How to return JSON with ASP NET jQuery

Question

I cannot get how I can return JSON data with my code   JS    function        ajax           type   POST           url   Default aspx GetProducts           data                contentType   application json  charset utf-8           dataType   json           success  function  msg                   How to return data here like a table                      Second   text msg d                 alert msg d                            C  of Default aspx cs   WebMethod  public static string GetProducts        var products    context GetProducts   ToList          return What do I have to return          Thanks in advance

User · Answer

This structure works for me - I used it in a small tasks management application.

The controller:

public JsonResult taskCount(string fDate)
{
  // do some stuff based on the date

  // totalTasks is a count of the things I need to do today
  // tasksDone is a count of the tasks I actually did
  // pcDone is the percentage of tasks done

  return Json(new {
    totalTasks = totalTasks,
    tasksDone = tasksDone,
    percentDone = pcDone
  });
}

In the AJAX call I access the data like this:

.done(function (data) {
  // data.totalTasks
  // data.tasksDone
  // data.percentDone
});

User · Answer

Asp net is pretty good at automatically converting  net objects to json  Your List object if returned in your webmethod should return a json javascript array  What I mean by this is that you shouldn t change the return type to string  because that s what you think the client is expecting  when returning data from a method  If you return a  net array from a webmethod a javaScript array will be returned to the client  It doesn t actually work too well for more complicated objects  but for simple array data its fine    Of course  it s then up to you to do what you need to do on the client side   I would be thinking something like this    WebMethod  public static List GetProducts        var products    context GetProducts   ToList          return products      There shouldn t really be any need to initialise any custom converters unless your data is more complicated than simple row col data

User · Answer

Try to use this   it works perfectly for me               varb   new List lt object gt          Example      varb Add new     float Parse GridView1 Rows 1  Cells 2  Text           JSON    Serializ  public string Json                           return  new JavaScriptSerializer    Serialize varb                   Jquery SIDE     var datasets                  Products                     label   Products                   data   lt    getJson     gt

User · Answer

Just return object  it will be parser to JSON   public Object Get string id        return new   id   1234

User · Answer

You re not far  you need to do something like this       WebMethod  public static string GetProducts          instantiate a serializer   JavaScriptSerializer TheSerializer   new JavaScriptSerializer         optional  you can create your own custom converter   TheSerializer RegisterConverters new JavaScriptConverter    new MyCustomJson         var products   context GetProducts   ToList          var TheJson   TheSerializer Serialize products      return TheJson      You can reduce this code further but I left it like that for clarity  In fact  you could even write this   return context GetProducts   ToList      and this would return a json string  I prefer to be more explicit because I use custom converters  There s also Json net but the framework s JavaScriptSerializer works just fine out of the box

[c#] How to return JSON with ASP.NET & jQuery

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