Posting Image and Text in Facebook:

For Posting images and text messages in Facebook, you have to follow these steps:

Step-1:

Create a new ASP.Net Solution and Add a Default.aspx page. Then copy its localhost url.

Step-2:

Log in to your Facebook account. Then Open this given link https://developers.facebook.com/apps.

Step-3:

Click on “Add a new App”. Then a popup window will open.

Step-4:

In this popup, write your Application Name in Display Name and Select Category. Then Click on Create App ID. Then it will ask for security check. Then Submit it.

Step-5:

After Submit a developer Application window will open. And go to the settings page.

Then Copy the App ID and App Secret for your solution.

Step-6:

Then click on Add Platform and choose website. And set your website or localhost url.

Step-7:

Go to your menu bar option, select Add Product and then choose Facebook login option.

Step-8:

Now go to the Facebook Login Page. And give your website url or localhost url in Valid OAuth redirect URIs. Then click on save changes

Step-9:

Then go to the App Review page. Then set your created App public true.

Then click on start a submission button.

Then select all items from this submission page and click add items.

Step-10:

Now you go to your ASP.Net solution. And a “aspsnippets.facebookapi.dll” file in your solution reference.

Step-11:

Go to your Default.aspx page and add controls in your design page.

<asp:FileUpload ID="FileUpload1" runat="server" />

    <br />

    <br />

    <asp:TextBox ID="txtMessage" runat="server" TextMode = "MultiLine"></asp:TextBox>

    <hr />

    <asp:Button ID="btnUpload" runat="server" Text="Upload" OnClick = "UploadPhoto" />

 

Step-12:

Write this below coding in your “Default.aspx.cs” page:

1.Add Namespace:

using ASPSnippets.FaceBookAPI;

2. Write this below coding in “Page_Load” event.  

        FaceBookConnect.API_Key = "404417453247103";

        FaceBookConnect.API_Secret = "03c91fd2103207adb84508249e6848dd";

        if (!IsPostBack)

        {

            HttpPostedFile updfile=(HttpPostedFile)Session["File"];

            string code = Request.QueryString["code"];

            if (!string.IsNullOrEmpty(code))

            {

                if (updfile.FileName != "")

                {

                    FaceBookConnect.PostFile(code, "me/photos", updfile, Session["Message"].ToString());

                    Session["File"] = null;

                    Session["Message"] = null;

                }

                else

                {

                    Dictionary<string, string> data = new Dictionary<string, string>();

                    data.Add("message", Session["Message"].ToString());

                    FaceBookConnect.Post(code, "me/feed", data);

                    Session["File"] = null;

                    Session["Message"] = null;

                }

            }

        }

   

3.Write these code in button click event:

        Session["File"] = FileUpload1.PostedFile!=null?FileUpload1.PostedFile:null;

        Session["Message"] = txtMessage.Text;

        FaceBookConnect.Authorize("user_photos,publish_actions", Request.Url.AbsoluteUri.Split('?')[0]);

        ClientScript.RegisterStartupScript(GetType(), "alert", "alert('Image has been shared.');", true);