After Insert the record at index.aspx page redirect to ajax

Question

 After Insert the record at index.aspx page redirect to ajax success function and show the message alert("success"); I wrote function addProject() to do the task.i didn't get any error. record is added successfully in the database. but alert("success") message is not displayed.i tried the code below

 error displayed an object reference is required for non-static field,method error was displayed

 this lines get error

string fname = Request.Form["fname"];

string age = Request.Form["age"]

 

 

public static string doSomething(int id)

{

string fname = Request.Form["fname"];

string age = Request.Form["age"];

string sql = "insert into record values('" + fname + "','" + age + "')";

SqlCommand cmd = new SqlCommand(sql, con);

con.Open();

cmd.ExecuteNonQuery();

con.Close();

return "Sucess";

}

 

 Ajax

 

function addProject() {

$.ajax({

type: 'POST',

url: 'insert.aspx/doSomething',

dataType: 'JSON',

data: {fname: $('#fname').val(), age: $('#age').val()},

success: function (data) {

alert("success");

},

error: function (xhr, status, error) {

console.log(xhr.responseText);

}

});

}