以前在aspnet中一直是Response.End();
在这之后的当前请求应有的代码都不会执行了,
但是在aspnetmvc中，就算调用Response.End();还是会执行!
如果你在action中的逻辑需要中断，你可以变通的通过逻辑判断来中断，
比如
if(ok)
{
//应有的逻辑
}
else
{
//中断
}
//或者
if(!ok)
return Content("NO");
但是如果是在过滤器中
protected virtual void OnActionExecuted(ActionExecutedContext filterContext);
protected virtual void OnActionExecuting(ActionExecutingContext filterContext);
protected virtual void OnAuthorization(AuthorizationContext filterContext);
protected virtual void OnException(ExceptionContext filterContext);
protected virtual void OnResultExecuted(ResultExecutedContext filterContext);
protected virtual void OnResultExecuting(ResultExecutingContext filterContext);
你return or Response.End(); 是无效的！
教你正确的aspnetmvc Cancel姿势：
那就是赋值 filterContext.Result！
例如OnActionExecuting
protected override void OnActionExecuting(ActionExecutingContext filterContext)
{
var headerAuth = filterContext.HttpContext.Request.Headers["_applogin_"];
if (string.IsNullOrEmpty(headerAuth))
{
filterContext.Result = new ContentResult()
{
Content = "{code:9999,message:‘no login‘}",
ContentEncoding = Encoding.UTF8
};
}
base.OnActionExecuting(filterContext);
}
}
为什么赋值了Context.Result就不会继续执行action的逻辑呢？
aspnetmvc源码：ControllerActionInvoker.cs
using Microsoft.Web.Infrastructure.DynamicValidationHelper;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Threading;
using System.Web.Mvc.Properties;
namespace System.Web.Mvc
{
public class ControllerActionInvoker : IActionInvoker
{
private static readonly ControllerDescriptorCache _staticDescriptorCache = new ControllerDescriptorCache();
private ModelBinderDictionary _binders;
private Func<ControllerContext, ActionDescriptor, IEnumerable<Filter>> _getFiltersThunk = new Func<ControllerContext, ActionDescriptor, IEnumerable<Filter>>(FilterProviders.Providers.GetFilters);
private ControllerDescriptorCache _instanceDescriptorCache;
protected internal ModelBinderDictionary Binders
{
get
{
if (this._binders == null)
{
this._binders = ModelBinders.Binders;
}
return this._binders;
}
set
{
this._binders = value;
}
}
internal ControllerDescriptorCache DescriptorCache
{
get
{
if (this._instanceDescriptorCache == null)
{
this._instanceDescriptorCache = ControllerActionInvoker._staticDescriptorCache;
}
return this._instanceDescriptorCache;
}
set
{
this._instanceDescriptorCache = value;
}
}
public ControllerActionInvoker()
{
}
internal ControllerActionInvoker(params object[] filters) : this()
{
if (filters != null)
{
this._getFiltersThunk = ((ControllerContext cc, ActionDescriptor ad) =>
from f in filters
select new Filter(f, FilterScope.Action, null));
}
}
protected virtual ActionResult CreateActionResult(ControllerContext controllerContext, ActionDescriptor actionDescriptor, object actionReturnValue)
{
if (actionReturnValue == null)
{
return new EmptyResult();
}
ActionResult arg_2B_0;
if ((arg_2B_0 = (actionReturnValue as ActionResult)) == null)
{
arg_2B_0 = new ContentResult
{
Content = Convert.ToString(actionReturnValue, CultureInfo.InvariantCulture)
};
}
return arg_2B_0;
}
protected virtual ControllerDescriptor GetControllerDescriptor(ControllerContext controllerContext)
{
Type controllerType = controllerContext.Controller.GetType();
return this.DescriptorCache.GetDescriptor(controllerType, () => new ReflectedControllerDescriptor(controllerType));
}
protected virtual ActionDescriptor FindAction(ControllerContext controllerContext, ControllerDescriptor controllerDescriptor, string actionName)
{
return controllerDescriptor.FindAction(controllerContext, actionName);
}
protected virtual FilterInfo GetFilters(ControllerContext controllerContext, ActionDescriptor actionDescriptor)
{
return new FilterInfo(this._getFiltersThunk(controllerContext, actionDescriptor));
}
private IModelBinder GetModelBinder(ParameterDescriptor parameterDescriptor)
{
return parameterDescriptor.BindingInfo.Binder ?? this.Binders.GetBinder(parameterDescriptor.ParameterType);
}
protected virtual object GetParameterValue(ControllerContext controllerContext, ParameterDescriptor parameterDescriptor)
{
Type parameterType = parameterDescriptor.ParameterType;
IModelBinder modelBinder = this.GetModelBinder(parameterDescriptor);
IValueProvider valueProvider = controllerContext.Controller.ValueProvider;
string modelName = parameterDescriptor.BindingInfo.Prefix ?? parameterDescriptor.ParameterName;
Predicate<string> propertyFilter = ControllerActionInvoker.GetPropertyFilter(parameterDescriptor);
ModelBindingContext bindingContext = new ModelBindingContext
{
FallbackToEmptyPrefix = parameterDescriptor.BindingInfo.Prefix == null,
ModelMetadata = ModelMetadataProviders.Current.GetMetadataForType(null, parameterType),
ModelName = modelName,
ModelState = controllerContext.Controller.ViewData.ModelState,
PropertyFilter = propertyFilter,
ValueProvider = valueProvider
};
object obj = modelBinder.BindModel(controllerContext, bindingContext);
return obj ?? parameterDescriptor.DefaultValue;
}
protected virtual IDictionary<string, object> GetParameterValues(ControllerContext controllerContext, ActionDescriptor actionDescriptor)
{
Dictionary<string, object> dictionary = new Dictionary<string, object>(StringComparer.OrdinalIgnoreCase);
ParameterDescriptor[] parameters = actionDescriptor.GetParameters();
ParameterDescriptor[] array = parameters;
for (int i = 0; i < array.Length; i++)
{
ParameterDescriptor parameterDescriptor = array[i];
dictionary[parameterDescriptor.ParameterName] = this.GetParameterValue(controllerContext, parameterDescriptor);
}
return dictionary;
}
private static Predicate<string> GetPropertyFilter(ParameterDescriptor parameterDescriptor)
{
ParameterBindingInfo bindingInfo = parameterDescriptor.BindingInfo;
return (string propertyName) => BindAttribute.IsPropertyAllowed(propertyName, bindingInfo.Include.ToArray<string>(), bindingInfo.Exclude.ToArray<string>());
}
public virtual bool InvokeAction(ControllerContext controllerContext, string actionName)
{
if (controllerContext == null)
{
throw new ArgumentNullException("controllerContext");
}
if (string.IsNullOrEmpty(actionName))
{
throw new ArgumentException(MvcResources.Common_NullOrEmpty, "actionName");
}
ControllerDescriptor controllerDescriptor = this.GetControllerDescriptor(controllerContext);
ActionDescriptor actionDescriptor = this.FindAction(controllerContext, controllerDescriptor, actionName);
if (actionDescriptor != null)
{
FilterInfo filters = this.GetFilters(controllerContext, actionDescriptor);
try
{
AuthorizationContext authorizationContext = this.InvokeAuthorizationFilters(controllerContext, filters.AuthorizationFilters, actionDescriptor);
if (authorizationContext.Result != null)
{
this.InvokeActionResult(controllerContext, authorizationContext.Result);
}
else
{
if (controllerContext.Controller.ValidateRequest)
{
ControllerActionInvoker.ValidateRequest(controllerContext);
}
IDictionary<string, object> parameterValues = this.GetParameterValues(controllerContext, actionDescriptor);
ActionExecutedContext actionExecutedContext = this.InvokeActionMethodWithFilters(controllerContext, filters.ActionFilters, actionDescriptor, parameterValues);
this.InvokeActionResultWithFilters(controllerContext, filters.ResultFilters, actionExecutedContext.Result);
}
}
catch (ThreadAbortException)
{
throw;
}
catch (Exception exception)
{
ExceptionContext exceptionContext = this.InvokeExceptionFilters(controllerContext, filters.ExceptionFilters, exception);
if (!exceptionContext.ExceptionHandled)
{
throw;
}
this.InvokeActionResult(controllerContext, exceptionContext.Result);
}
return true;
}
return false;
}
protected virtual ActionResult InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary<string, object> parameters)
{
object actionReturnValue = actionDescriptor.Execute(controllerContext, parameters);
return this.CreateActionResult(controllerContext, actionDescriptor, actionReturnValue);
}
internal static ActionExecutedContext InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func<ActionExecutedContext> continuation)
{
filter.OnActionExecuting(preContext);
if (preContext.Result != null)
{
return new ActionExecutedContext(preContext, preContext.ActionDescriptor, true, null)
{
Result = preContext.Result
};
}
bool flag = false;
ActionExecutedContext actionExecutedContext = null;
try
{
actionExecutedContext = continuation();
}
catch (ThreadAbortException)
{
actionExecutedContext = new ActionExecutedContext(preContext, preContext.ActionDescriptor, false, null);
filter.OnActionExecuted(actionExecutedContext);
throw;
}
catch (Exception exception)
{
flag = true;
actionExecutedContext = new ActionExecutedContext(preContext, preContext.ActionDescriptor, false, exception);
filter.OnActionExecuted(actionExecutedContext);
if (!actionExecutedContext.ExceptionHandled)
{
throw;
}
}
if (!flag)
{
filter.OnActionExecuted(actionExecutedContext);
}
return actionExecutedContext;
}
protected virtual ActionExecutedContext InvokeActionMethodWithFilters(ControllerContext controllerContext, IList<IActionFilter> filters, ActionDescriptor actionDescriptor, IDictionary<string, object> parameters)
{
ActionExecutingContext preContext = new ActionExecutingContext(controllerContext, actionDescriptor, parameters);
Func<ActionExecutedContext> seed = () => new ActionExecutedContext(controllerContext, actionDescriptor, false, null)
{
Result = this.InvokeActionMethod(controllerContext, actionDescriptor, parameters)
};
Func<ActionExecutedContext> func = filters.Reverse<IActionFilter>().Aggregate(seed, (Func<ActionExecutedContext> next, IActionFilter filter) => () => ControllerActionInvoker.InvokeActionMethodFilter(filter, preContext, next));
return func();
}
protected virtual void InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult)
{
actionResult.ExecuteResult(controllerContext);
}
internal static ResultExecutedContext InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func<ResultExecutedContext> continuation)
{
filter.OnResultExecuting(preContext);
if (preContext.Cancel)
{
return new ResultExecutedContext(preContext, preContext.Result, true, null);
}
bool flag = false;
ResultExecutedContext resultExecutedContext = null;
try
{
resultExecutedContext = continuation();
}
catch (ThreadAbortException)
{
resultExecutedContext = new ResultExecutedContext(preContext, preContext.Result, false, null);
filter.OnResultExecuted(resultExecutedContext);
throw;
}
catch (Exception exception)
{
flag = true;
resultExecutedContext = new ResultExecutedContext(preContext, preContext.Result, false, exception);
filter.OnResultExecuted(resultExecutedContext);
if (!resultExecutedContext.ExceptionHandled)
{
throw;
}
}
if (!flag)
{
filter.OnResultExecuted(resultExecutedContext);
}
return resultExecutedContext;
}
protected virtual ResultExecutedContext InvokeActionResultWithFilters(ControllerContext controllerContext, IList<IResultFilter> filters, ActionResult actionResult)
{
ResultExecutingContext preContext = new ResultExecutingContext(controllerContext, actionResult);
Func<ResultExecutedContext> seed = delegate
{
this.InvokeActionResult(controllerContext, actionResult);
return new ResultExecutedContext(controllerContext, actionResult, false, null);
};
Func<ResultExecutedContext> func = filters.Reverse<IResultFilter>().Aggregate(seed, (Func<ResultExecutedContext> next, IResultFilter filter) => () => ControllerActionInvoker.InvokeActionResultFilter(filter, preContext, next));
return func();
}
protected virtual AuthorizationContext InvokeAuthorizationFilters(ControllerContext controllerContext, IList<IAuthorizationFilter> filters, ActionDescriptor actionDescriptor)
{
AuthorizationContext authorizationContext = new AuthorizationContext(controllerContext, actionDescriptor);
foreach (IAuthorizationFilter current in filters)
{
current.OnAuthorization(authorizationContext);
if (authorizationContext.Result != null)
{
break;
}
}
return authorizationContext;
}
protected virtual ExceptionContext InvokeExceptionFilters(ControllerContext controllerContext, IList<IExceptionFilter> filters, Exception exception)
{
ExceptionContext exceptionContext = new ExceptionContext(controllerContext, exception);
foreach (IExceptionFilter current in filters.Reverse<IExceptionFilter>())
{
current.OnException(exceptionContext);
}
return exceptionContext;
}
internal static void ValidateRequest(ControllerContext controllerContext)
{
if (controllerContext.IsChildAction)
{
return;
}
HttpContext current = HttpContext.Current;
if (current != null)
{
ValidationUtility.EnableDynamicValidation(current);
}
controllerContext.HttpContext.Request.ValidateInput();
}
}
}
ContentResult
EmptyResult
FileResult
FileContentResult
FilePathResult
FileStreamResult
HttpUnauthorizedResult
HttpUnauthorizedResult
HttpUnauthorizedResult
JavaScriptResult
JsonResult
RedirectResult
RedirectToRouteResult
ViewResultBase
PartialViewResult
ViewResult
时间： 2024-10-13 04:50:27