C＃在Asp.net中访问JSON Stream Get.response数据

Question

I am very new to C#and I am trying to contact a server and received data from the server. I can successfully receive the data, but I don't know how to access the object's properties. What I want is to display only the SessionID eg "biRvqpChQZf7Cujy5CuW0PjU1R7gIp"

    WebRequest LoginRequest = WebRequest.Create("xxx");
    LoginRequest.Method = "GET";
    WebResponse LoginResponse = LoginRequest.GetResponse();

    Stream LoginResponseStream = LoginResponse.GetResponseStream();
    StreamReader reader = new StreamReader(LoginResponseStream);
    string responseFromServer = reader.ReadToEnd();

    string TheText = new JavaScriptSerializer().Serialize(responseFromServer);
    Label1.Text = TheText;

As is the outcome of TheText now is:

"{\\"utLogon_response\\":{\\"SessionID\\":\\"rP99mnHAFwI840xVJMDOJpcgmE2l6z\\"}}"

Here is the object "manually" from HTML:

Answer 1

You need to deserialize

In this example RootObject should be your class :

*if you dont have a class with get;set; property, you can create it from this website : http://json2csharp.com/

Just paste your json string in that website (json2csharp), and you will get all your property.

JavaScriptSerializer oJS = new JavaScriptSerializer();
RootObject oRootObject = new RootObject();
oRootObject = oJS.Deserialize<RootObject>(Your JSon String);

---

step by step

Suppose your json is :

string TheText =  "{\"utLogon_response\":{\"SessionID\":\"rP99mnHAFwI840xVJMDOJpcgmE2l6z\"}}";

And these are your class based on your json :

public class UtLogonResponse
{
    public string SessionID { get; set; }
}

public class RootObject
{
    public UtLogonResponse utLogon_response { get; set; }
}

then use this code :

   JavaScriptSerializer oJS = new JavaScriptSerializer();
   RootObject oRootObject = new RootObject();
   oRootObject = oJS.Deserialize<RootObject>(TheText);

   var yourSessionId = oRootObject.utLogon_response.SessionID; //Done !

Answer 2

You need to create an object and then deserialize instead of serializing it. You can use JSON.net to deserialize them.

class Test
{
   public string SessionID { get; set; }
}

//after getting response from server
Test tmp = JsonConvert.DeserializeObject<Test>(responseFromServer);
Label1.Text = tmp.SessionID; 

Below links might help you a lot:

https://www.newtonsoft.com/json/help/html/SerializingJSON.htm

Newtonsoft JSON Deserialize

Answer 3

您是否尝试使用字符串SessionId属性创建utLogon_response并执行以下操作：var text = Jsonconvert.DeserializeObject（responseFromServer）