Practical 1

Write C# code to display the asterisk pattern.

using System;

namespace Practical1
{
class Program
{
static void Main(string[] args)
{
string opt = "Yes";
while (opt == "yes" || opt == "Yes")
{
Console.Clear();
Console.WriteLine("1.Square Pattern");
Console.WriteLine("2.Triangle Pattern");
Console.Write("Enter Your Pattern:");
string input = Console.ReadLine();
Console.Write("Enter Your Pattern Size:");
int n = Convert.ToInt32(Console.ReadLine());
if (input == "Square" || input == "square")
{
for (int i = 0; i < n; i++)
{
for (int j = 0; j < n; j++)
{
Console.Write("*");
}
Console.Write("\n");
}
}
else if (input == "Triangle" || input == "triangle")
{
for (int i = 0; i < n; i++)
{
for (int j = 0; j <= i; j++)
{
Console.Write("*");
}
Console.Write("\n");
}
}
else
Console.WriteLine("Enter Correct Option!!");
Console.Write("Do You Wanna Do It Again (Yes/No):");
opt = Console.ReadLine();
}
}

}
}

1 
 
Output :

2 
 
 Practical 2
Write C# code to prompt a user to input his/her name and
country name.
using System;
namespace Practical2
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello");
string name, country;
Console.Write("Enter your name");
name = Console.ReadLine();
Console.Write("Enter your country");
country = Console.ReadLine();
Console.Write("{0} is from {1}", name , country);
Console.ReadKey();
}
}
}
Output :

3 
 
 Practical 3
Write C# Program to Convert Digits to Words.
using System;

namespace Practical3
{
class Program
{
static void Main(string[] args)
{
Console.Write("Enter your no. :");
String input = Console.ReadLine();
string[] dict = { "Zero", "One", "Two", "Three", "Four", "Five", .
"Six","Seven","Eight", "Nine" };
string result = "";
for (int i=0;i<input.Length;i++)
{
int c = Convert.ToInt32(input[i])-48;
result += dict[c];
result += " ";
}
Console.WriteLine("{0} in Words Is {1}",input,result);
}
}
}

Output:

4 
 
 Practical 4
Write C# code to convert Following:-
1. To Convert Decimal To Binary No

2. To Convert Binary To Decimal No.

3. To Convert Decimal To HexaDecimal No.

4. To Convert HexaDecimal To Binary No.

using System;

namespace pratical4
{
class Program
{
static string DecToBinary(int a)
{
string k = "";
while (a >= 1)
{
int r = a % 2;
a = a / 2;
k += r;

}
string l = "";
for (int i = k.Length - 1; i >= 0; i--)
{
l += k[i];
}
return l;
}
static int BinToDecimal(int a)
{
int sum = 0,i=0;
while (a >= 1)
{
int r = a % 10;
sum += r * Convert.ToInt32(Math.Pow(2, i));
a = a / 10;
i++;

}
return sum;

}
static String DecToHexaDecimal(int a)
{
string k = "";
while (a >= 1)
{
int r = a % 16;
if (r == 10)
{
k += 'A';
a /= 16;
continue;

5 
 
 }
if (r == 11)
{
k += 'B';
a /= 16;
continue;

}
if (r == 12)
{
k += 'C';
a /= 16;
continue;

if (r == 13)
{
k += 'D';
a /= 16;
continue;

}
if (r == 14)
{
k += 'E';
a /= 16;
continue;

}
if (r == 15)
{
k += 'F';
a /= 16;
continue;

}
a = a / 16;
k += r;

}
string l = "";
for (int i = k.Length - 1; i >= 0; i--)
{
l += k[i];
}0
return l;
}
static int HexToDecimal(String a)
{
int sum = 0, j = 0;
for(int i=a.Length-1;i>=0;i-- )
{ if(a[i]=='A'||a[i]=='a')
{
sum += 10 * Convert.ToInt32(Math.Pow(16, j));
}
else if (a[i] == 'B' || a[i] == 'b')
{
sum += 11 * Convert.ToInt32(Math.Pow(16, j));
}
else if (a[i] == 'C' || a[i] == 'c')

6 
 
 {
sum += 12 * Convert.ToInt32(Math.Pow(16, j));
}
else if (a[i] == 'D' || a[i] == 'd')
{
sum += 13 * Convert.ToInt32(Math.Pow(16, j));
}
else if (a[i] == 'E' || a[i] == 'e')
{
sum += 14 * Convert.ToInt32(Math.Pow(16, j));
}
else if (a[i] == 'F' || a[i] == 'f')
{
sum += 15 * Convert.ToInt32(Math.Pow(16, j));
}
else
{
int k = Convert.ToInt32(a[i]);
sum +=(k-48)* Convert.ToInt32(Math.Pow(16, j));
}
j++;

}
return sum;
}
static void Main(string[] args)
{
String ans = "Yes";
while (ans == "Yes" || ans == "yes")
{
Console.Clear();
Console.WriteLine("1.To Convert Decimal To Binary No.");
Console.WriteLine("2.To Convert Binary To Decimal No.");
Console.WriteLine("3.To Convert Decimal To HexaDecimal No.");
Console.WriteLine("4.To Convert HexaDecimal To Binary No.");
Console.WriteLine("5.Exit");
Console.Write("Enter your Option(1-5):");
int opt = Convert.ToInt32(Console.ReadLine());

switch (opt)
{
case 1:
Console.Write("Enter Your No. in Decimal:");
int num = Convert.ToInt32(Console.ReadLine());
string res = DecToBinary(num);
Console.WriteLine("{0} in Binary Is {1}", num, res);
break;
case 2:
Console.Write("Enter Your No. in Binary:");
int num1 = Convert.ToInt32(Console.ReadLine());
int res1 = BinToDecimal(num1);
Console.WriteLine("{0} in Decimal Is {1}", num1, res1);
break;
case 3:
Console.Write("Enter Your No. in Decimal:");
int num2 = Convert.ToInt32(Console.ReadLine());
String res2 = DecToHexaDecimal(num2);
Console.WriteLine("{0} in HexaDecimal Is {1}", num2, res2);
break;
case 4:
Console.Write("Enter Your No. in HexaDecimal:");
String s = Console.ReadLine();
int res3 = HexToDecimal(s);

7 
 
 Console.WriteLine("{0} in Decimal Is {1}", s, res3);
break;
case 5:
System.Environment.Exit(0);
break;
default:
Console.Write("Enter Correct Option (1-5):");
break;
}
Console.WriteLine("Do You Wanna Calculate again?");
ans = Console.ReadLine();
}
}
}
}

Output :

8 
 
 9 
 
 Practical 5
Write C# code to Convert Infix to Postfix.
using System;

namespace Practical5
{
class Program
{
static int preference(char a)
{ if (a == '^')
return 3;
else if (a == '/' || a == '*')
return 2;
else if (a == '+' || a == '-')
return 1;
else
return 0;

}
static void Main(string[] args)
{
Console.Write("Enter Your Infix Statement :");
string Infix =Console.ReadLine();
Infix += ')';
string Postfix = "";
char[] Stack = new char[Infix.Length];
int top = 0;
Stack[top] = '(';
for(int i=0;i<Infix.Length;i++)
{ if (Infix[i]=='(')
{ top++;
Stack[top] = Infix[i];

}
else if(Infix[i]== '^'||Infix[i]=='/' ||Infix[i]=='*'||Infix[i]=='+'||Infix[i]=='-' )
{
int a = preference(Infix[i]);
int b = preference(Stack[top]);
top++;
Stack[top] = Infix[i];
if (a<=b)
{ while(preference(Stack[top])<=preference(Stack[top-1]))
{
Postfix += Stack[top - 1];
Stack[top - 1] = Stack[top];
top--;
}
}
}
else if (Infix[i]==')')
{
while(true)
{
Postfix += Stack[top];
top--;
if(Stack[top]=='(')
{
top--;
break;

10 
 
 }
}
}
else
{
Postfix += Infix[i];
}
}
Console.WriteLine("Your Postfix Statement:{0}",Postfix);
}
}
}

Output :

11 
 
 Practical 6
Write C# code to Perform Currency Conversions.
1. To Convert Dollar To Rupee.

2. To Convert Euro To Rupee.

3. To Convert Franc To Rupee.

using System;

namespace Practical6
{
class Program
{
static Double DollarToRupee(Double a)
{
Double b = a * 71.84;
return b;

}
static Double EuroToRupee(Double a)
{
Double b = a * 79.08;
return b;
}
static Double FrancToRupee(Double a)
{
Double b = a * 72.42;
return b;
}
static void Main(string[] args)
{
String ans = "Yes";
while (ans == "Yes" || ans == "yes")
{
Console.Clear();
Console.WriteLine("1.To Convert Dollar To Rupee");
Console.WriteLine("2.To Convert Euro To Rupee");
Console.WriteLine("3.To Convert Franc To Rupee");
Console.WriteLine("4.Exit");
Console.Write("Enter your Option(1-4):");
int opt = Convert.ToInt32(Console.ReadLine());

switch (opt)
{
case 1:
Console.Write("Enter Your Amount in Dollar:");
Double num = Convert.ToDouble(Console.ReadLine());
double res = DollarToRupee(num);
Console.WriteLine("${0} in Rupee Is {1}INR", num, res);
break;
case 2:
Console.Write("Enter Your Amount in Euro:");
Double num1 = Convert.ToDouble(Console.ReadLine());
Double res1 = EuroToRupee(num1);
Console.WriteLine("£{0} in Rupee Is {1}INR", num1, res1);

12 
 
 break;
case 3:
Console.Write("Enter Your Amount in Franc:");
Double num2 = Convert.ToDouble(Console.ReadLine());
Double res2 = FrancToRupee(num2);
Console.WriteLine("Fr.{0} in Rupee Is {1}INR", num2, res2);
break;
case 4:
System.Environment.Exit(0);
break;
default:
Console.Write("Enter Correct Option (1-4):");
break;
}
Console.WriteLine("Do You Wanna Calculate again?");
ans = Console.ReadLine();
}
}
}
}

Output :

13 
 
 Practical 7
Write C# Program to perform Temperature Conversion.
1. To Convert Celsius To Fahrenheit.

2. To Convert Fahrenheit To Celsius.

using System;

namespace Practical3
{
class Program
{

static float CelToFahr(float a)

{
float k;
k =((a * 9) / 5) + 32;
return k;
}
static float FahrToCel(float a)
{
float k;
k = ((a - 32) * 5) / 9;
return k;
}
static void Main(string[] args)
{
String ans = "Yes";
while (ans == "Yes" || ans == "yes")
{
Console.Clear();
Console.WriteLine("1.To Convert Celsius To Fahrenheit");
Console.WriteLine("2.To Convert Fahrenheit To Celsius");
Console.WriteLine("3.Exit");
Console.Write("Enter your Option(1-3):");
int opt = Convert.ToInt32(Console.ReadLine());

switch (opt)
{
case 1:
Console.Write("Enter Temperature in Celsius:");
float num = Convert.ToInt32(Console.ReadLine());
float res = CelToFahr(num);
Console.WriteLine("{0} in Fahrenheit Is {1}°F", num, res);
break;
case 2:
Console.Write("Enter Temperature in Fahrenheit:");
float num1 = Convert.ToInt32(Console.ReadLine());
float res1 = FahrToCel(num1);
Console.WriteLine("{0} in Celsius Is {1}°C", num1, res1);
break;
case 3:
System.Environment.Exit(0);
break;
default:
Console.Write("Enter Correct Option (1-3):");

14 
 
 break;
}
Console.WriteLine("Do You Wanna Calculate again?");
ans = Console.ReadLine();
}
}
}
}

Output :

15 
 
 Practical 8
Write C# Program to Create a Windows Form.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApp2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)

{

}
private void button1_Click(object sender, EventArgs e)
{
MessageBox.Show("Successfully Updated!");
}
private void label2_Click(object sender, EventArgs e)
{

private void textBox3_TextChanged(object sender, EventArgs e)

{

private void label1_Click(object sender, EventArgs e)

{

}
private void textBox1_TextChanged(object sender, EventArgs e)
{

private void textBox2_TextChanged(object sender, EventArgs e)

{

}
private void label3_Click(object sender, EventArgs e)
{

}
}
}

16 
 
Output :

17 
 
 Practical 9
Write ASP.NET Program to increase or decrease font size
programmatically.
using System;
using System.Web.UI.WebControls;

namespace WebApplication2
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
Label1.Font.Size = FontUnit.XLarge;
}
}
}

Output :

18 
 
 Practical 10
Write ASP.NET Program to change colour of label text 
control programmatically. 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WebApplication3
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
Label1.ForeColor = System.Drawing.Color.IndianRed;
}
}
}

Output :

19 
 
 Practical 11
Write ASP.NET Program to enable‐disable textbox and 
change width of textbox programmatically
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WebApplication5
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
TextBox1.Enabled = true;
}
protected void Button2_Click(object sender, EventArgs e)
{
TextBox1.Enabled = false;
}
protected void Button3_Click(object sender, EventArgs e)
{
TextBox1.Width = 500;
}
}
}

Output :

20