如何在Facebook发布从我的asp.net MVC 3网站

我做了什么样的相似，当我的MVC应用程序一个共享按钮，用户点击，它张贴在他的墙什么的。使用的OAuth对话框，问题是，它会在浏览器重定向到一个Facebook站点为用户登录并接受该应用程序的权限。

I did something kind of similar, when a user clicks on a "share" button on my mvc app, it posts something on his wall. The problem using the oauth dialog, is that it will redirect the browser to a facebook site for the user to log in and accept the application permissions.

在共享按钮，我把它挂到这个网址：

On the "share" button, I linked it to this url:

                        <a href=""https://www.facebook.com/dialog/oauth?client_id=[YOUR_APP_ID]&redirect_uri=[THE_REDIRECT_PAGE]/&scope=publish_stream"">
                        <img src='@Url.Content("~/Images/facebook_share.png")' alt="Share on Facebook!" style="height:28px" />
                    </a>

YOUR_APP_ID是你的Facebook应用程序ID。
THE_REDIRECT_PAGE是您网站上的公开页面，一旦用户登录并接受的权限，Facebook将自动重定向。当Facebook的重定向，其追加名为code给它的查询参数。
注：该重定向页面必须以/最后，它不能以文件结束，否则它不能正常工作

YOUR_APP_ID is your facebook application ID. THE_REDIRECT_PAGE is a public page on your site that facebook will automatically redirect once the user has logged in and accepted the permissions. When facebook redirects, it appends a querystring parameter called "code" to it. NOTE: The redirect page MUST END with a "/", it cannot end with a document, or else it doesn't work!

一旦用户已经接受了你的要求，你必须问Facebook的另一个code，称为访问code，用于发布用户的墙上。

Once the user has accepted your request, you must ask facebook another code, called access code, used to post on the user's wall.

这code是在重定向网页上：

This code is on the redirect page:

        public ActionResult Index(string code)
    {
        string fbAuthCode = Request["code"]; //The authorization code.
        string fbAppId = "XXXXXXX"; //Your fb application id.
        string fbSecretAppId = "XXXXXXXXXXXXXXXXXXXXX"; //Your fb secret app id, it is found on the fb application configuration page.
        string redirectUrl = string.Format("[THE_REDIRECT_PAGE]", locationPointId, entryLocationId); //The redirect url. THIS MUST BE THE EXACT SAME REDIRECT URL USED ON THE JAVASCRIPT LINK!
        string fbUrl = "https://graph.facebook.com/oauth/access_token?client_id=" + fbAppId + "&redirect_uri=" + redirectUrl + "&client_secret=" + fbSecretAppId + "&code=" + fbAuthCode; //Url used to post.
        string accessToken = string.Empty;

        try
        {
            WebClient client = new WebClient();
            using (Stream stream = client.OpenRead(fbUrl))
            using (StreamReader reader = new StreamReader(stream))
            {
                accessToken = reader.ReadToEnd().Split('&')[0].Replace("access_token=", string.Empty);
                reader.Close();
            }
        }
        catch (Exception ex)
        {
            throw new Exception("An error ocurred while trying to get the fb token in " + fbUrl, ex);
        }

一旦你的访问令牌，就可以发布到用户的墙：

Once you have the access token, you can post to the user wall:

            string postUrl = "https://graph.facebook.com/me/feed";
        string postParameters;

        postParameters = string.Format("message={0}&picture={1}&name={2}&caption={2}&description={3}&link={4}&access_token={5}",
                                            "[Message]",
                                            "[PictureUrl]",
                                            "[Name]",
                                            "[Caption]",
                                            "[Link]",
                                            accessToken);

        try
        {
            System.Net.WebRequest req = System.Net.WebRequest.Create(postUrl);

            req.ContentType = "application/x-www-form-urlencoded";
            req.Method = "POST";

            byte[] bytes = System.Text.Encoding.UTF8.GetBytes(postParameters);
            req.ContentLength = bytes.Length;
            using (System.IO.Stream os = req.GetRequestStream())
            {
                os.Write(bytes, 0, bytes.Length); //Push it out there
                os.Close();
                using (WebResponse resp = req.GetResponse())
                using (StreamReader sr = new StreamReader(resp.GetResponseStream()))
                {
                    ViewBag.PostResult = sr.ReadToEnd().Trim();
                    sr.Close();
                }
                os.Close();
            }
        }
        catch (Exception ex)
        {
            throw new Exception("An error ocurred while posting data to the user's wall: " + postUrl + "?" + postParameters, ex);
        }

        return RedirectToAction(XXXXXXXXXXXxx....); //Then i redirect to another page.

您可以看到我扔张贴URL（用于调试目的）除外上。
使用此URL通常可以去Facebook的图形API资源管理器或短绒并检查真正的错误。

You can see that on the exception I throw the posted url (for debugging purposes). With that url you can usually go to the facebook Graph API Explorer or the Linter and check the real error.

我不知道这是不是你想要什么，但希望它给你一个开球...
我挣扎着这几天，因为开放式图形Facebook的文档不是很好吗，至少对我们来说不使用卷曲：）

I don't know if this is exactly what you want but hope it gives you a kickoff... I've struggled a few days with this, because facebook documentation on open graph is not very good yet, at least for us that don't use curl :)

https://developers.facebook.com/docs/opengraph/tutorial/
https://developers.facebook.com/docs/opengraph/

https://developers.facebook.com/docs/opengraph/tutorial/ https://developers.facebook.com/docs/opengraph/

希望它帮助。
MT。

Hope it helps. MT.