Question

在这里输入代码我一直在关注C＃的Facebook教程并获得访问令牌，我刚刚得到它但我似乎无法理解他们的教程中有关事件处理和重定向的步骤。我从来没有做过类似使用JavaScript到C＃的事情。我有以下内容：

<div id="fb-root"></div>
<script>
    window.fbAsyncInit = function () {
        FB.init({
            appId: '{app Id}', // App ID
            status: true, // check login status
            cookie: true, // enable cookies to allow the server to access the session
            xfbml: true  // parse XFBML
        });

        // Additional initialization code here

        FB.Event.subscribe('auth.authResponseChange', function (response) {
            if (response.status === 'connected') {
                // the user is logged in and has authenticated your
                // app, and response.authResponse supplies
                // the user's ID, a valid access token, a signed
                // request, and the time the access token 
                // and signed request each expire
                var uid = response.authResponse.userID;
                var accessToken = response.authResponse.accessToken;

                // TODO: Handle the access token

                // Do a post to the server to finish the logon
                // This is a form post since we don't want to use AJAX
                var form = document.createElement("form");
                form.setAttribute("method", 'post');
                form.setAttribute("action", '/FacebookLogin.ashx');

                var field = document.createElement("input");
                field.setAttribute("type", "hidden");
                field.setAttribute("name", 'accessToken');
                field.setAttribute("value", accessToken);
                form.appendChild(field);

                document.body.appendChild(form);
                form.submit();

            } else if (response.status === 'not_authorized') {
                // the user is logged in to Facebook, 
                // but has not authenticated your app
            } else {
                // the user isn't logged in to Facebook.
            }
        });
    };

    // Load the SDK Asynchronously
    (function (d) {
        var js, id = 'facebook-jssdk', ref = d.getElementsByTagName('script')[0];
        if (d.getElementById(id)) { return; }
        js = d.createElement('script'); js.id = id; js.async = true;
        js.src = "//connect.facebook.net/en_US/all.js";
        ref.parentNode.insertBefore(js, ref);
    }(document));
</script>

除了Facebook按钮，一切都可以找到，但是根据教程Here，我需要“接下来，创建一个页面，操作或处理程序来接收令牌并重定向用户。为此例如，我们将创建一个通用处理程序。“

他们使用这个：

public class FacebookLogin : IHttpHandler, System.Web.SessionState.IRequiresSessionState {

    public void ProcessRequest(HttpContext context) {
        var accessToken = context.Request["accessToken"];
        context.Session["AccessToken"] = accessToken;

        context.Response.Redirect("/MyUrlHere");
    }

    public bool IsReusable {
        get { return false; }
    }
}

我只是将它放在我的代码中，但它没有做任何事情。我只是不确定从这里做什么。如何让我的页面重定向到新页面，以便我可以这样做：

var accessToken = Session["AccessToken"].ToString();
var client = new FacebookClient(accessToken);
dynamic result = client.Get("me", new { fields = "name,id" });
string name = result.name;
string id = result.id;

Answer 1

确保不要将FacebokLogin处理程序放在aspx.cs代码后面的文件中。它必须是一个单独的.ashx文件。

在你的评论中你说FB.Event.subscribe（'auth.authResponseChange'，函数（响应）{...}永远不会被调用。尝试在FB.init中包含apiKey：“[OAuth token goes here]”不确定它是否会起作用但值得一试。

E.g。

FB.init({
    appId: '{app Id}', // App ID
    status: true, // check login status
    cookie: true, // enable cookies to allow the server to access the session
    xfbml: true,  // parse XFBML
    apiKey: "92834yv221985vn4139y845vn19835vynv519835vn"
});

Facebook登录后重定向C＃

1 个答案: