Develop Reference

Converting string to JArray

I have to use an API that expects a string containing a an array of json objects.
internal string InitConnect( string RequestData )
{
try
{
dynamic filejsonJarray = new JArray();
filejsonJarray = JArray.Parse(RequestData);
JObject jsonObject = (JObject)filejsonJarray.First;
if (jsonObject.ContainsKey("IP_ADDRESS".ToUpper()))
{
...
}
}
}
In my code I tried different ways of calling this API but don't seem to be able to get the argument right. I have to create an object (connData) using data I have read from a config file (sJSONConfig) and use it as an argument to API; last thing I tried:
string sJSONConfig = Global.ReadJsonConfig();
// returns"{\r\n \"Name\": \"BLAH\",\r\n \"IPAddress\": \"1.2.3.4\",\r\n \"Port\": \"5880\"\r\n}"
JArray filejsonJarray = new JArray();
JObject jsonObject = new JObject();
jsonObject = JObject.Parse(sSJONConfig);
//filejsonJarray = JArray.Parse(sSJONConfig);
//jsonObject = (JObject)filejsonJarray.First;
// Reconnect using new config data
var connData = new
{
NAME = jsonObject.Property("Name").Value.ToString(),
IP_ADDRESS = jsonObject.Property("IPAddress").Value.ToString(),
PORT = jsonObject.Property("Port").Value.ToString(),
Enabled = "true",
Something = "false"
};
string reqData = JsonConvert.SerializeObject(filejsonJarray);
//filejsonJarray.Add(reqData);
InitConnect(reqData);
Obviously, I cannot changed the InitConnect API.

You can create your desired JSON like this:
string sJSONConfig = Global.ReadJsonConfig();
JObject jsonObject = JObject.Parse(sJSONConfig);
JObject connData = new JObject(
new JProperty("NAME", jsonObject["Name"]),
new JProperty("IP_ADDRESS", jsonObject["IPAddress"]),
new JProperty("PORT", jsonObject["Port"]),
new JProperty("Enabled", "true"),
new JProperty("Something", "false")
);
JArray filejsonJarray = new JArray(connData);
string reqData = filejsonJarray.ToString();
InitConnect(reqData);

How do I deserialize an array of JSON objects to a C# anonymous type?

I have no problem deserializing a single json object
string json = #"{'Name':'Mike'}";
to a C# anonymous type:
var definition = new { Name = ""};
var result = JsonConvert.DeserializeAnonymousType(json, definition);
But when I have an array:
string jsonArray = #"[{'Name':'Mike'}, {'Name':'Ben'}, {'Name':'Razvigor'}]";
I am stuck.
How can it be done?

The solution is:
string json = #"[{'Name':'Mike'}, {'Name':'Ben'}, {'Name':'Razvigor'}]";
var definition = new[] { new { Name = "" } };
var result = JsonConvert.DeserializeAnonymousType(json, definition);
Of course, since result is an array, you'll access individual records like so:
string firstResult = result[0].Name;
You can also call .ToList() and similar methods on it.

You can deserialize to dynamic object by this.
dynamic result = JsonConvert.DeserializeObject(jsonArray);

One approach is to put an identifier in your JSON array string.
This code worked for me:
var typeExample = new { names = new[] { new { Name = "" } } };
string jsonArray = #"{ names: [{'Name':'Mike'}, {'Name':'Ben'}, {'Name':'Razvigor'}]}";
var result = JsonConvert.DeserializeAnonymousType(jsonArray, typeExample);

Auth0 Facebook Graph cant get email

I have the following code that supposedly gets the users "email". "fistname", "lastname", "id" and "gender":
var request = new OAuth2Request("GET", new Uri("https://graph.facebook.com/me?fields=first_name,last_name,gender,email"), null, eventArgs.Account);
var response = await request.GetResponseAsync();
var obj = JObject.Parse(response.GetResponseText());
var id = obj["id"].ToString().Replace("\"", "");
var firstname = obj["first_name"].ToString().Replace("\"", "");
var lastName = obj["last_name"].ToString().Replace("\"", "");
var gender = obj["gender"].ToString().Replace("\"", "");
var email = obj["email"].ToString().Replace("\"", "");
I am able to get every thing properly except the email field, which is null. Am i treating the string wrongly, or is my Uri incorrect to begin with ?

c# Json Deserialization expression

maybe someone know the solution. I can't deserialize expression.
Client side:
var expresion= (Expression<Func<Company, bool>>)(model => model.Id ==id);
var respond = new JObject();
respond .Add("Expression", JToken.FromObject(expresion));
Server side:
JsonSerializer serializer = new JsonSerializer();
serializer.ConstructorHandling = ConstructorHandling.AllowNonPublicDefaultConstructor;
T p = (T)serializer.Deserialize(new JTokenReader(jObject), typeof(T));
Exception:
{"Unable to find a constructor to use for type System.Linq.Expressions.Expression`1[System.Func`2[HostStorageModels.Company,System.Boolean]]. A class should either have a default constructor, one constructor with arguments or a constructor marked with the JsonConstructor attribute. Path 'Expression.Type'."}

I think that it is explicitly telling you that there is no constructor to build the Expression. If you check Expression Constructor () in the MSDN documentation, you will see that it is protected. You could try to send the expression in other serializable format and re build it when you receive it at the other side.

https://github.com/6bee/Remote.Linq
var query = (Expression<Func<Person, bool>>)(model => model.FirstName == "test2");
var remoteExpression = query.ToRemoteLinqExpression();
var request = new Request<Person>
{
Items = new List<Person>()
{
new Person() { FirstName = "test", Id = 1 },
new Person() { FirstName = "test2", Id = 2 }
},
Expression = remoteExpression
};
var serializerSettings = new JsonSerializerSettings { TypeNameHandling = TypeNameHandling.Auto };
string jsonString = JsonConvert.SerializeObject(request, serializerSettings);
var result = JsonConvert.DeserializeObject<Request<Person>>(jsonString, serializerSettings);
var expresion = result.Expression.ToLinqExpression<Person, bool>();
var filtered = request.Items.Where(expresion.Compile()).ToList();

Get Posts (Wall Facebook) of me and my friends

I use
https://developers.facebook.com/tools/access_token/
I create an App. I want get Posts of the wall of me and my friends.
I try me/feed and me/posts but I get nothing.
I have this unit test.
Any suggestions?
[TestMethod]
public void Basic_using_SDK()
{
// http://blog.prabir.me/posts/facebook-csharp-sdk-making-requests
var fb = new Facebook.FacebookClient();
var result = (IDictionary<string, object>)fb.Get("4");
var id = (string)result["id"];
var name = (string)result["name"];
var firstName = (string)result["first_name"];
var lastName = (string)result["last_name"];
var link = (string)result["link"];
var username = (string)result["username"];
var gender = (string)result["gender"];
var male = (string)result["locale"];
var parameters = new Dictionary<string, object>();
parameters["fields"] = "id,name";
result = (IDictionary<string, object>)fb.Get("4", parameters);
id = (string)result["id"];
name = (string)result["name"];
dynamic result2 = fb.Get("4");
id = result2.id;
name = result2.name;
firstName = result2.first_name;
lastName = result2.last_name;
link = result2.link;
username = result2.username;
gender = result2.gender;
male = result2.locale;
dynamic parameters2 = new ExpandoObject();
parameters2.fields = "id,name";
dynamic result3 = fb.Get("4", parameters);
id = result3.id;
name = result3.name;
dynamic me = fb.Get("zuck");
firstName = me.first_name;
lastName = me.last_name;
var client = new FacebookClient(AccessToken);
dynamic me2 = client.Get("me");
string aboutMe = me2.about;
dynamic result4 = client.Get("/me/feed");
foreach (dynamic post in result4.data)
{
var fromName = post.from.name;
Console.WriteLine(fromName);
}
dynamic result5 = client.Get("/me/posts");
for (int i = 0; i < result5.Count; i++)
{
}
// https://www.facebook.com/profile.php?id=xxxxxxx
// https://graph.facebook.com/xxxxxxx
var uidKiquenet = "xxxxx";
var query = string.Format(#"SELECT status_id,message,time,source,uid,place_id
FROM status WHERE uid IN (SELECT uid FROM status WHERE uid = '" + uidKiquenet + "') ORDER BY time DESC");
dynamic parameters6 = new ExpandoObject();
parameters6.q = query;
dynamic results6 = fb.Get("/xxxxx?fields=id,name,age_range,about,email,first_name,gender");
string myMessage = "Hello from Test";
fb.PostTaskAsync("me/feed", new { message = myMessage }).ContinueWith(t =>
{
if (!t.IsFaulted)
{
string message = "Great, your message has been posted to you wall!";
Console.WriteLine(message);
}
});
fb.GetTaskAsync("me").ContinueWith(t =>
{
if (!t.IsFaulted)
{
var result11 = (IDictionary<string, object>)t.Result;
string myDetails = string.Format("Your name is: {0} {1} and your Facebook profile Url is: {3}",
(string)result11["first_name"], (string)result11["last_name"],
(string)result11["link"]);
Console.WriteLine(myDetails);
}
});
// This uses Facebook Query Language
// See https://developers.facebook.com/docs/technical-guides/fql/ for more information.
query = string.Format("SELECT uid,name,pic_square FROM user WHERE uid IN (SELECT uid2 FROM friend WHERE uid1={0}) ORDER BY name ASC", "me()");
fb.GetTaskAsync("fql", new { q = query }).ContinueWith(t =>
{
if (!t.IsFaulted)
{
var result1 = (IDictionary<string, object>)t.Result;
var data = (IList<object>)result1["data"];
var count = data.Count;
var message = string.Format("You have {0} friends", count);
Console.WriteLine(message);
foreach (IDictionary<string, object> friend in data)
Console.WriteLine((string)friend["name"]);
}
});
}

You must authorize with the correct permission in order to get access to feed posts. Try authorizing with user_posts, as it is explained in the docs: https://developers.facebook.com/docs/graph-api/reference/v2.3/user/feed#read
Be aware that this does not get you access to posts of friends, unless they posted on the wall of the authorized user.
About review, you may want to read this: https://developers.facebook.com/docs/facebook-login/review/faqs#what_is_review
Btw, FQL is deprecated and will only work in v2.0 Apps - not in newer ones.

Same thing happened to me . Here is my Solution
I made my project registered on Facebook developer console. Then I did my code same as you but could not get posts / information . After some time i submitted my application for app review to facebook team (it was still in early development phase) and after their feedback I got my code working . So pending Application review can be your issue also . This option is available in application setting . Give it a shot
Update
Another code sample is here
if (Request["code"] == null)
{
Response.Redirect(string.Format("https://graph.facebook.com/oauth/authorize?client_id={0}&redirect_uri={1}&scope={2}",
FB_app_id, Request.Url.AbsoluteUri, FB_scope));
return false;
}
else
{
Dictionary<string, string> tokens = new Dictionary<string, string>();
string url = string.Format("https://graph.facebook.com/oauth/access_token?client_id={0}&redirect_uri={1}&scope={2}&code={3}&client_secret={4}&perms=status_update"
, FB_app_id, Request.Url.AbsoluteUri, FB_scope, Request["code"].ToString(), FB_secret_id);
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
StreamReader rd = new StreamReader(response.GetResponseStream());
string vals = rd.ReadToEnd();
foreach (string token in vals.Split('&'))
{
tokens.Add(token.Substring(0, token.IndexOf('=')), token.Substring(token.IndexOf("=") + 1, token.Length - token.IndexOf('=') - 1));
}
string access_token = tokens["access_token"];
Session["fb_access_token"] = access_token;
return true;
}
}