控制器“TestController”的单个实例;不能用于处理多个请求
我对统一的生命周期管理器有一些问题,它像单例一样使用对象,但在配置中我将其设置为“PerWebRequest”。
错误是: 控制器“TestController”的单个实例不能用于处理多个请求。如果正在使用自定义控制器工厂,请确保它为每个请求创建一个新的控制器实例。
PerWebRequest 代码:
public class UnityPerWebRequestLifetimeManager : LifetimeManager
{
private HttpContextBase _httpContext;
public UnityPerWebRequestLifetimeManager()
: this(new HttpContextWrapper(HttpContext.Current))
{
}
public UnityPerWebRequestLifetimeManager(HttpContextBase httpContext)
{
_httpContext = httpContext;
}
private IDictionary<UnityPerWebRequestLifetimeManager, object> BackingStore
{
get
{
_httpContext = (HttpContext.Current != null) ? new HttpContextWrapper(HttpContext.Current) : _httpContext;
return UnityPerWebRequestLifetimeModule.GetInstances(_httpContext);
}
}
private object Value
{
[DebuggerStepThrough]
get
{
IDictionary<UnityPerWebRequestLifetimeManager, object> backingStore = BackingStore;
return backingStore.ContainsKey(this) ? backingStore[this] : null;
}
[DebuggerStepThrough]
set
{
IDictionary<UnityPerWebRequestLifetimeManager, object> backingStore = BackingStore;
if (backingStore.ContainsKey(this))
{
object oldValue = backingStore[this];
if (!ReferenceEquals(value, oldValue))
{
IDisposable disposable = oldValue as IDisposable;
if (disposable != null)
{
disposable.Dispose();
}
if (value == null)
{
backingStore.Remove(this);
}
else
{
backingStore[this] = value;
}
}
}
else
{
if (value != null)
{
backingStore.Add(this, value);
}
}
}
}
[DebuggerStepThrough]
public override object GetValue()
{
return Value;
}
[DebuggerStepThrough]
public override void SetValue(object newValue)
{
Value = newValue;
}
[DebuggerStepThrough]
public override void RemoveValue()
{
Value = null;
}
}
控制器:
public class TestController : Controller
{
//
// GET: /Test/
public TestController()
{
}
public ActionResult Index()
{
return View();
}
public ActionResult RadioButtonList()
{
return View("TestControl");
}
}
控制器工厂:
public class ControllerFactory : DefaultControllerFactory
{
protected override IController GetControllerInstance(System.Web.Routing.RequestContext requestContext, Type controllerType)
{
return (controllerType == null) ? base.GetControllerInstance(requestContext, controllerType) : IoC.Resolve<IController>(controllerType);
}
}
我尝试像这样使用它:
……
<% Html.RenderAction<TestController>(c => c.RadioButtonList()); %>
<% Html.RenderAction<TestController>(c => c.RadioButtonList()); %>
在其中一个视图中,
我不知道这里出了什么问题?
谢谢。
I have Some issues with the life time manager in unity, it uses the object like its singleton, but in the configuration I set it to "PerWebRequest".
The Error is:
A single instance of controller 'TestController' cannot be used to handle multiple requests. If a custom controller factory is in use, make sure that it creates a new instance of the controller for each request.
The PerWebRequest code:
public class UnityPerWebRequestLifetimeManager : LifetimeManager
{
private HttpContextBase _httpContext;
public UnityPerWebRequestLifetimeManager()
: this(new HttpContextWrapper(HttpContext.Current))
{
}
public UnityPerWebRequestLifetimeManager(HttpContextBase httpContext)
{
_httpContext = httpContext;
}
private IDictionary<UnityPerWebRequestLifetimeManager, object> BackingStore
{
get
{
_httpContext = (HttpContext.Current != null) ? new HttpContextWrapper(HttpContext.Current) : _httpContext;
return UnityPerWebRequestLifetimeModule.GetInstances(_httpContext);
}
}
private object Value
{
[DebuggerStepThrough]
get
{
IDictionary<UnityPerWebRequestLifetimeManager, object> backingStore = BackingStore;
return backingStore.ContainsKey(this) ? backingStore[this] : null;
}
[DebuggerStepThrough]
set
{
IDictionary<UnityPerWebRequestLifetimeManager, object> backingStore = BackingStore;
if (backingStore.ContainsKey(this))
{
object oldValue = backingStore[this];
if (!ReferenceEquals(value, oldValue))
{
IDisposable disposable = oldValue as IDisposable;
if (disposable != null)
{
disposable.Dispose();
}
if (value == null)
{
backingStore.Remove(this);
}
else
{
backingStore[this] = value;
}
}
}
else
{
if (value != null)
{
backingStore.Add(this, value);
}
}
}
}
[DebuggerStepThrough]
public override object GetValue()
{
return Value;
}
[DebuggerStepThrough]
public override void SetValue(object newValue)
{
Value = newValue;
}
[DebuggerStepThrough]
public override void RemoveValue()
{
Value = null;
}
}
The controller:
public class TestController : Controller
{
//
// GET: /Test/
public TestController()
{
}
public ActionResult Index()
{
return View();
}
public ActionResult RadioButtonList()
{
return View("TestControl");
}
}
The Controller Factory:
public class ControllerFactory : DefaultControllerFactory
{
protected override IController GetControllerInstance(System.Web.Routing.RequestContext requestContext, Type controllerType)
{
return (controllerType == null) ? base.GetControllerInstance(requestContext, controllerType) : IoC.Resolve<IController>(controllerType);
}
}
And in one of the views I am trying to use it like this:
...
<% Html.RenderAction<TestController>(c => c.RadioButtonList()); %>
<% Html.RenderAction<TestController>(c => c.RadioButtonList()); %>
...
I don't know what wrong here?
Thanks.
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两个统一控制器请求都是在同一个 HTTP 请求/回复中创建的,因此您获得相同的实例。您需要进行切换,以便控制器具有瞬态生命周期。
我会切换到 DependencyResolver 而不是使用 ControllerFactory,因为您正在运行 MVC3。
Both unity controller requests are created within the same HTTP request/reply, hence you get the same instance. You need to switch so that the controllers have a Transient lifetime.
I would switch to
DependencyResolver
instead of usingControllerFactory
since you are running MVC3.