//tries to get a CommandBehaviorBinding from the element. Creates a new instance if there is not one attached
private static CommandBehaviorBinding FetchOrCreateBinding(DependencyObject d)
{
CommandBehaviorBinding binding = GetBehavior(d);
if (binding == null)
{
binding = new CommandBehaviorBinding();
SetBehavior(d, binding);
}
return(binding);
}
/// <summary>
/// Главная точка входа
/// </summary>
private static void OnEventChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
CommandBehaviorBinding binding = FetchOrCreateBinding(d);
// check if the Event is set. If yes we need to rebind the Command to the new event and unregister the old one
if (binding.Event != null && binding.Owner != null)
{
binding.Dispose();
}
//bind the new event to the command
binding.BindEvent(d, e.NewValue.ToString());
}
//Создает EventHandler во время выполнения и регистрирует обработчик указанного события
public void BindEvent(DependencyObject owner, string eventName)
{
this.EventName = eventName;
this.Owner = owner;
this.Event = Owner.GetType().GetEvent(this.EventName, BindingFlags.Public | BindingFlags.Instance);
if (this.Event == null)
{
throw new InvalidOperationException(String.Format("Не удалось разрешить имя события {0}", EventName));
}
// Создается обработчик события для event, который вызовет ExecuteCommand()
var mi = typeof(CommandBehaviorBinding).GetMethod("ExecuteCommand2", BindingFlags.Public | BindingFlags.Instance);
this.EventHandler = CommandBehaviorBinding.CreateDelegate(this.Event.EventHandlerType, mi, this);
// Регистрация нашего обработчика для Event
this.Event.AddEventHandler(this.Owner, this.EventHandler);
this.disposed = false;
}
/// <summary>
/// Handles changes to the Event property.
/// </summary>
private static void OnEventChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (DesignerProperties.GetIsInDesignMode(d))
{
return;
}
CommandBehaviorBinding binding = FetchOrCreateBinding(d);
//check if the Event is set. If yes we need to rebind the Command to the new event and unregister the old one
if (binding.Event != null && binding.Owner != null)
{
binding.Dispose();
}
//if (string.IsNullOrEmpty((string)e.NewValue))
// return;
//bind the new event to the command
binding.BindEvent(d, e.NewValue.ToString());
}
/// <summary>
/// 过滤器的方式执行 Action
/// </summary>
/// <param name="action">Controller中的Action</param>
/// <param name="parameter">Controller中的Action的参数</param>
/// <param name="Route">Mvc路由信息模型，无需设置Action和ActionName,如果你在filter中需要信息，你可以传递此参数,主要是EventName,Owner值设置</param>
public void UseFilter(Expression <Func <T, ActionResult> > action, object parameter, CommandBehaviorBinding Route)
{
Func <T, ActionResult> result = action.Compile();
ActionResult _actionResult = result(Controller);
if (_actionResult != null)
{
var memberExpression = action.Body as MemberExpression;
if (memberExpression == null)
{
throw new ArgumentException("PropertySupport_NotMemberAccessExpression_Exception", "propertyExpression");
}
var propertyInfo = memberExpression.Member as System.Reflection.PropertyInfo;
if (propertyInfo == null)
{
throw new ArgumentException("PropertySupport_ExpressionNotProperty_Exception", "propertyExpression");
}
//获取控制器类型
var objTyp1 = Controller.GetType();
var objType = Controller.GetType().DeclaringType;
if (objType == null && objTyp1 != null)
{
objType = objTyp1;
}
if (objType == null && objTyp1 == null)
{
objType = Route.Action.Target.GetType();
if (objType == null)
{
return;
}
}
if (objType != null)
{
//获得控制器是否有filter AY 2017-8-17 14:06:01
var controllerAttribute =
objType.GetCustomAttributes(typeof(FilterAttribute), false);
List <FilterAttribute> controllerFilters = null;
List <FilterAttribute> actionFilters = null;
if (controllerAttribute != null && controllerAttribute.Length > 0)
{
controllerFilters = new List <FilterAttribute>();
foreach (object ta in controllerAttribute)
{
controllerFilters.Add(ta as FilterAttribute);
}
//排序筛选器 AY 2017-8-17 14:05:56
//同类型过滤器 controller和action只会执行1次，或者2个都执行
controllerFilters = controllerFilters.OrderBy(a => a.Order).ToList();
}
if (propertyInfo != null)
{
var attribute =
propertyInfo.GetCustomAttributes(typeof(FilterAttribute), false);
if (attribute != null && attribute.Length > 0)
{
actionFilters = new List <FilterAttribute>();
foreach (object ta in attribute)
{
actionFilters.Add(ta as FilterAttribute);
}
}
}
var _this = new ActionExecutionStrategy();
if (Route == null)
{
Route = new CommandBehaviorBinding();
}
Route.Action = _actionResult;
Route.ActionName = propertyInfo.Name;
Route.CommandParameter = parameter;
//设置controller 2017-9-21 13:35:36
if (Route.Owner != null)
{
System.Windows.FrameworkElement _100 = Route.Owner as System.Windows.FrameworkElement;
if (_100 != null)
{
Route.Controller = _100.DataContext as Controller;
if (Controller == null)
{
var _1011 = _100.GetVisualAncestor <System.Windows.Controls.UserControl>();
if (_1011 != null)
{
Route.Controller = _1011.DataContext as Controller;
if (Controller == null)
{
var _101 = _100.GetVisualAncestor <System.Windows.Controls.Page>();
if (_101 != null)
{
Route.Controller = _101.DataContext as Controller;
}
if (Controller == null)
{
var _102 = System.Windows.Window.GetWindow(_100);
if (_102 != null)
{
Route.Controller = _102.DataContext as Controller;
}
}
}
}
}
}
}
var _testIsArray = parameter as object[];
if (_testIsArray != null)
{
Route.IsSendEventArgs = true;
}
_this.Route = Route;
if (controllerFilters == null && actionFilters == null)
{
Route.Action(parameter);
}
else if (controllerFilters == null && actionFilters != null)
{
bool isForbid = false;
List <AuthorizeAttribute> authorizationFilter = new List <AuthorizeAttribute>();
List <ActionFilterAttribute> actionFilter = new List <ActionFilterAttribute>();
for (int i = 0; i < actionFilters.Count(); i++)
{
var _temp = actionFilters[i] as AuthorizeAttribute;
if (_temp != null)
{
authorizationFilter.Add(_temp);
}
else
{
var _temp2 = actionFilters[i] as ActionFilterAttribute;
if (_temp2 != null)
{
actionFilter.Add(_temp2);
}
}
}
authorizationFilter = authorizationFilter.OrderBy(a => a.Order).ToList();
//优先执行IAuthorizationFilter
foreach (var item in authorizationFilter)
{
bool isOK = item.OnAuthorization(_this);
if (!isOK)
{
isForbid = true;
break;
}
}
if (isForbid)
{
return;
}
else
{
actionFilter = actionFilter.OrderBy(a => a.Order).ToList();
foreach (var item in actionFilter)
{
item.OnActionExecuting(_this);
}
_actionResult(parameter);
//2017-8-18 11:58:45 从 Controller级别执行前-> action级别执行前 -> 执行 -> action级别执行后 -> Controller级别 执行后
int maxLength = actionFilter.Count();
for (int i = maxLength - 1; i >= 0; i--)
{
actionFilter[i].OnActionExecuted(_this);
}
}
}
else if (controllerFilters != null && actionFilters == null) //控制器全局
{
bool isForbid = false;
List <AuthorizeAttribute> authorizationFilter = new List <AuthorizeAttribute>();
List <ActionFilterAttribute> actionFilter = new List <ActionFilterAttribute>();
for (int i = 0; i < controllerFilters.Count(); i++)
{
var _temp = controllerFilters[i] as AuthorizeAttribute;
if (_temp != null)
{
authorizationFilter.Add(_temp);
}
else
{
var _temp2 = controllerFilters[i] as ActionFilterAttribute;
if (_temp2 != null)
{
actionFilter.Add(_temp2);
}
}
}
authorizationFilter = authorizationFilter.OrderBy(a => a.Order).ToList();
//优先执行IAuthorizationFilter
foreach (var item in authorizationFilter)
{
bool isOK = item.OnAuthorization(_this);
if (!isOK)
{
isForbid = true;
break;
}
}
if (isForbid)
{
return;
}
else
{
actionFilter = actionFilter.OrderBy(a => a.Order).ToList();
foreach (var item in actionFilter)
{
item.OnActionExecuting(_this);
}
Route.Action(parameter);
//2017-8-18 11:58:45 从 Controller级别执行前-> action级别执行前 -> 执行 -> action级别执行后 -> Controller级别 执行后
int maxLength = actionFilter.Count();
for (int i = maxLength - 1; i >= 0; i--)
{
actionFilter[i].OnActionExecuted(_this);
}
}
}
else if (controllerFilters != null && actionFilters != null)
{
//第一步洗牌：排序
//第二步洗牌：归类
//第三步洗牌：筛选
//第四步洗牌：挑拣
//第五步洗牌：为了执行
bool isForbid = false;
//归类
List <AuthorizeAttribute> authorizationControllerFilter = new List <AuthorizeAttribute>();
List <ActionFilterAttribute> actionControllerFilter = new List <ActionFilterAttribute>();
for (int i = 0; i < controllerFilters.Count(); i++)
{
var _temp = controllerFilters[i] as AuthorizeAttribute;
if (_temp != null)
{
authorizationControllerFilter.Add(_temp);
}
else
{
var _temp2 = controllerFilters[i] as ActionFilterAttribute;
if (_temp2 != null)
{
actionControllerFilter.Add(_temp2);
}
}
}
//当前要被执行的的过滤器
List <AuthorizeAttribute> authorizationFilterWilling = new List <AuthorizeAttribute>();
List <ActionFilterAttribute> actionFilterWilling = new List <ActionFilterAttribute>();
for (int i = 0; i < actionFilters.Count(); i++)
{
var _temp = actionFilters[i] as AuthorizeAttribute;
if (_temp != null)
{
var _afilterType = _temp.GetType();
bool hasSame = false;
foreach (var item in authorizationControllerFilter)
{
if (_afilterType == item.GetType())
{
hasSame = true;
//查看策略
switch (_temp.FilterScope)
{
case FilterScope.Controller:
authorizationFilterWilling.Add(item);
break;
case FilterScope.Action:
authorizationFilterWilling.Add(_temp);
break;
case FilterScope.Both:
authorizationFilterWilling.Add(item);
authorizationFilterWilling.Add(_temp);
break;
}
break;
}
}
if (!hasSame)
{
authorizationFilterWilling.Add(_temp);
}
}
else
{
var _temp2 = actionFilters[i] as ActionFilterAttribute;
if (_temp2 != null)
{
var _afilterType = _temp2.GetType();
bool hasSame = false;
foreach (var item in actionControllerFilter)
{
if (_afilterType == item.GetType())
{
hasSame = true;
//查看策略
switch (_temp2.FilterScope)
{
case FilterScope.Controller:
actionFilterWilling.Add(item);
break;
case FilterScope.Action:
actionFilterWilling.Add(_temp2);
break;
case FilterScope.Both:
actionFilterWilling.Add(item);
actionFilterWilling.Add(_temp2);
break;
}
break;
}
}
if (!hasSame)
{
actionFilterWilling.Add(_temp2);
}
}
}
}
//执行时，action是同类别的filter，如果有，获得FilterScope，决定再怎么执行
//优先执行授权，再action
//优先执行IAuthorizationFilter ============筛选AuthorizeAttribute
//第四步 挑拣 ↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓ AY2017-8-18 11:41:01
int aclength = authorizationControllerFilter.Count();
int aalength = authorizationFilterWilling.Count();
for (int i = 0; i < aclength; i++)
{
bool hasSame = false;
for (int j = 0; j < aalength; j++)
{
if (authorizationControllerFilter[i].GetType() == authorizationFilterWilling[j].GetType())
{
hasSame = true;
break;
}
}
if (!hasSame)
{
authorizationFilterWilling.Add(authorizationControllerFilter[i]);
}
}
int alength = actionControllerFilter.Count();
int awlength = actionFilterWilling.Count();
for (int i = 0; i < aclength; i++)
{
bool hasSame = false;
for (int j = 0; j < awlength; j++)
{
if (actionControllerFilter[i].GetType() == actionFilterWilling[j].GetType())
{
hasSame = true;
break;
}
}
if (!hasSame)
{
actionFilterWilling.Add(actionControllerFilter[i]);
}
}
//第四步 挑拣完成↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑
//优先执行IAuthorizationFilter
authorizationFilterWilling = authorizationFilterWilling.OrderBy(a => a.Order).ToList();
foreach (var item in authorizationFilterWilling)
{
bool isOK = item.OnAuthorization(_this);
if (!isOK)
{
isForbid = true;
break;
}
}
if (isForbid)
{
return;
}
else
{
actionFilterWilling = actionFilterWilling.OrderBy(a => a.Order).ToList();
foreach (var item in actionFilterWilling)
{
item.OnActionExecuting(_this);
}
Route.Action(parameter);
//2017-8-18 11:58:45 从 Controller级别执行前-> action级别执行前 -> 执行 -> action级别执行后 -> Controller级别 执行后
int maxLength = actionFilterWilling.Count();
for (int i = maxLength - 1; i >= 0; i--)
{
actionFilterWilling[i].OnActionExecuted(_this);
}
}
}
}
}
//var getMethod = property.GetGetMethod(true);
//if (getMethod.IsStatic)
//{
// throw new ArgumentException("PropertySupport_StaticExpression_Exception", "propertyExpression");
//}
}
/// <summary>
/// 过滤器的方式执行 Action
/// </summary>
/// <param name="action">Controller中的Action</param>
/// <param name="parameter">Controller中的Action的参数</param>
/// <param name="sender">当前事件的Sender参数</param>
/// <param name="eventArgs">当前事件的args参数</param>
/// <param name="Route">Mvc路由信息模型，无需设置Action和ActionName,如果你在filter中需要信息，你可以传递此参数,主要是EventName,Owner值设置</param>
public void UseFilter(Expression <Func <T, ActionResult> > action, object parameter, object sender, EventArgs eventArgs, CommandBehaviorBinding Route)
{
UseFilter(action, new object[] { parameter, sender, eventArgs }, Route);
}
/// <summary> /// Sets the Behavior property. /// </summary> private static void SetBehavior(DependencyObject d, CommandBehaviorBinding value) => d.SetValue(BehaviorProperty, value);
/// <summary>
/// Одна из точек входа
/// </summary>
private static void OnCommandChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
CommandBehaviorBinding binding = FetchOrCreateBinding(d);
binding.Command = (ICommand)e.NewValue;
}
/// <summary>
/// Sets the Behavior property.
/// </summary>
private static void SetBehavior(DependencyObject d, CommandBehaviorBinding value)
{
d.SetValue(BehaviorProperty, value);
}
//tries to get a CommandBehaviorBinding from the element. Creates a new instance if there is not one attached
private static CommandBehaviorBinding FetchOrCreateBinding(DependencyObject d)
{
CommandBehaviorBinding binding = CommandBehavior.GetBehavior(d);
if (binding == null)
{
binding = new CommandBehaviorBinding();
CommandBehavior.SetBehavior(d, binding);
}
return binding;
}
/// <summary>Sets the Behavior property</summary> private static void Set__Behavior([NotNull] DependencyObject d, CommandBehaviorBinding value) => d.SetValue(__BehaviorProperty, value);
