Programmering II Januar 2017

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Contents

Generalt

  • Link til C# WPF (film materiale): C# WPF

Telnet fra Csharp

MSSQL server 2012 installation

Diverse

Bold spil: https://drive.google.com/file/d/0B5oDizcmFQ1YRUdIdG1lMEtWbTA/view?usp=sharing

Nedarvning: https://drive.google.com/file/d/0B5oDizcmFQ1YRGVzQ1NQdVhpdVk/view?usp=sharing

delegates:

delegate void ShootWeapon();
 
        static void Main(string[] args)
        {
            ShootWeapon shoot = ShootRifle;
            shoot();
            Console.WriteLine("Changing weapon");
            shoot = ShootPistol;
            shoot();
            Console.ReadKey();
 
        }
 
        static void ShootRifle()
        {
            Console.WriteLine("Shooting rifle. 50 damage.");
        }
 
        static void ShootPistol()
        {
            Console.WriteLine("Shooting pistol. 10 damage.");
        }

enumerations:

enum weapons
        {
            rifle,
            pistol,
            knife
        }
 
        static weapons currentWeapon;
 
        static void Main(string[] args)
        {
            currentWeapon = weapons.rifle;
            Shoot();
            Console.WriteLine("Switching weapon");
            currentWeapon = weapons.pistol;
            Shoot();
 
 
            Console.ReadKey();
        }
 
        static void Shoot()
        {
            if(currentWeapon == weapons.rifle)
            {
                Console.WriteLine("Shooting with rifle. 50 damage");
            }
            else if (currentWeapon == weapons.pistol)
            {
                Console.WriteLine("Shooting with pistol. 10 damage");
            }
 
        }

Statiske klasser En statisk klasse kan til gås alle steder fra vores kode. Husk at lave variablerne sattiske også:

        static void Main(string[] args)
        {
            //Statiske klasser skal ikke instancieres.
            //De kan tilgåes alle steder fra.
            Console.WriteLine(StaticData.staticString);
            Console.ReadKey();
        }
    }
 
    //Bemærk at jeg har indsat nøgleordet 'static' før 'class' ordet på linjen her under:
    static class StaticData
    {
        public static int staticInt = 100;
        public static string staticString = "Mads";
    }

Begynder hold

Variabler

En variabel er noget som indeholder en værdi. Det kunne eksempelvis være brugerens navn der bliver indtastet i programmet, og gemt i en værdi.

Værdityper er som følgende:

Variabler
Type værdi
string "Dette er tekst"
int 9001
float 123.45
bool true/false


Færdig gør denne lommeregner:

https://drive.google.com/file/d/0B5oDizcmFQ1YZTV4Vm96Z282cTQ/view?usp=sharing

Færdiggør dette spil (Tic Tac Toe):

https://drive.google.com/file/d/0B5oDizcmFQ1YcER5ZF9HU21oQnM/view?usp=sharing

Spiludvikling i WPF

Snapshot (klokken 13): https://drive.google.com/file/d/0B5oDizcmFQ1YRHhmTFE4WHFMQ1k/view?usp=sharing

Snapshot (klokken 14:30): https://drive.google.com/file/d/0B5oDizcmFQ1YdUNrd3dsS1FiMzA/view?usp=sharing

Snapshot (dag 2 klokken 9:10) : https://drive.google.com/file/d/0B5oDizcmFQ1YWUd2am9BTE53cmc/view?usp=sharing

Snapshot (dag 2 klokken 10:10 FINAL) : https://drive.google.com/file/d/0B5oDizcmFQ1YOFk1SkstRkI2OEU/view?usp=sharing

Mads' RTS spil: https://drive.google.com/file/d/0B5oDizcmFQ1YaklBQ3phdGNBT3c/view?usp=sharing

Middel hold

Opgave 1:

Lav en BMI beregner som denne:

http://www.beregnbmi.dk/Default.aspx


Opgave 2:

Lav en lommeregner lignende den som findes i Windows.

For at konvertere en string til en decimal bruges følgende kode:

string input = textBox.Text;
decimal convertedInput = decimal.Parse(input);


Lommeregner eksempel:

https://drive.google.com/file/d/0B5oDizcmFQ1YMzBVMUk3ZUZxbzg/view?usp=sharing


Serializerings eksempel:

            //Opretter et GameData objekt:
            GameData gd = new GameData();
            gd.playerMoney = 100;
 
            //Hvad vi skal bruge til at serializere:
            XmlSerializer serializer = new XmlSerializer(typeof(GameData));
            StringWriter sWriter = new StringWriter();
 
            //Serializering af objekt:
            serializer.Serialize(sWriter, gd);
 
            //Opretter en string med alt XML:
            string myXml = sWriter.ToString();
 
            //Udskriver XML fil til skrivebordet. BEMÆRK at du skal ændre filstien for at det virker:
            //File.WriteAllText(@"C:\Users\MaKN\Desktop\save.xml", myXml);
 
            //Indlæsning af XMLfil fra skrivebordet:
            string readXML = File.ReadAllText(@"C:\Users\MaKN\Desktop\save.xml");
            Console.WriteLine(readXML);
 
            //Deserializering af xmlfil til objekt:
            StringReader sReader = new StringReader(readXML);
            GameData newGD = (GameData)serializer.Deserialize(sReader);
 
            //Udskriver den nye værdi fra det nye objekt:
            Console.WriteLine("New GameData money value is: "+ newGD.playerMoney);
            Console.ReadKey();

GameData klasse: (husk at lave den public)

    [Serializable]
    public class GameData
    {
        public int playerMoney = 0;
        public int playerUpgrades = 0;
    }

Expert hold

Opgave 1:

Lav et program der kan sende data til en applikation som kan lytte. Benyt gerne UDP.

Opgave 2:

Udvid programmet så programmerne kan både sende og modtage data til hinanden. (et simpelt chat program.)

Listener

            UdpClient client = new UdpClient(11000);
            IPEndPoint endPoint = new IPEndPoint(IPAddress.Any, 11000);
 
            byte[] recivedArray = client.Receive(ref endPoint);
            string message = Encoding.ASCII.GetString(recivedArray);
 
            Console.WriteLine("The message was:");
            Console.WriteLine(message);
            Console.ReadKey();


Sender

            string message = "Hello!";
            UdpClient client = new UdpClient();
            IPEndPoint endpoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 11000);
            byte[] bArray = Encoding.ASCII.GetBytes(message);
 
            client.Send(bArray, bArray.Length, endpoint);
            Console.WriteLine("Message has been sent!");
            Console.ReadKey();


Serializering:

            Human joshua = new Human();
            joshua.name = "Joshua";
            joshua.money = 20000;
 
            XmlSerializer serializer = new XmlSerializer(typeof(Human));
            StringWriter sWriter = new StringWriter();
 
            serializer.Serialize(sWriter, joshua);
 
            string myXml = sWriter.ToString();
 
            Console.WriteLine(myXml);
            Console.ReadKey();
 
            StringReader sReader = new StringReader(myXml);
 
            Human newJoshua = (Human)serializer.Deserialize(sReader);
            Console.WriteLine("New Human was created!");
 
            Console.WriteLine(newJoshua.name);
            Console.WriteLine(newJoshua.money);
            Console.ReadKey();

Opgave:

Send et objekt fra et program til et andet program igennem UDP eller TCP.

SQLite

SQLite eksempel i konsollen:

class Program
    {
        static SQLiteConnection connection;
        static void Main(string[] args)
        {
            Console.WriteLine("Opening database:");
            //SQLiteConnection.CreateFile("myDatabase.db");
            connection = new SQLiteConnection(@"Data Source=C:\Users\MaKN\Desktop\myHeroeDatabase.db");
            connection.Open();
            Console.WriteLine("Connection successfull.");
 
            //string sqlQuery = "INSERT INTO heroes VALUES ('Iron Man', 42)";
            string sqlSelectQuery = "SELECT * FROM heroes";
 
            SQLiteCommand command = new SQLiteCommand(sqlSelectQuery, connection);
 
            command.ExecuteNonQuery();
 
            SQLiteDataReader reader = command.ExecuteReader();
            while (reader.Read())
            {
                Console.WriteLine("Name: " + reader["name"]);
                Console.WriteLine("Age: " + reader["age"] + "\n");
            }
            connection.Close();
            Console.ReadKey();
        }
    }

SQL commands:

CRUD = Create, Read, Update, Delete.


CREATE table HEROES (name TEXT, age INT)

INSERT into HEROES (name, age) VALUES (‘Batman’, 39)

Select * from HEROES where age > 30;

Update HEROES set name = ‘Buttman’ Where name = ‘Batman’

DELETE from HEROES Where name = ‘Buttman’


Link til SQLite tutorials:

http://blog.tigrangasparian.com/2012/02/09/getting-started-with-sqlite-in-c-part-one/

https://nickcharlton.net/posts/sqlite-with-csharp.html

opgave

Lav et program i konsollen (eller en webForm), hvor brugeren kan indtaste en helt (navn, alias, superkraft ect.) som bliver gemt i databasen.

Programmet skal kunne udskrive en liste over alle helte der ligger i databasen.

Brugeren skal have mulighed for at slette en helt fra databasen.


SQLite eksempel 2:

            SQLiteConnection connection = new SQLiteConnection(@"Data Source=C:\Users\MaKN\Desktop\asdf.db");
            connection.Open();
            string query = "CREATE TABLE IF NOT EXISTS heroes (name TEXT, age INTEGER, powerLevel REAL)";
            SQLiteCommand command = new SQLiteCommand(query, connection);
 
            command.ExecuteNonQuery();
 
            //Console.WriteLine("Indtast en superhelt:");
            //string heroName = Console.ReadLine();
 
            //Console.WriteLine("Indtast heltens alder:");
            //int heroAge = Convert.ToInt32(Console.ReadLine());
 
            //float herolevel = 0;
 
            //bool success = false;
            //while (success == false)
            //{
            //    Console.WriteLine("Indtast heltens powerlevel:");
            //    success = float.TryParse(Console.ReadLine(), out herolevel);
            //    Console.WriteLine("Brug kun numeriske værdier");
            //    Console.WriteLine("Prøv igen");
            //}
 
            //string newQuery = $"INSERT INTO heroes (name, age, powerLevel) VALUES ('{heroName}', {heroAge}, {herolevel})";
            //SQLiteCommand newCommand = new SQLiteCommand(newQuery, connection);
            //newCommand.ExecuteNonQuery();
 
            string updateQuery = "UPDATE heroes set powerLevel = 1 WHERE name = 'spiderman'";
            SQLiteCommand updateCommand = new SQLiteCommand(updateQuery, connection);
 
            updateCommand.ExecuteNonQuery();
 
            connection.Close();
            Console.ReadKey();

opgave 2

Opret en knap i Web forms, der kan slette indhold fra databasen. Benyt eksempel koden her under:

            Button btn2 = new Button();
            btn2.ID = "btnEdit";
            btn2.Text = "Edit Member";
            btn2.Click += new EventHandler(btnEdit_Click);
            form1.Controls.Add(btn2);

SQLite Login eksempel

Link til eksempel projekt med login: https://drive.google.com/file/d/0B5oDizcmFQ1YbGJoZE9vQ19rU0U/view?usp=sharing


Dræber eksamensopgaven

Link til eksamensopgaven: https://drive.google.com/file/d/0B5oDizcmFQ1YMTdRa2FzY0w3ZFk/view?usp=sharing

This page was last modified on 23 January 2017, at 09:14. This page has been accessed 1,292 times.