将对象的属性为数值型的转换为String

将对象的属性为数值型的转换为String

1、新建一个类

//注意：此处为待转换的类型，return true 不好用，必须将待转换的类型一一列出

using Newtonsoft.Json;

namespace WinFormsApp1.Common
{
    public class ToStringConverter : JsonConverter
    {
        public override bool CanConvert(Type objectType)
        {
            //注意：此处为待转换的类型，return true 不好用，必须将待转换的类型一一列出
            return typeof(int).IsAssignableFrom(objectType) || typeof(double).IsAssignableFrom(objectType) || typeof(decimal).IsAssignableFrom(objectType);
        }

        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
        {
            throw new NotImplementedException();
        }

        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
        {
            if (value == null)
            {
                writer.WriteValue(value);
            }
            else
            {
                writer.WriteValue(value.ToString());
            }
        }
    }
}

2、用法 

using Newtonsoft.Json;

        private void button4_Click(object sender, EventArgs e)
        {
            TestParam param = new TestParam();
            param.Name = "kkkkk";
            param.Value = 33333;
            
            string p = JsonConvert.SerializeObject(param, new ToStringConverter());
            textBox4.Text = p;
        }

3、测试类声明

    public class TestParam
    {
        public string Name { get; set; }
        public decimal Value { get; set; }
    }

4、运行结果