如何获取JSON字符串值？

Question

var responseFromServer = 
    // lines split for readability 
    "{\"flag\":true,\"message\":\"\",\"result\":{\"ServicePermission\":true," 
    + "\"UserGroupPermission\":true}}"; 
var serializer = new System.Web.Script.Serialization.JavaScriptSerializer(); 
var responseValue = serializer.DeserializeObject(responseFromServer); 

responseFromServer值是获得一个Web服务，然后如何获得JSON字符串值，如“旗帜”，“ServicePermission权限” ??

词缀：对不起，使用C＃来做到这一点。

Answer 1

注：JavaScriptSerializer实际上是最慢的JSON序列我曾经为基准。所以我必须将它从my benchmarks中删除，因为它耗时太长（> 100倍慢）。

反正这很容易使用ServiceStack.Text's JSON Serializer解决：

var response = JsonSerializer.DeserializeFromString<Dictionary<string,string>>(responseFromServer); 
var permissions = JsonSerializer.DeserializeFromString<Dictionary<string,string>>(response["result"]); 
Console.WriteLine(response["flag"] + ":" + permissions["ServicePermission"]); 

为了完整，这也将有ServiceStack.Text.JsonSerializer工作：

public class Response 
{ 
    public bool flag { get; set; } 
    public string message { get; set; } 
    public Permisions result { get; set; } 
} 
public class Permisions 
{ 
    public bool ServicePermission { get; set; } 
    public bool UserGroupPermission { get; set; } 
} 

var response = JsonSerializer.DeserializeFromString<Response>(responseFromServer); 
Console.WriteLine(response.flag + ":" + response.result.ServicePermission); 

Answer 2

if u are using jQuery u can do this 

    var json=jQuery.parseJSON(responseFromServer); 

    //acess 
    alert(json.ServicePermission); 

if you are asing microsoft ajax do this 

var json=Sys.Serialization.JavaScriptSerializer.deserialize(responseFromServer,true); 

    //acess 
    alert(json.ServicePermission); 

c＃like php我还没有看到任何方法可以将json转换为对象。要在C＃中进行转换，您必须先为此创建一个类。

对于你的情况，你可以做这样的

//定义类

public class Response 
{ 
    public bool flag { get; set; } 
    public string message { get; set; } 
    public Permisions result { get; set; } 
} 
public class Permisions 
{ 
    public bool ServicePermission { get; set; } 
    public bool UserGroupPermission { get; set; } 
} 


     var responseFromServer = 
      // lines split for readability 
    "{\"flag\":true,\"message\":\"\",\"result\":{\"ServicePermission\":true," 
    + "\"UserGroupPermission\":true}}"; 
     var serializer = new System.Web.Script.Serialization.JavaScriptSerializer(); 
     var responseValue = serializer.Deserialize<Response>(responseFromServer); 

    //access  
    responseValue.result.ServicePermission