File pointer move and read binary file

Posted on by coder
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using System;
using System.IO;
using System.Text;

class Class1{
  static void Main(string[] args)  {
         byte[] byData = new byte[100];
         char[] charData = new Char[100];

         try {
            FileStream aFile = new FileStream("practice.txt",FileMode.Open);
            aFile.Seek(55,SeekOrigin.Begin);
            aFile.Read(byData,0,100);
         }
         catch(IOException e)
         {
            Console.WriteLine("An IO exception has been thrown!");
            Console.WriteLine(e.ToString());
            Console.ReadLine();
            return;
         }

         Decoder d = Encoding.UTF8.GetDecoder();
         d.GetChars(byData, 0, byData.Length, charData, 0);

         Console.WriteLine(charData);
         return;
  }
}

Working with the BinaryReader Class

Posted on by coder
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using System;
using System.IO;
   
class MainClass {
    static public void Main() {
        FileStream    BinaryFile = new FileStream("test.dat", FileMode.Create, FileAccess.ReadWrite);
        BinaryReader  Reader = new BinaryReader(BinaryFile);
        BinaryWriter  Writer = new BinaryWriter(BinaryFile);
        
        Writer.Write('a');
        Writer.Write(123);
        Writer.Write(456.789);
        Writer.Write("test string");

        char   ReadCharacter;
        double ReadDouble;
        int    ReadInteger;
        string ReadString;
        
        BinaryFile.Seek(0, SeekOrigin.Begin);
        ReadCharacter = Reader.ReadChar();
        ReadInteger = Reader.ReadInt32();
        ReadDouble = Reader.ReadDouble();
        ReadString = Reader.ReadString();
   
        Console.WriteLine("Character: {0}", ReadCharacter);
        Console.WriteLine("Integer: {0}", ReadInteger);
        Console.WriteLine("Double: {0}", ReadDouble);
        Console.WriteLine("String: {0}", ReadString);
    }
}

Working with the BinaryWriter Class

Posted on by coder
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using System;
using System.IO;
   
class MainClass
{
    static public void Main()
    {
     FileStream BinaryFile = new FileStream("test.dat", FileMode.Create, FileAccess.ReadWrite);
     BinaryWriter  Writer = new BinaryWriter(BinaryFile);

     Writer.Write('a');
     Writer.Write(123);
     Writer.Write(456.789);
     Writer.Write("test string");
    }
}

Obtaining Restricted Elements Without Reaching While Ordering and Using Query Expression Syntax

Posted on by coder
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using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.Xml.Linq;
public class MainClass {
    public static void Main() {
        XDocument xDocument = new XDocument(
          new XElement("Books",
            new XElement("Book",
              new XAttribute("type", "Author"),
              new XElement("FirstName", "A"),
              new XElement("LastName", "B")),
           new XElement("Book",
             new XAttribute("type", "Author"),
             new XElement("FirstName", "C"),
             new XElement("LastName", "D"))));

        IEnumerable<XElement> elements =
          from e in xDocument.Descendants("Book")
          where ((string)e.Attribute("type")) != "Illustrator"
          orderby ((string)e.Element("LastName"))
          select e;

        foreach (XElement element in elements) {
            Console.WriteLine("Element: {0} : value = {1}",element.Name, element.Value);
        }
    }
}

Obtaining Restricted Elements Without Reaching

Posted on by coder
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using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.Xml.Linq;
public class MainClass {
    public static void Main() {
        XDocument xDocument = new XDocument(
          new XElement("Books",
            new XElement("Book",
              new XAttribute("type", "Author"),
              new XElement("FirstName", "A"),
              new XElement("LastName", "B")),

          new XElement("Book",
            new XAttribute("type", "Author"),
            new XElement("FirstName", "C"),
            new XElement("LastName", "D"))));

        IEnumerable<XElement> elements = xDocument.Descendants("Book")
           .Where(e => ((string)e.Element("FirstName")) == "C");
        foreach (XElement element in elements) {
            Console.WriteLine("Element: {0} : value = {1}",element.Name, element.Value);
        }
    }
}

Obtaining Elements Without Reaching

Posted on by coder
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using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.Xml.Linq;
public class MainClass {
    public static void Main() {
        XDocument xDocument = new XDocument(
          new XElement("Books",
          new XElement("Book",
          new XAttribute("type", "Author"),
          new XElement("FirstName", "A"),
          new XElement("LastName", "B")),
          new XElement("Book",
          new XAttribute("type", "Author"),
          new XElement("FirstName", "C"),
          new XElement("LastName", "D"))));
        IEnumerable<XElement> elements = xDocument.Descendants("Book");
        foreach (XElement element in elements) {
            Console.WriteLine("Element: {0} : value = {1}",element.Name, element.Value);
        }
    }
}

Adding a Node to the End of the Specified Node's Child Nodes with Add

Posted on by coder
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using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.Xml.Linq;
public class MainClass {
    public static void Main() {
        XDocument xDocument = new XDocument(
          new XElement("Books",
            new XElement("Book",
              new XAttribute("type", "Author"),
              new XElement("FirstName", "J"),
              new XElement("LastName", "R"))));

        xDocument.Element("Books").Add(
          new XElement("Book",
            new XAttribute("type", "Author"),
            new XElement("FirstName", "E"),
            new XElement("LastName", "B")));

        Console.WriteLine(xDocument);
    }
}