请为我澄清一些困惑:我有一个JSON字符串,我试图坚持到一个对象,但我只想进入顶层,并将下面的所有内容视为blob或字符串。这样的事情。
这是我的模特:
public class InputJson
{
[JsonProperty(PropertyName = "signals")]
public string signals{ get; set; }
[JsonProperty(PropertyName = "options")]
public string options { get; set; }
[JsonProperty(PropertyName = "fields")]
public string fields{ get; set; }
[JsonProperty(PropertyName = "lapse")]
public string lapse{ get; set; }
}
我试图将JSON字符串(见下文)反序列化为:
InputJson a = JsonConvert.DeserializeObject<InputJson>(body);
我希望a.signals
会返回一个字符串,其中的所有内容都在&#34;信号&#34;之前&#34;选项&#34;,但它失败了,因为它试图前进并序列化它下面的所有内容。我得到了JsonReaderException
:
读取字符串时出错。意外的令牌:StartArray。路径&#39;信号&#39;,第1行,第12位。
我尝试使用JsonSerializerSettings
(比如将maxDepth设置为1),但没有任何帮助。任何人吗?
我的JSON字符串:
{
"signals":
[
{
"name":"1",
"att1":"44",
"att2":"0",
"att3":"18",
"size":10,
"points":[-79,-29,-9,-23,27,-110,-39,-22,-32,-2]
},
{
"name":"2",
"att1":"46",
"att2":"0",
"att3":"12",
"size":10,
"points":[36,37,37,35,38,41,41,45,39,41]
}
],
"options":"opt1 opt2",
"fields":"myfields",
"lapse":"somelapse"
}
答案 0 :(得分:3)
正如您所推测的那样,您收到此错误,因为您的字段是字符串并且反序列化程序找到了一个数组。它不能将数组分配给字符串。
您可以通过将自定义JsonConverter
用于您希望视为“blobs”的字段来解决此问题,我假设您的意思是您只需要原始JSON字符串。
以下是转换器所需的代码:
class BlobJsonConverter: JsonConverter
{
public override bool CanConvert(Type objectType)
{
return (objectType == typeof(string));
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
JToken token = JToken.Load(reader);
return token.ToString(Formatting.None);
}
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
throw new NotImplementedException();
}
}
然后,在您的模型中,使用[JsonConverter]
属性装饰您希望视为“blob”的字符串属性,如下所示:
public class InputJson
{
[JsonProperty(PropertyName = "signals")]
[JsonConverter(typeof(BlobJsonConverter))]
public string signals { get; set; }
[JsonProperty(PropertyName = "options")]
public string options { get; set; }
[JsonProperty(PropertyName = "fields")]
public string fields { get; set; }
[JsonProperty(PropertyName = "lapse")]
public string lapse { get; set; }
}
现在,当您反序列化时,signals
将在“信号”下包含原始JSON,而不是给出错误。
演示:
class Program
{
static void Main(string[] args)
{
string json = @"
{
""signals"":
[
{
""name"":""1"",
""att1"":""44"",
""att2"":""0"",
""att3"":""18"",
""size"":10,
""points"":[-79,-29,-9,-23,27,-110,-39,-22,-32,-2]
},
{
""name"":""2"",
""att1"":""46"",
""att2"":""0"",
""att3"":""12"",
""size"":10,
""points"":[36,37,37,35,38,41,41,45,39,41]
}
],
""options"":""opt1 opt2"",
""fields"":""myfields"",
""lapse"":""somelapse""
}";
InputJson a = JsonConvert.DeserializeObject<InputJson>(json);
Console.WriteLine("signals: " + a.signals);
Console.WriteLine("options: " + a.options);
Console.WriteLine("fields: " + a.fields);
Console.WriteLine("lapse: " + a.lapse);
}
}
输出:
signals: [{"name":"1","att1":"44","att2":"0","att3":"18","size":10,"points":[-79,-29,-9,-23,27,-110,-39,-22,-32,-2]},{"name":"2","att1":"46","att2":"0","att3":"12","size":10,"points":36,37,37,35,38,41,41,45,39,41]}]
options: opt1 opt2
fields: myfields
lapse: somelapse