Read An External JSON File Using Json.NET On Page Load?
Dec 29, 2010
I have a text file named gisQuery129.json that is created using Json.NET - [URL] There is an example on how to create a JSON file and I have done that successfully, but I want to read the file on a page load event and add the values to .NET textbox controls for input values in a query. The created file looks like the following:
{
"myData": {
"randomNumber": "129",
"Application": "MyMapApp",
"FeatureId": "ALL",
"Feature": "ALL",
"spatialQuery": "FEATURE_ID= '11111' AND REQ_SEQ_NUM= 1 AND RAND_PARAM= 129 OR FEATURE_ID= '22222' AND REQ_SEQ_NUM= 2 AND RAND_PARAM= 129"
}
}
I want to read the data in the above sample JSON data and then populate my textboxes something like this:
txtRandParam.text = "129"
txtApplication.text = "MyMapApp" and three more text boxes after that.
I have read about desearlizing a json file into class fields which I understand. But what I cannot find in a tutorial is how to read in the json data. Everyone just adds the data to a variable and uses it. I will be passing in a json file from a mobile app. I know I should use a web service but for now I want to use an asp.net ASPX page to do this. I will be using the newtonking json control.
I have a ASP.NET MVC 1.0 app.I have a listbox on the page and I want to pass an array to the webpage so that javascript can use the array to do some processing depending on the item picked in the listbox.So I thought the best way is to pass JSON data to the webpage on load.So what is the best practice on how to do this?Can you please give me a brief step by step process.How do pass the array as JSON and how do I access it by index?
I need to make a call to a json webservice from C# Asp.net. The service returns a json object and the json data that the webservice wants look like this:
"data" : "my data"
This is what I've come up with but I can't understand how I add the data to my request and send it and then parse the json data that I get back.
string data = "test"; Uri address = new Uri("http://localhost/Service.svc/json"); HttpWebRequest request = (HttpWebRequest)WebRequest.Create(address); request.Method = "POST"; request.ContentType = "application/json; charset=utf-8"; string postData = "{"data":"" + data + ""}";
How can I add my json data to my request and then parse the response?
I use the JavaScriptSerializer class of ASP.net to serialize my object and return it to the client side. How can I deserialize the string using JavaScript?
I've been tasked with implementing a JSON feed on an asp.net website that will be consumed by 3rd party apps (such as IPhone, Android, etc) and I'd like to follow best practices.
An example of what I'd like to achieve would be something similar to: [URL]
I've chosen the JSON.net api as this seems to be highly recommended.
My Google-fu must be failing me as I can't find a single full example code for an Asp.net web application with JSON.net implemented on it, so I've no real concept of where to begin.
My question is fairly simple:
Should I create this sort of feed as an ASPX, or ASHX file? Or even a .NET Web Service? (Remember that the tools that will be using this feed are on external apps like IPhones, etc)
I created a test feed in both ASHX and ASPX format ... here is the code (I'm using Subsonic to populate the collection) ... are either of these along the correct lines?
I am trying to build a page which consists of different user controls which is divided in 3 columns.I have created a custom class for the page and widgets where the user controls will be loaded in. The custom class needs to be stored in an XML file, and using jQuery sortable for drag-and-drop functionality.At this point, my question is what is the best implementation for loading and saving the states of the page and widgets inside the page? I was thinking about using JSON and WebMethod for that, but I am still missing out the architecture on how I should build the page
I'd like to read data server-side from a web service that outputs in json format. I haven't found any good examples that don't use jquery and are server-side.
Specifically I'm looking at the "weight" field from this api:
have this site that has an api that can provide city name if I send my zip code as a parameter. http://www.postnummersok.se/api?q=16447the result is returned as a json object. Now i just want to read the result in my js function.I have tried the following but it always returns null:
I am using JQuery & JSON (POST) to call webmethod. However I can call only webmethod located at aspx file but not in asmx file Below are sample codes
CustomValidate.asmx Imports System.Web.Services Imports System.Web.Services.Protocols Imports System.ComponentModel Public Class CustomValidate Inherits System.Web.Services.WebService 'ACCESS VIA JSON <System.Web.Services.WebMethod()> _ Public Shared Function AJAX_Test(ByVal date1) As Boolean... Return True End Function End Class Javascript: JQuery JSON function isDates(source, arguments) { var isValidDate; $.ajax({ type: "POST", contentType: "application/json; charset=utf-8", url: "CustomValidate.asmx/AJAX_Test", data: '{date1: "' + arguments.Value + '"}', dataType: "json", async: false, success: function(result) { isValidDate = result; }, error: function(httpRequest, textStatus, errorThrown) { alert("status=" + textStatus + ",error=" + errorThrown); } }); arguments.IsValid = isValidDate; }
It always return javascript undefined error. But if I put the AJAX_Test webmethod in aspx page and replace the url: "CustomValidate.asmx/AJAX_Test" to "mypage.aspx/AJAX_Test". It works fine.
I have to duplicate some settings (like connection string) between a web.config file that a WCF host uses and a web.config file that a web client uses.
In the interest of not duplicating, can I have both the web.configs read from a separate xml file? The two web.configs can be entirely in different solutions/projects so I guess this is not possible, but wanted to get other's opinion.
PS: I do understand I can use a database to store all the config settings.
I have a simple webservice that I would like to upload a file to. The problem is that I need the response in json.
Form my experience in order to get a response in Json my request has to have a content-type of 'application/json'. But ofcourse this cannot be the case with a file upload since the content type will have to be 'multipart/form-data'.
In my Json i want to return a value showing whether successful and a filename.
i have a few calls however when i type in the URI into the address bar in internet explorer it prompts me to save the file. However google chrome displays it automatically in the browser page. Does anyone know why this would occur, here is an example of one of my calls;
I'm having a very hard time wrapping my head around this problem (it might be the heat from the summer finally arriving).
Problem:
I want the user to press a button client side which performs javascript data preparing and at last send a JSON structure to (currently a asmx webservice on) the server. The JSON structure is several levels deep.
Server side I create a PDF file which I want to send back to the user.
Goal: The user feeling is that she presses a button and expects a PDF to return to her - either in a new window or as a download (preferrable).
Tools: The system consists of (client side) HTML, JavaScript and ExtJS and (server side) ASP.NET.
Normally I would use an ashx handler to return a file to the client, but can I send a JSON structure to the handler and still be able to parse it correctly server side?
I have json file Users.json and I want read json object from file and store in to database one by one. how to delete json object when it stored in database. when object not save in database then it not delete from file. Need to know about delete json object.
using (FileStream fs = new FileStream("user.json", FileMode.Open, FileAccess.Read)) using (StreamReader sr = new StreamReader(fs)) using (JsonTextReader reader = new JsonTextReader(sr))
I have to write a page method in ASP.Net that returns a JSONP result. In order to build its payload for return however, it has to read a URL from another domain, passing it some parameters that were passed to it originally. I suppose I'll need to screen scrape the results to see if the login credentials worked. Could point me toward ideas that might begood for ASP.Net or ASP.Net MVC?
I'm trying to return an error page indicating that the user couldnt be found and therefore I throw a HttpException with status code 404, however for some reason it wont redirect to the error page? - Is there some sort of trick to handle error pages with JSON that I should be aware of? My current code:
public ActionResult Details(int id) { User userToGet = _session.Query(new GetUserById(id)); if(userToGet == null) { throw new HttpException(404, "User not found"); } DetailsUserViewModel userToViewModel = AutoMapper.Mapper.Map<User, DetailsUserViewModel>(userToGet); return Json(new { HTML = RenderPartialViewToString("Partials/Details", userToViewModel) }, JsonRequestBehavior.AllowGet); }
I am trying to load the JSON data that I am getting from an aspx page into a drop down list that I have on another page but I am getting the following javascript error.
Microsoft JScript runtime error: 'SiteID' is null or not an object
The SiteID is not returning null though and I believe that is an object. The following is the code I am using to try and load the data into the drop down list:
$.getJSON('Test.aspx?DepotID=' + DepotID, function (sites) {
