C# Accessing JSON Stream Get.response Data in Asp.net

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 e.g. "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:

Saurin Vala · Accepted Answer · 2018-02-06T09:21:01.083

2

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 !

edited Feb 06 '18 at 09:21

answered Feb 06 '18 at 08:17

Saurin Vala

1,898
1
17
23

Could you explain your answer a bit more please. I am very new to this. How would I now do "Label1.text = oRootObject.SessionID" or something like that. How do I now display the SessionID? – Frank Feb 06 '18 at 08:46
@Frank, I am not good with explanation, but I tried, review it, you may understand now. – Saurin Vala Feb 06 '18 at 08:59
I tried exactly your code but it seems to give problems. Here is a screenshot of what I have https://imgur.com/NDWzzdu – Frank Feb 06 '18 at 09:15
Perfect! Thank you! Maybe just replace your "TheText" with "responseFromServer" just for it to align with my question code – Frank Feb 06 '18 at 09:45

score 2 · Answer 2 · answered Feb 06 '18 at 08:17

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

answered Feb 06 '18 at 08:17

Jayakrishnan

4,232
2
23
35

1

Even though your answer might be the best one, the lack of explanation caused me to rather focus on the other answer to find my solution :) – Frank Feb 06 '18 at 09:55

score 0 · Answer 3 · answered Feb 06 '18 at 08:16

0

Did you try to create an utLogon_response with string SessionId Property and to do : var text = Jsonconvert.DeserializeObject(responseFromServer)

answered Feb 06 '18 at 08:16

MrLoyal

1
2

Even though your answer might be the best one, the lack of explanation caused me to rather focus on the other answer to find my solution :) – Frank Feb 06 '18 at 09:55
No problem :) When i published my response, the example of my code got truncated.. don't know why! – MrLoyal Feb 06 '18 at 13:24

C# Accessing JSON Stream Get.response Data in Asp.net

3 Answers3