protected void Page_Load(object sender, EventArgs e)
{
FacebookConfig fbConfig = new FacebookConfig()
{
appId = "160789593985275",
apiSecret = "<secret>"
};
//for local debugging and custom persistent store - force domain - should allow cross-domain authentication using a single FB app
//copy your authtoken from your published app in your local app.
// fbConfig.appDomain = "fbAsp.hylas.be";
/*
note: for quick and easy debugging on localhost:
1. create facebook app for local debugging:
- App Domains: localhost
- Sandbox Mode: enabled (only admins can use app)
- Website with Facebook Login: http://localhost:<VS debugger or IIS express port>/Example/
2. it works! (after a minute or two...)
3. but you should put appId & apiSecrit in your web.config, using a web.config transformation to switch between your debug & release application
*/
fb = new Facebook(fbConfig);
this.initPermissions();
pnlPermissions.Visible = false;
if (IsPostBack)
{
if (txtAccessToken.Text.Length > 0) fb.setAccessToken(txtAccessToken.Text);
try
{
//fb.getUser should only fail when graph is unavailable or respons is corrupt
user = fb.getUser();
}
catch (Exception ex)
{
iPanel.Visible = false;
lblStatus.Text = "Error communicating with graph servers";
fbURL.NavigateUrl = fb.getLoginUrl();
ViewState["user"] = null;
return;
}
}
else
{
try
{
user = fb.getUser();
}
catch (Exception ex) {
iPanel.Visible = false;
lblStatus.Text = "Error communicating with graph servers";
fbURL.NavigateUrl = fb.getLoginUrl();
ViewState["user"] = null;
return;
}
if (!string.IsNullOrEmpty(user))
{
try
{
iPanel.Visible = true;
txtAccessToken.Text = fb.getAccessToken();
fbr = fb._graph("/me");
txtRequests.Text = "/me";
txtData.Text = fbr.ToString();
//txtUserObect.Text = fbr.ToString();
iPicture.ImageUrl = "https://graph.facebook.com/" + fbr["id"].ToString() + "/picture";
iProfile.Text = fbr["name"].ToString();// fbr["name"].value.ToString();
lblStatus.Text = "Connected";
btnConnect1.Text = "Disconnect";
btnConnect1.CssClass = "btnDisconnect";
fbr = fb._graph("/me/albums");
fbURL.NavigateUrl = fb.getLogoutUrl();
if (fbr.ContainsKey("data"))
{
for (var i = 0; i < fbr["data"].Count; i++)
AlbumList.Items.Add(new ListItem(fbr["data"][i.ToString()]["name"].ToString(), fbr["data"][i.ToString()]["id"].ToString()));
//or different way:
/*foreach (KeyValuePair<String, FacebookResponse> entry in fbr["data"])
{
AlbumList.Items.Add(new ListItem(entry.Value["name"].ToString()));
}*/
}
while (fbr.ContainsKey("paging") && fbr["paging"].ContainsKey("next"))
{
fbr = fb._graph(fbr["paging"]["next"].ToString());
if (fbr.ContainsKey("data"))
for (var i = 0; i < fbr["data"].Count; i++)
AlbumList.Items.Add(new ListItem(fbr["data"][i.ToString()]["name"].ToString(), fbr["data"][i.ToString()]["id"].ToString()));
}
Session.Remove("fb_connect_attempt") ;
}
catch (FacebookApiException ex)
{
//todo: log error
//probably session expired: we still have the persistent data: user_id and access_token, but the token is no longer valid
//best is just to clear the session/cookie OR auto reconnect
txtAccessToken.Text = "";
iPanel.Visible = false;
user = null;
if (Session["fb_connect_attempt"] == null)
{
Session["fb_connect_attempt"] = 1;
connectToFB();
}
}
}
else
{
iPanel.Visible = false;
lblStatus.Text = "Not Connected";
fbURL.NavigateUrl = fb.getLoginUrl();
ViewState["user"] = null;
}
}
}
