Question

我第一次尝试飞利浦Hue灯api，我有一些关于如何将json字符串反序列化为C＃对象的问题。我正在尝试使用我正在处理的Xamarin.iOS应用程序。

这是我的方法，可以从我周围获取光数据：

private string getLights()
{
    var url = APIURL + APIKey + LightsEndPoint ; 

    var request = WebRequest.Create(url);
    request.ContentType = "application/json";
    request.Method = "GET";

    using (var response = request.GetResponse() as HttpWebResponse)
    {
        if (response.StatusCode != HttpStatusCode.OK)
            Console.Out.WriteLine(
                "Error fetching data. Server returned status code: {0}",
                response.StatusCode);

        using (var reader = new StreamReader(response.GetResponseStream()))
        {
            var content = reader.ReadToEnd();

            if(string.IsNullOrWhiteSpace(content))
            {
                Console.WriteLine("Response contained empty body...");
            }
            else
            {
                Console.WriteLine("Response Body: \r\n {0}", content);
                var items = JsonConvert.DeserializeObject <Light> (content);            
            }
            return content; 
        }
    }
}

光明在哪里：

public class Light
{
    public Light()
    { }

    public string LightName { get; set;}

    [JsonProperty("state")]
    public string IsOn { get; set; }

    [JsonProperty("sat")]
    public int Saturation { get; set; }

    [JsonProperty("bri")]
    public int Brightness {get;set;} 

    [JsonProperty("hue")]
    public int Hue { get; set; }
}

我现在遇到的问题是我的items对象总是空的，即使我正确地获取内容json字符串也是null值。

我的json字符串看起来像这样：

{  
    "1":{  
        "state":{  
            "on":true,
            "bri":254,
            "hue":20000,
            "sat":100,
            "effect":"none",
            "xy":[  
                 0.4146,
                 0.4155
            ],
            "ct":299,
            "alert":"none",
            "colormode":"hs",
            "reachable":true
        },
        "type":"Extended color light",
        "name":"Hue color lamp 1",
        "modelid":"LCT007",
        "manufacturername":"Philips",
        "uniqueid":"00:17:88:01:10:26:3f:12-0b",
        "swversion":"5.38.1.14919"
    },
    "2":{  
        "state":{  
            "on":false,
            "bri":254,
            "hue":50000,
            "sat":254,
            "effect":"none",
            "xy":[  
                0.2468,
                0.0843
            ],
            "ct":153,
            "alert":"none",
            "colormode":"hs",
            "reachable":true
        },
        "type":"Extended color light",
        "name":"Hue color lamp 2",
        "modelid":"LCT007",
        "manufacturername":"Philips",
        "uniqueid":"00:17:88:01:10:5d:fd:f6-0b",
        "swversion":"5.38.1.14919"
    },
    "3":{  
        "state":{  
            "on":true,
            "bri":254,
            "hue":10000,
            "sat":254,
            "effect":"none",
            "xy":[  
                0.5711,
                0.3986
            ],
            "ct":500,
            "alert":"none",
            "colormode":"hs",
            "reachable":true
        },
        "type":"Extended color light",
        "name":"Hue color lamp 3",
        "modelid":"LCT007",
        "manufacturername":"Philips",
        "uniqueid":"00:17:88:01:10:26:3d:17-0b",
        "swversion":"5.38.1.14919"
    }
}

我遇到的问题是光线由数值表示，我不知道如何拆分json字符串来填充我的c＃对象。

基本上，我在将Xson字符串转换为适用于Xamarin.iOS app的api流的c＃对象时遇到问题。

Answer 1

您的模型应如下所示

public class Light
{

    public Light()
    {

    }

    [JsonProperty("name")]
    public string LightName { get; set;}

    [JsonProperty("state")]
    public State State { get; set; }
}

public class State 
{
    public State() 
    {
    }

    [JsonProperty("on")]
    public bool IsOn { get; set; }

    [JsonProperty("sat")]
    public int Saturation { get; set; }

    [JsonProperty("bri")]
    public int Brightness {get;set;} 

    [JsonProperty("hue")]
    public int Hue { get; set; }
}

反序列化调用看起来应该是这样的

JsonConvert.DeserializeObject<Dictionary<string, Light>>(content);

字典的键是数字，而值是你想要的光模型。

Answer 2

我使用json2csharp生成了一个类：

public class State
{
    public bool on { get; set; }
    public int bri { get; set; }
    public int hue { get; set; }
    public int sat { get; set; }
    public string effect { get; set; }
    public List<double> xy { get; set; }
    public int ct { get; set; }
    public string alert { get; set; }
    public string colormode { get; set; }
    public bool reachable { get; set; }
}

public class RootObject
{
    public State state { get; set; }
    public string type { get; set; }
    public string name { get; set; }
    public string modelid { get; set; }
    public string manufacturername { get; set; }
    public string uniqueid { get; set; }
    public string swversion { get; set; }
}

然后我调用了这段代码：

var a = JsonConvert.DeserializeObject<Dictionary<string, RootObject>>(json);

结果如下：

Answer 3

如上所述，您的模型结构与json的模型结构不匹配。您需要相应地正确嵌套属性。我把一个例子汇总在一起，虽然某些数据类型我不确定我只是使用了一个字符串（应该没问题）。

Light.cs

public class Light
{
    public string LightName { get; set; }

    [JsonProperty("state")]
    public State LightState { get; set; }

    [JsonProperty("type")]
    public string Type { get; set; }

    [JsonProperty("name")]
    public string Name { get; set; }

    [JsonProperty("modelid")]
    public string ModelId { get; set; }

    [JsonProperty("manufacturername")]
    public string Manufacturer { get; set; }

    [JsonProperty("uniqueid")]
    public string UniqueId { get; set; }

    [JsonProperty("swversion")]
    public string SwVersion { get; set; }
}

State.cs

public class State
{
    [JsonProperty("on")]
    public bool IsOn { get; set; }

    [JsonProperty("bri")]
    public int Brightness { get; set; }

    [JsonProperty("hue")]
    public int Hue { get; set; }

    [JsonProperty("sat")]
    public int Saturation { get; set; }

    [JsonProperty("effect")]
    public string Effect { get; set; } // Just making it a string for now

    [JsonProperty("xy")]
    public double[] XY { get; set; }

    [JsonProperty("ct")]
    public int CT { get; set; }

    [JsonProperty("alert")]
    public string Alert { get; set; } // Just making another string for now

    [JsonProperty("colormode")]
    public string ColorMode { get; set; } // Hey, it's another string for now

    [JsonProperty("reachable")]
    public bool Reachable { get; set; }
}

然后反序列化：

var items = JsonConvert.DeserializeObject<Dictionary<string, Light>> (content);

将Json String反序列化为C＃对象

3 个答案: