Passing data with ajax and read it with Request.Form[""]

Question

I try to pass parameters into aspx.cs page from js script. When I omit:

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

in ajax request I get by Request.Form["ORDER"] sth like {%7b%22ORDER_ID%22%3a126333%7d}. It means that this data comes to aspx.cs, but it is not decoded.

When I add contentType I get nothing in request.

Below I attach request.

It is important to read parameters from Request.Form["ORDER"] in aspx.cs;

$.ajax({
        type: 'POST',
        contentType: "application/json; charset=utf-8",
        data: JSON.stringify({ ORDER_ID: orderKeyId }),
        dataType: "json",
        url: sUrl,
        success: function (data) {
            var s = 0;
        },
        error: function () {
            var s = 0;
        }
    });

WebForms is designed to work with form-urlencoded data by default, not JSON. If you want to use JSON you'll need to deserialise it from the `Request` object manually, or write your own model binder. — Rory McCrossan, Aug 21 '18 at 10:51
@Ameya Deshpande It is just simple PageLoad and then (Request.Form["ORDER_ID"] — gorrch, Aug 21 '18 at 11:09
@Rory McCrossan I do not need to use JSON. I just need to read it from Request.Form, not Request.QueryString — gorrch, Aug 21 '18 at 11:10
That's what you're already doing. The problem is purely because you're sending JSON. — Rory McCrossan, Aug 21 '18 at 11:14
Possible duplicate of [How to send a JSON object using html form data](https://stackoverflow.com/questions/22195065/how-to-send-a-json-object-using-html-form-data) — Daniel B, Aug 23 '18 at 03:50

score 0 · Accepted Answer · answered Aug 21 '18 at 11:18

According to @Rory McCrossan comment, below ajax state worked:

$.ajax({
    type: 'POST',
    contentType: "application/x-www-form-urlencoded",
    data: "ORDER_ID=" + encodeURIComponent(orderKeyId),
    url: sUrl,
    success: function (data) {
        var s = 0;
    },
    error: function () {
        var s = 0;
    }
});

Passing data with ajax and read it with Request.Form[""]

1 Answers1