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Post Photo and Status On Facebook using Asp.net(C#).


Here we create one web application for post photo or status on Facebook.

First of all we have to download FaceBookAPI.dll from Internet, then after add FaceBookAPI.dll in your project.

Then after add name space on code side : using FaceBookAPI

Default1.aspx.CS 

protected void Page_Load(object sender, EventArgs e)
{
   FaceBookConnect.Authorize("publish_actions","http://localhost:123/Default2.aspx");  

}

When we run Default1.aspx then it call Default2.aspx page

Default2.aspx

<html lang="en">  
<head id="Head1" runat="server"> </head>
 
<body>
    <form id="form1" runat="server">
        <asp:TextBox ID="txtMessage" runat="server" TextMode="MultiLine"></asp:TextBox>
        <asp:FileUpload ID="FileUpload1" runat="server"></asp:FileUpload>
        <hr />
        <asp:Button ID="btnUpload" runat="server" Text="Ulpoad" OnClick="btnUpload_Click" /> </form>
</body>  

</html>

Default2.aspx.CS

In this page we have to set App Key and App Secret key for authentication and for get Token Key.

protected void Page_Load(object sender, EventArgs e)
{
    FaceBookConnect.API_Key = "App Key";
    FaceBookConnect.API_Secret = "App Secret Key";
    if (!IsPostBack)
    {
        string code = Request.QueryString["code"];
        if (!string.IsNullOrEmpty(code))
        {
            ViewState["Code"] = code;
        }
    }
}

Set your Caption ,Name and Meassage that you want to upload on facebook.

protected void btnUpload_Click(object sender, EventArgs e)
{
    Dictionary < string, string > data = new Dictionary < string, string > ();
    data.Add("caption", "nikhil sangani");
    data.Add("name", "nikhil sangani");
    data.Add("message", txtMessage.Text);
    Session["File"] = FileUpload1.PostedFile;
    Session["Message"] = txtMessage.Text;
    FaceBookConnect.Post(ViewState["Code"].ToString(), "me/feed", data);
    FaceBookConnect.PostFile(ViewState["Code"].ToString(), "me/photos", (HttpPostedFile)    
Session["File"], Session["Message"].ToString());

}

When we click on upload button then it post photo and text on your Facebook account.
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