How to serialize Json object into System.Net.WebClient (.NET 3.5)

Question

How can you serialize a json object and pass it on to an api call, like the one in the example posted as an answer here Call web APIs in C# using .NET framework 3.5

System.Net.WebClient client = new System.Net.WebClient();
 client.Headers.Add("content-type", "application/json");//set your header here, you can add multiple headers
 string s = Encoding.ASCII.GetString(client.UploadData("http://localhost:1111/Service.svc/SignIn", "POST", Encoding.Default.GetBytes("{\"EmailId\": \"[email protected]\",\"Password\": \"pass#123\"}")));

In Postman I would just do this

 var client = new RestClient("");
 var request = new RestRequest(Method.POST);
 request.JsonSerializer = new RestSharpJsonNetSerializer();
 request.AddJsonBody(JsonObject);

However, as Postman is not supported in .net framework 3.5, I have to use System.Net.WebClient.

Why do you want to deserialize it? You need it in a serialized form to send it. — ProgrammingLlama
– ProgrammingLlama, Commented Nov 16, 2017 at 8:12
In that case, look at Newtonsoft's JSON.Net - it's pretty much the de facto JSON serializer for .NET (to the point that even Microsoft use it). — ProgrammingLlama
– ProgrammingLlama, Commented Nov 16, 2017 at 8:15
You can use string s = client.UploadString("..","POST", JsonConvert.SerializeObject(yourObject)); — Evk
– Evk, Commented Nov 16, 2017 at 8:22
Really that simple.. Huh, I thought of that, but thought there perhaps was a better approach. Add your comment as an answer :) — miniHessel
– miniHessel, Commented Nov 16, 2017 at 8:25

Evk · Accepted Answer · 2017-11-16 08:34:57Z

1

You can do what you want with WebClient (and Json.NET package) like this:

var yourObject = new YourObject {
    Email = "email",
    Password = "password"
};
string s = client.UploadString("http://localhost:1111/Service.svc/SignIn","POST", JsonConvert.SerializeObject(yourObject));

edited Nov 16, 2017 at 8:34

answered Nov 16, 2017 at 8:28

Evk

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3 Comments

Evk Over a year ago

@miniHessel ah sorry I missed about .NET 3.5. Maybe there are indeed not much options there, not sure.

miniHessel Over a year ago

I think there isn't. Do you know how to check for status code like this IRestResponse response = client.Execute(request); if (response.StatusCode == System.Net.HttpStatusCode.OK) return true; with WebClient?

Evk Over a year ago

Seems there is no direct way, but you can check this: stackoverflow.com/q/3574659/5311735. Though if response code is not successful (not in 2xx range) - it should throw an exception.

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