是否有一种简单的方法可以使用通过AJAX传递的JSON对象填充我的C#对象?
这是使用JSON.stringify从页面传递给C#WEBMETHOD的JSON对象
{
"user": {
"name": "asdf",
"teamname": "b",
"email": "c",
"players": ["1", "2"]
}
}
接收JSON对象的C#WebMetod
[WebMethod]
public static void SaveTeam(Object user)
{
}
C#类,表示传入WebMethod
的JSON对象的对象结构public class User
{
public string name { get; set; }
public string teamname { get; set; }
public string email { get; set; }
public Array players { get; set; }
}
答案 0 :(得分:194)
在C#中使用JSON的好方法是使用JSON.NET
来自Quick Starts & API Documentation的JSON.NET - Official site可帮助您解决问题。
如何使用它的一个例子:
public class User
{
public User(string json)
{
JObject jObject = JObject.Parse(json);
JToken jUser = jObject["user"];
name = (string) jUser["name"];
teamname = (string) jUser["teamname"];
email = (string) jUser["email"];
players = jUser["players"].ToArray();
}
public string name { get; set; }
public string teamname { get; set; }
public string email { get; set; }
public Array players { get; set; }
}
// Use
private void Run()
{
string json = @"{""user"":{""name"":""asdf"",""teamname"":""b"",""email"":""c"",""players"":[""1"",""2""]}}";
User user = new User(json);
Console.WriteLine("Name : " + user.name);
Console.WriteLine("Teamname : " + user.teamname);
Console.WriteLine("Email : " + user.email);
Console.WriteLine("Players:");
foreach (var player in user.players)
Console.WriteLine(player);
}
答案 1 :(得分:157)
因为我们都喜欢一个内衬代码
Newtonsoft比java脚本序列化程序更快。 ...这个依赖于Newtonsoft NuGet包,它比默认的序列化器更受欢迎。
如果我们上课,请在下面使用。
Mycustomclassname oMycustomclassname = Newtonsoft.Json.JsonConvert.DeserializeObject<Mycustomclassname>(jsonString);
没有课程然后使用动态
var oMycustomclassname = Newtonsoft.Json.JsonConvert.DeserializeObject<dynamic>(jsonString);
答案 2 :(得分:91)
要保持选项打开,如果您使用的是.NET 3.5或更高版本,这里有一个完整的示例,您可以直接使用Generics从框架中使用。正如其他人所提到的,如果它不仅仅是简单的对象,你应该真正使用JSON.net。
public static string Serialize<T>(T obj)
{
DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());
MemoryStream ms = new MemoryStream();
serializer.WriteObject(ms, obj);
string retVal = Encoding.UTF8.GetString(ms.ToArray());
return retVal;
}
public static T Deserialize<T>(string json)
{
T obj = Activator.CreateInstance<T>();
MemoryStream ms = new MemoryStream(Encoding.Unicode.GetBytes(json));
DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());
obj = (T)serializer.ReadObject(ms);
ms.Close();
return obj;
}
你需要:
using System.Runtime.Serialization;
using System.Runtime.Serialization.Json;
答案 3 :(得分:53)
鉴于您的代码示例,您不需要做任何其他事情。
如果将该JSON字符串传递给Web方法,它将自动解析JSON字符串并创建一个填充的User对象作为SaveTeam方法的参数。
一般来说,您可以使用下面的JavascriptSerializer
类,或者为了更加灵活,可以使用各种Json框架(Jayrock JSON是一个很好的框架),以便于JSON操作。
JavaScriptSerializer jss= new JavaScriptSerializer();
User user = jss.Deserialize<User>(jsonResponse);
答案 4 :(得分:37)
另一个非常简单的解决方案是使用库Newtonsoft.Json:
User user = JsonConvert.DeserializeObject<User>(jsonString);
答案 5 :(得分:30)
以下两个示例使用
示例1:使用System.Web.Script.Serialization
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System.Web.Script.Serialization;
namespace Tests
{
[TestClass]
public class JsonTests
{
[TestMethod]
public void Test()
{
var json = "{\"user\":{\"name\":\"asdf\",\"teamname\":\"b\",\"email\":\"c\",\"players\":[\"1\",\"2\"]}}";
JavaScriptSerializer serializer = new JavaScriptSerializer();
dynamic jsonObject = serializer.Deserialize<dynamic>(json);
dynamic x = jsonObject["user"]; // result is Dictionary<string,object> user with fields name, teamname, email and players with their values
x = jsonObject["user"]["name"]; // result is asdf
x = jsonObject["user"]["players"]; // result is object[] players with its values
}
}
}
用法:自定义C#对象的JSON对象
using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System.Web.Script.Serialization;
using System.Linq;
namespace Tests
{
[TestClass]
public class JsonTests
{
[TestMethod]
public void TestJavaScriptSerializer()
{
var json = "{\"user\":{\"name\":\"asdf\",\"teamname\":\"b\",\"email\":\"c\",\"players\":[\"1\",\"2\"]}}";
User user = new User(json);
Console.WriteLine("Name : " + user.name);
Console.WriteLine("Teamname : " + user.teamname);
Console.WriteLine("Email : " + user.email);
Console.WriteLine("Players:");
foreach (var player in user.players)
Console.WriteLine(player);
}
}
public class User {
public User(string json) {
JavaScriptSerializer serializer = new JavaScriptSerializer();
var jsonObject = serializer.Deserialize<dynamic>(json);
name = (string)jsonObject["user"]["name"];
teamname = (string)jsonObject["user"]["teamname"];
email = (string)jsonObject["user"]["email"];
players = jsonObject["user"]["players"];
}
public string name { get; set; }
public string teamname { get; set; }
public string email { get; set; }
public Array players { get; set; }
}
}
示例2:使用System.Web.Helpers
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System.Web.Helpers;
namespace Tests
{
[TestClass]
public class JsonTests
{
[TestMethod]
public void TestJsonDecode()
{
var json = "{\"user\":{\"name\":\"asdf\",\"teamname\":\"b\",\"email\":\"c\",\"players\":[\"1\",\"2\"]}}";
dynamic jsonObject = Json.Decode(json);
dynamic x = jsonObject.user; // result is dynamic json object user with fields name, teamname, email and players with their values
x = jsonObject.user.name; // result is asdf
x = jsonObject.user.players; // result is dynamic json array players with its values
}
}
}
用法:自定义C#对象的JSON对象
using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System.Web.Helpers;
using System.Linq;
namespace Tests
{
[TestClass]
public class JsonTests
{
[TestMethod]
public void TestJsonDecode()
{
var json = "{\"user\":{\"name\":\"asdf\",\"teamname\":\"b\",\"email\":\"c\",\"players\":[\"1\",\"2\"]}}";
User user = new User(json);
Console.WriteLine("Name : " + user.name);
Console.WriteLine("Teamname : " + user.teamname);
Console.WriteLine("Email : " + user.email);
Console.WriteLine("Players:");
foreach (var player in user.players)
Console.WriteLine(player);
}
}
public class User {
public User(string json) {
var jsonObject = Json.Decode(json);
name = (string)jsonObject.user.name;
teamname = (string)jsonObject.user.teamname;
email = (string)jsonObject.user.email;
players = (DynamicJsonArray) jsonObject.user.players;
}
public string name { get; set; }
public string teamname { get; set; }
public string email { get; set; }
public Array players { get; set; }
}
}
此代码需要添加在
中找到的System.Web.Helpers命名空间%ProgramFiles%\ Microsoft ASP.NET \ ASP.NET Web 页{VERSION} \装配\ System.Web.Helpers.dll
或者
%ProgramFiles(x86)%\ Microsoft ASP.NET \ ASP.NET Web 页{VERSION} \装配\ System.Web.Helpers.dll
希望这有帮助!
答案 6 :(得分:7)
public static class Utilities
{
public static T Deserialize<T>(string jsonString)
{
using (MemoryStream ms = new MemoryStream(Encoding.Unicode.GetBytes(jsonString)))
{
DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(T));
return (T)serializer.ReadObject(ms);
}
}
}
更多信息请访问以下链接 http://ishareidea.blogspot.in/2012/05/json-conversion.html
关于DataContractJsonSerializer Class
,您可以阅读here。
答案 7 :(得分:5)
使用JavaScriptSerializer()不如提供的通用解决方案严格:public static T Deserialize(string json)
将json传递给与您尝试转换为的Object定义不完全匹配的服务器时,这可能会派上用场。
答案 8 :(得分:2)
在性能方面,我发现ServiceStack的串行器比其他器件快一点。它是ServiceStack.Text命名空间中的JsonSerializer类。
https://github.com/ServiceStack/ServiceStack.Text
ServiceStack可通过NuGet包获得: https://www.nuget.org/packages/ServiceStack/
答案 9 :(得分:1)
JSON.Net是您最好的选择,但是,根据对象的形状以及是否存在循环依赖关系,您可以使用JavaScriptSerializer或DataContractSerializer。
答案 10 :(得分:1)
JSON C# class generator on codeplex生成的类与NewtonSoftJS一起使用。
答案 11 :(得分:1)
JavaScript序列化程序:需要using System.Web.Script.Serialization;
public class JavaScriptSerializerDeSerializer<T>
{
private readonly JavaScriptSerializer serializer;
public JavaScriptSerializerDeSerializer()
{
this.serializer = new JavaScriptSerializer();
}
public string Serialize(T t)
{
return this.serializer.Serialize(t);
}
public T Deseralize(string stringObject)
{
return this.serializer.Deserialize<T>(stringObject);
}
}
Data Contract Serializer:需要using System.Runtime.Serialization.Json;
- 泛型类型T应该是可序列化的more on Data Contract
public class JsonSerializerDeserializer<T> where T : class
{
private readonly DataContractJsonSerializer jsonSerializer;
public JsonSerializerDeserializer()
{
this.jsonSerializer = new DataContractJsonSerializer(typeof(T));
}
public string Serialize(T t)
{
using (var memoryStream = new MemoryStream())
{
this.jsonSerializer.WriteObject(memoryStream, t);
memoryStream.Position = 0;
using (var sr = new StreamReader(memoryStream))
{
return sr.ReadToEnd();
}
}
}
public T Deserialize(string objectString)
{
using (var ms = new MemoryStream(System.Text.ASCIIEncoding.ASCII.GetBytes((objectString))))
{
return (T)this.jsonSerializer.ReadObject(ms);
}
}
}
答案 12 :(得分:0)
而不是仅仅发送一个对象。
创建可访问的公共属性类,并将数据发送到Web方法。
[WebMethod]
public static void SaveTeam(useSomeClassHere user)
{
}
在ajax调用中使用相同的参数名称来发送数据。