当我尝试使用 Newtonsoft.Json 解析我的 JSON 时出现以下错误
Response result = JsonConvert.DeserializeObject<Response>(unfilteredJSONData);
无法将属性字符串添加到 Newtonsoft.Json.Linq.JObject。对象上已存在同名属性。
我无法控制 JSON 提要,他们只是添加了flags1
和flags2
. 重复的字符串似乎导致了错误,但我对如何解决它没有任何好主意。在添加新字段之前,此代码运行良好。
更新:
第一个错误是由使用过时的 JSON.net 版本引起的。我正在使用的 CMS 系统有一个内置版本,它是 3.5。当我使用 4.5 时,我收到一个新错误:
无法将 Newtonsoft.Json.Linq.JValue 添加到 Newtonsoft.Json.Linq.JObject。
事实证明,我下面的 JSON 格式与我正在处理的格式不完全相同。请注意更新。错误似乎是在这里引起的:
"flags1": {
"string": "text",
"string": "text"
},
JSON是:
{
"result":
{
"lookups":
[
{
"groups":
[
{
"item0": "text",
"item1": "text",
"item2": 0,
"item3": 0,
"item4": 11.5,
"item5": true
},
{
"item6": "text",
"oddName": "text"
},
{
"item7": {
"subitem0": "text",
"subitem1": 0,
"subitem2": true
},
"item8": {
"subitem0": "string",
"subitem1": 0,
"subitem2": true
}
},
{
"url": "http://google.com",
"otherurl": "http://yahoo.com",
"alturllist": [],
"altotherurl": []
},
{},
{
"flags1": {
"string": "text"
},
"flags2": {
"string": "text"
}
}
]
},
{
"groups":
[
{
"item0": "text",
"item1": "text",
"item2": 0,
"item3": 0,
"item4": 11.5,
"item5": true
},
{
"item6": "text",
"oddName": "text"
},
{
"item7": {
"subitem0": "text",
"subitem1": 0,
"subitem2": true
},
"item8": {
"subitem0": "string",
"subitem1": 0,
"subitem2": true
}
},
{
"url": "http://google.com",
"otherurl": "http://yahoo.com",
"alturllist": [],
"altotherurl": []
},
{},
{
"flags1": {
"string": "text",
"string": "text"
},
"flags2": {}
}
]
}
]
}
}
C# 类是:
// response
[DataContract]
public class Response
{
[DataMember(Name = "result")]
public Result result { get; set; }
}
[DataContract]
public class Result
{
[DataMember(Name = "lookups")]
public List<Item> lookups { get; set; }
}
[DataContract]
public class Item
{
[DataMember(Name = "groups")]
public List<Dictionary<string, object>> groups { get; set; }
}
为了清楚起见,我简化了 JSON 和代码示例。
我包含了代码 aspx 以简化复制。
测试.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Test.aspx.cs" Inherits="Test" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<code>
<%=response %>
</code></div>
</form>
</body>
</html>
测试.aspx.cs
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Runtime.Serialization;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using NLog;
public partial class Test : System.Web.UI.Page
{
public string response = string.Empty;
public static string cacheDirPath = HttpRuntime.AppDomainAppPath + "cache\\";
private static Logger log = LogManager.GetLogger("productFeed");
protected void Page_Load(object sender, EventArgs e)
{
response = readDataFromFile(cacheDirPath + "test2.json");
Response masheryResult = JsonConvert.DeserializeObject<Response>(response);
}
private string readDataFromFile(string filePath)
{
string JSONData = string.Empty;
try
{
StreamReader myFile = new StreamReader(filePath);
JSONData = myFile.ReadToEnd();
myFile.Close();
}
catch (Exception e)
{
log.Warn(e.Message);
}
return JSONData;
}
}
// response
[DataContract]
public class Response
{
[DataMember(Name = "result")]
public Result result { get; set; }
}
[DataContract]
public class Result
{
[DataMember(Name = "lookups")]
public List<Item> lookups { get; set; }
}
[DataContract]
public class Item
{
[DataMember(Name = "groups")]
public List<Dictionary<string, object>> groups { get; set; }
}