C#_assembly-reflection_ Assembly and reflection

Assembly:

The concept of the 1..net. exe. DLL (available for loading by itself cannot perform a no-entry function main function)

2. Include

Type metadata (the type defined in the code)

Assembly metadata (describes the assembly itself)

Il code

Resource file

Benefits of using assemblies: one is to reduce the size of the program itself (because you can call only the DLLs you need) module Two is the encapsulation code to provide an interface

--How to add a reference to an assembly: Add path, project reference, GAC (global assembly Cache)//cannot loop Add Reference//c# can invoke DLL files written by other programs

---------------------------------Reflection--------------------------------------------------------------------

Reflection: Can be understood as a technical means to get the type meta-data

Create an object directly from a. dll, invoke a member

We first create the main program in the same project, and then build another assembly (under the same project)

Here Testclasslibrary is a class library to add some types of classes in Class1.cs AH interface ah commissioned ah what:

1 usingSystem;2 usingSystem.Collections.Generic;3 usingSystem.Linq;4 usingSystem.Text;5 usingSystem.Threading.Tasks;6 7 namespacetestclasslibary8 {9      Public classClass1Ten     { One  A     } -  -     Internal classPrivatemyclass the     { -          -     } -  +      Public class Person -     { +          Public stringName {Get;Set; } A          Public intAge {Get;Set; } at          Public stringEmail {Get;Set; } -  -     } -  -      Public Delegate voidmydelegate (); -  in      Public Interfaceiflyable -     { to         voidFly (); +     } -  the}

Class Library

Then right-click Generate to find the DLL file path under the Debug directory:

F:\Cheng_20140819\VS2012_WorkSpace\_Assembly\Assembly\TestClassLibary\bin\Debug\TestClassLibrary.dll

This can be dynamically loaded in our main program. ^_~

Jiangzi

1     #regionTo get a type in another assembly2             //Dynamically loading Assemblies3Assembly-Assembly.loadfile (@"F:\Cheng_20140819\VS2012_WorkSpace\Assembly\Assembly\TestClassLibary\bin\Debug\TestClassLibary.dll");4 5             //GetType () here is equivalent to TypeOf (Assembly) cannot get all the types in all assemblies6 7             //use GetTypes to get all types of public internal can get8type[] ts =The . GetTypes ();9             foreach(Type Iteminchts)Ten             { One Console.WriteLine (item. Name); A             } -  -             //get only the types that are exposed the             //get the type of export -type[] Publictypes =The . Getexportedtypes (); -             foreach(Type Iteminchpublictypes) -             { +Console.WriteLine ("--->>"+item. Name); -             } +             #endregion

Of course, if we want to get the specified type call Overload:

Assembly assembly.loadfile (@ "F:\Cheng_20140819\VS2012_WorkSpace\20151129_Heima_Day11_Assembly\Assembly\ Testclasslibary\bin\debug\testclasslibary.dll ");

---------------------------------------------here assume that there is an Add method in the person class that gets the return value of two parameters after adding a method, remember to regenerate

Gets the specific type
Type PersonType =.   GetType ("testclasslibary.person"); The type requires a fully qualified name: Remember to bring a namespace yo ~

To create an object based on a specific type
Object personobj = Activator.CreateInstance (PersonType);

Get a specific method
MethodInfo method = Persontype.getmethod ("Add");

Call
Object Obj= method.　　　　Invoke (Personobj, new object[] {2, 3}); Parameter 1 represents the object of the obtained type, and Parameter 2 represents the parameter list of the called method

--------------------------------Call Property---------------------

1Assembly-Assembly.loadfile (@"F:\Cheng_20140819\VS2012_WorkSpace\Assembly\Assembly\TestClassLibary\bin\Debug\TestClassLibary.dll");2 3Type t =. GetType ("Testclasslibary.person");4 5             Objectobj =activator.createinstance (t);6 7PropertyInfo Pifo = T.getproperty ("Name");8 9Pifo. SetValue (obj,"Cheng");Ten  OneMethodInfo Mifo = T.getmethod ("Writename"); A  -Mifo. Invoke (obj,NULL);

--------------------------------use a specific constructor

1             #regionManually find the constructor and call the constructor to create the object of the type2Assembly-Assembly.loadfile (@"F:\Cheng_20140819\VS2012_WorkSpace\20151129_Heima_Day11_Assembly\Assembly\TestClassLibary\bin\Debug\ TestClassLibary.dll");3 4Type Persontype=ass. GetType ("Testclasslibary.person");5 6  　　　　　　　　 //Use ctor GetConstructor () whose argument list is a list of the specified constructors7ConstructorInfo ctor= Persontype.getconstructor (NewType[] {typeof(string),typeof(int),typeof(string)});8             ObjectO = ctor. Invoke (New Object[] {"CCC", -,"[email protected]" });9 Console.WriteLine (o.tostring ());TenMethodInfo MInfo = Persontype.getmethod ("Writename"); OneMinfo.invoke (O,NULL); A  -             #endregion

　　

C#_assembly-reflection_ Assembly and reflection