I have created a facebook page and a facebook application for my website and now I need to post messages onto the facebook page with help of facebook SDK .NET.
This is what I got so far :
public static bool UploadPost(string message)
{
dynamic result;
//https://developers.facebook.com/tools/explorer/
//https://developers.facebook.com/tools/access_token/
FacebookClient client = new FacebookClient("secret access token");
result = client.Get("oauth/access_token", new
{
client_id = "[Client ID number]",
client_secret = "[Client sercret",
grant_type = "client_credentials",
});
result = client.Post("[facebook app Id]/feed", new { message = "Test Message from app" });
//result.id;
result = client.Get("[facebook app Id]");
return false;
}
When running this I get : Additional information: (OAuthException - #200) (#200) The user hasn't authorized the application to perform this action on client.Post. If I remove the client.Post row every thing works good, the correct data is fetched.
I have tried follow some helps on facebook SDK .NET website but it is still not working.
The main problem now is that I get permission exception. I was hoping that my facebook app hade enouth permissions to publish post from my website to the facebook page.
Here is a step wise tutorial to register your application with facebook and get an app Id for your application.
Then for permissions ::
private const string ExtendedPermissions = "user_about_me,read_stream,publish_stream";
This is a string of permissions. Pass it on further for getting correct permissions to post messages on page. Post using your standard code for posting no FB pages.
Cheers. Hope it helps.
Are you trying to post to [facebook app id]?
I would recomend to post to "me/feed" and test if that works.
Also, to post to Facebook you have to have the publish_stream permission
private async Task Authenticate()
{
string message = String.Empty;
try
{
session = await App.FacebookSessionClient.LoginAsync("user_about_me,read_stream,publish_actions");
App.AccessToken = session.AccessToken;
App.FacebookId = session.FacebookId;
Dispatcher.BeginInvoke(() => NavigationService.Navigate(new Uri("/Pages/LandingPage.xaml", UriKind.Relative)));
}
catch (InvalidOperationException e)
{
message = "Login failed! Exception details: " + e.Message;
MessageBox.Show(message);
}
}
Should work :)
The following should work.
var fb = new FacebookClient("access_token");
fb.PostCompleted += (o, e) => {
if(e.Error == null) {
var result = (IDictionary<string, object>)e.GetResultData();
var newPostId = (string)result.id;
}
};
var parameters = new Dictionary<string, object>();
parameters["message"] = "My first wall post using Facebook SDK for .NET";
fb.PostAsync("me/feed", parameters);
This was taken directly from the documentation.
By creating a extended page token and use it to make the post everything works just fine. See this : How to get Page Access Token by code?
Im surprised that this simple task was so hard to get running and that there was vary little help to get.
Related
I am trying to post to my own status on Facebook using WinForms and the Facebook .NET SDK. I am using the code below to post an image. I get this error:
"The user hasn't authorized the application to perform this action"
I looked at similar questions but they deal with posting from a web app to other user's page which need a manual authorization on a confirmation page.
I am not finding where I grant myself this permission on Facebook. I might be missing a setting in the code too.
Any ideas?
private bool PostImage(string UserToken, string Status, string ImagePath)
{
try
{
FacebookClient fb = new FacebookClient(UserToken);
//for testing. id & name have values -----
dynamic me = fb.Get("me");
var id = me.id;
var name = me.name;
// ----------------------------------------
var imgstream = File.OpenRead(ImagePath);
dynamic response = fb.Post("/me/feed", new
{
message = Status,
file = new FacebookMediaStream
{
ContentType = "image/jpg",
FileName = Path.GetFileName(ImagePath)
}.SetValue(imgstream)
});
return true;
}
catch (Exception ex)
{
return false;
}
}
You are trying to post status on behalf of user means your application need to get permission from user using "publish_actions".
Refer : https://developers.facebook.com/docs/facebook-login/permissions/v2.5#reference-publish_actions
I'm trying to write a windows service that will post to my Facebook Page with results when it runs.
I just downloaded Facebook C# SDK v6.0.10.0 and writing the windows application in .Net 4.0
I created a facebook application account and got the AppID and Secret code needed.
The end goal would be to have this windows service post on my facebook page wall as the page and not the application user.
I keep getting an error when I go to get the accounts for my facebook application.
string strAppID = "my app api id";
string strSecret = "my app secret code";
Facebook.FacebookClient fbClient = new Facebook.FacebookClient();
fbClient.AppId = strAppID;
fbClient.AppSecret = strSecret;
dynamic ac = fbClient.Get("oauth/access_token", new
{
client_id = strAppID,
client_secret = strSecret,
grant_type = "client_credentials"
});
string strAccessToken = String.Empty;
strAccessToken = ac.access_token;
if (!String.IsNullOrEmpty(strAccessToken))
{
fbClient = new Facebook.FacebookClient(strAccessToken);
fbClient.AccessToken = strAccessToken;
fbClient.AppId = strAppID;
fbClient.AppSecret = strSecret;
//Here is where it is bombing
dynamic fbAccounts = fbClient.Get("/me/accounts");
fbClient = new Facebook.FacebookClient(strAccessToken);
fbClient.AccessToken = strAccessToken;
fbClient.AppId = strAppID;
fbClient.AppSecret = strSecret;
dynamic me = fbClient.Get("**Name of the facebook page I am trying to post to**");
string strPageID = String.Empty;
strPageID = me.id;
string strPageAccessToken = String.Empty;
//Loop over the accounts looking for the ID that matches your destination ID (Fan Page ID)
foreach (dynamic account in fbAccounts.data)
{
if (account.id == strPageID)
{
//When you find it, grab the associated access token and put it in the Dictionary to pass in the FB Post, then break out.
strPageAccessToken = account.access_token;
break;
}
}
try
{
fbClient.AccessToken = strPageAccessToken;
var args = new Dictionary<string, object>();
args["message"] = "Testing 123";
fbClient.Post("/" + strPageID + "/feed", args);
}
catch (Facebook.FacebookOAuthException ex)
{
// oauth exception occurred
}
catch (Facebook.FacebookApiLimitException ex)
{
// api limit exception occurred.
}
catch (Facebook.FacebookApiException ex)
{
// other general facebook api exception
}
catch (Exception ex)
{
// non-facebook exception such as no internet connection.
}
}
The error I am getting is on the line:
dynamic fbAccounts = fbClient.Get("/me/accounts");
(OAuthException - #2500) An active access token must be used to query information about the current user.
see here: (OAuthException - #2500) An active access token must be used to query information about the current user
you are getting access token for the APPLICATION, not for a user.
Therefore, "me" does not make sense. You should supply ID there -
either your user ID, or your app ID, or any other ID your app has
permissions for.
dynamic ac = fbClient.Get("oauth/access_token", new
{
client_id = strAppID,
client_secret = strSecret,
grant_type = "client_credentials"
});
The above code may not work for version 6.0.
OAuth 2.0 - exchange code for access token
FacebookClient supports parsing only json responses. Due to this
reason “oauth/access_token” token will not work when using
FacebookClient.Get(“oauth/access_token”). Instead you will need to use
a method in FacebookOAuthClient.
You can find more details here: http://blog.prabir.me/post/Facebook-CSharp-SDK-Making-Requests.aspx
Hope this helps.
I'm using Facebook C# sdk with the code,
i'm trying to create a new score for a user
but i get this error:
(OAuthException) An active access token must be used to query information about the current user.
what am i missing?
protected void btnAddScore_Click(object sender, EventArgs e)
{
if (CanvasAuthorizer.Authorize())
{
var fb = new FacebookWebClient();
dynamic parameters = new ExpandoObject();
parameters.score = 77;
parameters.access_token = GetAppAccessToken();
try
{
dynamic id = fb.Post("me/scores", parameters);
lblPostMessageResult.Text = "Message posted successfully";
txtMessage.Text = string.Empty;
}
catch (FacebookApiException ex)
{
lblPostMessageResult.Text = ex.Message;
}
}
}
private string GetAppAccessToken()
{
var oauthClient = new FacebookOAuthClient
{
AppId = FacebookWebContext.Current.Settings.AppId,
AppSecret = FacebookWebContext.Current.Settings.AppSecret
};
dynamic result = oauthClient.GetApplicationAccessToken();
string appAccessToken = result.access_token;
return appAccessToken;
}
edit:
I got the answer form here:
http://facebooksdk.codeplex.com/discussions/279307
the new right code is:
if (CanvasAuthorizer.Authorize())
{
var fb = new FacebookClient(CanvasAuthorizer.FacebookWebRequest.AccessToken);
var oauthClient = new FacebookOAuthClient(FacebookApplication.Current);
dynamic parameters = new ExpandoObject();
parameters.score = 100;
dynamic ac = oauthClient.GetApplicationAccessToken();
parameters.access_token = ac.access_token;
dynamic result = fb.Post(CanvasAuthorizer.FacebookWebRequest.UserId + "/scores", parameters);
}
Answer:-
Actually for using SCORE Graph API you need the "Application access token" which is different than a normal access token
So if you want your task to be done GET an Application access token by using the following script.......
And then replace the generated application_access_token with old access_token, that's it
The below code is written in php try convert it in c# and then apply it
$APPLICATION_ID = "APP_ID";
$APPLICATION_SECRET = "APP_SECRET";
$token_url = "https://graph.facebook.com/oauth/access_token?" .
"client_id=" . $APPLICATION_ID .
"&client_secret=" . $APPLICATION_SECRET .
"&grant_type=client_credentials";
$app_token = file_get_contents($token_url);
After getting this application access token you can easily do this task.
When You Need An Application Access Token
You need to use a Facebook application access token when you have a process that acts on behalf of the application, rather than on behalf of a particular user. This happens when you access your Facebook Insights data for your app via the graph, and also when you want to create test Facebook users for your app.
Sadly, the documentation for this is buried in the authentication guide for the Facebook graph API.
Your application need to take "publish_actions" permission from user to update the score.
Refer to Create or update a score for a user section of the below documentation.
https://developers.facebook.com/docs/score/
I am currently working on a mobile web page in asp.Net MVC2 that allows users to post to their walls. I have the following code that posts to the user's wall, but would like to instead have a redirect to Facebook's mobile "Post To my Wall" view to allow the user to add to the posted message and submit with a "Post" button or "Cancel". Do I have to recreate this view myself? It seems like something that a lot of sites would use.
public string PostToWall(string code)
{
string authToken = string.Empty;
try
{
authToken = GetAuthToken(code);
FacebookClient app = new FacebookClient(authToken);
dynamic user = app.Get("me");
var id = user.id;
var args = new Dictionary<string, object>();
args["message"] = "Test Wall Post";
args["caption"] = "Test Caption";
args["description"] = "Test Description";
args["name"] = "Test Name";
//args["picture"] = "[your image URL]";
//args["link"] = "[your link URL]";
app.Post("/me/feed", args);
return string.Empty;
}
catch (Exception ex)
{
_log.ErrorFormat("Error getting the Facebook authentication token. {0}", ex);
return string.Empty;
}
}
Thanks!
[Edit] #OffBySome I set up a rough test using the facebook Javascript SDK and I set it to display: 'touch' but it still pops up in my safari iphone user agent. I used this
attachment: {
title: '<my title>',
caption: '<my caption>',
description: (
<my description>
),
name: '<name>',
link: '<link>',
display: 'touch', },
But none of these attachments get added to my wall posts. Am I doing it wrong? Dialogs: Fb.Ui http://developers.facebook.com/docs/reference/javascript/#xfbml
Easiest for this would be to use the Facebook javascript sdk and use the FB.ui dialog to allow the user to share. You can set display=touch or display=wap for a mobile optimized dialog.
I'm building a simple app too that needs to access a calendar that's in my Google Apps account. But I'm having problems with authentication. I've tried the following code but it doesn't work:
Service service = new Service("<appname>");
service.setUserCredentials("<email>", "<password>");
CalendarEntry entry = (CalendarEntry)service.Get("<eventUrl>");
How do you get this to work with Google Apps? Is there any other type of authentication that I have to use for Google apps?
Update:
Unlocking the captcha solved my problem with getting the feed. Now I've hit the next wall: updating an event.
entry.Title.Text = "Foo";
entry.Update();
Gives me the GDataRequestException exception: "Can not update a read-only entry".
Im using the private calendar xml address that I got under kalendarsettings:
https://www.google.com/calendar/feeds/_%40group.calendar.google.com/private-/basic
I would recommend using Fiddler to see what http response you are getting back from Google. When I ran your code against my google apps account, I was getting back an "Error=CaptchaRequired" response. This required that I go to https://www.google.com/a/yourgoogleappdomain.com/UnlockCaptcha (replacing with your domain obviously). After I did that I was able to properly connect. You may be getting a different error code too so check for that and post it here. You could have an invalid password or invalid url or this functionality is disabled by your google apps administrator. Here is my sample code:
var calendarService = new CalendarService("company-app-version");
calendarService.setUserCredentials("<email>", "<password>");
var eventQuery = new EventQuery("http://www.google.com/calendar/feeds/user%40domain.com/private/full");
var eventFeed = calendarService.Query(eventQuery);
foreach (var atomEntry in eventFeed.Entries)
{
Console.WriteLine(atomEntry.Title.Text);
}
Make sure to replace the email, password, and email inside of the URL (url encode the # sign too).
using Google.GData.Client;
public bool ValidateGoogleAccount(string login, string password)
{
try
{
Service bloggerService = new Service("blogger", "App-Name");
bloggerService.Credentials = new GDataCredentials(login, password);
string token = bloggerService.QueryAuthenticationToken();
if (token != null)
return true;
else
return false;
}
catch (Google.GData.Client.InvalidCredentialsException)
{
return false;
}
}
Yet another solution Austin from google provides (it worked for me):
http://groups.google.com/group/google-calendar-help-dataapi/browse_thread/thread/400104713435a4b4?pli=1