api文件  
                const string ctlfile = ".dll";   //加载的pai文件的扩展名须是dll
    
                //AppDomain.Unload(...)
                //AppDomain.CurrentDomain.GetAssemblies()
                ICollection<Assembly> baseAssemblies = base.GetAssemblies();
    
                var apipath = AppDomain.CurrentDomain.BaseDirectory + string.Format("{0}\\", apiPath);
                if (Directory.Exists(apipath))
                {
                    var apifiles = Directory.GetFiles(apipath, "*" + ctlfile)
                                    .Where(t => t.ToLower().EndsWith(ctlfile))
                                    .ToList();
                    foreach (var apidll in apifiles)
                    {
                        var tempAsm = Assembly.LoadFrom(apidll); //注意此处会有异常
                        if (baseAssemblies.Any(x => x.FullName == tempAsm.FullName))
                        {
                            Console.WriteLine(tempAsm.FullName + " 程序集已加载");
                            continue;
                        }
    
                        baseAssemblies.Add(tempAsm);
                    }
                }
    
                return baseAssemblies;
            }

[http_www.cnblogs.com_artech_p_custom-assembly-resolver.html]: http://www.cnblogs.com/artech/p/custom-assembly-resolver.html