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Cannot deserialize the current JSON object into type 'System.Collections.Generic.List1' in Xamarin Forms

I'm having an error in Xamarin Forms I tried to deserialize the object does anyone know What did I do wrong here?
This is my method
private async void GetEmployee()
{
var _token = await GetAccessToken();
//List<D365Employee> Employee = null;
using (var _clientD365 = new HttpClient())
{
var _uri = "domain here";
_client.BaseAddress = new Uri(_uri);
_client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
_client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", _token);
var _response = await _clientD365.GetAsync("my endpoint here");
var Emp = JsonConvert.DeserializeObject<List<Employee>>(_response.Content.ReadAsStringAsync().Result);
Employee = new ObservableCollection<Employee>(Emp);
}
}
This is my Model
public class Employee
{
[JsonProperty("#odata.etag")]
public string Context { get; set; }
public IList<EmployeeDetails> Value { get; set; }
}
public class EmployeeDetails
{
public string PersonnelNumber { get; set; }
public string EmploymentLegalEntityId { get; set; }
public string DimensionDisplayValue { get; set; }
}
This is the JSON I try to parse
{
"#odata.context": "https://employee.dynamics.com/data/$metadata#Employees(PersonnelNumber,EmploymentLegalEntityId,DimensionDisplayValue)",
"value": [
{
"#odata.etag": "W/\"JzEsNTYzNzE0NDYwMzsxNDg2NTk2NzY0LDU2MzcxNDc2OTM7MSw1NjM3MTQ0NjAzOzEsNTYzNzE0NDYwMzsxLDU2MzcxNDczNzE7MCwwOzAsMDsyNTY0OTEwODksNTYzwJw==\"",
"PersonnelNumber": "ID111028",
"EmploymentLegalEntityId": "OOP",
"DimensionDisplayValue": "----",
}
]
}

That JSON is a single object, not a list, so you need to deserialize it as a single object.
var Emp = JsonConvert.DeserializeObject<Employee>(await _response.Content.ReadAsStringAsync());

C# HttpClient post content with FormUrlEncodedContent object in Dictionary string/object

I am trying to post a contect to my server.
This is how I have been doing it for the past and it was working until I had to use objects besides strings.
using (HttpClient client = new HttpClient())
{
client.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue(authType, tokens);
var postParams = new Dictionary<string, object>();
postParams.Add("string", string);
postParams.Add("int", string);
postParams.Add("datetime", DateTime);
postParams.Add("datetime", DateTime);
postParams.Add("Match", Match);
postParams.Add("TicketId", token);
using (var postContent = new FormUrlEncodedContent(postParams.ToDictionary()))
{
var myContent = JsonConvert.SerializeObject(postParams);
var buffer = System.Text.Encoding.UTF8.GetBytes(myContent);
var byteContent = new ByteArrayContent(buffer);
byteContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");
using (HttpResponseMessage response = await client.PostAsync(#"http://url/api", byteContent))
{
response.EnsureSuccessStatusCode(); // Throw if httpcode is an error
using (HttpContent content = response.Content)
{
string result = await content.ReadAsStringAsync();
var Json = JsonConvert.DeserializeObject<bool>(result);
return Json;
}
}
}
}
And this is how my request is supposed to be.
methode: POST
object: {
"title":"test-ticket-2",
"detail": "Description test create ticket in prod",
"dateStart": "2019-10-06",
"dateEnd": "2019-10-12",
"ratio": "2.15",
"matchResult": "2",
"matchs": [
{
"Teams": "Test-match-1",
"Proposal": "3x",
"DateStart": "2019-10-06 18:00",
"DateEnd": "2019-10-06 20:00",
"Payout": "0.6"
}
]
I have no idea IF and HOW I can add Objects other than string and make the request.
Any ideas?
Edit: Match looks like this
public class Match
{
public int Id { get; set; }
public string Teams { get; set; }
public string MatchResults { get; set; }
public string Proposal { get; set; }
public string Payout { get; set; }
public DateTime? DateStart { get; set; }
public DateTime? DateEnd { get; set; }
public Uri Ball { get; set; }
public int TicketId { get; set; }
}

HOW I can add Objects other than string and make the request. Any
ideas?
using (HttpClient httpclient = new HttpClient())
{
Models.ApplicationUser applicationUser = new ApplicationUser();
string serialized = Newtonsoft.Json.JsonConvert.SerializeObject(applicationUser);
StringContent stringContent = new StringContent(serialized);
httpclient.PostAsync("url", stringContent);
}
Hope you want to do something like this

JSON Not Deserializing

This is one of my first ventures into WCF/JSON. I created a WCF Web Service. This is one of my methods. It is how I serialize the datable to JSON.
public string GetPrayers()
{
DataTable myDt = new DataTable();
myDt = sprocToDT("LoadPrayers");
string JSONString = string.Empty;
JSONString = JsonConvert.SerializeObject(myDt, Formatting.None);
return JSONString;
}
This returns a nice JSON Dataset:
{"GetPrayersResult":"[{\"prayerid\":2,\"prayer\":\"Please pray for my
dog Rusty. He has cancer
:(\",\"prayerCategory\":\"General\",\"prayerDate\":\"2017-06-10T21:24:16.1\",\"handle\":\"GuruJee\",\"country\":\"USA\"},{\"prayerid\":1,\"prayer\":\"Help
Me I need a appendectomy
STAT\",\"prayerCategory\":\"Sports\",\"prayerDate\":\"2017-04-10T20:30:39.77\",\"handle\":\"GuruJee\",\"country\":\"USA\"}]"}
When I go to deserialize it I get all nulls. Here is the classes I created:
public class PrayUpPrayers
{
public string prayer { get; set; }
public string prayerid { get; set; }
public string prayerCategory { get; set; }
public string prayerCategoryID { get; set; }
public string prayerDate { get; set; }
public string handle { get; set; }
public string country { get; set; }
}
public class ThePrayer
{
public PrayUpPrayers prayers { get; set; }
}
}
This is how I am retrieving the JSON:
void getData()
{
var request = HttpWebRequest.Create(string.Format(#"URLGoesHere"));
request.ContentType = "application/json";
request.Method = "GET";
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
if (response.StatusCode != HttpStatusCode.OK)
Console.Out.WriteLine("Error fetching data. Server returned status code: {0}", response.StatusCode);
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
{
var content = reader.ReadToEnd();
string foo = content.ToString();
var testing = JsonConvert.DeserializeObject<prayupapp.ModelClasses.PrayUpPrayers>(foo,
new JsonSerializerSettings
{
NullValueHandling = NullValueHandling.Ignore
});
Testing is always null? Is the issue that I am serializing it wrong, could it be the class structure, or is it related to how I am deserializing it. One important note: I checked my JSON on one of these JSONClassesFromC# sites and it only returns the GetPrayersResult as the only class item. Ignoring completely my entire structure.

You didn't provide the code for sprocToDT, but it should create ThePrayer object witch should contain list of PrayUpPrayers
public class ThePrayer
{
public List<PrayUpPrayers> prayers { get; set; }
}
And then you should deserialize ThePrayer object, not PrayUpPrayers.
For example
PrayUpPrayers prayUpPrayers1 = new PrayUpPrayers
{
prayer = "Please pray for my dog Rusty. He has cancer",
prayerid = "2",
prayerCategory = "General",
prayerDate = "2017-06-10T21:24:16.1",
handle = "GuruJee",
country = "USA"
};
PrayUpPrayers prayUpPrayers2 = new PrayUpPrayers
{
prayer = "Help Me I need a appendectomy STAT",
prayerid = "1",
prayerCategory = "Sports",
prayerDate = "2017-04-10T20:30:39.77",
handle = "GuruJee",
country = "USA"
};
ThePrayer thePrayer = new ThePrayer
{
prayers = new List<PrayUpPrayers>
{
prayUpPrayers1, prayUpPrayers2
}
};
myDt in your code should be the same as thePrayer instance in my code.
JSONString = JsonConvert.SerializeObject(myDt, Formatting.None);
will provide Json that looks like
"{\"prayers\":[{\"prayer\":\"Please pray for my dog Rusty. He has
cancer\",\"prayerid\":\"2\",\"prayerCategory\":\"General\",\"prayerCategoryID\":null,\"prayerDate\":\"2017-06-10T21:24:16.1\",\"handle\":\"GuruJee\",\"country\":\"USA\"},{\"prayer\":\"Help
Me I need a appendectomy
STAT\",\"prayerid\":\"1\",\"prayerCategory\":\"Sports\",\"prayerCategoryID\":null,\"prayerDate\":\"2017-04-10T20:30:39.77\",\"handle\":\"GuruJee\",\"country\":\"USA\"}]}"
And deserialize will look like
var testing = JsonConvert.DeserializeObject<prayupapp.ModelClasses.ThePrayer>(foo,
new JsonSerializerSettings
{
NullValueHandling = NullValueHandling.Ignore
});

that's simple. you should deserilze the output twice. try this:
var output= DeserializeObject<string>(foo);
var testing = JsonConvert.DeserializeObject<prayupapp.ModelClasses.PrayUpPrayers>(output,
new JsonSerializerSettings
{
NullValueHandling = NullValueHandling.Ignore
});

How to use protobuf-net for xml-serialization?

Maybe i misunderstood something for serialization. i wanna serialize my .net object fastest way. i made some googling i found protobuf. Myfirstquestion is ProtoBuf.Net has avility for xml serailization.if it has, can i use it for xml serialization.
My model:
[XmlType]
public class CT {
[XmlElement(Order = 1)]
public int Foo { get; set; }
}
[XmlType]
public class TE {
[XmlElement(Order = 1)]
public int Bar { get; set; }
}
[XmlType]
public class TD {
[XmlElement(Order = 1)]
public List CTs { get; set; }
[XmlElement(Order = 2)]
public List TEs { get; set; }
[XmlElement(Order = 3)]
public string Code { get; set; }
[XmlElement(Order = 4)]
public string Message { get; set; }
[XmlElement(Order = 5)]
public DateTime StartDate { get; set; }
[XmlElement(Order = 6)]
public DateTime EndDate { get; set; }
}
my serializer :
CT ct = new CT() { Foo = 1 };
List<CT> list = new List<CT>();
list.Add(ct);
TE te = new TE() { Bar = 2 };
List<TE> list2 = new List<TE>();
list2.Add(te);
TD td = new TD() { Code = "Test",Message = "Yusuf",StartDate = DateTime.Now,EndDate = DateTime.Now,CTs = list,TEs = list2 };
List<TD> list3 = new List<TD>();
list3.Add(td);
Stopwatch stopwatch5 = new Stopwatch();
stopwatch5.Start();
string str = String.Empty;
using (MemoryStream stream = new MemoryStream())
{
byte[] data = Serialize(list3);
XmlDocument doc = new XmlDocument();
string xml = Encoding.UTF8.GetString(data); <--SHOULD CREATE XML
doc.LoadXml(xml);
// str = Convert.ToBase64String(stream.GetBuffer(),0,(int)stream.Length);
}
stopwatch5.Stop();
Console.WriteLine(((double)(stopwatch5.Elapsed.TotalMilliseconds * 1000000) / 1000000).ToString("0.00 ns"));
Console.Read();
}
public static byte[] Serialize(List<TD> tData) {
using(var ms = new MemoryStream()) {
ProtoBuf.Serializer.Serialize(ms,tData);
return ms.ToArray();
}
}
public static List<TD> Deserialize(byte[] tData) {
using(var ms = new MemoryStream(tData)) {
return ProtoBuf.Serializer.Deserialize<List<TD>>(ms);
}
}
it should create xml as a result of " string xml = Encoding.UTF8.GetString(data);". But doesn't. How can i produxe xml result?

Protocol buffers doesn't serialize objects to XML.
It produces binary data. And it has its own set of attributes.
Check this answer
Is Protobuf-net's serialization/deserialization faster than XML ? Yes, by far.
However XmlSerializer is fast enough for most of the tasks.
What you should remind when using it though, is:
XmlSerializer instance is generating code on the fly and compile this code into an assembly.
This generated assembly is then used to serialize and deserialize your objects really fast.
So you should cache instances of XmlSerializer (and avoid recreating them)
you could add a warm up by calling Serialize and Deserialize in order to initialize inner objects and jit them.
You could even go further by generating the auto-generated assembly by yourself, but then you should remember to regenerate each time you change the objects (It can be automated with a MsBuild Task).
You can also look further optimizations:
On Stack Overflow
With Sgen

You can only have one tag at the root level of your xml. So either TD cannot be a list, or you must have an outer tag around the List. This code works
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Serialization;
using System.IO;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
TD td = new TD()
{
Code = "Test",
Message = "Yusuf",
StartDate = DateTime.Now,
EndDate = DateTime.Now,
CTs = new List<CT>() {
new CT() { Foo = 1},
new CT() { Foo = 2},
new CT() { Foo = 3},
},
TEs = new List<TE>() {
new TE() { Bar = 1},
new TE() { Bar = 2},
new TE() { Bar = 3},
}
};
using (MemoryStream stream = new MemoryStream())
{
byte[] data = Serialize(td);
XmlDocument doc = new XmlDocument();
string xml = Encoding.UTF8.GetString(data);
doc.LoadXml(xml);
// str = Convert.ToBase64String(stream.GetBuffer(),0,(int)stream.Length);
}
}
public static byte[] Serialize(TD tData)
{
using (var ms = new MemoryStream())
{
XmlSerializer serializer = new XmlSerializer(typeof(TD));
serializer.Serialize(ms, tData);
return ms.ToArray();
}
}
public static TD Deserialize(byte[] tData)
{
using (var ms = new MemoryStream(tData))
{
XmlSerializer xs = new XmlSerializer(typeof(TD));
return (TD)xs.Deserialize(ms);
}
}
}
[XmlRoot("CT")]
public class CT
{
[XmlElement(ElementName = "Foo", Order = 1)]
public int Foo { get; set; }
}
[XmlRoot("TE")]
public class TE
{
[XmlElement(ElementName = "Bar", Order = 1)]
public int Bar { get; set; }
}
[XmlRoot("TD")]
public class TD
{
[XmlElement(ElementName = "CTs", Order = 1)]
public List<CT> CTs { get; set; }
[XmlElement(ElementName = "TEs", Order = 2)]
public List<TE> TEs { get; set; }
[XmlElement(ElementName = "Code", Order = 3)]
public string Code { get; set; }
[XmlElement(ElementName = "Message", Order = 4)]
public string Message { get; set; }
[XmlElement(ElementName = "StartDate", Order = 5)]
public DateTime StartDate { get; set; }
[XmlElement(ElementName = "EndDate", Order = 6)]
public DateTime EndDate { get; set; }
}
}
​

Using the Constant Contact C# .net-sdk v2 to create/add

I'm using the official version 2 of the Constant Contact .net-sdk found here.
I've been unable to find methods for the following:
Creating a Contact List
Adding a contact to a Contact List
Removing a contact from a Contact List
Adding multiple contacts to a Contact List
Creating an Email Campaign
These features clearly exist in v2 of the API found here, but seem missing from the SDK.
Any help in accessing this functionality is appreciated.

Create Contact.
try
{
using (var client = new HttpClient())
{
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", "<Replace with your oAuth Token>");
ContactObject cont = new ContactObject
{
first_name = "Deepu",
last_name = "Madhusoodanan"
};
var email_addresses = new List<EmailAddress>
{
new EmailAddress{email_address = "deepumi1#gmail.com"}
};
cont.email_addresses = email_addresses;
cont.lists = new List<List>
{
new List {id = "<Replace with your List Id>"}
};
var json = Newtonsoft.Json.JsonConvert.SerializeObject(cont);
string MessageType = "application/json";
using (var request = new HttpRequestMessage(System.Net.Http.HttpMethod.Post, "https://api.constantcontact.com/v2/contacts?api_key=<Replace with your API key>"))
{
request.Headers.Add("Accept", MessageType);
request.Content = new StringContent(json);
request.Content.Headers.ContentType = System.Net.Http.Headers.MediaTypeHeaderValue.Parse(MessageType);
using (var response = await client.SendAsync(request).ConfigureAwait(false))
{
string responseXml = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
var code = response.StatusCode;
}
request.Content.Dispose();
}
}
}
catch (Exception exp)
{
//log exception here
}
/*Model class*/
public class Address
{
public string address_type { get; set; }
public string city { get; set; }
public string country_code { get; set; }
public string line1 { get; set; }
public string line2 { get; set; }
public string line3 { get; set; }
public string postal_code { get; set; }
public string state_code { get; set; }
public string sub_postal_code { get; set; }
}
public class List
{
public string id { get; set; }
}
public class EmailAddress
{
public string email_address { get; set; }
}
public class ContactObject
{
public List<Address> addresses { get; set; }
public List<List> lists { get; set; }
public string cell_phone { get; set; }
public string company_name { get; set; }
public bool confirmed { get; set; }
public List<EmailAddress> email_addresses { get; set; }
public string fax { get; set; }
public string first_name { get; set; }
public string home_phone { get; set; }
public string job_title { get; set; }
public string last_name { get; set; }
public string middle_name { get; set; }
public string prefix_name { get; set; }
public string work_phone { get; set; }
}
Note : You have to replace oAuth token, API key and List id.
Delete method based on the api document.(http://developer.constantcontact.com/docs/contacts-api/contacts-resource.html?method=DELETE)
Note : I have not tested the delete method yet.
private async Task<string> DeleteContact(string contactId)
{
try
{
using (var client = new HttpClient())
{
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", "<Replace with your oAuth Token>");
using (var request = new HttpRequestMessage(System.Net.Http.HttpMethod.Delete, "https://api.constantcontact.com/v2/contacts/" + contactId + "?api_key=<Replace with your API key>"))
{
using (var response = await client.SendAsync(request).ConfigureAwait(false))
{
response.EnsureSuccessStatusCode();
return await response.Content.ReadAsStringAsync().ConfigureAwait(false);
}
}
}
}
catch (Exception exp)
{
//log exp here
}
return string.Empty;
}

Here is my solution for adding a contact. What I did was combine the code that Deepu provided with the Constant Contact API v2. I also had to remove async and await references because they are incompatible with VS2010. I have not tried DELETE yet...
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Net.Http;
using CTCT.Components.Contacts;
using System.Net.Http.Headers;
/// <summary>
/// Constant Contact Helper Class for POST, PUT, and DELETE
/// </summary>
public class ConstantContactHelper
{
private string _accessToken = ConfigurationManager.AppSettings["ccAccessToken"];
private Dictionary<string, System.Net.Http.HttpMethod> requestDict = new Dictionary<string, System.Net.Http.HttpMethod> {
{"GET", HttpMethod.Get},
{"POST", HttpMethod.Post},
{"PUT", HttpMethod.Put},
{"DELETE", HttpMethod.Delete}
};
private System.Net.Http.HttpMethod requestMethod = null;
private Dictionary<string, ConstantContactURI> uriDict = new Dictionary<string, ConstantContactURI> {
{"AddContact", new ConstantContactURI("contacts")},
{"AddContactList", new ConstantContactURI("lists")},
{"AddEmailCampaign", new ConstantContactURI("campaigns")},
};
private ConstantContactURI URI_Handler = new ConstantContactURI();
private ContactRequestBody RequestBody = new ContactRequestBody();
private const string messageType = "application/json";
public string jsonRequest = null;
public string responseXml = null;
public string status_code = null;
public ConstantContactHelper() {}
public ConstantContactHelper(string methodKey, string uriKey, string firstName, string lastName, string emailAddress, string listId)
{
this.requestMethod = this.requestDict[methodKey];
this.URI_Handler = this.uriDict[uriKey];
this.RequestBody = new ContactRequestBody(firstName, lastName, emailAddress, listId);
}
// Return Response as a string
public void TryRequest()
{
try
{
using (var client = new HttpClient())
{
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", this._accessToken);
var json = Newtonsoft.Json.JsonConvert.SerializeObject(this.RequestBody.contact);
this.jsonRequest = json;
using (var request = new HttpRequestMessage(HttpMethod.Post, this.URI_Handler.fullURI))
{
request.Headers.Add("Accept", messageType);
request.Content = new StringContent(json);
request.Content.Headers.ContentType = System.Net.Http.Headers.MediaTypeHeaderValue.Parse(messageType);
using (var response = client.SendAsync(request))
{
this.responseXml = response.Result.Content.ReadAsStreamAsync().ConfigureAwait(false).ToString();
this.status_code = response.Status.ToString();
}
request.Content.Dispose();
}
}
}
catch(Exception exp)
{
// Handle Exception
this.responseXml = "Unhandled exception: " + exp.ToString();
}
}
}
public class ConstantContactURI
{
private const string baseURI = "https://api.constantcontact.com/v2/";
private const string queryPrefix = "?api_key=";
private string _apiKey = ConfigurationManager.AppSettings["ccApiKey"];
public string fullURI = null;
public ConstantContactURI() {}
public ConstantContactURI(string specificPath)
{
this.fullURI = baseURI + specificPath + queryPrefix + _apiKey;
}
}
public class ContactRequestBody
{
public Contact contact = new Contact();
private List<EmailAddress> email_addresses = new List<EmailAddress>()
{
new EmailAddress{
EmailAddr = "",
Status = Status.Active,
ConfirmStatus = ConfirmStatus.NoConfirmationRequired
}
};
private List<ContactList> lists = new List<ContactList>()
{
new ContactList {Id = ""}
};
public ContactRequestBody() { }
public ContactRequestBody(string firstName, string lastName, string emailAddress, string listId)
{
this.contact.FirstName = firstName;
this.contact.LastName = lastName;
this.email_addresses[0].EmailAddr = emailAddress;
this.contact.EmailAddresses = this.email_addresses;
this.lists[0].Id = listId;
this.contact.Lists = this.lists;
}
}
An Example call from an aspx.cs page looks like this:
ConstantContactHelper requestHelper = new ConstantContactHelper("POST", "AddContact", firstName.Text, lastName.Text, emailBox.Text, listId);
requestHelper.TryRequest();
lbTest.Text = requestHelper.jsonRequest + ", status code:" + requestHelper.status_code + ", xml:" + requestHelper.responseXml;