Error handling in Classic ASP was not the best. ASP.NET has a new error handling mechanism which was already in other languages such as C, C++ and JAVA. It is called the try...catch mechanism, which is also known as "Exception Handling".

This article provides insight about exception handling on the basis of ASP.NET and C# as code behind.

In order to send email attachements from a form, we first upload the file to a temporary location on the server. We then attach the file to the email message, execute the mail message to sent he email and finally delete the file from the temporary location.

Please follow the following steps to add attchment funtionality to you Asp.Net form using C#.

The following code prints hello world and numbers from 1 to 11

Following is the source code for math functions Absolute Value, Sin, Cos, Tan, and ArcTan:

#include <math.h>
main()
{
        printf("%d %d\n",abs(-4),abs(5));
        printf("%f %f %f\n",sin(1/6.0*M_PI),cos(1/6.0*M_PI),tan(1/6.0*M_PI));
        printf("%f\n",atan(0.5)*180/M_PI);
}

Following is the source code for math functions Log10, Floor, Round, Power, and Square Root:

#include <math.h>
main()
{
        printf("%f %f\n",log10(64)/log10(2),pow(32,0.2));
        printf("%f %f\n",floor(6.6),rint(6.6));
        printf("%f\n",pow(12,3));
        printf("%f\n",sqrt(25));
}

Following is the source code for calculating the factorial of a number using a For Loop in C Programming.

Following is the source code for calculating the factorial of a number using a DO WHILE Loop in C Programming.

main()
{
  int a,b,i;
  printf("Enter a number between 0 and 33: ");
  scanf("%d",&i);
  b=1;
  a=1;
  if(i>=1)
  do
  { b*=a;
    a++;
  }while(a<=i);
   printf("%d\n",b);
}

Following is the source code for calculating the factorial of a number using a Recursive Function in C Programming.

int f(int n)
{
  if (n==0)
    return 1;
  if (n>0)
    return n*f(n-1);
}
main()
{
  int n;
  printf("Enter a number between 0 and 33: ");
  scanf("%d",&n);
  printf("%d\n",f(n));
}

Following is the source code for calculating the factorial of a number using a WHILE Loop in C Programming.

main()
{
  int a,b;
  printf("Enter a number between 0 and 33: ");
  scanf("%d",&a);
  b=1;
  while(a>=1)
   { b*=a;
     a--;
   }
  printf("%d\n",b);
}

Following source code will change any number in base 10 to base 2 or binary in C Programming.

void printit(int num)
{
 if (num)
 {
  int rem = num%2;
  printit(num/2);
  putchar('0'+rem);
 }
}
main()
{
 int num;
 printf("Enter a number: ");
 scanf("%d", &num);
 printit(num);
 printf(" base 2\n");
}