Introduction

There are many free rating controls on the internet, but I didn't find any control which fits these features:

  • Works well in UpdatePanel, GridView
  • Easy to customize UI and behavior
  • Auto generates JavaScript (does not need an external JS file)

So I decided to write an ASP.NET custom control as per my requirements.

Using the Code

How to use this control?

  1. Add a reference to the control,
  2. and: 
    <%@ Page Language="C#" AutoEventWireup="true" 
	Codebehind="WebForm1.aspx.cs" Inherits="WebApplication1.WebForm1" %>

<%@ Register Namespace="ASPnetRater" Assembly="ASPnetRater" TagPrefix="cc" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
	"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <cc:Rater ID="Rater1" runat="server" 
		ImageOff="/assets/images/rating_grey_star.gif"
                Value="3" MaxValue="5" ImageOn="/assets/images/rating_red_star.gif"
                ToolTip="I'm a rater" OnCommand="Rater1_Command" 
		ImageOver="/assets/images/rating_yellow_star.gif"></cc:Rater>
        </div>
    </form>
</body>
</html>

This is the result:

Normal Status

Hover Status

Points of Interest

If you want the control to work well in an UpdatePanel, please make the control become a trigger of UpdatePanel: 

ScriptManager1.RegisterAsyncPostBackControl(Rater1);

History

  • April 08, 2009: First draft
  • April 15, 2010: Updates
    • Fixed a bug while posting back, as reported by yuyejian
    • Uses the Enabled property to enable/disable the control
    • Image's URL supports URLs like "~/assets/..."
  • June 29, 2010: Updated source code
    • Fixed bug reported by maorray (Doesn't save/load the value of the rater to ControlState)
  • April 18, 2011: Updated source code
    • Added CommandName property
    • Calls base.RaiseBubbleEvent() in OnCommand()
    • This update will help the parent control such as GridView, DataList and the like to catch OnItemCommand event.
Tag asp.net,rating,control
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