Working on an ASP.NET MVC 5 Web Api project.
The application already has multiple APIs in place. Recently, I added a custom JsonConverter to handle date conversions based on timezone.
public class CustomInfoConverter : JsonConverter
{
public override bool CanConvert(Type objectType)
{
return objectType == typeof(CustomType);
}
public override bool CanRead
{
get
{
return false;
}
}
public override bool CanWrite
{
get
{
return true;
}
}
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
var customType = (CustomType)value;
if (customType == null || null== customType.TimeZone) return;
DateTime currentDateTime = DateTime.SpecifyKind(customType.Date ?? DateTime.Now, DateTimeKind.Unspecified);
DateTime userDateTime = TimeZoneInfo.ConvertTimeFromUtc(currentDateTime, customType.TimeZone);
customType.Date = userDateTime;
JsonSerializer innerSerializer = new JsonSerializer();
foreach (var converter in serializer.Converters.Where(c => !(c is CustomInfoConverter)))
{
innerSerializer.Converters.Add(converter);
}
innerSerializer.Serialize(writer, customType);
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
throw new NotImplementedException();
}
}
Since adding this custom JsonConverter, all APIs are functioning correctly except for one that is throwing the following exception:
{"Message":"An error has occurred.","ExceptionMessage":"The 'ObjectContent`1' type failed to serialize the response body for content type 'application/json; charset=utf-8'.","ExceptionType":"System.InvalidOperationException","StackTrace":null,"InnerException":{"Message":"An error has occurred.","ExceptionMessage":"Token PropertyName in state Property would result in an invalid JSON object. Path 'Data.Forms[0]'.","ExceptionType":"Newtonsoft.Json.JsonWriterException","StackTrace":"...}}}
For more information, check out this link.