having trouble understanding how to use json.net

Question

I've been reading for hours and still can't figure out how to use this under my button I have

 WebClient wc = new WebClient(); Uri uri = new Uri("url"); string json = wc.DownloadString(uri); var a = JsonConvert.DeserializeObject<RootObject>(json);

and the classes

 public class Shares { public int valid { get; set; } public int invalid { get; set; } public int id { get; set; } public int donate_percent { get; set; } public int is_anonymous { get; set; } public string username { get; set; } } public class Transactions { public double Credit { get; set; } public double Debit_MP { get; set; } public double Fee { get; set; } public int TXFee { get; set; } } public class Data { public string username { get; set; } public Shares shares { get; set; } public int hashrate { get; set; } public string sharerate { get; set; } public Transactions transactions { get; set; } } public class Getuserstatus { public string version { get; set; } public double runtime { get; set; } public Data data { get; set; } } public class RootObject { public Getuserstatus getuserstatus { get; set; } }

I did a messagebox to check the string from the URL and all the data is there but it doesn't put it into the fields when I call them they're all empty

 Shares Share = new Shares(); textBox1.Text += "Username: " + Share.username;

edit: ok I got it working the a.getsuerstatus.data.shares.username is not valid in the api I don't know why jsontocsharp site added it but all the data is there username is actually a.getuserstatus.data.username thank you all for the help or I would have still be trying to call data using Shares Share = new Shares()

Can you post sample json from the API? If class definitions don't correctly match the schema of the json it won't work. I can correct them if that is the case :) — evanmcdonnal
– evanmcdonnal, Commented Dec 19, 2013 at 18:04
{"getuserstatus":{"version":"1.0.0","runtime":201.36690139771,"data":{"username":"snow","shares":{"valid":0,"invalid":0,"donate_percent":0,"is_anonymous":0},"hashrate":0,"sharerate":"0.0000","transactions":{"Credit":5592.5516587,"Debit_MP":5456.48342204,"Fee":27.96275827,"TXFee":100}}}} — Michael Marshall
– Michael Marshall, Commented Dec 19, 2013 at 18:05

Mike Dinescu · Accepted Answer · 2013-12-19 18:11:51Z

The following code:

Shares Share = new Shares(); textBox1.Text += "Username: " + Share.username;

creates a new instance of an object of type Shares which has the username property initialized to an empty string.

There is no connection with the json-formatted text you'd like to parse.

The method that you are using to parse the json string: var a = JsonConvert.DeserializeObject<RootObject>(json); expects to generate an object of type RootObject

You will want to set the Text property of textbox1 equal to the corresponding Shares object that is deserialized into a.

 textbox1.Text = a.getUserStatus.data.shares.username;

I tried this textBox1.Text += "Username: '" + a.getuserstatus.data.shares.username + "'"; and I get Username: '' in the textbox

evanmcdonnal · Accepted Answer · 2013-12-19 18:42:17Z

The problem isn't the deserialization, it's this;

 Shares Share = new Shares(); textBox1.Text += "Username: " + Share.username;

which instead needs to be

 textBox1.Text += "Username: " + a.getUserStatus.data.username;

a is the object instantiated by json.NET. You need to go through all the indirection to access the value of username, not just allocated a new Share instance and access it's username, the two references point to entirely different objects.

I tried this textBox1.Text += "Username: '" + a.getuserstatus.data.shares.username + "'"; and I get Username: '' in the textbox
@MichaelPinkiePieMarshall I have a theory, are you sure you don't want a.getUserStatus.data.username? data has a username property which is set in the json example you posted. I don't see one for share, I was just basing that off your class definitions. I edited my post, I think that will work. If not I'd double check your model against the json and make sure it matches exactly.

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