【移动应用开发技术】ASP.NET中Controller与Action如何使用

【移动应用开发技术】ASP.NET中Controller与Action如何使用

Controller&Action的定义和使用/upload/information/20210522/379/535400.pngController的查找机制Microsoft.AspNet.Mvc

Microsoft.AspNet.Mvc.Core

Microsoft.AspNet.Mvc.ModelBinding

Microsoft.AspNet.Mvc.Razor

Microsoft.AspNet.Mvc.Razor.Host

Microsoft.AspNet.Mvc.TagHelpers

Microsoft.AspNet.Mvc.Xml

Microsoft.AspNet.PageExecutionInstrumentation.InterfacesMicrosoft.AspNet.Mvc

Microsoft.AspNet.Mvc.Core

Microsoft.AspNet.Mvc.ModelBinding

Microsoft.AspNet.Mvc.Razor

Microsoft.AspNet.Mvc.Razor.Host

Microsoft.AspNet.Mvc.TagHelpers

Microsoft.AspNet.Mvc.Xml

Microsoft.AspNet.PageExecutionInstrumentation.Interfacespublic

interface

IAssemblyProvider

{

IEnumerable

CandidateAssemblies

{

get;

}

}services.AddMvc().WithControllersAsServices(new[]

{

typeof(MyController).Assembly,

typeof(ExternalPocoController).Assembly

});var

col

=

this.Resolver.GetRequiredService();

var

data

=

col.GetReferencingLibraries("Microsoft.AspNet.Mvc");protected

virtual

IEnumerableGetCandidateLibraries()

{

if

(ReferenceAssemblies

==

null)

{

return

Enumerable.Empty();

}

//

GetReferencingLibraries

returns

the

transitive

closure

of

referencing

assemblies

//

for

a

given

assembly.

return

ReferenceAssemblies.SelectMany(_libraryManager.GetReferencingLibraries)

.Distinct()

.Where(IsCandidateLibrary);

}Controller的判断public

interface

IControllerTypeProvider

{

IEnumerable

ControllerTypes

{

get;

}

}protected

internal

virtual

bool

IsController([NotNull]

TypeInfo

typeInfo,

[NotNull]

ISet

candidateAssemblies)

{

if

(!typeInfo.IsClass)

//

该类型必须是一个类

{

return

false;

}

if

(typeInfo.IsAbstract)

//

该类必须不是抽象类

{

return

false;

}

//

We

only

consider

public

top-level

classes

as

controllers.

IsPublic

returns

false

for

nested

//

classes,

regardless

of

visibility

modifiers

if

(!typeInfo.IsPublic)

//

该类必须是一个Public类（并且不嵌套），嵌套类不能作为Controller

{

return

false;

}

if

(typeInfo.ContainsGenericParameters)

//

该类不能是泛型类

{

return

false;

}

if

(!typeInfo.Name.EndsWith(ControllerTypeName,

StringComparison.OrdinalIgnoreCase)

&&

!DerivesFromController(typeInfo,

candidateAssemblies))

//

该类以Controller结尾，或继承于Controller基类，或其父类也是Controller。

{

return

false;

}

if

(typeInfo.IsDefined(typeof(NonControllerAttribute)))

//

该类不能设置NonControllerAttribute特性

{

return

false;

}

return

true;

}services.AddMvc().WithControllersAsServices(new[]

{

typeof(MyController),

typeof(ExternalPocoController)

});Action的查找机制public

Task

SelectAsync([NotNull]

RouteContext

context)

{

//

...

}public

Task

SelectAsync([NotNull]

RouteContext

context)

{

//

...

}public

IEnumerable

BuildActionModels([NotNull]

TypeInfo

typeInfo,

[NotNull]

MethodInfo

methodInfo)

{

if

(!IsAction(typeInfo,

methodInfo))

{

return

Enumerable.Empty();

}

//

省略其它代码

}protected

virtual

bool

IsAction([NotNull]

TypeInfo

typeInfo,

[NotNull]

MethodInfo

methodInfo)

{

//

The

SpecialName

bit

is

set

to

flag

members

that

are

treated

in

a

special

way

by

some

compilers

//

(such

as

property

accessors

and

operator

overloading

methods).

if

(methodInfo.IsSpecialName)

//

不能是特殊名称（如重载的操作符或属性访问器）

{

return

false;

}

if

(methodInfo.IsDefined(typeof(NonActionAttribute)))

//

不能声明NonActionAttribute特性

{

return

false;

}

//

Overriden

methods

from

Object

class,

e.g.

Equals(Object),

GetHashCode(),

etc.,

are

not

valid.

if

(methodInfo.GetBaseDefinition().DeclaringType

==

typeof(object))

//不能是重载的方法，比如Equals和GetHashCode

{

return

false;

}

//

Dispose

method

implemented

from

IDisposable

is

not

valid

if

(IsIDisposableMethod(methodInfo,

typeInfo))

//

不能是Dispose方法

{

return

false;

}

if

(methodInfo.IsStatic)

//

不能是静态方法

{

return

false;

}

if

(methodInfo.IsAbstract)

//

不能是抽象方法

{

return

false;

}

i