C # Insights and experiences (II.)

This week learned a lot about C # about interface, array of knowledge, here briefly review a few easy to mix places, heavy in understanding.

First, Interface

Use as to avoid exception without an interface when polymorphic:

Document [] Folder  = new Document[5];for (int i = 0; i < 5; i++) {if (i% 2 = = 0) {Folder[i] = new Bigdocumen　　T ("Big Document #" + i);　　} else {Folder[i] = new Littledocument ("Little Document #" + i); }}

If little document does not inherit read (), the direct call will have exception.

foreach (Document doc in folder) {        istorable Isdoc = doc as istorable;        if (Isdoc! = null)        {                isdoc.read ();        }
Else
{                Console.WriteLine ("Istorable not supported");
        }//...}

This example is simple and clear

To explicitly implement an interface:

Using system;using system.collections.generic;using system.linq;using system.text;using System.Threading.Tasks; Namespace consoleapplication2{    class program    {        interface istorable        {            void Read ();            void Write ();        }        Interface Italk        {            void talk ();            void Read ();        public class document:istorable, Italk         {public            void Read () {Console.WriteLine ("read");}            public void Write () {Console.WriteLine ("Write");}            void Italk.read () {Console.WriteLine ("Read of Italk");}            public void Talk () {Console.WriteLine ("Talk");}        }        static void Main (string[] args)        {            document Doc1 = new Document ();            Doc1. Read ();            Italk doc2 = Doc1;            Doc2. Read ();}}    }

1. Explicitly implement no public

2. An explicit call requires a new Italk object (see Code).

Two, Array

New array of 3x5 starting with (2,3):

int[] Lengthsarray = new Int[2] {3, 5};
int[] Boundsarray = new Int[2] {2, 3};
Array Multidimensionalarray = Array.CreateInstance (typeof (String), Lengthsarray, Boundsarray);

C # Insights and experiences (II.)