Using Function Keys (F1-F2-F3 etc) in ASP.NET Websites with the help of jQuery


Introduction

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Last day when I saw a banking website that supports the function keys I thought to write a post on this topic. I don’t know what platform they (bank) are using but I thought to write it in ASP.NET.

I am going to consume the jQuery methods to make it possible. So, follow the steps to create this application.

Step 1

Add the reference of jQuery file in the head section of the page, for example:

    <script type="text/javascript" src="Scripts/jquery-1.4.1.min.js"></script>

Step 2

Add following jQuery method in the head section of the page.

    <script type="text/javascript">
        $(function () {
            $(document).keyup(function (e) {
                var key = (e.keyCode ? e.keyCode : e.charCode);
                switch (key) {
                    case 112:
                        navigateUrl($('a[id$=lnk1]'));
                        break;
                    case 113:
                        navigateUrl($('a[id$=lnk2]'));
                        break;
                    case 114:
                        navigateUrl($('a[id$=lnk3]'));
                        break;
                    default: ;
                }
            });
            function navigateUrl(jObj) {
                window.location.href = $(jObj).attr("href");
            }
        });      
    </script>

Step 3

Here is the list of function keys and its key code:

Function key
Key code
F1
112
F2
113
F3
114
F4
115
F5
116
F6
117
F7
118
F8
119
F9
120
F10
This key is reserved by the system and cannot be used
F11
122
F12
123
F13
124
F14
125
F15
126

Step 4

Design the page body as given below:

    <p>
        Press
        <b>F1 for My Blog Page</b>
        <br />
        <b>F2 for My ASP.NET Posts Page</b>
        <br />
        <b>F3 for About Me Page</b>
    </p>
    <div>
        <asp:HyperLink ID="lnk1" runat="server" NavigateUrl="http://www.itorian.com">My Blog</asp:HyperLink>
        <br />
        <asp:HyperLink ID="lnk2" runat="server" NavigateUrl="http://www.itorian.com/articles/aspdotnet/article.aspx">My ASP.NET Posts</asp:HyperLink>
        <br />
        <asp:HyperLink ID="lnk3" runat="server" NavigateUrl="http://www.itorian.com/about">About Me</asp:HyperLink>
    </div>

Step 5

Now, all we set to run the project and check it. Let’s look at my complete codes.

Complete Code

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>

<!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>ASP.NET & jQuery Post</title>
    <script type="text/javascript" src="Scripts/jquery-1.4.1.min.js"></script>
    <script type="text/javascript">
        $(function () {
            $(document).keyup(function (e) {
                var key = (e.keyCode ? e.keyCode : e.charCode);
                switch (key) {
                    case 112:
                        navigateUrl($('a[id$=lnk1]'));
                        break;
                    case 113:
                        navigateUrl($('a[id$=lnk2]'));
                        break;
                    case 114:
                        navigateUrl($('a[id$=lnk3]'));
                        break;
                    default: ;
                }
            });
            function navigateUrl(jObj) {
                window.location.href = $(jObj).attr("href");
            }
        });      
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <p>
        Press
        <b>F1 for My Blog Page</b>
        <br />
        <b>F2 for My ASP.NET Posts Page</b>
        <br />
        <b>F3 for About Me Page</b>
    </p>
    <div>
        <asp:HyperLink ID="lnk1" runat="server" NavigateUrl="http://www.itorian.com">My Blog</asp:HyperLink>
        <br />
        <asp:HyperLink ID="lnk2" runat="server" NavigateUrl="http://www.itorian.com/articles/aspdotnet/article.aspx">My ASP.NET Posts</asp:HyperLink>
        <br />
        <asp:HyperLink ID="lnk3" runat="server" NavigateUrl="http://www.itorian.com/about">About Me</asp:HyperLink>
    </div>
    </form>
</body>
</html>

I recommend you to download the attached file and check it. I hope you like it. Thanks.

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