IIS多个应用程序共享Session

在应用程序目录下面添加一个Global.asax文件，在文件中添加以下代码：

    public override void Init()
    {
        base.Init();
        foreach (string moduleName in this.Modules)
        {
            string appName = "YourAppName";
            IHttpModule module = this.Modules[moduleName];
            SessionStateModule ssm = module as SessionStateModule;
            if (ssm != null)
            {
                System.Reflection.FieldInfo storeInfo = typeof(SessionStateModule).GetField("_store", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic);
                SessionStateStoreProviderBase store = (SessionStateStoreProviderBase)storeInfo.GetValue(ssm);
                if (store == null)//In IIS7 Integrated mode, module.Init() is called later
                {
                    System.Reflection.FieldInfo runtimeInfo = typeof(HttpRuntime).GetField("_theRuntime", System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic);
                    HttpRuntime theRuntime = (HttpRuntime)runtimeInfo.GetValue(null);
                    System.Reflection.FieldInfo appNameInfo = typeof(HttpRuntime).GetField("_appDomainAppId", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic);
                    appNameInfo.SetValue(theRuntime, appName);
                }
                else
                {
                    Type storeType = store.GetType();
                    if (storeType.Name.Equals("OutOfProcSessionStateStore"))
                    {
                        System.Reflection.FieldInfo uribaseInfo = storeType.GetField("s_uribase", System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic);
                        uribaseInfo.SetValue(storeType, appName);
                    }
                }
            }
        }
    }