asp.net jquery ajax json: Simple example of exchanging data

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失恋的感觉

(Question resolved with the help of the two reply posts--see below)

I would appreciate help getting a simple example of exchanging data JSON data between a browser (

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孤街浪徒

2021-01-13 13:28

Other resource suggest removing the contentType: 'application/json; charset=utf-8', from the AJAX call:

  $.ajax({ 
            url: "ericHandler.ashx", 
            data: myData, 
            dataType: 'json', 
            type: 'POST', 
            success: function (data) { alert("DIDit = " + data.eric); }, 
            error: function (data, status, jqXHR) { alert("FAILED:" + status); } 
        });

Read the values on the server side:

string myPar = context.Request.Form["par"];

You can also try:

string json = new StreamReader(context.Request.InputStream).ReadToEnd();

which was mentioned here: https://stackoverflow.com/a/8714375/139917

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情书的邮戳

2021-01-13 13:47

I got this working right away. This is its most basic form:

HTML:

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <script src="Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>

    <script language="javascript" type="text/javascript">
        $(document).ready(function () {
            $.ajax({
                url: 'Handler.ashx',
                type: 'POST',
                success: function (data) {
                    alert(data);

                },
                error: function (data) {
                    alert("Error");
                }
            });
        });
    </script>
    <title></title>
</head>
<body>
    <form id="form1" runat="server">

    </form>
</body>
</html>

Code Behind:

<%@ WebHandler Language="C#" Class="Handler" %>

using System;
using System.Web;

public class Handler : IHttpHandler
{

    public void ProcessRequest(HttpContext context)
    {
        context.Response.ContentType = "text/plain";
        context.Response.Write("Hello World");
    }

    public bool IsReusable
    {
        get
        {
            return false;
        }
    }
}

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