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C# How to post data with multiple POST requests through Facebook API

I've been trying to post a message along with a link, I can send one POST request, but I am not sure how would one send two.
Here's my code:
private void Button2_Click(object sender, EventArgs e)
{
using (var client = new HttpClient())
{
client.BaseAddress = new Uri("https://graph.facebook.com");
string message = "hello";
string link = "www.facebook.com"
var payload = GetPayload(new {message});
HttpResponseMessage response2 = client.PostAsync($"me/feed?access_token={TextBox1.Text}", payload).Result;
}
}
private static StringContent GetPayload(object data)
{
var json = JsonConvert.SerializeObject(data);
return new StringContent(json, Encoding.UTF8, "application/json");
}
I am not sure how can I include the link too along with the message.

Al-right it turns out that the variable link should be passed as such:
var data = {message, link}
Thanks to chetan.

HttpClient.PostAsync causes infinite Loop when calling at Page_Load

I have this Web Api call in my code behind. This is for my Single-Sign-On using Windows credential from our AD. What it did is just call the Web Api and check if the User is Authenticated and have access to the App.
I successfully call my Web Api using HttpClient.PostAsync but I'm wondering why it called several times in my Page_Load?
Please see below my Page_Load how I call the Web Api:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
var languages = Language.Enabled().OrderByDescending(x => x.IsDefault);
var selected = languages.Where(x => x.Code == HSESA.Library.Helpers.Context.PublicLanguage().Code).Select(x => x.Code).FirstOrDefault();
Test();
}
}
And here is the Test() method and how I initialized HttpClient:
private static HttpClient client = new HttpClient();
protected void Test()
{
string user = System.Security.Principal.WindowsIdentity.GetCurrent().Name;
string FromUrl = HttpContext.Current.Request.Url.AbsoluteUri;
#region Old Code
var postData = new List<KeyValuePair<string, string>>();
postData.Add(new KeyValuePair<string, string>("Login", user));
postData.Add(new KeyValuePair<string, string>("FromUrl", FromUrl));
System.Net.Http.HttpContent content = new System.Net.Http.FormUrlEncodedContent(postData);
string url = "http://localhost:1899";
client.BaseAddress = new Uri(url);
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));
var response = client.PostAsync("/api/login/checkLogin", content).Result;
if (response.IsSuccessStatusCode)
{
LoginItemViewModel data = null;
string responseString = response.Content.ReadAsStringAsync().Result;
Newtonsoft.Json.Linq.JObject json = Newtonsoft.Json.Linq.JObject.Parse(responseString);
data = Newtonsoft.Json.JsonConvert.DeserializeObject<LoginItemViewModel>(responseString);
}
#endregion
}
Thanks in advance to someone that can help me with my problem.

Xamarin Forms Post Request Http Issue

I'm working on making a POST request using my Xamarin form to send data to an Action in my controller in my WebAPI project. The code with breakpoints doesn't go beyond
client.BaseAddress = new Uri("192.168.79.119:10000");
I have namespace System.Net.Http and using System mentioned in the code.
private void BtnSubmitClicked(object sender, EventArgs eventArgs)
{
System.Threading.Tasks.Task<HttpResponseMessage> statCode = ResetPassword();
App.Log(string.Format("Status Code", statCode));
}
public async Task<HttpResponseMessage> ResetPassword()
{
ForgotPassword model = new ForgotPassword();
model.Email = Email.Text;
var client = new HttpClient();
client.BaseAddress = new Uri("192.168.79.119:10000");
var content = new StringContent(
JsonConvert.SerializeObject(new { Email = Email.Text }));
HttpResponseMessage response = await client.PostAsync("/api/api/Account/PasswordReset", content); //the Address is correct
return response;
}
Need a way to make a Post request to that Action and sending that String or the Model.Email as a parameter.

You need to use a proper Uri and also await the Task being returned from the called method.
private async void BtnSubmitClicked(object sender, EventArgs eventArgs) {
HttpResponseMessage response = await ResetPasswordAsync();
App.Log(string.Format("Status Code: {0}", response.StatusCode));
}
public Task<HttpResponseMessage> ResetPasswordAsync() {
var model = new ForgotPassword() {
Email = Email.Text
};
var client = new HttpClient();
client.BaseAddress = new Uri("http://192.168.79.119:10000");
var json = JsonConvert.SerializeObject(model);
var content = new StringContent(json, System.Text.Encoding.UTF8, "application/json");
var path = "api/api/Account/PasswordReset";
return client.PostAsync(path, content); //the Address is correct
}

Retrieving data from secure website on Windows Phone 8

I am trying to retrieve data from an authorization-restricted database which only contains text to my Windows Phone 8 app. My code looks like this:
private void Button_Click_1(object sender, RoutedEventArgs e)
{
WebClient wc = new WebClient();
wc.DownloadStringCompleted += new DownloadStringCompletedEventHandler(wc_DownloadStringCompleted);
wc.Credentials = new NetworkCredential("username", "password");
wc.DownloadStringAsync(new Uri(#"http://www.siteaddress.com"));
}
void wc_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
string text = e.Result;
}
Unfortunately I'm getting the following message. Am I doing anything wrong? Thanks in advance.
http://s30.postimg.org/yuc0mcb5t/pic.png

If you are trying to send data to the server to receive response from the server, then you mean POST data to server .
void GetPosts(string UserID)
{
WebClient webclient = new WebClient();
Uri uristring = new Uri("somelink.com");
webclient.Headers["Content-Type"] = "application/x-www-form-urlencoded";
string postJsonData = string.Empty;
postJsonData += "userId=" + UserID;//parameters you want to POST
webclient.UploadStringAsync(uristring, "POST", postJsonData);
webclient.UploadStringCompleted += webclient_UploadStringCompleted;
}
void webclient_UploadStringCompleted(object sender, UploadStringCompletedEventArgs e)
{
.... // any code
}

get json from webservices with webclient without manipulate data in other method

I'm developping on Windows phone 8 and I would like to know if it's possible to manipulate data in the same method when we call DownloadStringCompleted of WebClient?
private void DownloadDataFromWebService(String uri)
{
WebClient wc = new WebClient();
wc.DownloadStringAsync(new Uri(uri));
wc.DownloadStringCompleted += new DownloadStringCompletedEventHandler(wc_DownloadStringCompleted);
}
private void wc_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
RootObject r = JsonConvert.DeserializeObject<RootObject>(e.Result);
List<Category> listeCategories = r.Result;
}
Thus, I would like to manage all code in only one method because I would like to return an object
For example,
private List<Category> GetCategories(String uri)
{
WebClient wc = new WebClient();
wc.DownloadStringAsync(new Uri(uri));
.....
.....
RootObject r = JsonConvert.DeserializeObject<RootObject>(e.Result);
return (List<Category>) r.Result;
}

Yes, that is possible, due to magic TaskCompletionSource class, http://msdn.microsoft.com/en-us/library/dd449174(v=vs.95).aspx . To download:
async Task<List<object>> getCategories(String uri)
{
var taskCompletionObj = new TaskCompletionSource<string>();
var wc= new webClient();
wc.DownloadStringAsync(new URI(uri, Urikind.Absolute)) += (o, e) =>
{
taskCompletionObj.TrySetResult(e.Result);
};
string rawString = await taskCompletionObj.Task;
RootObject r = JsonConvert.DeserializeObject<RootObject>(rawString);
return (List<Category>)r.Result;
}
To use: var x = await getCategories(myURI);