当我尝试反序列化以下简单的json字符串时遇到一个奇怪的错误:
{ "items": [ "IZ01", "MTSQ", "VM16", "CR05" ]}
我从json.net dll获得的错误如下:
Invalid property identifier character: &. Path '', line 1, position 2.
完整堆栈跟踪如下:
at Newtonsoft.Json.JsonTextReader.ParseProperty() at Newtonsoft.Json.JsonTextReader.ParseObject() at Newtonsoft.Json.JsonTextReader.ReadInternal() at Newtonsoft.Json.JsonTextReader.Read() at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CheckedRead(JsonReader reader) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent) at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType) at Metastorm.Runtime.Models.SIMSCommonLib.UtilitiesLib.JSONDeserialize(String jsonText, Type valueType) at Metastorm.Runtime.Models.JobProject.ExternalExtendedHelper.GetMaintenanceCodesForVehicle(String LPEntityCode, String UMC, String VIN, String EquipmentList)
这是我用于反序列化json字符串的方法:
public static object JSONDeserialize(string jsonText, Type valueType)
{
Newtonsoft.Json.JsonSerializer json = new Newtonsoft.Json.JsonSerializer();
json.NullValueHandling = Newtonsoft.Json.NullValueHandling.Ignore;
json.ObjectCreationHandling = Newtonsoft.Json.ObjectCreationHandling.Replace;
json.MissingMemberHandling = Newtonsoft.Json.MissingMemberHandling.Ignore;
json.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;
StringReader sr = new StringReader(jsonText);
Newtonsoft.Json.JsonTextReader reader = new JsonTextReader(sr);
object result = json.Deserialize(reader, valueType);
reader.Close();
return result;
}
我只在我们的应用程序的UAT环境中遇到此问题。奇怪的是,相同的代码和相同的数据在我们的开发和测试环境中正常工作。
任何想法为什么json.net报告字符“&”的问题? 它似乎没有多大意义......
答案 0 :(得分:3)
我设法自己解决了这个问题。
事实证明,我发送给方法'JSONDeserialize'的字符串是HTML编码的。
JSON字符串,而不是以下内容:
{ "items": [ "IZ01", "MTSQ", "VM16", "CR05" ]}
实际上是以下内容:
{ "items": [ "IZ01", "MTSQ", "VM16", "CR05" ]}
为了解决这个问题,我更新了'JSONDeserialize'方法,如下所示:
public static object JSONDeserialize(string jsonText, Type valueType)
{
// HTML-decode the string, in case it has been HTML encoded
jsonText = System.Web.HttpUtility.HtmlDecode(jsonText);
Newtonsoft.Json.JsonSerializer json = new Newtonsoft.Json.JsonSerializer();
json.NullValueHandling = Newtonsoft.Json.NullValueHandling.Ignore;
json.ObjectCreationHandling = Newtonsoft.Json.ObjectCreationHandling.Replace;
json.MissingMemberHandling = Newtonsoft.Json.MissingMemberHandling.Ignore;
json.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;
StringReader sr = new StringReader(jsonText);
Newtonsoft.Json.JsonTextReader reader = new JsonTextReader(sr);
object result = json.Deserialize(reader, valueType);
reader.Close();
return result;
}