How to retrieve JSON via ASP.Net context.Request

var OrderInfo = {"ProductID": 
    "ProductIDValue",
    "ProductName": "ProductName",
    "Quantity": 1,
    "Amount": 9999,
    "SLQuantity": 9999,
    "SLDate": "08/03/2010"
};

var DTO = { 'OrderInfo': OrderInfo };
$.ajax({
    type: "POST",
    contentType: "application/json; charset=utf-8",
    url: "JasonHandler.ashx",
    data: JSON.stringify(DTO),
    dataType: "json"
 });

I’m trying to retrieve posted JSON data on server side in an ASHX file via this code:

string strrequest = context.Request["OrderInfo"];

but it always return null. What Am I doing wrong?

Answers:

Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat them as advisements. If you found the post helpful (or not), leave a comment & I’ll get back to you as soon as possible.

Method 1

1. get the request body from HttpContext.Current.Request.InputStream.
2. read the input stream and convert to string
3. use javascriptserializer to deserialize the json object to a strongly type object (ensure the json properties share the same name as the strongly type counter part)

Method 2

From http://dailydotnettips.com/2013/09/26/sending-raw-json-request-to-asp-net-from-jquery/

var jsonString = String.Empty;

context.Request.InputStream.Position = 0;
using (var inputStream = new StreamReader(context.Request.InputStream))
{
jsonString = inputStream.ReadToEnd();
}

JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();
object serJsonDetails = javaScriptSerializer.Deserialize(jsonString, typeof(object));

Method 3

Digging the Internet. I found out that IE has problem receiving POST request in full. @ronaldwidha’s suggestion on InputStream is similar to what I have found. But rather than using javascriptserializer I use JSON.NET Code snippets is below and I hope this would help other with similar problem

 public class JasonHandler : IHttpHandler {

 public void ProcessRequest (HttpContext context) {

    context.Response.ContentType = "application/json";
    context.Response.ContentEncoding = Encoding.UTF8;

    System.IO.Stream body = context.Request.InputStream;
    System.Text.Encoding encoding = context.Request.ContentEncoding;
    System.IO.StreamReader reader = new System.IO.StreamReader(body, encoding);
    if (context.Request.ContentType != null)
    {
        context.Response.Write("Client data content type " + context.Request.ContentType);
    }
    string s = reader.ReadToEnd();
    string[] content = s.Split('&');
    for (int i = 0; i < content.Length; i++)
    {
        string[] fields = content[i].Split('=');
        //context.Response.Write("<div><strong>" + fields[0] + "</strong></div>");
        //context.Response.Write("<div>" + fields[1] + "</div> ");  
    }

    string jsonRecord = s;
   }
}

Method 4

Request[] will only look at form params and quetystring. You will need to do a form post or use qs or parse the request body yourself.

Method 5

I think you could get the request body out of HttpCurrent.Context.Request.GetResponse().

Its probably a good idea to verify the content-type header first.

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0