AJAX sends date in data but C# controller does not contain data

Question

I came accross weird behaviour in my MVC site sending ajax request. I have following call in one of funcitons:

$.ajax ({
    data: JSON.stringify({event_id: params.eventId, start_date: params.startDate}),
    type: "POST",
    async: false,
    contentType: "application/json; charset=utf-8",
    url: '@Url.Action("RandomFunction")',
    success: function(return string) {
        //DoSomeStuff
    }
});

Then there is this function in controller:

[HttpPost]
public ActionResult RandomFunction(int eventId = 1, string startDate = "")
{
    if (startDate == string.Empty) {
        //Handle missing date
    }

    //DoSomeMagic
}

Google Chrome's Developer tool shows that required data were sent via post request.

Request Payload:
event_id: "1"
start_date: "2015-06-08T22:00:00.000Z"

But once it reaches RandomFunction, startDate string is set to empty string instead of date that was sent via request and code ends up in Handle missing date section

Am I doing something wrong? I can't figure it out for a while.

Answer 1

This example works for me:

$.ajax ({
    data: {
        eventId: params.eventId, 
        startDate: params.startDate
    },
    type: "POST",
    async: false,
    contentType: "application/json; charset=utf-8",
    url: '@Url.Action("RandomFunction")',
    success: function(return string) {
        //DoSomeStuff
    }
});

And C# code:

[HttpPost]
public ActionResult RandomFunction(int eventId, string startDate)
{
    if (startDate == string.Empty) {
        //Handle missing date
    }

    //DoSomeMagic
}

Answer 2

Try This, Your passing parameter name and Receiving Para Name in controller are different so.. make them same..

[HttpPost]
public ActionResult RandomFunction(int event_id= 1, string start_date= "")
{
    if (start_date== string.Empty) {
        //Handle missing date
    }

    //DoSomeMagic
}

Regards,

Answer 3

I would expect your problem is due to the use of JSON.stringify there is a difference between

"{event_id: 1, start_date: \"2015-06-08T22:00:00.000Z\"}"

which is just a string, and

{event_id: 1, start_date: "2015-06-08T22:00:00.000Z"}

which is a JObject that the MVC framework can parse.

Also make sure that the names in the JSON match the names of the arguments