User-1078128378 posted
Hi All,
I want to get my Facebook friends list in asp.net application.
I am using Facebook c# sdk.
I created a Facebook App.
I am using following code:
Default2.aspx:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div style=" border: 1px solid black; height: 350px; width: auto">
<br />
<center>
<asp:Button ID="Button1" runat="server" Text="Login with facebook" OnClick="Button1_Click" />
<br />
<asp:Label ID="lblEmail" runat="server" Text="Email"></asp:Label>
<br />
<asp:Label ID="Label2" runat="server" Text="Friends List:"></asp:Label>
<br />
<asp:ListBox ID="ListBox1" style="width: 300px; height: 200px;" runat="server"></asp:ListBox>
<br />
<asp:Label ID="lblName" runat="server" Text="Name:"></asp:Label>
<br />
<asp:Label ID="lblUserId" runat="server" Text="User Id:"></asp:Label>
</center>
</div>
</form>
</body>
</html>
Default2.aspx.cs:
using Facebook;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class Default2 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
//check user is already logged in
if (Session["AccessToken"] != null)
{
GetUserData(Session["AccessToken"].ToString());
}
else if (Request.QueryString["code"] != null)
{
string accessCode = Request.QueryString["code"].ToString();
var fb = new FacebookClient();
// throws OAuthException
dynamic result = fb.Post("oauth/access_token", new
{
client_id = "745526535524148",
client_secret = "66bede4eea46a0bc4a2222e0b0260a5b",
redirect_uri = "http://localhost:60234/Default2.aspx",
code = accessCode
});
var accessToken = result.access_token;
var expires = result.expires;
// Store the access token in the session
Session["AccessToken"] = accessToken;
GetUserData(Session["AccessToken"].ToString());
}
}
private void GetUserData(string accessToken)
{
var fb = new FacebookClient(accessToken);
dynamic me = fb.Get("me?fields=friends,name,email");
string id = me.id; // Store in database
string email = me.email; // Store in database
string FBName = me.name; // Store in database
lblEmail.Text = "Email="+email;
lblUserId.Text = "User Id="+id;
// NameText.Visible = true;
lblName.Text = FBName;
ViewState["FBName"] = FBName; // Storing User's Name in ViewState
try
{
var friends = me.friends;
foreach (var friend in (JsonArray)friends["data"])
{
ListItem item = new ListItem((string)(((JsonObject)friend)["name"]), (string)(((JsonObject)friend)["id"]));
ListBox1.Items.Add(item);
}
}
catch(Exception e)
{
ListBox1.Items.Add(e.Message.ToString());
}
Button1.Text = "Log Out";
}
private void dologin()
{
FacebookClient fb = new FacebookClient();
var loginUrl = fb.GetLoginUrl(new
{
client_id = "745526535524148",
redirect_uri = "http://localhost:60234/Default2.aspx",
response_type = "code",
scope = "email" // Add other permissions as needed
});
Response.Redirect(loginUrl.AbsoluteUri);
}
protected void Button1_Click(object sender, EventArgs e)
{
if (Button1.Text == "Log Out")
logout();
else
{
dologin();
}
}
private void logout()
{
var fb = new FacebookClient();
var logoutUrl = fb.GetLogoutUrl(new
{
access_token = Session["AccessToken"],
next = "http://localhost:60234/Default2.aspx"
});
// User Logged out, remove access token from session
Session.Remove("AccessToken");
Button1.Text = "Log In with Fb";
Response.Redirect(logoutUrl.AbsoluteUri);
}
}
Output:
i am getting following output:
https://www.facebook.com/photo.php?fbid=704006743040338&set=a.140484002725951.30333.100002930567133&type=1&theater
I am getting error when fetching friends list
i checked in debug mode i am getting null value from json
what I am missing in code?
how can i get the friends list?
and I didnot set any app permission to my app in facebook.
Thanks,
Murali.
