c#JSONPatch不使用int和enums

时间:2016-03-02 10:43:09

标签: c# asp.net asp.net-mvc asp.net-web-api json.net

我尝试实现ASP.NET MVC 5 WebAPI补丁。但是int值和枚举存在问题。 JSON反序列化“思考”哪个更好地将int转换为long,所以因为在我的int属性中我总是认为0 ...

所以我找到了“Microsoft.AspNet.JsonPatch.JsonPatchDocument”(还有很多其他人出版)

然后问题是,我在我的模型中总是无效

public async Task<IHttpActionResult> Patch( int id, [FromBody] Microsoft.AspNet.JsonPatch.JsonPatchDocument<Customer> model)
{
    //model is allways == null
}

我正在使用POSTMAN将补丁发送为Body&gt; Raw中的json。标题是application / json。

我不明白为什么模型为null ...我需要在WebApiConfig上做任何事情?

我仍然尝试实现自定义JsonConverter,但问题是我有很多枚举类型,我需要为每个枚举创建一个?我试着这样做:

 public class Int32EnumConverter<T> : JsonConverter

但问题出在WebApiConfig.cs中,你需要实现这个:

config.Formatters.JsonFormatter.SerializerSettings.Converters.Add(new Int32EnumConverter<[I NEED HEAR Dynamic Enum Types>>);    

有没有人帮助我?谢谢!

1 个答案:

答案 0 :(得分:1)

实测值!我在Delta Patch上做了我的

 public class JSONPatch<T>
    {
        private Dictionary<string, object> propsJson = new Dictionary<string, object>();

        public JSONPatch()
        {
            Stream req = HttpContext.Current.Request.InputStream;
            req.Seek(0, System.IO.SeekOrigin.Begin);
            string json = new StreamReader(req).ReadToEnd();
            propsJson = JsonConvert.DeserializeObject<Dictionary<string, object>>(json);
        }

        public JSONPatch(object model)
        {
            propsJson = JsonConvert.DeserializeObject<Dictionary<string, object>>(model.ToString());
        }

        public void Patch(T model)
        {

            PropertyInfo[] properties = model.GetType().GetProperties();

            foreach (PropertyInfo property in properties)
            {
                try
                {
                    if (!propsJson.Any(x => x.Key.Equals(property.Name, StringComparison.InvariantCultureIgnoreCase)))
                        continue;

                    KeyValuePair<string, object> item = propsJson.First(x => x.Key.Equals(property.Name, StringComparison.InvariantCultureIgnoreCase));

                    Type targetProp = model.GetType().GetProperty(property.Name).PropertyType;

                    Type targetNotNuable = Nullable.GetUnderlyingType(targetProp);

                    if (targetNotNuable != null)
                    {
                        targetProp = targetNotNuable;
                    }


                    if (item.Value.GetType() != typeof(Int64))
                    {

                        object newA = Convert.ChangeType(item.Value, targetProp);

                        model.GetType().GetProperty(property.Name).SetValue(model, newA, null);

                    }
                    else
                    {
                        int value = Convert.ToInt32(item.Value);

                        if (targetProp.IsEnum)
                        {
                            object newA = Enum.Parse(targetProp, value.ToString());
                            model.GetType().GetProperty(property.Name).SetValue(model, newA, null);
                        }
                        else
                        {
                            object newA = Convert.ChangeType(value, targetProp);
                            model.GetType().GetProperty(property.Name).SetValue(model, newA, null);
                        }

                    }

                }
                catch
                {

                }


            }
        }

    }

现在:

  public async Task<IHttpActionResult> Patch( int id, [FromBody]JSONPatch<Customer> model)
        {
....

注意:未经过100%测试!空值失败。