I have developed a desktop application to tag friends on comment via Facebook API C#. It worked perfectly until Facebook had new update in 28 or 29 Sept, don't remember exactly, then it does not work right now. I use format #[fb_user_id:fb_name] to tag friend. However, Facebook will replace that string by an empty string in new update. Who knows what's new format or how to tag friend on comment by graph api.
this how to tag friend on status.
protected void btnPost_Click(object sender, EventArgs e)
{
lblPost.Text = txtPost.Text;
var client = new FacebookClient("tokenHere");
var parameters = new Dictionary<string, object>
{
{ "message", "your status here" },
{"tags" , "friend id here, only number"},
{"place" , "place ID, only number"}
};
client.Post("me/feed", parameters);
lblPost.ForeColor = System.Drawing.Color.Red;
lblPost.Text = "Status Updated!";
}
In my application image has to post to Facebook,mail.Sorry i am new to windows phone.i don't have a idea.please help me.what i can do first.
If you want to share a status you can use your facebook account on your phone using Share link task (with this method you can only post on your wall) http://msdn.microsoft.com/en-us/library/hh394027%28v=vs.92%29.aspx
To post (pictures, messages or others) on every wall you have access you need some things :
First you need to create a facebook application using this link :
Facebook developers
After that you need to identify yourself using a WebBrowser control with the link related to your application. The application requests authorization to perform certain actions such as posting. You need to detail the authorizations like this :
Dictionary<string, string> uriParams = new Dictionary<string, string>() {
{"client_id", "your app id"},
{"response_type", "token"},
{"scope", "user_about_me, offline_access, publish_stream"}, //The rights
{"redirect_uri", "http://www.facebook.com/connect/login_success.html"},
{"display", "touch"}
};
The Dictionary also contains the redirection uri to define if the operation was successful.
Finally you are authentified and receive an access token. Now you can use a WebRequest POST to post a message using this token :
WebRequest request = HttpWebRequest.Create("https://graph.facebook.com/" + the id of your wall + "/feed");
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.BeginGetRequestStream((reqResult) =>
{
using (Stream strm = request.EndGetRequestStream(reqResult))
using (StreamWriter writer = new StreamWriter(strm))
{
writer.Write(client.AccessToken);
writer.Write("&message=" + HttpUtility.UrlEncode(status));
}
request.BeginGetResponse((result) =>
{
try
{
var response = request.EndGetResponse(result);
using (var rstrm = response.GetResponseStream())
{
var serializer = new DataContractJsonSerializer(typeof(FacebookPostResponse));
var postResponse = serializer.ReadObject(rstrm) as FacebookPostResponse;
callback(true, null);
}
}
catch (Exception ex)
{
callback(false, ex);
}
}, null);
}, null);
Here is how to post a message on a facebook page,
You should give the Facebook C# SDK a try
Facebook C# SDK
I have built this in once in an app of mine. They have plenty examples available which should be useful.
I am developing a multi protocol client (currently Twitter, Facebook and Google Reader) for Windows using C# and wanted to extend its functions to send links to Facebook (currently I "only" have text status messages, comments and likes).
So I wrote this quite small method here:
public void PostLink(string text, string url)
{
if (string.IsNullOrEmpty(url))
{
PostTextStatus(text);
return;
}
dynamic parameters = new ExpandoObject();
parameters.message = text;
parameters.link = System.Web.HttpUtility.UrlEncode(url);
dynamic result = facebookClient.Post("me/links", parameters);
UpdateNewsFeed();
}
But I get the following error message back from Facebook: "(OAuthException) (#1500) The url you supplied is invalid"
But at least as I read the API docs this should be the right url and I tried it also with my user ID instead of "me" and without the UrlEncode - no luck so far.
Any help appreciated :)
(Using latest stable version für Facebook C# SDK)
The used client is initiated by
facebookClient = new FacebookClient(AccessToken);
dynamic result = (IDictionary<string, object>)facebookClient.Get("me");
if (result != null)
{
LoginSuccessfull = true;
}
}
and the AccesToken and its permissions were retrieved using
IDictionary<string, object> loginParameters = new Dictionary<string, object>
{
{ "response_type", "token" },
{ "appId", appId},
{ "secret", appSecret }
};
Uri redirectUri = new Uri("http://www.li-ghun.de/Nymphicus/");
loginUri = FacebookOAuthClient.GetLoginUrl(appId, null, _extendedPermissions, loginParameters);
with I think quite more than enough permissons:
private string[] _extendedPermissions = new[] {
"user_activities",
"user_birthday",
"user_checkins",
"user_education_history",
"user_events",
"user_games_activity",
"user_groups",
"user_hometown",
"user_interests",
"user_likes",
"user_location",
"user_notes",
"user_online_presence",
"user_photo_video_tags",
"user_photos",
"user_questions",
"user_relationship_details",
"user_relationships",
"user_religion_politics",
"user_status",
"user_subscriptions",
"user_videos",
"user_website",
"user_work_history",
"friends_about_me",
"friends_activities",
"friends_birthday",
"friends_checkins",
"friends_education_history",
"friends_events",
"friends_games_activity",
"friends_groups",
"friends_hometown",
"friends_interests",
"friends_likes",
"friends_location",
"friends_notes",
"friends_online_presence",
"friends_photo_video_tags",
"friends_photos",
"friends_questions",
"friends_relationship_details",
"friends_relationships",
"friends_religion_politics",
"friends_status",
"friends_subscriptions",
"friends_videos",
"friends_website",
"friends_work_history",
"create_event",
"create_note",
"email",
"export_stream",
"manage_friendlists",
"manage_notifications",
"manage_pages",
"offline_access",
"photo_upload",
"publish_actions",
"publish_checkins",
"publish_stream",
"read_friendlists",
"read_insights",
"read_mailbox",
"read_requests",
"read_stream",
"rsvp_event",
"share_item",
"status_update",
"video_upload",
};
Problem has been all the time at myself being stupid - I accidently exchanged the parameters when calling my method so the text of the entry was in the link property and vica versa.
Stupid me :(
I think your issue lies in the URL being posted as the link. Be sure that URL is visible to the linter (https://developers.facebook.com/tools/lint).
Another thing is to try playing with the Graph API Explorer tool and see if you can use it to post a link. If so, then try changing the application drop down to the app you're having issues with and try posting the link again.
In my case i was posting "http://localhost:3000" and facebook reject it. I tried with "www.google.com" and it works
The error I was getting was, even though the URL itself was valid, the og:image was being set to //example.com/example.jpg and missing http: or https:. I blame Facebook for this one, for not accepting a valid URL that any browser will accept, but the Debugger definitely helped identify this and solved the issue.
https://developers.facebook.com/tools/lint
Currently I'm working on my HTML 5 ASP.Net Application,
Which has requirement of Graffiti Wall, When user draw something on my Wall(means on my HTML 5 Canvas element), and Press Share Button on my Page, at that time the whole picture should need to be post on one of the Facebook Page.
Now my question is that is this thing possible using C# facebook sdk by codeplex ?
if its possible, than how to post image on facebook fan page using this SDK??
Where can I get the good resource the implement this kind of functionality or similar code.
I've check the all examples given by them, there is no any example which post on the facebook fan page.
Or even other library that can implement this kind of functionality.
I've check this library, and see that it has FacebookClient,ExpandoObject, FacebookMediaObject kind of classes, but how to and where to use this classes,where are the description and sample code.
Thanks,
Jigar Shah
you can post to others wall using "{id}/feed"
if you want to post image/video on wall. Try downloading the samples from nuget.
Install-Package Facebook.Sample
Here is how to do using the graph api.
public static string UploadPictureToWall(string id, string accessToken, string filePath)
{
var mediaObject = new FacebookMediaObject
{
FileName = System.IO.Path.GetFileName(filePath),
ContentType = "image/jpeg"
};
mediaObject.SetValue(System.IO.File.ReadAllBytes(filePath));
try
{
var fb = new FacebookClient(accessToken);
var result = (IDictionary<string, object>)fb.Post(id + "/photos", new Dictionary<string, object>
{
{ "source", mediaObject },
{ "message","photo" }
});
var postId = (string)result["id"];
Console.WriteLine("Post Id: {0}", postId);
// Note: This json result is not the orginal json string as returned by Facebook.
Console.WriteLine("Json: {0}", result.ToString());
return postId;
}
catch (FacebookApiException ex)
{
// Note: make sure to handle this exception.
throw;
}
}
How to create a facebook event by using facebook api in asp.net.
Thanks.
public string CreateEvent(string accessToken)
{
FacebookClient facebookClient = new FacebookClient(accessToken);
Dictionary<string, object> createEventParameters = new Dictionary<string, object>();
createEventParameters.Add("name", "My birthday party )");
createEventParameters.Add("start_time", DateTime.Now.AddDays(2).ToUniversalTime().ToString());
createEventParameters.Add("end_time", DateTime.Now.AddDays(2).AddHours(4).ToUniversalTime().ToString());
createEventParameters.Add("owner", "Balaji Birajdar");
createEventParameters.Add("description", " ( a long description can be used here..)");
//Add the "venue" details
JsonObject venueParameters = new JsonObject();
venueParameters.Add("street", "dggdfgg");
venueParameters.Add("city", "gdfgf");
venueParameters.Add("state", "gfgdfgfg");
venueParameters.Add("zip", "gfdgdfg");
venueParameters.Add("country", "gfdgfg");
venueParameters.Add("latitude", "100.0");
venueParameters.Add("longitude", "100.0");
createEventParameters.Add("venue", venueParameters);
createEventParameters.Add("privacy", "OPEN");
createEventParameters.Add("location", "fhdhdfghgh");
//Add the event logo image
FacebookMediaObject logo = new FacebookMediaObject()
{
ContentType = "image/jpeg",
FileName = #"C:\logo.jpg"
};
logo.SetValue(File.ReadAllBytes(logo.FileName));
createEventParameters["#file.jpg"] = logo;
JsonObject resul = facebookClient.Post("/me/events", createEventParameters) as JsonObject;
return resul["id"].ToString();
}
I am using facebook graph apis with FacebookSdk from codeplex.
I am not able to post the venue with this code due to the open bug in facebook API. Other things work fine. I suggest you implement this venue parameters as well so that the functionality will work as soon as facebook resolves this issue.
Mark this as answer if it works for you.It will also help other people to save time on searching.
You might try this http://developers.facebook.com/docs/api