CODEWITHSUNDEEP
c#asp.net.netfacebookfacebook-graph-api
Dave New
Dave New

Reputation: 40002

Facebook SDK .NET - (#200) The user hasn't authorized the application to perform this action

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:

enter image description here

enter image description here

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

enter image description here

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

Upvotes: 2

Views: 5163

Answers (1)

Melvin DVaz
Melvin DVaz

Reputation: 1236

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 :)

Upvotes: 2

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