Month: February 2011

Binary Data Test

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

public class BinaryDataTest
{
   public static void Main()
   {
      int test1 = 45;
      double test2 = 3.14159;
      int test3 = -1234567890;
      bool test4 = false;
      byte[] data = new byte[1024];
      string output;

      data = BitConverter.GetBytes(test1);
      output = BitConverter.ToString(data);
      Console.WriteLine("test1 = {0}, string = {1}", test1, output);

      data = BitConverter.GetBytes(test2);
      output = BitConverter.ToString(data);
      Console.WriteLine("test2 = {0}, string = {1}", test2, output);

      data = BitConverter.GetBytes(test3);
      output = BitConverter.ToString(data);
      Console.WriteLine("test3 = {0}, string = {1}", test3, output);

      data = BitConverter.GetBytes(test4);
      output = BitConverter.ToString(data);
      Console.WriteLine("test4 = {0}, string = {1}", test4, output);
   }
}

Obtaining the Most Significant or Least Significant Bits of a Number

Posted on by coder
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using System;
using System.Data;


class Class1{
        static void Main(string[] args){
            int number = 25;
            short num = 25;
            Console.WriteLine(GetMSB(number));
            Console.WriteLine(GetConvertMSB(number));
            Console.WriteLine(GetLSB(number));
            Console.WriteLine(GetConvertLSB(number));
            Console.WriteLine(GetMSB(num));
            Console.WriteLine(GetLSB(num));

        }
        public static int GetMSB(int value)
        {
            return (int)(value & 0xFFFF0000);
        }
        public static int GetConvertMSB(int value)
        {
            return (value & Convert.ToInt32("11111111111111110000000000000000", 2));
        }

        public static int GetLSB(int intValue)
        {
            return (intValue & 0x0000FFFF);
        }

        public static int GetConvertLSB(int intValue)
        {
            return (intValue & Convert.ToInt32("11111111111111110000000000000000", 2));
        }
        
        public static int GetMSB(short intValue)
        {
            return (intValue & 0xFF00);
        }

        public static int GetLSB(short intValue)
        {
            return (intValue & 0x00FF);
        }

}

Using the Bitwise Complement Operators with Various Data Types

Posted on by coder
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using System;
using System.Data;


class Class1{
        static void Main(string[] args){
      uint x = 0x01001001;
      uint XComp = ~x;
      Console.WriteLine("~x = " + ~x);

      sbyte B1 = sbyte.MinValue;  
      sbyte B2 = sbyte.MaxValue;
      Console.WriteLine("B1|B2 = " + (((byte)B1|(byte)B2)));

      ushort x2 = 0x00000001;           // Problem
      Console.WriteLine("~x2 = " + ~x2);

      byte y = 1;                       // Problem
      //byte B = ~y;
      Console.WriteLine("~y = " + ~y);

      char x3 = (char)1;               // Problem
      Console.WriteLine("~x3 = " + ~x3);

      sbyte x5 = 1;
      Console.WriteLine("~x5 = " + ~x5);
      
      uint IntResult = (uint)~x;
      Console.WriteLine("IntResult = " + IntResult);
      
      byte ByteResult = (byte)~y;
      Console.WriteLine("ByteResult = " + ByteResult);
        }

}

.NET Frameworks Overview:Custom Object Formatting

Posted on by coder
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using System;
class Employee: IFormattable
{
    public Employee(int id, string firstName, string lastName)
    {
        this.id = id;
        this.firstName = firstName;
        this.lastName = lastName;
    }
    public string ToString (string format, IFormatProvider fp) 
    {
        if ((format != null) && (format.Equals("F")))
        return(String.Format("{0}: {1}, {2}", 
        id, lastName, firstName));
        else
        return(id.ToString(format, fp));
    }
    int    id;
    string    firstName;
    string    lastName;
}
public class CustomObjectFormatting
{
    public static void Main()
    {
        Employee fred = new Employee(123, "AAA", "BBB");
        Console.WriteLine("No format: {0}", fred);
        Console.WriteLine("Full format: {0:F}", fred);
    }
}

Overriding the ToString() Method

Posted on by coder
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using System;
   
public class Name {
  public string firstName;
  public string lastName;
   
  public Name(string firstName, string lastName) {
    this.firstName = firstName;
    this.lastName = lastName;
  }
   
  public void Display() {
    Console.WriteLine("firstName = " + firstName);
    Console.WriteLine("lastName = " + lastName);
  }
   
  // override the ToString() method
  public override string ToString() {
    return firstName + " " + lastName;
  }
}

class Test{
  public static void Main() {
    Name myName = new Name("T", "M");
    Name myOtherName = new Name("P", "B");
   
    // call the ToString() method for the Name objects
    Console.WriteLine("myName.ToString() = " + myName.ToString());
    Console.WriteLine("myOtherName.ToString() = " + myOtherName.ToString());
  }
}

Format data in ToString method.

Posted on by coder
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using System;

public class Time1
{
private int hour;
private int minute;
private int second;

public void SetTime( int h, int m, int s )
{
hour = ( ( h >= 0 && h < 24 ) ? h : 0 ); minute = ( ( m >= 0 && m < 60 ) ? m : 0 ); second = ( ( s >= 0 && s < 60 ) ? s : 0 ); } public string ToUniversalString() { return string.Format( "{0:D2}:{1:D2}:{2:D2}", hour, minute, second ); } public override string ToString() { return string.Format( "{0:D2}:{1:D2}:{2:D2} {3}", ( ( hour == 0 || hour == 12 ) ? 12 : hour % 12 ), minute, second, ( hour < 12 ? "AM" : "PM" ) ); } } public class MemberAccessTest { public static void Main( string[] args ) { Time1 time = new Time1(); time.hour = 7; // error: hour has private access in Time1 time.minute = 15; // error: minute has private access in Time1 time.second = 30; // error: second has private access in Time1 } } [/csharp]

class declaration maintains the time in 24-hour format and ToString Method

Posted on by coder
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using System;

public class Time1
{
private int hour; // 0 – 23
private int minute; // 0 – 59
private int second; // 0 – 59

public void SetTime( int h, int m, int s )
{
hour = ( ( h >= 0 && h < 24 ) ? h : 0 ); minute = ( ( m >= 0 && m < 60 ) ? m : 0 ); second = ( ( s >= 0 && s < 60 ) ? s : 0 ); } public string ToUniversalString() { return string.Format( "{0:D2}:{1:D2}:{2:D2}", hour, minute, second ); } public override string ToString() { return string.Format( "{0}:{1:D2}:{2:D2} {3}", ( ( hour == 0 || hour == 12 ) ? 12 : hour % 12 ), minute, second, ( hour < 12 ? "AM" : "PM" ) ); } } public class Time1Test { public static void Main( string[] args ) { Time1 time = new Time1(); Console.WriteLine( time.ToUniversalString() ); Console.WriteLine( time.ToString() ); time.SetTime( 13, 27, 6 ); Console.WriteLine( time.ToUniversalString() ); Console.WriteLine( time.ToString() ); time.SetTime( 99, 99, 99 ); Console.WriteLine( time.ToUniversalString() ); Console.WriteLine( time.ToString() ); } } [/csharp]