JSON字符串编码两次? [英] JSON string encoded twice?

问题描述

我的Web API(生成JSON的代码)正在生成以下JSON字符串.如果我没记错的话，它似乎已经被编码了两次:

My Web API (code that generates JSON) is generating the following JSON string. It seems, if I am not wrong, that it has been encoded twice:

"\"[{\\\"SportID\\\":1,\\\"SportName\\\":\"Tennis\\\"},{\"SportID\\\":2,\\\"SportName\\\":\\\"Footbal\\\"},{\"SportID\\\":3,\"SportName\":\\\"Swimming\\\"}]\""

Web API代码:

Web API code:

public string JSONTest()
{
    List<Sport> sports = new List<Sport>();
    sports.Add(new Sport() { SportID = 1, SportName = "Tennis" });
    sports.Add(new Sport() { SportID = 2, SportName = "Footbal" });
    sports.Add(new Sport() { SportID = 3, SportName = "Swimming" });

    try
    {      
      return JsonConvert.SerializeObject(sports);        
    }
    catch (Exception ex) { }            
}

Sport类:

public class Sport { public int SportID { get; set; } public string SportName { get; set; } }

获取JSON的屏幕截图:

Screenshot of getting JSON:

下面的行给我一个错误，我认为是由于两次编码:

The following line gives me an error, I think because of twice encoding:

var JavaScriptSerializerResult = (new JavaScriptSerializer()).Deserialize< List<Sport>>(jsonResponse);

如果尝试此操作，我会得到相同的错误:

I get the same error if try with this:

  var jsonConvertResult = JsonConvert.DeserializeObject<List<Sport>>(jsonResponse);

如何修复我的Web API使其不进行两次编码，或者如果这不是问题，那么如何解码此JSON?

How can I fix my Web API to not encode twice, or if that is not the problem, how can I decode this JSON?

推荐答案

我认为您应该尝试JsonConvert.DeserializeObject反序列化JSON:

I think you should try JsonConvert.DeserializeObject to deserialize the JSON:

public class Sport
{
    // Dummy "Sport" class as it was not mentioned by OP.
    public int SportID { get; set; }
    public string SportName { get; set; }
}

我将序列化的JSON作为:

I get serialized JSON as:

反序列化它:

string json = JSONTest();
var obj = JsonConvert.DeserializeObject<List<Sport>>(json);

输出:

更新:

根据OP的共享JSON(从服务器接收)，可以使用以下方式删除编码:

As per OP's shared JSON (which is being received from server), encoding can be removed by using:

private string RemoveEncoding(string encodedJson)
{
    var sb = new StringBuilder(encodedJson);
    sb.Replace("\\", string.Empty);
    sb.Replace("\"[", "[");
    sb.Replace("]\"", "]");
    return sb.ToString();
}

通过以下方式反序列化它:

Deserialize it by:

string js = "\"[{\\\"SportID\\\":1,\\\"SportName\\\":\"Tennis\\\"},{\"SportID\\\":2,\\\"SportName\\\":\\\"Footbal\\\"},{\"SportID\\\":3,\"SportName\":\\\"Swimming\\\"}]\"";

string res = RemoveEncoding(js);
var obj = JsonConvert.DeserializeObject<List<Sport>>(res);

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