how to write the code in class file in asp.net using c#

Send SMS page as follows

In send sms page gridview as follows

student id      Mobileno

  1            9841578900

 2             9845012121

 3             9845120120

 4             9878875452

 5             9845421445

Textbox1 as follows

Dear candidate, your course reporting timing is 8.30hrs.
Submit (Button)

Certificate details page as follows

Student id Mobileno

11 9845078905

21 9788788888

31 9789045678

41 9789045689

51 9845054564

Textbox2 as follows

Dear candidate, your certificate details has been approved.
Submit (Button)

I have one class file as follows

In that class i want to write the code.
When i click the submit button in Send SMS and Certificate details page
records have to be saved in track table.

In track table i want to save record as follows

Studentid Mobileno Message

 1            9841578900          Dear candidate, your course reporting timing is 8.30hrs.

 2             9845012121       Dear candidate, your course reporting timing is 8.30hrs.

 3             9845120120         Dear candidate, your course reporting timing is 8.30hrs.

 4             9878875452        Dear candidate, your course reporting timing is 8.30hrs.

 5             9845421445        Dear candidate, your course reporting timing is 8.30hrs.

       11                       9845078905   Dear candidate, your certificate details has been approved.
 
        21                      9788788888    Dear candidate, your certificate details has been approved.
          
     31                      9789045678 Dear candidate, your certificate details has been approved.
 
     41                      9789045689  Dear candidate, your certificate details has been approved.
 
    51                      9845054564  Dear candidate, your certificate details has been approved.

for that inserting the record in track table i want to write the code in class file.

pass the parameter in send sms and certificate details page.

for that how can i do in asp.net using c#.