/// <summary>
/// 添加过滤器
/// </summary>
/// <param name="filter">过滤器</param>
/// <exception cref="ArgumentNullException"></exception>
/// <returns></returns>
public static bool Add(IFilter filter)
{
if (filter == null)
{
throw new ArgumentNullException();
}
if (filter.AllowMultiple == false)
{
var allFilters = ActionFilters.Cast <IFilter>().Concat(AuthorizationFilters).Concat(ExceptionFilters);
if (allFilters.Any(item => item.GetType() == filter.GetType()))
{
return(false);
}
}
var actionFilter = filter as IActionFilter;
var authorizationFilter = filter as IAuthorizationFilter;
var exceptionFilter = filter as IExceptionFilter;
if (actionFilter != null)
{
ActionFilters = ActionFilters
.Concat(new[] { actionFilter })
.OrderBy(item => item.Order);
}
if (authorizationFilter != null)
{
AuthorizationFilters = AuthorizationFilters
.Concat(new[] { authorizationFilter })
.OrderBy(item => item.Order);
}
if (exceptionFilter != null)
{
ExceptionFilters = ExceptionFilters
.Concat(new[] { exceptionFilter })
.OrderBy(item => item.Order);
}
return(true);
}
