Facebook Subscribe to Event ASP.NET control is used to inform an application by executing event handler about an event made by a user. Event can be when somebody likes a page by pressing on Like Button or when somebody puts a comment in Facebook Comments Box. A list of all possible events is given under configuration section. Compiled version and source code version of this ASP.NET control are available in C# and VB.NET programming languages, as part of Facebook ASP.NET (C# and VB.NET) Control library.

Configuration

Configuration of the Facebook Subscribe to Event ASP.NET control is done in ASPX page by setting the event handler to execute a specific some code when a particular event occurs. If dynamic setting of properties is required, they can be also set in the code behind, for example on Page_Load method. Following tables shows the list of properties and the list of all possible events.

Property Name

Type

Description

OnEventTrigger

Event Handler

Execute some code when a particular event occurs

EventName

String

Name of the event, see the list bellow for details

ResponseValue

String

JSON formated string of response

Event Name

Description

Login

Triggers when authorisation status changes to connected

Status

Triggers when login status changes

AuthResponse

Triggers when authorization response changes

Logout

Triggers when user logs out

Prompt

Triggers when user is prompted to log in

Render

Triggers when a call to FB.XFBML.parse() completes.

Like

Triggers when when user likes a page

Unlike

Triggers when a user unlikes a page

Comment

Triggers when when a user puts a comment in the Facebook Comments box

Uncomment

TTriggers when a user deletes a comment from the Facebook Comments box

Message

Triggers when when a user sends a message using Facebook Send Button

Usage Examples:

Following examples show registration and insertion of Facebook Subscribe to Event ASP.NET control in ASPX file. The example shows Facebook Subscribe to Event configured to trigger on Like event. Examples of ASPX files show only the code required for registration and integration of ASP.NET control in a web page. To see all requirements for registered components, including JavaScript, CSS style and header setting, please look at the manual for page requirements. For following examples, all page requirements are placed in ASP.NET master page. Important parts for registration and integration of Facebook Send Button inside the ASP.NET page are highlighted.

 <%@ Page MasterPageFile="~/Master.Master" AutoEventWireup="true" Inherits="FVK_Demo.SubscribeToEvent" %>
 <%@ Register TagPrefix="fvk" TagName="sevent" Src="~/FVK/SubscribeToEvent.ascx" %%>
 <asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server"%>
    <title%>Facebook Like Gate for ASP.NET</title%>
    <meta name="description" content="ASP.NET implementation of Facebook Subscribe to Event in C# and VB.NET" /%>
 </asp:Content%>
 <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server"%>
    <fvk:sevent ID="sevent1" runat="server" EventName="Like" OnEventTrigger="OnLike" /%>
 </asp:Content%>