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Error trying to deserialize json string using json.Net

I meet a strange error when I try to deserialize the following simple json string:

{ "items": [ "IZ01", "MTSQ", "VM16", "CR05" ]}

The error I get from json.net dll is this:

Invalid property identifier character: &. Path '', line 1, position 2.

A full stack trace looks like this:

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)

This is the method I use to deserialize the json string:

    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;
}

I have this problem only in the UAT environment of our application. The strange thing is that the same code and the same data work correctly in our development and testing environments.

Any idea why json.net reports a problem with the & symbol? That doesn't seem to make much sense ...

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1 answer

I managed to solve the problem myself.

, , 'JSONDeserialize', HTML.

JSON :

{ "items": [ "IZ01", "MTSQ", "VM16", "CR05" ]}

:

{ "items": [ "IZ01", "MTSQ", "VM16", "CR05" ]}

, "JSONDeserialize" :

    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;
}
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