Issues using Json.NET

Question

I am trying to Use JSON.NET to parse response from an API.

{
    "ok": true,
    "channels": [
        {
            "id": "xxxxx",
            "name": "xx",
            "created": "xxxxx",
            "creator": "xxxxxx",
            "is_archived": false,
            "is_member": false,
            "num_members": 2,
            "is_general": false,
            "topic": {
                "value": "",
                "creator": "",
                "last_set": "0"
            },
            "purpose": {
                "value": "",
                "creator": "",
                "last_set": "0"
            }
        },
        {
            "id": "xxxxx",
            "name": "xxxxx",
            "created": "xxxxxx",
            "creator": "xxxxxxx",
            "is_archived": false,
            "is_member": true,
            "num_members": 3,
            "is_general": true,
            "topic": {
                "value": "",
                "creator": "",
                "last_set": "0"
            },
            "purpose": {
                "value": "xxxxx",
                "creator": "",
                "last_set": "0"
            }
        },
        {
            "id": "xxxx",
            "name": "xxxxxxx",
            "created": "xxxxxx",
            "creator": "xxxxxx",
            "is_archived": false,
            "is_member": false,
            "num_members": 2,
            "is_general": false,
            "topic": {
                "value": "",
                "creator": "",
                "last_set": "0"
            },
            "purpose": {
                "value": "xxxxxxxxx",
                "creator": "",
                "last_set": "0"
            }
        },
        {
            "id": "xxxx",
            "name": "xxxxx",
            "created": "xxxxxx",
            "creator": "xxxxxx",
            "is_archived": false,
            "is_member": true,
            "num_members": 2,
            "is_general": false,
            "topic": {
                "value": "",
                "creator": "",
                "last_set": "0"
            },
            "purpose": {
                "value": "xxxxxx",
                "creator": "xxxxx",
                "last_set": "xxxx"
            }
        }
    ]
}

this is the output of the api. I anonymized everything because of tokens and IDs.

JObject root = JObject.Parse(channelJSON);
foreach (JProperty prop in root["channels"].Children<JProperty>())
{
    JObject Channel = (JObject)prop.Value;
    ChannelList.Add(new SlackChannel(Channel["name"].ToString(), Channel["id"].ToString()));
 }

This is the code I am using. The foreach loop never completes, I placed breakpoints in the loop, but only the foreach line executes, then the code stops. What am I doing wrong. I want to iterate through the json response, getting the name and ID for each channel. I got the C# code from another question, and modified it, but I'm not getting any execution of the code.

Haven't used json.net, but the channels property is an array, so a standard for loop should iterate the array, then for each index of the array, do a for in — tymeJV
– tymeJV, Commented Apr 4, 2014 at 23:57

aloisdg · Accepted Answer · 2014-04-05 00:05:23Z

2

To deserialize a json with Json.Net, you can use this :

Generate a class with your Json and json2csharp :

public class Topic
{
    public string value { get; set; }
    public string creator { get; set; }
    public string last_set { get; set; }
}

public class Purpose
{
    public string value { get; set; }
    public string creator { get; set; }
    public string last_set { get; set; }
}

public class Channel
{
    public string id { get; set; }
    public string name { get; set; }
    public string created { get; set; }
    public string creator { get; set; }
    public bool is_archived { get; set; }
    public bool is_member { get; set; }
    public int num_members { get; set; }
    public bool is_general { get; set; }
    public Topic topic { get; set; }
    public Purpose purpose { get; set; }
}

public class RootObject
{
    public bool ok { get; set; }
    public List<Channel> channels { get; set; }
}

And use this line from the doc :

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

voila.

answered Apr 5, 2014 at 0:05

aloisdg

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5 Comments

Trafz Over a year ago

Thank you for the json2csharp link. Bookmarked for sure.

aloisdg Over a year ago

In fact there is another method to get this without json2csharp. The key is an addon for Visual Studio.

aloisdg Over a year ago

@JoenJ.Olsen He is native in VS2012+ and the addon is Microsoft Web Developer Tools. pic

Trafz Over a year ago

I wonder how I haven't noticed that before now. Thank you for finding it again! Now I'm even able to do it for XML as well, which is quite awesome since I work with XML pretty much every day.

aloisdg Over a year ago

@user3500033 are you sure your json is valid ? are your sure that your string contain the whole json ? By the way, you should read all the code your generate.

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