Практикум прикладного программирования на C# в среде VS.NET 2008 - ответы

public static readonly RoutedEvent StopClockEvent;

this.FontFamily = new FontFamily("Arial");    this.FontSize = 1.3333 * 36;    // 36pt    this.FontWeight = FontWeights.Bold;    this.Background = Brushes.Red;    this.Foreground = Brushes.Yellow;    this.Padding = new Thickness(5, 0, 5, 0);   

public event EventHandler StopDigitalClock;

Пример кода:

DispatcherTimer timer;public DigitalClock()

namespace WpfControlLibrary{    public partial class Clock : UserControl    {        public Clock()        {            InitializeComponent();

 clock = this.Resources["clock"] as DigitalClock;   }    DigitalClock clock; // Ссылка на экземпляр из ресурсов

 private void DigitalClock_StopDigitalClock(object sender, EventArgs e)   {       this.RaiseEvent(new RoutedEventArgs(Clock.StopClockEvent));    }

Imports SystemImports System.IOModule VBDemoSub Main()Dim FileName As String = "c:\temp\mytext01.txt"Dim Writer As StreamWriterDim MyFile As New FileInfo(FileName)Writer = MyFile.CreateText()Writer.WriteLine("Created by"&MyFile.GetType.ToString)Writer.WriteLine("Written by"&Writer.ToString)Writer.Close()End Sub

private void button1_Click(object sender, System.EventArgs e){ manualresetevent=new ManualResetEvent(false); Thread thread1 = new Thread(new ThreadStart(AsynchronProcess1)); //Процесс 1 стартует первым thread1.Start(); Thread thread2 = new Thread(new ThreadStart(AsynchronProcess2)); thread2.Start();Функция AsynchronProcess1

private void button1_Click(object sender, System.EventArgs e){   //Файл создан заранее его объем должен быть достаточно большимstring path = "C:\a.txt"; FileInfo fileinfo=new FileInfo(path);  using(FileStream   fileStream = fileinfo.OpenRead()) {  fileStream.Seek(0, SeekOrigin.Begin);  byte[] bArray=new byte[10];    int iBytes=fileStream.Read(bArray,0,10);    if(iBytes == 10)  {   for(int i=0; i < iBytes; i++)   textBox1.Text+= bArray[i];  }}						

using System;  using System.IO;  using System.IO.Compression; namespace Recipe05_23  {  class Recipe05_23  {  static void Main(string[] args)  {   GZipStream zipout = new GZipStream(  File.OpenWrite("compressed_data.gzip"),  CompressionMode.Compress);  StreamWriter writer = new StreamWriter(zipout);  writer.WriteLine("the quick brown fox");   writer.Close();  GZipStream zipin = new GZipStream(  File.OpenRead("compressed_data.gzip"),  CompressionMode.Decompress);  StreamReader reader = new StreamReader(zipin);  a line from the stream and print it out.  Console.WriteLine(reader.ReadLine());  Console.WriteLine(Environment.NewLine);  Console.WriteLine("Main method complete. Press Enter."); Console.ReadLine(); } } }

Imports System Imports System.IO Imports System.Security.Cryptography Module VBDemo Sub Main()     Dim Bytes() As Byte = {65, 66, 67, 68, 69, 70, 71, 72, 73, 74}     Dim EncBytes() As Byte = New Byte(15) {}     Dim DecBytes() As Byte = New Byte(10) {}     Dim FileName As String = "c:\temp\text.enc"     Dim EncFile As New FileStream(FileName, FileMode.Create, _         FileAccess.Write)     Dim DES As New DESCryptoServiceProvider()     Dim DESEncrypt As ICryptoTransform = DES.CreateEncryptor()     Dim CryptoStreamEnc As New CryptoStream(EncFile, DESEncrypt, _         CryptoStreamMode.Write)     Console.WriteLine("Original Data")     ToHexArray(Bytes)     CryptoStreamEnc.Write(Bytes, 0, Bytes.Length)     CryptoStreamEnc.Close()     EncFile.Close()     EncFile = New FileStream(FileName, FileMode.Open, FileAccess.Read)     EncFile.Read(EncBytes, 0, EncFile.Length)     EncFile.Close()     Console.WriteLine("Encrypted Data")     ToHexArray(EncBytes)     Console.WriteLine()     Dim DecFile As New FileStream(FileName, FileMode.Open, _         FileAccess.Read)     Dim DESDecrypt As ICryptoTransform = DES.CreateDecryptor()     Dim CryptoStreamDec As New CryptoStream(DecFile, DESDecrypt, _         CryptoStreamMode.Read)     Dim Reader As New BinaryReader(CryptoStreamDec)     Console.WriteLine("Decrypted Data")     DecBytes = Reader.ReadBytes(10)     ToHexArray(DecBytes) End Sub Sub ToHexArray(ByVal A As Byte())     Dim I As Integer     For I = 0 To A.GetUpperBound(0)         Console.Write("0x{0:x2} ", A(I))         If I = 7 Then             Console.WriteLine()         End If     Next End Sub End Module

Imports SystemImports System.IOModule VBDemoSub Main()    Dim Bytes As Byte()    Dim Reader As BinaryReader    Dim Writer As BinaryWriter    Reader = New BinaryReader(File.OpenRead (“c:\demo.exe”))    Writer = New BinaryWriter(File.Create (“c:\demo_copy.exe”))    While Reader.PeekChar() > -1        Bytes = Reader.ReadBytes(1024)        Writer.Write(Bytes)    End While    Reader.Close()    Writer.Flush()    Writer.Close()End SubEnd Module

using System.Runtime.Serialization;...[Serializable]public class OrderEntity : ISerializable{  void ISerializable.GetObjectData(SerializationInfo info, StreamingContextctxt)  {    info.AddValue("OrderID", orderID);  }deserialization  public OrderEntity(SerializationInfo info, StreamingContext ctxt)  {        orderID = (int)info.GetValue("OrderID", typeof(int));  }}    

 int minutes, seconds, time;                 public TextBlock Time        {            get            {                minutes = time / 60;                seconds = time % 60;                this.Text = String.Format("{0:00}:{1:D2}", minutes, seconds);                if (time > 0)                    time -= 1;                return this;            }        }

 time = COUNT_TIME * 60;   // Секунды        }            public void Start()        {            timer.Stop();            timer.Start();        }            public void Restart()        {            time = COUNT_TIME * 60;   // Секунды            timer.Stop();            timer.Start();        }            public void StopResult()        {            timer.Stop();            if (StopDigitalClock != null)                StopDigitalClock(this, EventArgs.Empty);        }            public void Stop()        {            timer.Stop();        }

public void Start(){    clock.Start();}public void Restart(){    clock.Restart();}public void StopResult(){    clock.StopResult();}public void Stop(){    clock.Stop();}

Пример кода:  { bArray[i]=(byte)numrandom.Next(48,57);					 textBox1.Text+=bArray[i];}				fileStream.Write(bArray,0,10); 

private void button1_Click(object sender, System.EventArgs e){//Файл создан заранее, его объем должен быть достаточно большим string path = "C:\a.txt"; using(FileStream        fileStream = new FileStream(path, FileMode.Open)) {  fileStream.Seek(1, SeekOrigin.Begin);    for (int i=0;i<fileStream.Length;i++)      textBox1.Text=fileStream.ReadByte()+" ";  }

using System.Runtime.Serialization.Formatters.Binary;...BinaryFormatter formatter = new BinaryFormatter();"MyBinaryOrderEntity.dat"FileStream stream = File.Create("MyBinaryOrderEntity.dat");formatter.Serialize(stream, order);stream.Close();

Imports SystemImports System.IOModule VBDemoSub Main()    Dim FileName As String = _         “C:\Program Files\Microsoft.NET\FrameworkSDK\include\corsym.h”    Dim Reader As TextReader    Dim I As Int32    Reader = New StreamReader(FileName)    While Reader.Peek() > -1        Console.WriteLine(Reader.ReadLine)        I += 1    End While    Console.WriteLine(“Read {0:G} lines”, I)    Reader.Close()End SubEnd Module

StopClockEvent = EventManager.RegisterRoutedEvent(    "StopClock", RoutingStrategy.Bubble,    typeof(RoutedEventHandler), typeof(Clock));

 public event RoutedEventHandler StopClock     {         add { AddHandler(StopClockEvent, value); }         remove { RemoveHandler(StopClockEvent, value); }      }

FileStream sourceFile = File.OpenRead(@"C:\zip.xml"); FileStream destFile = File.Create(@"C:\zip.zip");  GZipStream compStream = new GZipStream(destFile, CompressionMode.Compress);  try {     int value = sourceFile.ReadByte();         while (value!= -1)         {             compStream.WriteByte((byte)value);                 value = sourceFile.ReadByte();         } } finally {     compStream.Dispose(); }

Imports SystemImports System.IOModule VBDemoSub Main()Dim Path As String = "c:\"Dim DirInfo As New DirectoryInfo(Path)Dim Dirs() As DirectoryInfoDim I As IntegerConsole.WriteLine("Initial Directory:"&DirInfo.FullName);Dirs=DirInfo.GetDirectoriesFor I=0 To Dirs.GetUpperBound(0)Console.WriteLine(Dirs(I).FullName)NextEnd SubEnd Module

{        void timer_Tick(object sender, EventArgs e)                    if (PropertyChanged != null)                PropertyChanged(this, new PropertyChangedEventArgs("Time"));                if (minutes <= 0 && seconds <= 0)            {                timer.Stop();                if (StopDigitalClock != null)                    StopDigitalClock(this, EventArgs.Empty);            }   }

Imports SystemImports System.IOModule VBDemoSub Main()Dim Path As String = GetPersonalFolder()&"\MyText"Dim DirInfo As New DirectoryInfo(Path)Dim Parent As StringConsole.WriteLine("Initial Directory : "&DirInfo.FullName)Parent = DirInfo.Parent.FullNameWhile Parent DirInfo.Root.FullNameConsole.WriteLine("Parent Directory : " & _DirInfo.Parent.FullName)Parent = DirInfo.Parent.FullNameDirInfo = New DirectoryInfo(Parent)End WhileEnd SubFunction GetPersonalFolder() As StringDim E As EnvironmentReturn E.GetFolderPath(Environment.SpecialFolder.Personal)End FunctionEnd Module

Imports SystemImports System.IOModule VBDemoSub Main()    Dim Bytes As Byte()    Dim I As Integer    Dim Reader As BinaryReader    Reader = New BinaryReader(File.OpenRead (“c:\demo.exe”))    While Reader.PeekChar() > -1        Bytes = Reader.ReadBytes(16)        For I = 0 To Bytes.GetUpperBound(0)            Console.Write(“0x{0:X2}|”, Bytes(I))        Next        Console.WriteLine()    End WhileEnd SubEnd Module 

private void button1_Click(object sender, System.EventArgs e){ StringBuilder sbText= new StringBuilder("Дом, который построит Джек"); StringBuilder sbText1= new StringBuilder("Пшеница, которая в темном чулане хранилась"); StringBuilder sbText2= new StringBuilder("Кот, который пугал синицу");  StringWriter stringwriter = new StringWriter();       sbText=sbText.Replace("построит","построил"); sbText1=sbText1.Replace("хранилась","хранится"); sbText2=sbText2.Replace("пугал","пугает"); stringwriter.Write(sbText); stringwriter.Write(stringwriter.NewLine); stringwriter.Write(sbText1);			 stringwriter.GetStringBuilder().Insert(sbText.Length+1,sbText2); string path = @"C:\a.txt";using(TextWriter streamWriter = new StreamWriter(path,true,System.Text.Encoding.Default)) {  streamWriter.Write(stringwriter); } stringwriter.Close(); using(TextReader streamreader = new StreamReader(path,System.Text.Encoding.Default)) {  StringReader stringreader = new StringReader(streamreader.ReadToEnd());  textBox1.Text+=stringreader.ReadLine()+"\r\n";  textBox1.Text+=stringreader.ReadLine()+"\r\n";  sbText=new StringBuilder(stringreader.ReadLine());  sbText=sbText.Replace("Кот", "Пес",0,5);  textBox1.Text+=sbText;  stringreader.Close(); }}

timer = new DispatcherTimer();            timer.Tick += new EventHandler(timer_Tick);            timer.Interval = TimeSpan.FromSeconds(1);

  <OrderID>10248</OrderID>  <CustomerID>VINET</CustomerID>  <OrderDate>1996-07-04T00:00:00.0000000+01:00</OrderDate>  <OrderDetails> ... see below ... </OrderDetails>  <ShippedDate>1996-07-16T00:00:00.0000000+01:00</ShippedDate></OrderEntity>

 public event PropertyChangedEventHandler PropertyChanged;

private void button1_Click(object sender, System.EventArgs e){//Файл создан заранее его объем должен быть достаточно большим string path = "C:\a.txt";FileInfo fileinfo=new FileInfo(path);  using(FileStream       fileStream = fileinfo.OpenWrite()) {  fileStream.Seek(0, SeekOrigin.Begin);          byte[] bArray=new byte[10];  Random numrandom = new Random();  for(int i=0; i <bArray.Length; i++)  {   //Записываем случайные числа в массив   bArray[i]=(byte)numrandom.Next(48,57);   fileStream.WriteByte(bArray[i]);   textBox1.Text+=bArray[i];  }				 }}

using System;using System.Text;using System.Net;using System.Net.Sockets;class SocketServer{public static void Main(){StreamWriter streamWriter;StreamReader streamReader;NetworkStream networkStream;TcpListener tcpListener = new TcpListener(5555);tcpListener.Start();Console.WriteLine("The Server has started on port 5555");Socket serverSocket = tcpListener.AcceptSocket();try{if (serverSocket.Connected){while (true){Console.WriteLine("Client connected");networkStream = new NetworkStream(serverSocket);streamWriter = new StreamWriter(networkStream);streamReader = new StreamReader(networkStream);Console.WriteLine(streamReader.ReadLine());}}if (serverSocket.Connected)serverSocket.Close();Console.Read();}catch (SocketException ex){Console.WriteLine(ex);}}}