简单与Facebook C＃SDK不灵登录 [英] Simple log in with Facebook C# SDK not working

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本文介绍了简单与Facebook C＃SDK不灵登录的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我是新来Facebook的应用程序和最近读的可用文档。然后，我继续获得的NuGet Facebook的C＃SDK和阅读上手教程。

我修改了一点。我有3页：


  • 的Default.aspx：有与Facebook登录按钮

  • Protected.aspx：我最终想成为无首测不可访问的页面

  • DoSignIn.aspx：包含令牌的请求，并重定向回Default.aspx的


  • 在Default.aspx的，我有一个按钮，我重定向到Protected.aspx页面。就可以了，我有我展示令牌的标签。


现在，我的问题是这样的：


  • 当我点击与Facebook登录按钮，该按钮并没有改变，表明我登陆，那只能说明我登录，如果我做在页面上刷新。

  • 如果我点击按钮我重定向到Protected.aspx页，我不能看到标签上的标记，因为DoSignIn.aspx页从未被调用。

如果有人能指出我什么，我做错了（我几乎复制了教程的例子），我将非常感激。我花了近3小时，这一摆弄和搜索谷歌和SO遍，不知道去哪里了搜索。

感谢您的时间。

PS。我有最新的Facebook C＃SDK和App ID似乎做工精细，当我手动刷新我的浏览器，我的确登录。

我添加了code为3页：

Default.aspx的： 

 ＆LT;％@页面语言=C＃AutoEventWireup =真codeFILE =Default.aspx.cs继承=_默认％GT;！＆LT; D​​OCTYPE HTML PUBLIC -  // W3C // DTD XHTML 1.0过渡// ENhttp://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">
＆LT; HTML的xmlns =htt​​p://www.w3.org/1999/xhtml＆GT;
＆LT;头=服务器＆GT;
    ＆LT;标题＆GT;＆LT; /标题＆GT;
＆LT; /头＆GT;
＆LT;身体GT;
    ＆LT; D​​IV ID =FB-根＆GT;
    ＆LT; / DIV＆GT;
    ＆LT;脚本类型=文/ JavaScript的＆GT;
        window.fbAsyncInit =功能（）{
            FB.init（{
                APPID：I_INSERTED_MY_APP_ID_HERE'，//应用程序ID
                状态：真正的，//检查登录状态
                饼干：真，//启用cookies来允许服务器访问会话
                XFBML：//真正解析XFBML
            }）;
            FB.Event.subscribe（'auth.authResponseChange'，函数（响应）{
                如果（response.status ==='连接'）{
                    //用户登录并已经验证您的
                    //应用程序，response.authResponse用品
                    //用户的ID，一个有效的访问令牌，一个签名
                    //请求，以及时的访问令牌
                    //和签名的请求每个到期
                    VAR UID = response.authResponse.userID;
                    VAR的accessToken = response.authResponse.accessToken;                    //  - 处理访问令牌 - 
                    //完成后的服务器完成登录
                    //这是一个形式，因为后，我们不希望使用AJAX
                    VAR形式=使用document.createElement（表）;
                    form.setAttribute（法，后）;
                    form.setAttribute（行动，DoSignIn.aspx'）;                    VAR字段=使用document.createElement（输入）;
                    field.setAttribute（类型，隐藏）;
                    field.setAttribute（姓名，的accessToken'）;
                    field.setAttribute（价值的accessToken）;
                    form.appendChild（场）;                    document.body.appendChild（表）;
                    form.submit（）;                }否则如果（response.status ==='NOT_AUTHORIZED'）{
                    //用户登录到Facebook，
                    //但一直没有验证您的应用程序
                }其他{
                    //用户没有登录Facebook。
                }
            }）;
        };        //异步加载SDK
        （函数（D）{
            VAR JS，ID ='Facebook的jssdk'，REF = d.getElementsByTagName（'脚本'）[0];
            如果（d.getElementById（ID））{返回; }
            JS = d.createElement（'脚本'）; js.id = ID; js.async = TRUE;
            js.src =//connect.facebook.net/en_US/all.js;
            ref.parentNode.insertBefore（JS，REF）;
        }（文件））;
    ＆LT; / SCRIPT＆GT;
    ＆LT;表ID =form1的=服务器＆GT;
    ＆LT; D​​IV＆GT;
        ＆所述;股利类=FB-登录按钮数据显示-面=真的数据宽度=400数据最大值-行=1＆GT;
            通过Facebook登陆＆LT; / DIV＆GT;
        ＆LT; BR /＆GT;
        ＆LT; ASP：按钮的ID =Button1的=服务器的OnClick =的button1_Click文本=去保护/＆GT;
    ＆LT; / DIV＆GT;
    ＆LT; /表及GT;
＆LT; /身体GT;
＆LT; / HTML＆GT;

Default.aspx.cs： 

 公共部分类_Default：System.Web.UI.Page
{
    保护无效的Page_Load（对象发件人，EventArgs的发送）
    {    }
    保护无效的button1_Click（对象发件人，EventArgs的发送）
    {
        的Response.Redirect（Protected.aspx）;
    }
}

DoSignIn.aspx.cs： 

 公共部分类DoSignIn：System.Web.UI.Page
{
    保护无效的Page_Load（对象发件人，EventArgs的发送）
    {
        VAR的accessToken =请求[的accessToken];
        会议[的accessToken] =的accessToken;        的Response.Redirect（Default.aspx的）;
    }
}

Protected.aspx.cs： 

 公共部分类保护：System.Web.UI.Page
{
    保护无效的Page_Load（对象发件人，EventArgs的发送）
    {
        如果（会话[的accessToken]！= NULL）
        {
            Label1.Text =会话[的accessToken]的ToString（）。
        }
        其他
        {            Label1.Text =未验证;
        }
    }


解决方案

好吧，我已经花了几个小时寻找，终于找到为什么它不工作。它无关的code以上，但与Facebook的错误。实际上，似乎很多人不能有auth.authResponseChange启用作为会话刷新。我发现FB了一些错误报告描述了完整的问题，其中之一是这里

此问题开发/本地主机/当我有。我已经搬到了一个不同的方式来整合Facebook登录时，删除上述样品之前，我尝试下一个域名上传一个实际的托管服务器上。对于原因，我无法解释，它只是从那里工作。

总之，对于Facebook登录我目前追求的实现是解释的>。

I'm new to the Facebook apps and recently read the doc available. Then, I proceeded to get the Facebook C# SDK from NuGet and read the get started tutorial.

I modified it a little. I have 3 pages:

  • Default.aspx : has the "log in with facebook" button
  • Protected.aspx : the page that I ultimately want to be unaccessible without first logging in

  • DoSignIn.aspx : contains the request for the token and redirects back to Default.aspx

  • On the Default.aspx, I have a button that redirects me to the Protected.aspx page. On it, I have a label showing me the token.

Now, my issue is this:

  • When I click on the "log in with facebook" button, the button doesn't change to show that I'm logged in. It only shows that I'm logged in if I do a refresh on the page.
  • If I click on the button to redirect me to the Protected.aspx page, I can't see the token in the Label because the DoSignIn.aspx page was never called.

If someone could point me in what I do wrong (as I nearly copied the tutorial example), I would be very grateful. I spent the past 3 hours fiddling with this and searching Google and SO all over and don't know where to search anymore.

Thank you for your time.

PS. I have the latest Facebook C# SDK and the App ID seems to work fine as when I manually refresh my browser, I am indeed logged in.

I add the code for the 3 pages:

Default.aspx:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <div id="fb-root">
    </div>
    <script type="text/javascript">
        window.fbAsyncInit = function () {
            FB.init({
                appId: 'I_INSERTED_MY_APP_ID_HERE', // App ID
                status: true, // check login status
                cookie: true, // enable cookies to allow the server to access the session
                xfbml: true  // parse XFBML
            });


            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;

                    // - 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", 'DoSignIn.aspx');

                    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>
    <form id="form1" runat="server">
    <div>
        <div class="fb-login-button" data-show-faces="true" data-width="400" data-max-rows="1">
            Log in with Facebook</div>
        <br />
        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Go to protected" />
    </div>
    </form>
</body>
</html>

Default.aspx.cs:

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        Response.Redirect("Protected.aspx");
    }
}

DoSignIn.aspx.cs:

public partial class DoSignIn : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        var accessToken = Request["accessToken"];
        Session["AccessToken"] = accessToken;

        Response.Redirect("Default.aspx");
    }
}

Protected.aspx.cs:

public partial class Protected : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (Session["AccessToken"] != null)
        {
            Label1.Text = Session["AccessToken"].ToString();
        }
        else
        {

            Label1.Text = "Not authenticated";
        }
    }

解决方案

Right, I have spent hours searching and finally found why it is not working. It has nothing to do with the code above but with a Facebook bug. Actually, it seems that many people can't have the auth.authResponseChange to fire as the session refreshes. I found several bugs reports on FB describing the complete issue, one of them being here.

This issue I had when developing on /localhost/. I had already moved to a different way to integrate Facebook Login when, before deleting the above samples, I tried uploading it on an actual hosting server under a domain name. For a reason I can't explain, it just works from there.

Anyway, the implementation for the Facebook login I'm currently pursuing is explained here.

这篇关于简单与Facebook C＃SDK不灵登录的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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