Question

需要以下JSON响应的帮助。我试着反序列化

JSON响应

{  
"entities":[  
    {  
        "id":"/Severity/Critical",
        "Name":"Critical"
    },
    {  
        "id":"/Severity/High",
        "Name":"High"
    },
    {  
        "id":"/Severity/Low",
        "Name":"Low"
    },
    {  
        "id":"/Severity/Normal",
        "Name":"Normal"
    }
],
"paging":{  
    "from":4,
    "limit":100,
    "hasMore":false
}
}

var severity = JsonConvert.DeserializeObject<Severity>(json);

错误消息

Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'System.Collections.Generic.Dictionary`2[System.String,System.String]' because the type requires a JSON object (e.g. {"name":"value"}) to deserialize correctly.

要修复此错误，请将JSON更改为JSON对象（例如{“name”：“value”}）或将反序列化类型更改为数组或实现集合接口的类型（例如ICollection，IList）可以从JSON数组反序列化的列表。 JsonArrayAttribute也可以添加到类型中，以强制它从JSON数组反序列化。

Answer 1

正如ErrorMessage告诉你的那样，JsonConvert.DeserializeObject无法将您用作输入的JSON转换为对象。为避免这种情况，您可以声明一个特定的类，在该实例中，您的JSON将被反序列化。根据您分享的输入，此类可能如下所示：

public class Severity
{

    [JsonProperty("entities")]
    public List<Entity> Entities { get; set; }

    [JsonProperty("paging")]
    public Paging Paging { get; set; }
}

public class Entity
{
    [JsonProperty("id")]
    public string Id;

    [JsonProperty("Name")]
    public string Name;
}

public class Paging
{
    [JsonProperty("from")]
    public int From { get; set; }

    [JsonProperty("limit")]
    public int Limit { get; set; } 

    [JsonProperty("hasMore")]
    public bool HasMore { get; set; } 
}

然后你可以这样做：

var severity = JsonConvert.DeserializeObject<Severity>(json);

从JSON绑定DropDownList

1 个答案: