i need to call a csharp(code benind ) function using js

Question

i have a csharp method which is updating  the database and it should be called in javascript function .

 this is code behind 

public void storeprogress()

{

con.Open();

cmd.CommandText = "update mytable  set Progress='" + progress + "' where [Registered]='" +DropDownList1.SelectedValue.ToString() + "'and [EmployeID]='" + Label1.Text.ToString() + "' ";

cmd.Connection = con;

cmd.ExecuteNonQuery();

con.Close();

}

 

and js

function InsertProgress() {

$.ajax({

type: "POST",

url: 'NewVideosPage.aspx/storeprogress',

data: "",

contentType: "application/json; charset=utf-8",

dataType: "json",

success: function (msg) {

alert("I am working ");

},

error: function (e) {

alert("Something Wrong.");

}

});

}