我有以下代码:
var user = (Dictionary<string, object>)serializer.DeserializeObject(responsecontent);
responsecontent中的输入是JSON，但它没有正确地反序列化为对象。我应该如何正确地反序列化它?
当前回答
系统。Json现在工作了…
安装 nuget https://www.nuget.org/packages/System.Json
PM> Install-Package System.Json -Version 4.5.0
示例:
// PM>Install-Package System.Json -Version 4.5.0
using System;
using System.Json;
namespace NetCoreTestConsoleApp
{
class Program
{
static void Main(string[] args)
{
// Note that JSON keys are case sensitive, a is not same as A.
// JSON Sample
string jsonString = "{\"a\": 1,\"b\": \"string value\",\"c\":[{\"Value\": 1}, {\"Value\": 2,\"SubObject\":[{\"SubValue\":3}]}]}";
// You can use the following line in a beautifier/JSON formatted for better view
// {"a": 1,"b": "string value","c":[{"Value": 1}, {"Value": 2,"SubObject":[{"SubValue":3}]}]}
/* Formatted jsonString for viewing purposes:
{
"a":1,
"b":"string value",
"c":[
{
"Value":1
},
{
"Value":2,
"SubObject":[
{
"SubValue":3
}
]
}
]
}
*/
// Verify your JSON if you get any errors here
JsonValue json = JsonValue.Parse(jsonString);
// int test
if (json.ContainsKey("a"))
{
int a = json["a"]; // type already set to int
Console.WriteLine("json[\"a\"]" + " = " + a);
}
// string test
if (json.ContainsKey("b"))
{
string b = json["b"]; // type already set to string
Console.WriteLine("json[\"b\"]" + " = " + b);
}
// object array test
if (json.ContainsKey("c") && json["c"].JsonType == JsonType.Array)
{
// foreach loop test
foreach (JsonValue j in json["c"])
{
Console.WriteLine("j[\"Value\"]" + " = " + j["Value"].ToString());
}
// multi level key test
Console.WriteLine("json[\"c\"][0][\"Value\"]" + " = " + json["c"][0]["Value"].ToString());
Console.WriteLine("json[\"c\"][0][\"Value\"]" + " = " + json["c"][1]["Value"].ToString());
Console.WriteLine("json[\"c\"][1][\"SubObject\"][0][\"SubValue\"]" + " = " + json["c"][1]["SubObject"][0]["SubValue"].ToString());
}
Console.WriteLine();
Console.Write("Press any key to exit.");
Console.ReadKey();
}
}
}
其他回答
我假设你没有使用Json。净(Newtonsoft。Json NuGet包)。如果是这样的话，你应该试试。
它具有以下特点:
LINQ到JSON JsonSerializer用于快速将.NET对象转换为JSON并再转换回来 Json。NET可以选择生成格式良好、缩进的JSON以供调试或显示 可以将JsonIgnore和JsonProperty等属性添加到类中，以自定义类的序列化方式 能够将JSON转换为XML 支持多种平台:.NET、Silverlight和Compact Framework
请看下面的例子。在本例中，JsonConvert类用于将对象与JSON进行转换。它有两个用于此目的的静态方法。它们是SerializeObject(Object obj)和DeserializeObject<T>(String json):
using Newtonsoft.Json;
Product product = new Product();
product.Name = "Apple";
product.Expiry = new DateTime(2008, 12, 28);
product.Price = 3.99M;
product.Sizes = new string[] { "Small", "Medium", "Large" };
string json = JsonConvert.SerializeObject(product);
//{
// "Name": "Apple",
// "Expiry": "2008-12-28T00:00:00",
// "Price": 3.99,
// "Sizes": [
// "Small",
// "Medium",
// "Large"
// ]
//}
Product deserializedProduct = JsonConvert.DeserializeObject<Product>(json);
系统。Json现在工作了…
安装 nuget https://www.nuget.org/packages/System.Json
PM> Install-Package System.Json -Version 4.5.0
示例:
// PM>Install-Package System.Json -Version 4.5.0
using System;
using System.Json;
namespace NetCoreTestConsoleApp
{
class Program
{
static void Main(string[] args)
{
// Note that JSON keys are case sensitive, a is not same as A.
// JSON Sample
string jsonString = "{\"a\": 1,\"b\": \"string value\",\"c\":[{\"Value\": 1}, {\"Value\": 2,\"SubObject\":[{\"SubValue\":3}]}]}";
// You can use the following line in a beautifier/JSON formatted for better view
// {"a": 1,"b": "string value","c":[{"Value": 1}, {"Value": 2,"SubObject":[{"SubValue":3}]}]}
/* Formatted jsonString for viewing purposes:
{
"a":1,
"b":"string value",
"c":[
{
"Value":1
},
{
"Value":2,
"SubObject":[
{
"SubValue":3
}
]
}
]
}
*/
// Verify your JSON if you get any errors here
JsonValue json = JsonValue.Parse(jsonString);
// int test
if (json.ContainsKey("a"))
{
int a = json["a"]; // type already set to int
Console.WriteLine("json[\"a\"]" + " = " + a);
}
// string test
if (json.ContainsKey("b"))
{
string b = json["b"]; // type already set to string
Console.WriteLine("json[\"b\"]" + " = " + b);
}
// object array test
if (json.ContainsKey("c") && json["c"].JsonType == JsonType.Array)
{
// foreach loop test
foreach (JsonValue j in json["c"])
{
Console.WriteLine("j[\"Value\"]" + " = " + j["Value"].ToString());
}
// multi level key test
Console.WriteLine("json[\"c\"][0][\"Value\"]" + " = " + json["c"][0]["Value"].ToString());
Console.WriteLine("json[\"c\"][0][\"Value\"]" + " = " + json["c"][1]["Value"].ToString());
Console.WriteLine("json[\"c\"][1][\"SubObject\"][0][\"SubValue\"]" + " = " + json["c"][1]["SubObject"][0]["SubValue"].ToString());
}
Console.WriteLine();
Console.Write("Press any key to exit.");
Console.ReadKey();
}
}
}
试试下面的代码:
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("URL");
JArray array = new JArray();
using (var twitpicResponse = (HttpWebResponse)request.GetResponse())
using (var reader = new StreamReader(twitpicResponse.GetResponseStream()))
{
JavaScriptSerializer js = new JavaScriptSerializer();
var objText = reader.ReadToEnd();
JObject joResponse = JObject.Parse(objText);
JObject result = (JObject)joResponse["result"];
array = (JArray)result["Detail"];
string statu = array[0]["dlrStat"].ToString();
}
以下来自msdn站点的内容应该有助于为您正在寻找的内容提供一些本地功能。请注意，这是针对Windows 8指定的。下面列出了该站点中的一个这样的示例。
JsonValue jsonValue = JsonValue.Parse("{\"Width\": 800, \"Height\": 600, \"Title\": \"View from 15th Floor\", \"IDs\": [116, 943, 234, 38793]}");
double width = jsonValue.GetObject().GetNamedNumber("Width");
double height = jsonValue.GetObject().GetNamedNumber("Height");
string title = jsonValue.GetObject().GetNamedString("Title");
JsonArray ids = jsonValue.GetObject().GetNamedArray("IDs");
它利用了Windows.Data.JSON命名空间。
如果您可以使用。net 4，请查看:http://visitmix.com/writings/the-rise-of-json (archive.org)
以下是该网站的一个片段:
WebClient webClient = new WebClient();
dynamic result = JsonValue.Parse(webClient.DownloadString("https://api.foursquare.com/v2/users/self?oauth_token=XXXXXXX"));
Console.WriteLine(result.response.user.firstName);
最后一个控制台。WriteLine很贴心…
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