如何獲取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值是獲得一個Web服務，然後如何獲得JSON字符串值，如「旗幟」，「ServicePermission權限」 ??

詞綴：對不起，使用C＃來做到這一點。

Answer 1

注：JavaScriptSerializer實際上是最慢的JSON序列我曾經爲基準。所以我必須將它從my benchmarks中刪除，因爲它耗時太長（> 100倍慢）。

反正這很容易使用ServiceStack.Text's JSON Serializer解決：

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

爲了完整，這也將有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我還沒有看到任何方法可以將json轉換爲對象。要在C＃中進行轉換，您必須先爲此創建一個類。

對於你的情況，你可以做這樣的

//定義類

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