How to call async Task using the .Net framework v3.5

Question

How to call async Task Framework 3.5 please help me. I am calling this method in my 3.5 framework project its shows an error.any alternet way post json data using Framework 3.5 Here's my code:

public async void APIPushStatusDriverPostion(string direction,string carColor,string supplier_company,string SupplierAccountId,string Karho_Ref,string booking_id,string vehicale_type, string vehicle_id, string vehicle_plate, double latitude, double longitude, string carModel, string status, string driver_id, string driver_phone, string driver_first_name, string driver_last_name)
{
    APIKarhoBookingProperties objbooking = new APIKarhoBookingProperties();
    objbooking.vehicle.vehicle_type   = vehicale_type;
    objbooking.vehicle.vehicle_id     =    vehicle_id;
    objbooking.vehicle.vehicle_plate  = vehicle_plate;
    objbooking.vehicle.latitude       =   latitude;
    objbooking.vehicle.longitude      =    longitude;
    objbooking.vehicle.eta_minutes    = "null";
    objbooking.vehicle.make           = "null";
    objbooking.vehicle.model = carModel;
    objbooking.vehicle.color = carColor;
    objbooking.vehicle.status = status;
    objbooking.vehicle.driver_id = driver_id;
    objbooking.vehicle.driver_phone = driver_phone;
    objbooking.vehicle.driver_phone = driver_first_name;
    objbooking.vehicle.driver_last_name = driver_last_name;          

    var json = JsonConvert.SerializeObject(objbooking);
    using (var response = await httpClient.PostAsync("{supplier_id}/availability?version=2", json))
    {
        string responseData = await response.Content.ReadAsStringAsync();
    }

}

.net 3.5 don't have async Task. I know if want use it. we can upgrade .net 4.5 — Linh Tuan
– Linh Tuan, Commented May 12, 2016 at 14:05
There is a Nuget package to add async to older version of .NET - see nuget.org/packages/AsyncBridge.Net35 — rbm
– rbm, Commented May 12, 2016 at 14:08

Nasreddine · Accepted Answer · 2016-05-12 14:34:02Z

2

This is not possible using the 3.5 version of the .Net framework. Your solutions are:

Not use the async/await/Task based methods or
Change the target framework to something more recent like the 4.6 version or
Use WebClient instead of the HttpClient if your use-case is simple and if it's not (ex: manipulating headers, etc) then use the HttpWebRequest object:

Here's an example using the WebClient class. It might not work correctly depending on how you're setting up your HttpClient:

using (WebClient client = new WebClient())
{
    string responseData = client.UploadString(host + "{supplier_id}/availability?version=2", json);
}

edited May 12, 2016 at 14:34

answered May 12, 2016 at 14:19

Nasreddine

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4 Comments

Nasreddine Over a year ago

It's the domain name (http://example.com) since "{supplier_id}/availability?version=2" is not a valid URL and the host was not included in your original answer. If you include the code you used to create the httpClient I might help you with that.

Zbigniew Ledwoń Over a year ago

There is no async part in this answer.

Nasreddine Over a year ago

@ZbigniewLedwoń of course not. You missed this part "This is not possible using the 3.5 version of the .Net framework"

Zbigniew Ledwoń Over a year ago

No, I did not missed it @Nasreddine. What about System.Threading in .NET Framework 3.5?

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