A simple example of. NET reflection

(1) namespace ClassLibrarySport

{

Public abstract class Sport

{

Protected string name;

Public abstract string GetName ();

Public abstract string GetDuration ();

}

}

========================================================== ==============

(2) namespace ClassLibrarySomeSports // This project adds a reference to (1)

{

Public class Football: ClassLibrarySport. Sport

{

Public Football ()

{

Name = "Football ";

}

Public override string GetName ()

{

Return name;

}

Public override string GetDuration ()

{

Return "four 15 minute quarters ";

}

}

}

========================================================== ==============

(3) namespace ConsoleAssemblyTest // This project adds a reference to (1)

{

Class Program

{

Static void Main (string [] args)

{

Assembly assembly = Assembly. LoadFrom (@ "E: \ ClassLibrarySomeSports \

Bin \ Debug \ ClassLibrarySomeSports. dll ");

Type [] types = assembly. GetTypes ();

Console. WriteLine ("Get Type From ClassLibrarySomeSports. dll :");

For (int I = 0; I <types. Length; I)

{

Console. WriteLine (types [I]. Name );

}

// Use the GetConstructor () method to obtain the constructor of the corresponding type and construct the object of this type.

Console. WriteLine ("Use Method GetConstructor ():");

ConstructorInfo ci = types [0]. GetConstructor (new Type [0]);

ClassLibrarySport. Sport sport = (ClassLibrarySport. Sport) ci. Invoke (new object [0]);

Console. WriteLine (sport. GetName () "has" sport. GetDuration ());

// Use Activator. CreateInstance () to construct an object of this type

// Use assembly. CreateInstance () to return null ,??

Console. WriteLine ("Use Method CreateInstance ():");

ClassLibrarySport. Sport sport1 = (ClassLibrarySport. Sport)

Activator. CreateInstance (types [0]);

Console. WriteLine (sport1.GetName () "has" sport1.GetDuration ());

// Reflect the method named "GetDuration" in the specified type and execute this method using the Invoke () method.

Object objSport = Activator. CreateInstance (types [0]);

MethodInfo method = types [0]. GetMethod ("GetDuration ");

Object o = method. Invoke (objSport, new object [0]);

Console. WriteLine (o as string );

Console. Read ();

}

}

}

==========================================================

Output:

Get Type From ClassLibrarySomeSports. dll:

Football

Use Method GetConstructor ():

Football has four 15 minute quarters

Use Method CreateInstance ():

Football has four 15 minute quarters

Four 15 minute quarters