How to parse Json content from a url with c#?

Question

I made a little example:

public class Test
{
    [JsonProperty(PropertyName = "test1")]
    public String Test1 { get; set; }

    [JsonProperty(PropertyName = "test2")]
    public String Test2 { get; set; }
}

private string url = "http://sample.php";
private List<Test> TestList = new List<Test>();

private async Task<Test> getTestObjects()
{
    var httpClient = new HttpClient();
    var response = await httpClient.GetAsync(url);
}

How do I get the Test objects from the url link into the TestList? Is it the same as reading XML?

Download the json text first, then decode it. This splits your single question into two, how to download, and how to parse. — Lasse V. Karlsen
– Lasse V. Karlsen, Commented Dec 6, 2014 at 20:45

Jason Hitchings · Accepted Answer · 2017-11-03 05:32:52Z

3

A fast and easy way to semi-automate these steps is to:

take the JSON you want to parse and paste it here: http://json2csharp.com/ then copy and paste the resulting into a new class (ex: MyClass) in visual studio.
Rename "RootObject" in the output from json2csharp to "MyClass" or whatever you called it.
In visual studio go to Website -> Manage Packages and use NuGet to add Json.Net from Newtonsoft.

Now use code like:

WebClient client = new WebClient();

string myJSON = client.DownloadString("https://URL_FOR_JSON.com/JSON_STUFF");

var myClass = Newtonsoft.Json.JsonConvert.DeserializeObject(myJSON);

edited Nov 3, 2017 at 5:32

answered Nov 3, 2017 at 5:27

Jason Hitchings

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Comments

Mohamad Shiralizadeh · Accepted Answer · 2014-12-06 21:18:54Z

2

best way to parse json is Json.NET

string json = @"{
  'Name': 'Bad Boys',
  'ReleaseDate': '1995-4-7T00:00:00',
  'Genres': [
    'Action',
    'Comedy'
  ]
}";

Movie m = JsonConvert.DeserializeObject<Movie>(json);

string name = m.Name;
// Bad Boys

I try this code and works:

void Main()
{
    var test = Newtonsoft.Json.JsonConvert.DeserializeObject<Test>(getTestObjects().Result).Dump();

    // test.MyName; 'Bad Boys'
    // test.ReleaseDate; '1995-4-7T00:00:00'
}

public class Test
 {   
     [JsonProperty("Name")]
     public String MyName { get; set; }
     public String ReleaseDate { get; set; }
 }

 private string url = "http://bitg.ir/files/json.txt";
 private List<Test> TestList = new List<Test>();

 private async Task<String> getTestObjects()
 {
     var httpClient = new HttpClient();
     var response = await httpClient.GetAsync(url);
     var result = await response.Content.ReadAsStringAsync();

     return result;
 }

edited Dec 6, 2014 at 21:18

answered Dec 6, 2014 at 20:50

Mohamad Shiralizadeh

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2 Comments

user2970725 Over a year ago

Yes that works indeed! But what is the difference between [JsonProperty(PropertyName = "test1")] public String Test1 { get; set; } and public String Name { get; set; }? I mean the JsonProperty above the Property.

Mohamad Shiralizadeh Over a year ago

@user2970725 I correct the answer. JsonProperty make your property map to a json property if you want names to be different.

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