I am using visual studio 2013 .NET 4.5 and C# with a windows forms client application, I am trying to post a message to my own Facebook managed page. I have created a new Facebook application, but not yet published it, I am unsure of the settings, but I have the app_id, app_secret and from debugging I have the access_token.
I used a piece of code to open a browser window to login with permissions and this was successful/
I am getting the following error:
OAuthException - #200) (#200) The user hasn't authorized the application to perform this action
The code I am using is below:
var fb = new FacebookClient("AUTH_CODE")
dynamic parameters = new ExpandoObject();
parameters.message = "hello tweet tweet";
dynamic result = fb.Post("SITE_ID/feed", parameters);
var id = result.id;
for logging in I am using:
var client = new FacebookClient();
client.AppSecret = app_secret;
client.AppId = app_id;
client.AccessToken = "AUTH_CODE";
var fbLoginUri = client.GetLoginUrl(new
{
client_id = app_id,
redirect_uri =
"https://www.facebook.com/connect/login_success.html",
response_type = "code",
scope = "manage_pages,offline_access,publish_stream,publish_actions"
});
System.Diagnostics.Process.Start(url);
I am already logged in and the message on the browser shows SUCCESS...
The DLL that I have referenced is the latest v6.0 Facebook C# SDK
Do I need to setup the Facebook app so that it has permissions to post onto my managed wall and if so how do I do it.
I hope someone out there can help, I have been looking at this for days and I need a little help.
PS:
I have also tried the following code:
var fb = new FacebookClient();
dynamic result = fb.Get("oauth/access_token", new
{
client_id = app_id,
client_secret = app_secret,
grant_type = "client_credentials",
scope = "manage_pages,offline_access,publish_stream"
});
var app_token = result.access_token;
var client = new FacebookClient(app_token);
dynamic parameters = new ExpandoObject();
parameters.message = "Check out this funny article";
parameters.link = "http://www.natiska.com/article.html";
parameters.picture = "http://www.natiska.com/dav.png";
parameters.name = "Article Title";
parameters.caption = "Caption for the link";
//446533181408238 is my fan page
client.Post("/446533181408238/feed", parameters);
Paul.
It seems that the request code from your access token request is missing which probably causes this error, see this question for more details on this.
Related
Attempting this on .NET Core 3.1
After several hours of trying to publish a photo to my public facebook page (as in business page) of which I am the admin and have a long-term token for...
I keep getting the following response to my request using the official Facebook SDK for .NET. However, the image itself is never loaded.
{{"id":"786692942226147","post_id":"113260773923227_786692942226147"}}
The request looks like
var imageMedia = new FacebookMediaObject { FileName = file.FileName, ContentType = file.ContentType };
var stream = file.OpenReadStream();
var bytes = await stream.ReadAsByteArrayAsync();
imageMedia.SetValue(bytes);
var fbClient = new FacebookClient(credential.Token)
{
AppId = _config.GetValue<string>("FacebookClientId"),
AppSecret = _config.GetValue<string>("FacebookSecret")
};
dynamic parameters = new ExpandoObject();
parameters.message = request.Message;
parameters.file = imageMedia;
var result = await fbClient.PostTaskAsync($"{credential.PageId}/photos", parameters, token);
I'm sure it has something to do with the parameters I'm passing in, like parameters.file... but the docs for this thing are VERY unclear... as in "literally does not exist"
Anyone with experience getting this working, please point me in the right direction?
The solution is to change parameters.file to parameters.image...
I'm using the Facebook C# SDK to authorize my app login and post on the user's timeline. So far the login feature works and permissions are authorized, but when my code gets to the PostTaskAsync method, my app crashes with an error stating:
The program '[1020] LC Points.WindowsPhone.exe' has exited with code 0 (0x0).
I've been following this example on SO but their is no Api method available in the SDK I'm using.
Does anyone know how to debug or resolve this posting issue?
I've submitted the publish_actions for review on the Facebook developer console, but don't think that's the reason the app is crashing.
This is the ShareApp Task I'm using to call the login and posting code:
private async Task ShareApp()
{
//Facebook app id
var clientId = "573586446116744";
//Facebook permissions
var scope = "public_profile, email, publish_actions";
var redirectUri = WebAuthenticationBroker.GetCurrentApplicationCallbackUri().ToString();
var fb = new FacebookClient();
var app = new FacebookClient(fb.AccessToken);
var loginUrl = fb.GetLoginUrl(new
{
client_id = clientId,
redirect_uri = redirectUri,
response_type = "token",
scope = scope
});
Uri startUri = loginUrl;
Uri endUri = new Uri(redirectUri, UriKind.Absolute);
WebAuthenticationBroker.AuthenticateAndContinue(startUri, endUri, null, WebAuthenticationOptions.None);
//Code to post app on the user's timeline after button click..crashes when program execution comes to this code:
var postArgs = new Dictionary<string, object>();
postArgs["link"] = "http://allaboutwindowsphone.com/software/developer/Brian-Varley.php";
postArgs["name"] = "More from BV Apps..";
postArgs["message"] = "I'm using LC Points to calculate my Leaving Cert Points!";
await app.PostTaskAsync("/me/feed", postArgs);
//app.Api("/me/feed", postArgs, HttpMethod.Post); //no Api method available which is why I've used PostTaskAsync instead.
}
This is the link to the repo on my GitHub for reference
I have a website made with ASP.NET webform .NET 4.5 C#. This site contains a forum(homemade by me), parts of this forum needs to be posted to the specific facebook wall(made for this webpage). What I need :
Post just created thread(message) from specific part of the forum to the corsponding facebook wall.
Optional : Sync the forum thread on webpage with message/comments on the specific facebook page
I have looked at these guides :
http://www.codeproject.com/Articles/569920/Publish-a-post-on-Facebook-wall-using-Graph-API
http://www.c-sharpcorner.com/UploadFile/raj1979/post-on-facebook-users-wall-using-Asp-Net-C-Sharp/
But im not sure that this is really the solution for me? I have tried to follow the guide but it does not look the same.
Edit :
dynamic result;
//https://developers.facebook.com/tools/explorer/
//https://developers.facebook.com/tools/access_token/
FacebookClient client = new FacebookClient(ConfigurationManager.AppSettings["FacebookAppToken"]);
//result = client.Get("debug_token", new
//{
// input_token = ConfigurationManager.AppSettings["FacebookAppToken"],
// access_token = ConfigurationManager.AppSettings["FacebookAppToken"]
//});
//result = client.Get("oauth/access_token", new
// {
// client_id = ConfigurationManager.AppSettings["FacebookAppId"],
// client_secret = ConfigurationManager.AppSettings["FacebookAppSecret"],
// grant_type = "client_credentials",
// //redirect_uri = "http://www.MyDomain.net/",
// //code = ""
// });
result = client.Get("oauth/access_token", new
{
client_id = ConfigurationManager.AppSettings["FacebookAppId"],
client_secret = ConfigurationManager.AppSettings["FacebookAppSecret"],
grant_type = "client_credentials"
});
client.AccessToken = result.access_token;
result = client.Post("[IdOfFacebookPage]/feed", new { message = "Test Message from app" });
//result.id;
result = client.Get("[IdOfFacebookPage]");
return false;
Approach to post to a facebook wall:
You need to register in facebook developer tools.
Create a app (fill a form).
Download FGT 5.0.480 (Facebook graph toolkit)
Reference FGT dlls in your web application.
FGT has methods to post to facebook wall but needs appId.
Use the app id of your app created in step 2.
To post to an user's wall through facebook, it is only possible through an app.
Try this asp .net app, which will allow you to post in your wall:
https://apps.facebook.com/aspdotnetsample/?fb_source=search&ref=br_tf
This will allow you to envision what you need.
Your app gets an appId with which you need to generate auth token.
Limitation: The user's wall where you want to post should have added the app created at step 2, this is compulsory and there is no work around.
When the user accesses the app for the first time, it automatically asks for permission to post to wall--> the user needs to accept it.
Hope this gives you an idea on how to go about doing this.
You can then post into the user's wall.
For Banshee's below request using Facebook SDK for .NET:
userId - facebook user id, wall to post the message
This user should have added the app created by you in step 1 else it will say unauthorized access.
dynamic messagePost = new ExpandoObject();
messagePost.picture = "http://www.stackoverflow.com/test.png";
messagePost.link = "http://www.stackoverflow.com";
messagePost.name = "This is a test name";
messagePost.caption = "CAPTION 1";
messagePost.description = "Test desc";
messagePost.message = "message"
var fb = new FacebookClient();
dynamic result = fb.Get("oauth/access_token", new {
client_id = "app_id",
client_secret = "app_secret",
grant_type = "client_credentials"
});
fb.AccessToken = result.access_token;
try
{
var postId = fb.Post(userId + "/feed", messagePost);
}
catch (FacebookOAuthException ex)
{
//handle oauth exception
}
catch (FacebookApiException ex)
{
//handle facebook exception
}
You will need an extended token to publish to a wall.. Steps to get extended token is explained well by Banshee..
Edit: How to get extended token by Banshee:
Please follow this post
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.
I have been struggling with something and I seem to be missing something. I want to post events to Facebook using my Facebook appid / appsecret. The events should be owned by the application and not by any user. I try to do this as follows :
var fc = new FacebookClient();
fc.AppId = "myappid";
fc.AppSecret = "myappsecret";
//get a token
dynamic result = fc.Get("oauth/access_token", new
{
client_id = fc.AppId,
client_secret = fc.AppSecret,
grant_type = "client_credentials"
});
//use the token to post to FB?
fc = new FacebookClient(token);
JsonObject json = new JsonObject();
json.Add("name", HtmlUtils.StripHtmlTags(#event.Title));
json.Add("description", HtmlUtils.StripHtmlTags(#event.Description));
json.Add("start_time", #event.StartDate.ToString("yyyy-MM-dd HH:mm"));
json.Add("no_feed_story","true");
//here i get an error
var id = fc.post("/myappid/events",json);
(OAuthException - #1) An unknown error has occurred.
What am I doing wrong? My app is not in sandbox mode as well.
You used -
\POST /myappid/events
This is an invalid request. The events are posted on the user page or the fan page *via* an app.
There's nothing like "posting an event on the app"
I am trying to send a notification (not app requests) to registered users, server-side using the C# Facebook SDK. I actually get a success message, but no notification is sent. Our app is not in sandbox and has canvas enabled. The code below show attempts to send both notifications and app requests--the notifications do nothing, but the app request works:
var fb = new FacebookClient();
dynamic result = fb.Get("oauth/access_token", new
{
client_id = "MY_APP_KEY",
client_secret = "MY_SECRET",
grant_type = "client_credentials"
});
fb.AccessToken = result.access_token;
dynamic nparams = new ExpandoObject();
nparams.template = "Hello from my app!";
nparams.href = "Home";
dynamic requestParams = new ExpandoObject();
requestParams.message = "Hi there";
requestParams.title = "Please use this awesome app";
foreach (string facebookID in facebookIDs)
{
// This returns success:true, but doesn't actually do anything
var postResult = fb.Post(facebookID + "/notifications", nparams);
// This works and shows a request in the app center
var postResult2 = fb.Post(facebookID + "/apprequests", requestParams);
}
The fact that apprequests send here tells me the access token is ok, so why don't notifications work? We really need to do this server-side--has anyone been able to do that?
Got a response from facebook on this . . . basically, that this feature is in beta and it may just not work, despite giving Success responses
Good snippet Anthony. Appears to be working consistently now. +1 for your attempt.
PS: In case anyone stumbles upon this code, "facebookID" is a numeric Id and can be derived using the following link http://findmyfacebookid.com/