Send a JSON request to another web site from C# code behind in an ASP.NET MVC project-CodePudding

The

CodePudding user response：

This is how I would post a JSON object to somewhere using Newtonsoft.Json package, HttpClient and StringContent classes:

using Newtonsoft.Json; var object = new Model { //your properties } var jsonObject = JsonConvert.SerializeObject(object); var url = "http://yoururl.com/endpoint"; //<- your url here try { using HttpClient client = new(); var content = new StringContent(jsonObject , Encoding.UTF8, "application/json"); var res = await client.PostAsync(url, content); }

CodePudding user response：

It looks like you might not be correctly handling an asynchronous task — the WaitingForActivation message you’re seeing, rather than being a response from our API, is in fact the status of your task. The task is waiting to be activated and scheduled internally by the .NET Framework infrastructure.
It seems you might need to await⁽²⁾ the task to ensure it completes or access the response with await client.PostAsync(url, content);. for adding await you need to add async to controller⁽¹⁾ action.

public async Task<ActionResult> Index(int idInsc) //Change here [1] { INSC_Inscription insc = GetMainModelInfos(idinsc); JsonModel jm = new JsonModel(); jm.store_id = "store2"; jm.api_token = "yesguy"; jm.checkout_id = "uniqueId"; jm.txn_total = "123.00"; jm.environment = "qa"; jm.action = "preload"; var jsonObject = JsonConvert.SerializeObject(jm); var url = "https://gatewayt.whatever.com/chkt/request/request.php"; HttpClient client = new HttpClient(); var content = new StringContent(jsonObject, System.Text.Encoding.UTF8, "application/json"); System.Threading.Tasks.Task<HttpResponseMessage> res = await client.PostAsync(url, content); //Change here [2] insc.response = res.Result; // This cause an exeption return View(insc); }