1. Button , Message Box , TextBox and Label control in windows form application
1. For This section , Create new windows form project using C# language2. Add a Button control on Window Form name it "BTN" from properties , also add a textbox and a label any where on the form , give textbox name as "txt" and specify name for label as saquarelbl
3. Double Click Button which created in previous step , now a code window will appear which generate button click event as shown below, just you have to type MessageBox.show() line between { }. in different way as given in sample programs.
4. For Executing programs, press F5 or Ctrl+F5 from keyboard.
Program1: Simple Program to display a message box on button click, No title in title bar of message box.
private void Btn_Click(object sender, EventArgs e)
{
MessageBox.Show("WELCOME TO
C#");
}
Program2:
private void Btn_Click(object sender, EventArgs e)
{
MessageBox.Show("WELCOME TO
C#","Hello");
}
Program3:
private void Btn_Click(object sender, EventArgs e)
{
MessageBox.Show("WELCOME TO
C#","Hello",MessageBoxButtons.YesNoCancel);
}
Program4:
private void Btn_Click(object sender, EventArgs e)
{
MessageBox.Show((12+3).ToString());
}
Program 5: This program creates two variables a and b , with values 12 assigned to each variables and display addition of both variables
private void Btn_Click(object sender, EventArgs e)
{
int a = 12, b = 12;
MessageBox.Show("a+b=\t"+(a+b).ToString());
}
Program 6: This program dispaly message "Button Clicked " in a message box when button clicked.
private void Btn_Click(object sender, EventArgs e)
{
txt1.Text = "Button
clicked";
}
Program 7:
private void Btn_Click(object sender, EventArgs e)
{
String name = "A.Rafay";
txt1.Text = "Hello
!"+name;
}
Program 8: This program shows message box with a message, which you type in textbox and changes text color of text box text to black on button click.
private void Btn_Click(object sender, EventArgs e)
{
txt1.ForeColor = Color.Black;
MessageBox.Show("Hello
!"
+ txt1.Text);
}
Program 9:
private void Btn_Click(object sender, EventArgs e)
{
int n = Int32.Parse(txt1.Text);
int square = n * n;
squarelbl.Text = square.ToString();
}
2. Basic C# Example Programs
This section covers very simple and basic C# Console Application Programs, which includes Simple input output programs , basic variable programs, comments in c# program. For this section follow the following steps :
- Create a new C# Console Application
- C# generate code for you , remove it first then copy and paste following programs one by one. when you copy any program from below list , make sure you have deleted previous program.
- Execute these programs by press F5 or Ctrl+F5
Program 1:
namespace app1
{
class Program
{
static void Main(string[] args)
{
System.Console.WriteLine("Welcome to
C#");
System.Console.WriteLine("Press any
key to exit");
System.Console.ReadKey();
}
}
}
Program 2:
using System;
namespace app1
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Welcome to
C#"); //This is output function whcih display
output result
Console.WriteLine("Press any
key to exit");
Console.ReadKey(); // this is input function
which takes one character from key board
}
}
}
Program 3:
using System;
namespace app1
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Press any
key\n");
char ch =Console.ReadKey().KeyChar;
Console.WriteLine("\n\nYou
Pressed \t" + ch);
Console.ReadKey();
}
}
}
Program 4:
using System;
namespace app1
{
class Prog
{
static void Main(string[] args)
{
Console.ReadKey();
Console.WriteLine("Welcome");
Console.ReadKey();
Console.WriteLine("To");
Console.ReadKey();
Console.WriteLine("C#");
Console.ReadKey();
}
}
}
Program 5:Program to display Rsoft Computer Tutorials each word in key press.
using System;
namespace app1
{
class Prog
{
static void Main(string[] args)
{
Console.ReadKey();
Console.Write(" Rsoft");
Console.ReadKey();
Console.Write(" Computer");
Console.ReadKey();
Console.Write(" Tutorials");
Console.ReadKey();
}
}
}
Program 6: C# Program to display basic calculation
using System;
namespace app1
{
class Prog
{
static void Main(string[] args)
{
Console.WriteLine("5+5=\t" + (5 + 5));
Console.WriteLine("10-3=\t" + (10 - 3));
Console.WriteLine("2*3=\t" + (2 * 3));
Console.WriteLine("12/2=\t" + (12/2));
Console.WriteLine("13%3=\t" + (13 % 3));
Console.ReadKey();
}
}
}
using System;
namespace app1
{
class Prog
{
static void Main(string[] args)
{
int a=12, b=3;
Console.WriteLine("a+b=\t" + (a + b));
Console.ReadKey();
}
}
}
Program 8:
using System;
namespace app1
{
class Prog
{
static void Main(string[] args)
{
int a, b;
Console.WriteLine("Enter Value
for a ");
a = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Enter Value
for b ");
b = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Addition of
a and b is \t"+ (a+b));
Console.ReadKey();
}
}
}
Program 9:
using System;
namespace app1
{
class Prog
{
static void Main(string[] args)
{
int a, b;
Console.WriteLine("Enter Value
for a ");
a = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Enter Value
for b ");
b = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Addition of
{0} and {1} is\t{2}",a,b,a+b);
Console.ReadKey();
}
}
}
Program 10: Program to take your name in a variable "name" and display Hello and name which you type.
using System;
namespace app1
{
class Prog
{
static void Main(string[] args)
{
String name;
Console.WriteLine("Please enter
your name");
name = Console.ReadLine();
Console.WriteLine("Hello
!"
+ name);
Console.ReadKey();
}
}
}
3. Very Simple C# Console Application Programs
This is continuation of previous section , this section covers simple example programs related with input and output, variables and data types, placeholders and sizeof() function
Program 1: declaring variables of type byte
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Simpleapp
{
class Program
{
static void Main(string[] args)
{
byte b1=12;
byte b2 = 10;
Console.WriteLine("The Value of
b1 is\t"
+ b1);
Console.WriteLine("The Value of
b2 is \t"
+ b2);
Console.WriteLine("Addition of
b1 and b2 is \t" + (b1 + b2));
Console.ReadKey();
}
}
}
Program 2: variables of type byte, showing output result through placeholders.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Simpleapp
{
class Program
{
static void Main(string[] args)
{
byte b1=12;
byte b2 = 10;
Console.WriteLine("The Value of
b1 is\t {0}" , b1);
Console.WriteLine("The Value of
b2 is \t {0}" , b2);
Console.WriteLine("Addition of
b1 and b2 is {0} \t" , b1 + b2);
Console.ReadKey();
}
}
}
Program 3:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Simpleapp
{
class Program
{
static void Main(string[] args)
{
String name;
Console.WriteLine("Enter your
name");
name = Console.ReadLine();
Console.WriteLine("Welcome !
{0}",
name);
Console.ReadKey();
}
}
}
Byte Example 1
using System;
namespace Simpleapp
{
class Program
{
static void Main(string[] args)
{
byte b1, b2;
Console.WriteLine("Enter value
1: ");
b1 = Byte.Parse(Console.ReadLine());
Console.WriteLine("Enter Value
2: ");
b2 = Byte.Parse(Console.ReadLine());
Console.WriteLine("{0}+{1}={2}", b1, b2, b1 + b2);
Console.WriteLine("{0}-{1}={2}", b1, b2, b1 - b2);
Console.WriteLine("{0}*{1}={2}", b1, b2, b1 * b2);
Console.WriteLine("{0}/{1}={2}", b1, b2, b1 / b2);
Console.WriteLine("{0}%{1}={2}", b1, b2, b1 % b2);
Console.ReadKey();
}
}
}
byte Data type Example 2
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Simpleapp
{
class Program
{
static void Main(string[] args)
{
byte b=12;
Console.WriteLine("Value of b
is \t {0}", b);
Console.WriteLine("Size of b is
\t {0}",sizeof(byte));
Console.WriteLine("Minimum
Range of byte is\t{0}",Byte.MinValue);
Console.WriteLine("Maximum
Range of byte is \t{0}",Byte.MaxValue);
Console.ReadKey();
}
}
}
4. Type casting in C#
This section contains csharp sample example programs of data type conversion topic, which is also called type casting. You will be able to use Convert methods, int.parse() method and int.tryParse() method.
PROGRAM 1:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Data_TypeConversion
{
class Program
{
static void Main(string[] args)
{
int a, b;
Console.WriteLine("Enter value
1");
a =Convert.ToInt32( Console.ReadLine());
Console.WriteLine("Enter value
2");
b = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("{0}+{1}={2}", a, b, a + b);
Console.ReadKey();
}
}
}
PROGRAM 2:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Data_TypeConversion
{
class Program
{
static void Main(string[] args)
{
int a, b;
Console.WriteLine("Enter value
1");
a = Int32.Parse(Console.ReadLine());
Console.WriteLine("Enter value
2");
b = Int32.Parse(Console.ReadLine());
Console.WriteLine("{0}+{1}={2}", a, b, a + b);
Console.ReadKey();
}
}
}
PROGRAM 3 :
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Data_TypeConversion
{
class Program
{
static void Main(string[] args)
{
Int32 obj = new Int32();
obj = 20;
int var;
var = obj;
Console.WriteLine(var);
Console.ReadKey();
}
}
}
PROGRAM 4:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Data_TypeConversion
{
class Program
{
static void Main(string[] args)
{
Byte b = new Byte();
b = 45;
byte var = b;
Console.WriteLine(var);
Console.ReadKey();
}
}
}
PROGRAM 5:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Data_TypeConversion
{
class Program
{
static void Main(string[] args)
{
char ch;
ch = Console.ReadKey().KeyChar;
Console.WriteLine("\nYou
Pressed\t" + ch);
Console.ReadKey();
}
}
}
PROGRAM 6:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Data_TypeConversion
{
class Program
{
static void Main(string[] args)
{
char ch;
Console.WriteLine("Enter any
character");
ch = Console.ReadKey().KeyChar;
if (Char.IsLetter(ch))
{
Console.WriteLine("\nIt is
Letter");
}
else
Console.WriteLine("\nNot a
letter");
Console.ReadKey();
}
}
}
PROGRAM 7:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Data_TypeConversion
{
class Program
{
static void Main(string[] args)
{
char ch;
Console.WriteLine("Enter any
character");
ch = Console.ReadKey().KeyChar;
if (Char.IsLower(ch))
{
Console.WriteLine("\nLower Case
Letter");
}
else
Console.WriteLine("\n Upper
Case Letter");
Console.ReadKey();
}
}
}
PROGRAM 8:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Data_TypeConversion
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("<<<<<<<<<<<<
WELCOME TO ADVANCED
CALCULATOR>>>>>>>>>>>>");
Console.WriteLine("\t\t<<<<<<<
Made By Aptech Students >>>>>>>>>>");
Console.WriteLine("\t\t????????<<Batech:
IPRO 2015 12 G>>????????\n");
Console.WriteLine("[1]\t
Standard Mode");
Console.WriteLine("[2]\t
Scientific Mode");
Console.WriteLine("[3]\t
Programmer Mode");
Console.WriteLine("[4]\t
Quit");
Console.WriteLine("Enter Your
Choice:");
char choice = Console.ReadKey().KeyChar;
if (choice == '1')
{
Console.Clear();
Console.WriteLine("<<<<<<<Welcome
to Standard Mode of Calculator>>>>>>");
Console.WriteLine("[1]\tAddition");
Console.WriteLine("[2]\tSubtraction");
Console.WriteLine("[3]\tMultiplication");
Console.WriteLine("[4]\tDivision");
Console.WriteLine("[q]\tTo
Quit");
Console.WriteLine("You
Choice:");
char op = Console.ReadKey().KeyChar;
int n1, n2;
if (op == '1')
{
Console.WriteLine("You are now
in Addition Operatiion");
Console.WriteLine("\nEnter
Value 1");
n1 = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("\nEnter
Value 2");
n2 = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("{0}+{1}={2}", n1, n2, n1 + n2);
}
else if (op == '2')
{
Console.WriteLine("You are now
in Subtraction Operatiion");
Console.WriteLine("\nEnter
Value 1");
n1 = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("\nEnter
Value 2");
n2 = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("{0}-{1}={2}", n1, n2, n1 - n2);
}
else if (op == '3')
{
Console.WriteLine("You are now
in Multiplication Operatiion");
Console.WriteLine("\nEnter
Value 1");
n1 = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("\nEnter
Value 2");
n2 = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("{0}*{1}={2}", n1, n2, n1 * n2);
}
else
if (op == '4')
{
Console.WriteLine("You are now
in Divide Operatiion");
Console.WriteLine("\nEnter
Value 1");
n1 = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("\nEnter
Value 2");
n2 = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("{0}/{1}={2}", n1, n2, n1 / n2);
}
else
if (op == 'q')
{
Environment.Exit(0);
}
else
Console.WriteLine("Wrong
Operator");
}
else if (choice == '2')
{
Console.Clear();
Console.WriteLine("<<<<<<<Welcome
to Scientific Mode of Calculator>>>>>>");
Console.WriteLine("[1]\tSin");
Console.WriteLine("[2]\tCos");
Console.WriteLine("[3]\ttan");
Console.WriteLine("[4]\tsquare");
Console.WriteLine("[5]\tCube");
}
else if (choice == '3')
{
Console.Clear();
Console.WriteLine("<<<<<<<Welcome
to Programmer Mode of Calculator>>>>>>");
Console.WriteLine("[1]\tBin");
Console.WriteLine("[2]\tHex");
Console.WriteLine("[3]\tOct");
Console.WriteLine("[4]\tDec");
}
else if (choice == '4')
{
Environment.Exit(0);
}
else
Console.WriteLine("\nWrong
Choice");
Console.ReadKey();
}
}
}
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