Facebook SDK .NET - （＃200）用户尚未授权应用程序执行此操作 [英] Facebook SDK .NET - (#200) The user hasn't authorized the application to perform this action

问题描述

我正在尝试从C＃Web应用程序向Facebook页面发送消息。我收到以下异常抛出调用 FacebookClient.Post（...）：

FacebookOAuthException （OAuthException - ＃200）（＃200）用户没有
授权应用程序执行此操作

代码：

  var facebookClient = new FacebookClient（）; 
 facebookClient.AppId = appId; 
 facebookClient.AppSecret = appSecret; 
 
 if（Request [code] == null）
 {
 var authUrl = facebookClient.GetLoginUrl（new 
 {
 client_id = appId， 
 client_secret = appSecret，
 scope =publish_stream，
 redirect_uri = Request.Url.AbsoluteUri 
}）; 
 
 Response.Redirect（authUrl.AbsoluteUri）; 
} 
 else 
 {
动态结果= facebookClient.Get（oauth / access_token，新
 {
 client_id = appId，
 client_secret = appSecret，
 grant_type =client_credentials，
 redirect_uri = Request.Url.AbsoluteUri，
 code = Request [code] 
}）; 
 
 facebookClient.AccessToken = result.access_token; 
 //存储访问令牌
} 
  

发送消息：

  protected void PublishMessage（string message）
 {
 FacebookClient client = new FacebookClient（AccessToken）; 
 
 client.AppId = ApplicationId; 
 client.AppSecret = ApplicationSecret; 
 
动态参数= new ExpandoObject（）; 
 parameters.message = message; 
 
 client.Post（PageName +/ feed，参数）; 
} 
  

我接受以下Facebook提示，以确保该应用可以访问： p>

在我的Facebook个人资料设置中，应用程序如下所示：

我正在使用Facebook SDK for .NET v6.4.2（最新版本）。

解决方案

这可能是一个愚蠢的问题，但您是否从您的访问令牌请求中丢失了请求代码？不应该这样吗？

 动态结果= facebookClient.Get（oauth / access_token，new 
 {
 client_id = appId，
 client_secret = appSecret，
 grant_type =authorization_code
 redirect_uri = Request.Url.AbsoluteUri，
 code = Request [code] 
}）; 
  

修改刚刚意识到，使用不同的grant_type时，请求代码：）

I am trying to post a message to a Facebook page from a C# web application. I am getting the following exception thrown on calling FacebookClient.Post(...):

FacebookOAuthException (OAuthException - #200) (#200) The user hasn't authorized the application to perform this action

Code:

var facebookClient = new FacebookClient();
facebookClient.AppId = appId;
facebookClient.AppSecret = appSecret;

if (Request["code"] == null)
{
    var authUrl = facebookClient.GetLoginUrl(new
    {
        client_id = appId,
        client_secret = appSecret,
        scope = "publish_stream",
        redirect_uri = Request.Url.AbsoluteUri
    });

    Response.Redirect(authUrl.AbsoluteUri);
}
else
{
    dynamic result = facebookClient.Get("oauth/access_token", new
    {
        client_id = appId,
        client_secret = appSecret,
        grant_type = "client_credentials",
        redirect_uri = Request.Url.AbsoluteUri,
        code = Request["code"]
    });

    facebookClient.AccessToken = result.access_token;
    // Store access token
}

Sending a message:

protected void PublishMessage(string message)
{
    FacebookClient client = new FacebookClient(AccessToken);

    client.AppId = ApplicationId;
    client.AppSecret = ApplicationSecret;

    dynamic parameters = new ExpandoObject();
    parameters.message = message;

    client.Post(PageName + "/feed", parameters);
}

I accept the following Facebook prompts to ensure that the app has access:

And in my Facebook profile settings, the app looks like this:

I am using the Facebook SDK for .NET v6.4.2 (the latest).

解决方案

This may seem a silly question, but aren't you missing the Request code from your access token request? Shouldn't it be like this?

dynamic result = facebookClient.Get("oauth/access_token", new
{
    client_id = appId,
    client_secret = appSecret,
    grant_type = "authorization_code"
    redirect_uri = Request.Url.AbsoluteUri,
    code = Request["code"]
});

Edit Just realized, you have to use a different grant_type when using the request code :)

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