JsonConvert.SerializeObject 空值处理

 

?

1 2	var settings = new JsonSerializerSettings() { ContractResolver= new NullToEmptyStringResolver() }; var str = JsonConvert.SerializeObject(yourObj, settings);

　　

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35

public class NullToEmptyStringResolver : Newtonsoft.Json.Serialization.DefaultContractResolver {     protected override IList<JsonProperty> CreateProperties(Type type, MemberSerialization memberSerialization)     {         return type.GetProperties()                 .Select(p =>                 {                     var jp = base.CreateProperty(p, memberSerialization);                     jp.ValueProvider = new NullToEmptyStringValueProvider(p);                     return jp;                 }).ToList();     } }   public class NullToEmptyStringValueProvider : IValueProvider {     PropertyInfo _MemberInfo;     public NullToEmptyStringValueProvider(PropertyInfo memberInfo)     {         _MemberInfo = memberInfo;     }       public object GetValue(object target)     {         object result = _MemberInfo.GetValue(target, null);         if (_MemberInfo.PropertyType == typeof(string) && result == null) result = "";         return result;       }       public void SetValue(object target, object value)     {         _MemberInfo.SetValue(target, value,null);     } }

　　程序员的基础教程：菜鸟程序员