In the user registration process I want to validate your CPF by JavaScript and return whether it is valid in beckend. And so make a if with this result to insert it in the database or not.
if (ValidaCpf(txtCpf.Text) == False){
//retorna um erro
}
else{
//cadastra o usuário
}
Note: I already have the function to validate the CPF and the Insert User method in the DB. I just need to pass the validation result from JavaScript to C #.
This is a simple example in Jquery for sending cpf.
var cpf = 000000000000
$("button").click(function () {
$.ajax({
url: "/Home/PostJson", //local para onde vai ser enviado
type: "POST", //forma de envio
contentType: "application/json",
data: '{cpf:cpf}', //informação enviada
success: function (data) {
alert(data);
}
});
})
Now looking at the application side
public class HomeController : Controller
{
[HttpPost]
public JsonResult PostJson([FromBody] string cpf)
{
//faz a validação do cpf
return Json(VarResultado, JsonRequestBehavior.AllowGet);
}
}
Send the CPF by JSON to the side of the application, which does the validation and then returns with the result to the screen.