how i make a condition with ajax and asp mvc - ajax

Question

I want to put a condition if the user want to add a second appointment he receives an alert
function SaveEvent(data) {
$.ajax({
type: "POST",
url: '/home/SaveEvent',
data: data,
success: function (data) {
if (data.status) {
//Refresh the calender
FetchEventAndRenderCalendar();
$('#myModalSave').modal('hide');
}
},
error: function () {
alert('Failed');
}
})
}
})
this is my code in controller :
public JsonResult SaveEvent(Event e)
{
var status = false;
if (e.EventID > 0)
{
//Update the event
var v = db.Events.Where(a => a.EventID == e.EventID).FirstOrDefault();
if (v != null)
{
v.EventTitle = e.EventTitle;
v.StartDate = e.StartDate;
v.EndDate = e.EndDate;
v.EventDescription = e.EventDescription;
v.EventID = e.EventID;
v.ThemeColor = e.ThemeColor;
}
else
db.Events.Add(e);
db.SaveChanges();
status = true;
}
i want to make the user add one time his event and receive an alert i try but not work

Answer 1

I think i can help:
if(Session["appointment"] != "ok")<>
{
if (e.EventID > 0)
{
//Update the event
var v = db.Events.Where(a => a.EventID == e.EventID).FirstOrDefault();
if (v != null)
{
v.EventTitle = e.EventTitle;
v.StartDate = e.StartDate;
v.EndDate = e.EndDate;
v.EventDescription = e.EventDescription;
v.EventID = e.EventID;
v.ThemeColor = e.ThemeColor;
}
else
db.Events.Add(e);
db.SaveChanges();
Session["appointment"] = "ok";
return JSON(new{appointment="ok"});
}
}else
{
return JSON(new {appointment="no-good");
}
and controller:
function SaveEvent(data)
{
$.ajax({
type: "POST",
url: '/home/SaveEvent',
data: data,
success: function(data) {
if (data.appointment == "ok")
{
//Refresh the calender
FetchEventAndRenderCalendar();
$('#myModalSave').modal('hide');
}
else { your msg error here }
},
error: function() {
alert('Failed');
}
})
}
})
dont not forget Session.Clear();
as the user logs out