C# Json序列化和反序列化图片

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1.基础类

 [Serializable]
    public class CBase
    {

        [JsonConverter(typeof(ImageConverter))]
        public Image Img
        { get; set; }
    }

2.定义了JsonConverter，用来把图片转化成Base64格式的可序列化的字符串

public class ImageConverter : Newtonsoft.Json.JsonConverter
    {
        public override bool CanConvert(Type objectType)
        {
            return objectType == typeof(Bitmap);
        }

        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
        {
            var m = new MemoryStream(Convert.FromBase64String((string)reader.Value));
            return (Bitmap)Bitmap.FromStream(m);
        }

        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
        {
            Bitmap bmp = (Bitmap)value;
            MemoryStream m = new MemoryStream();
            bmp.Save(m, System.Drawing.Imaging.ImageFormat.Jpeg);

            writer.WriteValue(Convert.ToBase64String(m.ToArray()));
        }
    }

3.Json序列化

//把对象序列化
string jsonStr = JsonConvert.SerializeObject(obj);  //序列化对象

4.Json反序列化

 public static T ParseJson(string jsonstr)
 {
      return JsonConvert.DeserializeObject(jsonstr);
 }

//直接调用,反序列化到对象
CBase b=ParseJson(jsonstr);