Using JSON With .NET ASP.NET 2.0?
Nov 3, 2011
I'm trying to understand how to actually use, and create JSON data.
StringBuilder sb = new StringBuilder();
StringWriter sw = new StringWriter(sb);
using (JsonWriter jsonWriter = new JsonTextWriter(sw))
[code]....
and I am sure it does... but how do I view it? How do I turn that into an object that the browser can output.It seems to me that the first stage I need to resolve is "how to create" JSON files/strings, next stage will be how to actually use them. If it helps answer the question, what I'm aiming for initially is to be able to use AJAX Autocomplete from a search page generated from my MySQL database, I was hoping I could write a simple SQL query and have that returned using something similar to the above?
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May 9, 2012
I am been stuck on this for 3 days now...I have been accessing the twitter api to pull a user_timeline for a list of users and the json that comes back is impossible to work with. I tried to deserialize it using javascriptserializer and get an error:invalid object passed in , ':' or '}'
Now this is frustrating since I expect the json being returned to be error free. Then I tried json.net and split the posts using string.split and tried to convert each post to Jobject or jarray. for Jarray I get
'unexpected end of content while loading jArray
[Code]...
Now I have formatted the code here and not pasted the whole file but it does look like valid json to me and I do not alter anything after receiving the stream from the twitter api. Can someone please point me in the right direction? I really need to get this stuff parsed?
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Feb 21, 2011
I'm strugling the whole day with the next JSON string
{
"0":{"link":"afbeeldingenplaatje1.jpg"},
"1":{"link":"afbeeldingenplaatje2.jpg"},
"2":{"link":"afbeeldingenplaatje3.jpg"}
}
How can i deserialize this? What's wrong with the next code (vb.net)
Public Class DataString
Private m_link As String
Public Property link() As String
Get
[CODE]...
It returns always an empty result.
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Jul 28, 2011
how to receive and send back json. Hope someone can help me on this. I understand by examples.
On my clientside, I am sending a ajax json string "name":"theName" to the server side and would like the server side to return a string saying "welcome &name ".
Client-side code
<!DOCTYPE html>
<html>
[Code]....
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Nov 12, 2010
Below is my JSON formated String
{"AliasName": "ysiCountryInfo", "DataClass": {"Description":"United States 111","Code":"usa","WriteOffTaxPointAdjustment":0,"IndexationRounding":6}}
I would like to deserialize object into below class
[code].....
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Jan 18, 2012
I have a JSON response from a web service that I need to be converted to an object then to an array. My response is similar to the one below:
{"status":{"error":"NO","code":"200","description":"none","message":"Request ok"},"geolocation":{"lat":"38.89515","lng":"-77.0310"},"stations":[{"country":"United States","regPrice":"0.00","midPrice":"0.00","prePrice":"0.00","streetAddress":"1401, I St[code]....
I am doing this is VB.NET within a console for now. Basically I am trying to create a simple way to test my API calls and output the information. What I am trying to accomplish is having to loop through the JSON array and list the stations.
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Jul 17, 2011
How can I convert a JSON string to an array OR a JSON string to XML in VB.NET? I know how to do this in C#, as I have read dozens of articles on it, however, I am unable to figure out how to achieve the same result in VB.NET.
I'm using the System.Web.Script namespace via System.Web.Extensions.dll (from Microsoft).
I'm willing to use an additional DLL file if needed.
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Mar 2, 2010
I'm sure this has been asked before but I'm not finding quite the information I'm needing so I thought I'd post this.
I've written a PHP script that returns a simple JSON object that looks like this:
{"status":"success","level":"admin"}
I'm doing a standard web request that submits the required data to the script over the internet and that's working fine.
Now, I want to use JSON.NET to pull out the individual variables so I can know what the values of "status" and "level" are. The problem is, I have no idea where to start.
I'm doing this in VB.NET (on the .NET Compact Framework).
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Feb 15, 2011
I am accessing the facebook api and using the json.net library (newtonsoft.json.net)I declare a Jobject to parse the content and look for the specific elements and get their values. Everything works fine for the first few but then I get this unexplained nullexception error " (Object reference not set to an instance of an object)Now I took a look at the declaration but cannot see how to change it. Dim jobj as JObject = JObject.Parse(responseData) message = jobj("message").tostring
The error occurs at the last line above.I check to see if message is null and then look for the next desired field as follows
[Code]...
This is one example where "message" does not appear in the first few lines but appears later. So what I do is look for position of message and description and which ever is first go and get that and if I get an error or the fields do not return anything, I try and parse by regex and even that is not working right.
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Nov 24, 2011
I have two experimental web services. One is an asmx contained within a .net web application. The other is a WCF service library being invoked from the web application.The asmx basically does everything I need, but I think WCF would be better, except that it doesn't do anything as I would expect after fiddling with the asmx service.For example, the same method behaves differently in each:
' ASMX
<WebMethod(BufferResponse:=True, EnableSession:=False)>
Function Test(aObject as Object) as Object
' object will have been successfully serializaed into a dictionary
[code]...
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Jun 13, 2011
I have to send a request to Webservice and I have a working PHP solution, that I have to translate in VB.net
Here's the code working in PHP
//fill in the details of the contacts.userId is obtained from loginResult.
$contactData = array('lastname'=>'Valiant', 'assigned_user_id'=>$userId);
//encode the object in JSON format to communicate with the server.
[code]....
Naturally I imported a reference to a Json library and Imported (Imports Newtonsoft.Json)?
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Feb 5, 2010
What libraries are available to handle JSON in .Net? I've seen this: [URL]..but would prefer a native library, if possible.
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May 17, 2011
[Code]...
I always get {} as answer. What's wrong?
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Nov 12, 2010
Alright I have been trying to figure this out and I read the MSDN page on the JavaScriptSerializer. However, I still can't figure out how to get this to work on an asp.net page. I want to convert my dataset into a json string so I can graph it using FLOT(graphing tool) imports System.Web.Script.Serialization
dim myObject = dataset.getxml()dim jsonString = new JavaScriptSerializer().Serialize(myObject)
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Feb 19, 2010
I'm trying to figure out how to do SQL queries towards an SQL 2005 Express server and format the return value to JSON. I got the queries working using this (perhaps very newbie-like) code;
Imports System
Imports System.Data
Imports System.Data.SqlClient
Imports System.Web.UI
[code]....
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Apr 26, 2012
I am trying to call a rest service..that service returns json object...I am able to send the request but unable to serialize the json...here is the code i am trying
[Code]...
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Mar 15, 2012
I have an assigment where I must send queries to the database and the returns data. I would like to convert that data to a json and then use it with jQuery
My idea is make an array (żarrayList?) and then convert it to json.
How can i use json with asp.net vb? I'm not allowed to use a webservice yet
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Jan 13, 2011
How can I read JSON with ASP.NET 2.0? Unfortunately we are unable to upgrade the application because of backward compatibility issues.
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Feb 25, 2012
I am trying to deserialize a JSON string using VB.net and cannot seem to pull the values out of the finished List.[code]I am told "Index was out of range. Must be non-negative and less than the size of the collection."
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Sep 13, 2011
I'm having an issue with getting some of the values from with this json string:
{
"kind": "shopping#products",
"etag": ""YZWJaKE3MHROIW8rCIlu9mAACLM/6qxBB-GwuSPy5L3_zVS6sS2NYFI"",
"id": "tag:google.com,2010:shopping/products",
"selfLink": "https://www.googleapis.com/shopping/search/v1/public/products?country=US&
[code]....
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Feb 7, 2011
I have the following jquery which is invalid:
{
"id": 12,
"heading": "heading goes here 3",
"content": "<p><span style="color: #ff0000;">content</span> <u><strong>goes </strong></u><span style="color: #ffffff;"><span style="background-color: #ff0000;">here</span></span> 3.</p>"
}
I am generating this with asp.net (vb.net) from data stored in a database. I think I need to somehow escape the double quotes within the content section of the json data. How do I do this?
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Mar 18, 2011
I'm new to VB and trying to write a webservice that exports and imports JSON.I'm using JSON.NET 3.5 and can serialize fine:My Token class is:
<DataContract()> _
Public Class Token
<DataMember()> _
Public TokenID As String
<DataMember()> _
Public Issued As Date
[Code]...
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Jun 23, 2011
At the moment, I am building json data as follows:
<%@ Page Language="VB" Debug="True" EnableViewState="false" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
[Code].....
Is this the preferred method of creating JSON data using .NET?
I think I am supposed to use asmx web services with arrays converted to json? But all the examples I have seen are in C#.
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Jun 23, 2011
I have the following code which serialize an array to json:
Dim col1 As New ArrayList
Dim col2 As New ArrayList
objJSONStringBuilder = New StringBuilder()
objSQLConnection = New SqlConnection(System.Configuration.ConfigurationManager.AppSettings("connString"))
objSQLCommand = New SqlCommand("select col1, col2 from table1", objSQLConnection)
objSQLCommand.Connection.Open()
[Code]...
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Feb 21, 2010
I'm trying to use the JavaScriptSerializer to work with this code. However it crashes when it reaches the last line;
Dim json As New String(sr.Serialize(dt))
I get this error message;
A circular reference was detected while serializing an object of type 'System.Reflection.Module'.
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Feb 23, 2010
We are trying to consume WCF service which returns employee details in JSON Format.like:
{"d":[{"_type":"Employee:#","BigThumbNailURI":null,"ID":1,"Name":"E1"},{"_type":"Employee:#","BigThumbNailURI":null,"ID":2,"Name":"E1"}]}
From VB.net code behind when I am trying to deserialize it it's stating that "Expecting state 'Element'.. Encountered 'Text' with name '', namespace ''."
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Feb 1, 2011
I have a json array which is formatted as follows:
[Code]...
How can I deserialize this in such a way that I can have a list of objects indexed by property? Meaning, I want to be able to access the data like this: MyList(96).lastproperty or MyList(96).listofstuff.yetanother and have it return the proper datatype too? Is that even possible in vb.net?
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Feb 23, 2009
I need to pass back a JSON result for a routine I am working with. How can I encode an Array I created to JSON? I am writing this in VB.net
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May 9, 2012
I am attempting to create a class in vb.net from the below JSON example.I am fairly new to JSON, and I am just having trouble figuring out the correct way of doing this. I have looked at numerous examples of how to do this but they are in much simpler formats than the one I am providing below.
[Code]...
I am guessing this is poorly worded, but I am struggling to find a good example of how this would be done. I need to have the class correctly formatted so when I deserialize into the class it works without error.
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Nov 14, 2011
I've the following JSON string to deserialize:
[{"application_id":"1","application_package":"abc"},{"application_id":"2","application_package":"xyz"}]
I'm using DataContractJsonSerializer method. It is made up of array of items and I couldn't find an example using VB.Net that can deserialize this structure. I have the following Application class to store this information:
<DataContract(Namespace:="")> _
Public Class ApplicationItem
<DataMember(Name:="application_id")>
[Code] .....
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