Unexpected character encountered while parsing value - c#
Currently, I have some issues. I'm using C# with Json.NET. The issue is that I always get:
{"Unexpected character encountered while parsing value: e. Path '', line 0, position 0."}
So the way I'm using Json.NET is the following. I have a Class which should be saved. The class looks like this:
public class stats
{
public string time { get; set; }
public string value { get; set; }
}
public class ViewerStatsFormat
{
public List<stats> viewerstats { get; set; }
public String version { get; set; }
public ViewerStatsFormat(bool chk)
{
this.viewerstats = new List<stats>();
}
}
One object of this class will be filled and saved with:
File.WriteAllText(tmpfile, JsonConvert.SerializeObject(current), Encoding.UTF8);
The saving part works fine and the file exists and is filled. After that the file will be read back into the class with:
try
{
ViewerStatsFormat current = JsonConvert.DeserializeObject<ViewerStatsFormat>(tmpfile);
//otherstuff
}
catch(Exception ex)
{
//error loging stuff
}
Now on the current= line comes the exception:
{"Unexpected character encountered while parsing value: e. Path '', line 0, position 0."}
I don't know why this comes. The JSON file is the following -> Click me I am the JSON link
Does anyone have any ideas?
Possibly you are not passing JSON to DeserializeObject.
It looks like from File.WriteAllText(tmpfile,... that type of tmpfile is string that contain path to a file. JsonConvert.DeserializeObject takes JSON value, not file path - so it fails trying to convert something like #"c:\temp\fooo" - which is clearly not JSON.
I solved the problem with these online tools:
To check if the Json structure is OKAY: http://jsonlint.com/
To generate my Object class from my Json structure: https://www.jsonutils.com/
The simple code:
RootObject rootObj= JsonConvert.DeserializeObject<RootObject>(File.ReadAllText(pathFile));
In my case, the file containing JSON string had BOM. Once I removed BOM the problem was solved.
I experienced the same error in my Xamarin.Android solution.
I verified that my JSON was correct, and noticed that the error only appeared when I ran the app as a Release build.
It turned out that the Linker was removing a library from Newtonsoft.JSON, causing the JSON to be parsed incorrectly.
I fixed the error by adding Newtonsoft.Json to the Ignore assemblies setting in the Android Build Configuration (screen shot below)
JSON Parsing Code
static readonly JsonSerializer _serializer = new JsonSerializer();
static readonly HttpClient _client = new HttpClient();
static async Task<T> GetDataObjectFromAPI<T>(string apiUrl)
{
using (var stream = await _client.GetStreamAsync(apiUrl).ConfigureAwait(false))
using (var reader = new StreamReader(stream))
using (var json = new JsonTextReader(reader))
{
if (json == null)
return default(T);
return _serializer.Deserialize<T>(json);
}
}
Visual Studio Mac Screenshot
Visual Studio Screenshot
I have also encountered this error for a Web API (.Net Core 3.0) action that was binding to a string instead to an object or a JObject. The JSON was correct, but the binder tried to get a string from the JSON structure and failed.
So, instead of:
[HttpPost("[action]")]
public object Search([FromBody] string data)
I had to use the more specific:
[HttpPost("[action]")]
public object Search([FromBody] JObject data)
This issue is related to Byte Order Mark in the JSON file. JSON file is not encoded as UTF8 encoding data when saved. Using File.ReadAllText(pathFile) fix this issue.
When we are operating on Byte data and converting that to string and then passing to JsonConvert.DeserializeObject, we can use UTF32 encoding to get the string.
byte[] docBytes = File.ReadAllBytes(filePath);
string jsonString = Encoding.UTF32.GetString(docBytes);
I had the same problem with webapi in ASP.NET core, in my case it was because my application needs authentication, then it assigns the annotation [AllowAnonymous] and it worked.
[AllowAnonymous]
public async Task <IList <IServic >> GetServices () {
}
I ran into this issue and it ended up being because of BOM characters in my input string.
Here's what I ended up doing:
String.Trim(new char[] { '\uFEFF', '\u200B' });
This resolved the issue for me.
In my case, I was getting an error on JsonConvert.PopulateObject().
My request was returning JSON that was wrapped in an extra pair of '[ ]' brackets, making my result an array of one object rather than just an object. Here's what I did to get inside these brackets (only for that type of model):
T jsonResponse = new T();
var settings = new JsonSerializerSettings
{
DateParseHandling = DateParseHandling.DateTimeOffset,
NullValueHandling = NullValueHandling.Ignore,
};
var jRslt = response.Content.ReadAsStringAsync().Result;
if (jsonResponse.GetType() == typeof(myProject.Models.MyModel))
{
var dobj = JsonConvert.DeserializeObject<MyModel[]>(jRslt);
var y = dobj.First();
var szObj = JsonConvert.SerializeObject(y);
JsonConvert.PopulateObject(szObj, jsonResponse, settings);
}
else
{
JsonConvert.PopulateObject(jRslt, jsonResponse);
}
If you are using downloading data using url...may need to use
var result = client.DownloadData(url);
In my scenario I had a slightly different message, where the line and position were not zero.
E. Path 'job[0].name', line 1, position 12.
This was the top Google answer for the message I quoted.
This came about because I had called a program from the Windows command line, passing JSON as a parameter.
When I reviewed the args in my program, all the double quotes got stripped.
You have to reconstitute them.
I posted a solution here. Though it could probably be enhanced with a Regex.
I had a similar error and thought I'd answer in case anyone was having something similar. I was looping over a directory of json files and deserializing them but was getting this same error.
The problem was that it was trying to grab hidden files as well. Make sure the file you're passing in is a .json file. I'm guessing it'll handle text as well. Hope this helps.
I had simular problem. In my case the problem was in DateTime format. It was just numbers and it is also know as EpochFormat or UnixTimestamp.
A part from my JSON:
"direction": "outbound",
"date_archive": 1554691800224,
"date_doc": 1524700800000,
"date_sent": 1524704189000,
"date_received": 1524704189000,
"date_store_till": 1712544600224,
So I've used an attribute like this:
[JsonProperty("date_received")]
[JsonConverter(typeof(MicrosecondEpochConverter))]
public DateTime? DateReceived { get; set; }
You can find MicrosecondEpochConverter code here: https://stackoverflow.com/a/19972214/4324624
I faced similar error message in Xamarin forms when sending request to webApi to get a Token,
Make sure all keys (key : value) (ex.'username', 'password', 'grant_type') in the Json file are exactly what the webApi expecting, otherwise it fires this exception.
Unhandled Exception: Newtonsoft.Json.JsonReaderException: Unexpected character encountered while parsing value: <. Path '', line 0, position 0
Please check the model you shared between client and server is same. sometimes you get this error when you not updated the Api version and it returns a updated model, but you still have an old one. Sometimes you get what you serialize/deserialize is not a valid JSON.
In my case, it was the lack of a default parameterless constructor !!!
In my case, I was calling the async service method without using await, so before Task is completed I was trying to return the result!
Suppose this is your json
{
"date":"11/05/2016",
"venue": "{\"ID\":12,\"CITY\":Delhi}"
}
if you again want deserialize venue, modify json as below
{
"date":"11/05/2016",
"venue": "{\"ID\":\"12\",\"CITY\":\"Delhi\"}"
}
then try to deserialize to respective class by taking the value of venue
This error occurs when we parse json content to model object. Json content type is string.
For example:
https://dotnetfiddle.net/uFClKj
Some times, an api that we call may return an error. If we do not check the response status, but proceed to parse the response to model, this issue will occur.
When I encountered a similar problem, I fixed it by substituting &mode=xml for &mode=json in the request.
Related
System.Text.Json.JsonException: The JSON value could not be converted
I'm using Ubuntu and dotnet 3.1, running vscode's c# extension.
I need to create a List from a JSON file, my controller will do some calculations with this model List that I will pass to it
So, here is my code and the error I'm getting.
First, I thought my error was because at model my attributes were char and C#, for what I saw, cannot interpret double-quotes for char, it should be single quotes. Before losing time removing it, I just changed my type declarations to strings and it's the same error.
Can someone help me?
ElevadorModel
using System.Collections.Generic;
namespace Bla
{
public class ElevadorModel
{
public int andar { get; set; }
public string elevador { get; set; }
public string turno { get; set; }
}
}
Program.cs:
class Program
{
static void Main(string[] args)
{
var path = "../input.json";
string jsonString;
ElevadorModel elevadoresModel = new ElevadorModel();
jsonString = File.ReadAllText(path); //GetType().Name = String
Console.WriteLine(jsonString); //WORKS
elevadoresModel = JsonSerializer.Deserialize<ElevadorModel>(jsonString);
}
JSON:
Your input json has an array as the base token, whereas you're expecting an object. You need to change your deserialization to an array of objects. var elevadoresModels = JsonSerializer.Deserialize<List<ElevadorModel>>(jsonString); elevadoresModel = elavoresModels.First();
Your input JSON is an array of models, however you're trying to deserialize it to a single model. var models = JsonSerializer.Deserialize<List<ElevadorModel>>(jsonString);
This is also a problem in Blazor-Client side. For those calling a single object
e.g ClassName = await Http.GetFromJsonAsync<ClassName>($"api/ClassName/{id}");
This will fail to Deserialize. Using the same System.Text.Json it can be done by:
List<ClassName> ListName = await Http.GetFromJsonAsync<List<ClassName>>($"api/ClassName/{id}");
You can use an array or a list. For some reason System.Text.Json, does not give errors and it is successfully able Deserialize.
To access your object, knowing that it is a single object use:
ListName[0].Property
In your case the latter solution is fine but with the path as the input.
In my case, I was pulling the JSON data to deserialize out of an HTTP response body. It looked like this:
var resp = await _client.GetAsync($"{endpoint}");
var respBody = await resp.Content.ReadAsStringAsync();
var listOfInstances = JsonSerializer.Deserialize<List<modelType>>(respBody);
And the error would show up. Upon further investigation, I found the respBody string had the JSON base object (an array) wrapped in double quotes...something like this:
"[{\"prop\":\"value\"},...]"
So I added
respBody = respBody.Trim('\"');
And the error changed! Now it was pointing to an invalid character '\'.
I changed that line to include
respBody = respBody.Trim('\"').Replace("\\", "");
and it began to deserialize perfectly.
For reference:
var resp = await _client.GetAsync($"{endpoint}");
var respBody = await resp.Content.ReadAsStringAsync();
respBody = respBody.Trim('\"').Replace("\\", "");
var listOfInstances = JsonSerializer.Deserialize<List<modelType>>(respBody);
HTTP POST read response as regular string
I am currently doing a API HTTP POST project.
I should be getting
"[{\"ID\":\"311d1977-4772-435a-92aa-028791c53154\",\"ParentID\":\"187a064e-ffea-45a2-9264-9acecff911e1\",\"Type\":\"txt\",\"OwnerID\":\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\",\"Name\":\"Davinshi.txt\",\"CreatedBy\":\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\",\"CreatedDate\":\"2015-06-05T04:11:33.187\",\"Status\":0,\"Mark\":null},{\"ID\":\"25c80f4e-679c-4093-ade9-0b99da480153\",\"ParentID\":\"187a064e-ffea-45a2-9264-9acecff911e1\",\"Type\":\"jpg\",\"OwnerID\":\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\",\"Name\":\"leonid afremov.jpg\",\"CreatedBy\":\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\",\"CreatedDate\":\"2015-06-05T04:11:46.61\",\"Status\":0,\"Mark\":null}
However with the follow code I am getting a weird output
using (var client = new WebClient())
{
var val = new NameValueCollection();
foreach (var item in values)
{
val.Add(item.Key, item.Value);
}
var response = client.UploadValues(url, val);
return Encoding.Default.GetString(response);
}
This is the output
\"[{\\\"ID\\\":\\\"311d1977-4772-435a-92aa-028791c53154\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"txt\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"Davinshi.txt\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:33.187\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"25c80f4e-679c-4093-ade9-0b99da480153\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"jpg\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"leonid afremov.jpg\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:46.61\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"5648cc67-1408-4935-a656-0f9b5116db8d\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"jpg\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"misty mood leonid.jpg\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:49.437\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"7402e7b8-1ec4-4bf8-9042-142a69cecbcd\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"jpg\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"winter sparkle.jpg\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:12:03.26\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"7159e926-1601-41d6-8dce-20e5daab90a6\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"txt\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"gentle rain beata sasik.txt\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:40.6\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"e61f7bc4-bebf-403b-a478-22b36856a6df\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"jpg\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"MoonLight.jpg\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:50.797\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"e46e6250-655b-4105-a888-2574750f2944\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"jpg\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"blue fire.jpg\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:27.037\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"bfca703b-1720-4a67-b0a4-2f6146c820aa\\\",\\\"ParentID\\\":null,\\\"Type\\\":\\\"folder\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"School\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:17.96\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"5c1bf9ca-b368-46c8-9804-3254eda00806\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"txt\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"Woman.txt\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:12:06.607\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"8ad07f3c-7a57-4add-92c0-329aca372c8b\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"jpg\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"intimacy worship.jpg\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:40.727\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"ac5384c4-66ca-45cd-99f0-437c0789a26a\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"txt\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"Under the Rain.txt\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:12:01.007\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"aa731f04-cc4e-4349-9268-4476ff04b473\\\",\\\"ParentID\\\":\\\"bfca703b-1720-4a67-b0a4-2f6146c820aa\\\",\\\"Type\\\":\\\"folder\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"Marsiling Secondary School\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:20.983\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"af650810-0538-432e-8bf3-47429eb17d27\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"jpg\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"finger paintings.jpg\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:35.65\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"ddac31de-2b67-4f56-aefd-508a8f49926f\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"txt\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"My Love.txt\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:56.55\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"f2454474-d834-4bd1-992e-548cdc2734c1\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"txt\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"boat.txt\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:28.813\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"e1f5be01-29c7-4ca9-ae6f-5ddf8638cc67\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"jpg\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"Davinshi.jpg\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:34.687\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"ff3a7365-7b4e-4a46-b545-6a2f889ff898\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"jpg\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"landscape paintings.jpg\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:44.48\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"327bf043-1e88-4265-ba5e-6de8394a0d84\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"jpg\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"lord rama.jpg\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:47.753\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"1d8a01de-da06-466d-8b7d-6e0bb8478d5e\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"txt\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"intimacy worship.txt\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:41.617\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"f23103ec-0d8c-407b-9f20-719f0577c274\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"jpg\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"Coast of Sicily.jpg\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:32.187\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"374779d5-16e9-417f-808f-87fcf85035b0\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"txt\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"misty mood leonid.txt\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:54.203\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"f0bb2dc7-eac3-407d-a85a-886aaf161fc2\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"jpg\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"boat.jpg\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:28.907\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"607ee7b8-7287-4f3f-9867-8a8069562d3c\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"jpg\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"Ballet.jpg\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:24.167\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"246b349e-ab32-407a-90ff-8df18bbabc68\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"txt\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"Ballet.txt\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:23.917\\\",\\\"Status\\\":0,\\\"Mark\\\":null},{\\\"ID\\\":\\\"457d722f-a675-4523-bd83-8f309dcd254e\\\",\\\"ParentID\\\":\\\"187a064e-ffea-45a2-9264-9acecff911e1\\\",\\\"Type\\\":\\\"txt\\\",\\\"OwnerID\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"Name\\\":\\\"finger paintings.txt\\\",\\\"CreatedBy\\\":\\\"5bd087f0-070d-48bd-98b4-10ffa4b3b792\\\",\\\"CreatedDate\\\":\\\"2015-06-05T04:11:39.017\\\",\\\"Status\\\":0,\\\
Which I think the HTTP POST Response is reading the string as a verbatim string.
Any idea how can i fix it ?
Thanks !
When I run your code, the output of Encoding.Default.GetString(response) is exactly the string you posted at the top of your question. The excessively backslash-escaped string appears in the Visual Studio debugging window simply because VS escapes special characters when displaying a string, but if you try to save this string into a file or use it in any other way in your code, you will see that only the double quote marks are escaped, like the string at the top of your question.
I found out that the API will automatically convert the object to json format. The problem occur when I try to serialize the object before sending trough the API.Hence, like what Denis Yarkovoy said. It's double serialized.
Is it possible to return a pre-encoded JSON string in a SignalR hub method?
In an MVC project, I have a method on a hub similar to this:
public string Foo() { return DoCrazyThingThatReturnsJson(); }
Unfortunately SignalR (or something) takes the encoded JSON string and happily encodes it, then returns it, so browser be like LOLWTF. Is there a way to skip this second encoding?
Looking at this here: We assume that any ArraySegment is already JSON serialized it seems like something like this may work (note that I haven't tried it, so no promises): string jsonString = ...; // your serialized data var jsonBytes = new ArraySegment<byte>(Encoding.UTF8.GetBytes(jsonString)); Clients.Caller.sendJson(jsonBytes); (The above only works for PersistentConnection because of what constitutes a value - for hubs, the data is wrapped in a container with the RPC info; I'm only leaving this in case using PersistentConnection is an option for you) Another idea might be creating a container class for a JSON string, then using a custom converter that simply writes the string as-is, then register like this in the Signalr startup code: var serializer = new JsonSerializer(); serializer.Converters.Add(new PreserializedConverter()); GlobalHost.DependencyResolver.Register(typeof(JsonSerializer), () => serializer);
Newtonsoft Json throws ArgumentNullException
I am using the Newtonsoft Json library to handle Json strings.
I am currently in a project in which I have to receive a string from a RabbitMQ server. The string looks like this when I convert from the RabbitMQ response to the JObject found in the library:
{ "LoanResponse": { "interestRate": "12.768", "ssn": "811671177" }}
When I call the following code:
public AbstractDTO ToDTO(JObject jsonObj)
{
BankResponseDTO dto = new BankResponseDTO();
dto.InterestRate = jsonObj.GetValue("interestRate").Value<double>(); // <-- here is where it throws
dto.SSN = jsonObj.GetValue("ssn").Value<String>();
return dto;
}
I get the ArgumentNullException. With the following message:
{"Value cannot be null.\r\nParameter name: source"}
It clearly contains an interest rate but it still tells me that it's null.
Anyone who might know what could be the issue here which i am facing difficult to find?
Parse Json Object
I have an List error Entity which I used to pass errorId and error message to the UI layer.
public class ErrorEntity
{
public int ErrorId
{
get;
set;
}
public string ErrorMessage
{
get;
set;
}
}
}
I send the object to the Javascript I am serializing it to JSON.
The Json I am getting after serialization look like
[{"ErrorId":1,"ErrorMessage":"Test has not been prepared for tag EP105"},{"ErrorId":2,"ErrorMessage":"Test has not been prepared for tag EP105"}]
Now I need to parse this Json string to show the error message to the user. Please let me know how can I parse it. Do I need to write a for loop to traverse with in it.
EDIT In my master page I am trying to parse it.
function ShowErrorMsg(jsonObject) {
for (i = 0; i < jsonObject.Object.length; i++) { //Object is undefined here.
alert(jsonObject.Object.ErrorMessage);
}
}
Prefer JSON.parse() if it's available: var jsonArray = JSON.parse(serializedString); window.alert(jsonArray[0].ErrorMessage); Fall back to eval() otherwise: var jsonArray = eval(serializedString); window.alert(jsonArray[0].ErrorMessage);
Try Json.NET
There is support in most browsers for parsing json, I recommend to use jQuery for this - you also can take a look at this Be aware - Its better to use a library - and not using JS for this (JS is from the devil ;) )