如何序列化原始json字段? [英] How to serialize a raw json field?

问题描述

我在数据库中有一个存储json字符串的字段 并且我希望当我在json结果中将其返回时，该结果将作为json原始数据返回，并且不与引号引起的字符串扭曲.

I have a field in the db that store a json string and I want that when I return it in a json result that will be returned as json raw data and not warped with quotes as string.

更新1(更多信息): 如果您查看图像字段，则其中包含原始的json字符串值
但是在使用JsonResult对其进行序列化后，会因为使用字符串类型而用引号引起误解， 如何告诉序列化程序将images字段视为原始json数据?

UPDATE 1(More Info): if you looking at the images field it contain a raw json string value
but after serialize it with the JsonResult it get warped with quotes that it ok because is a type of String, how can i tell the serializer to treat the images field as a raw json data?

        var db = new ModelsContainer();
        var res = db.Images.OrderByDescending(i=>i.DateCreated).Skip(skip).Take(take).Select( i => new {
            id = i.Id,
            dateCreated = i.DateCreated,
            images =  i.Images ,
            user = new {
                id = i.User.Id,
                facebookId = i.User.FacebookId,
                displayName = i.User.DisplayName
            },
            tags = i.Tags.Select( t => t.Value )
        }).ToList();

        return Json(res, JsonRequestBehavior.AllowGet);

     [
        {
            "id":"5c528e88-f3a7-4b30-9746-980867325fd1",
            "dateCreated":"\/Date(1364381593000)\/",
            "images":"[{\"source\":\"http://localhost:9242/images/f4956702/6d34/42db/b28a/397d0eaf3097.jpg\",\"width\":237,\"height\":237},{\"source\":\"http://localhost:9242/images/87d47041/1522/4d10/9325/105851aae259.jpg\",\"width\":633,\"height\":633},{\"source\":\"http://localhost:9242/images/2a639272/9067/42fb/83ee/e88f0a0878f8.jpg\",\"width\":547,\"height\":547},{\"source\":\"http://localhost:9242/images/37caa7b2/e183/4efc/96eb/487e556501b2.jpg\",\"width\":1024,\"height\":1024}]",
            "user":{"id":"ea39616d-6ff9-424b-b99b-7bee53e674bb","facebookId":"608215901","displayName":"Yonathan Garti"},
            "tags":["test","test","test"]
        },
        ...
    ]

推荐答案

使用Json.net，您可以定义自己的JsonConverters来应用特定的序列化行为.您可以将其应用于特定类型，或者，如果具有视图模型，则可以应用于特定属性.

With Json.net you can define your own JsonConverters to apply a specific serialization behavior. You may apply it for a specific type or, if you have a view model, a specific property.

在您的情况下，您想使用JsonWriter.WriteRawValue将图像字符串写为原始字符串.

In your case you want to write the Images-string as a raw-string using JsonWriter.WriteRawValue.

即.

public class PlainJsonStringConverter : Newtonsoft.Json.JsonConverter
{
    public override bool CanConvert(Type objectType)
    {
        return objectType == typeof(string);
    }
    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        return reader.Value;
    }
    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        writer.WriteRawValue((string)value);
    }
}

public class MyViewModel
{
    public string id { get; set; }
    [Newtonsoft.Json.JsonConverter(typeof(PlainJsonStringConverter))]
    public string images { get; set; }
    /* ...  */
}

这篇关于如何序列化原始json字段?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！