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How to deserialize JSON with duplicate property names in the same object

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长发绾君心
长发绾君心 2020-11-29 12:24

I have a JSON string that I expect to contain duplicate keys that I am unable to make JSON.NET happy with.

I was wondering if anybody knows the best way (maybe usin

3条回答
  • 春和景丽
    春和景丽 (楼主)
    2020-11-29 13:06

    Brian Rogers - Here is the helper function of the JsonConverter that I wrote. I modified it based on your comments about how a JsonTextReader is just a forward-reader doesn't care about duplicate values.

    private static object GetObject(JsonReader reader)
{
    switch (reader.TokenType)
    {
        case JsonToken.StartObject:
        {
            var dictionary = new Dictionary();

            while (reader.Read() && (reader.TokenType != JsonToken.EndObject))
            {
                if (reader.TokenType != JsonToken.PropertyName)
                    throw new InvalidOperationException("Unknown JObject conversion state");

                string propertyName = (string) reader.Value;

                reader.Read();
                object propertyValue = GetObject(reader);

                object existingValue;
                if (dictionary.TryGetValue(propertyName, out existingValue))
                {
                    if (existingValue is List)
                    {
                        var list = existingValue as List;
                        list.Add(propertyValue);
                    }
                    else
                    {
                        var list = new List {existingValue, propertyValue};
                        dictionary[propertyName] = list;
                    }
                }
                else
                {
                    dictionary.Add(propertyName, propertyValue);
                }
            }

            return dictionary;
        }
        case JsonToken.StartArray:
        {
            var list = new List();

            while (reader.Read() && (reader.TokenType != JsonToken.EndArray))
            {
                object propertyValue = GetObject(reader);
                list.Add(propertyValue);
            }

            return list;
        }
        default:
        {
            return reader.Value;
        }
    }
}

    
    
             
    
                                                        
    
            
            
    
              
                
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