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Dynamically Created Radio Buttons in Javascript

Posted by Sandeep Singh Shekhawat Blogs | JavaScript Oct 13, 2012
Using one Button and a Div to create radio button pair (Yes/No) on button click. I described by comment on each line which help to understand the view.

Using a Button and a Div to create radio button pair (Yes / No) on button click. I described by comment on each line which help to understand the view.

Source Code:

 <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="RadioDemo.aspx.cs" 
Inherits="JavascriptTutorial.RadioDemo"%> 

<!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></title>

    <script type="text/javascript">

 

    /* Getting Id of Div in which radio button will be add*/

        var containerDivClientId = "<%= containerDiv.ClientID %>";

 

    /*variable count uses for define unique Ids of radio buttons and group name*/

        var count = 100;

 

    /*This function call by button OnClientClick event and uses for create radio buttons*/

        function dynamicRadioButton()

        {

            /* create a radio button */

            var radioYes = document.createElement("input");

            radioYes.setAttribute("type", "radio");

 

            /*Set id of new created radio button*/

            radioYes.setAttribute("id", "radioYes" + count);

 

            /*set unique group name for pair of Yes / No */

            radioYes.setAttribute("name", "Boolean" + count);

 

            /*creating label for Text to Radio button*/

            var lblYes = document.createElement("lable");

 

            /*create text node for label Text which display for Radio button*/

            var textYes = document.createTextNode("Yes");

 

            /*add text to new create lable*/

            lblYes.appendChild(textYes);

 

            /*add radio button to Div*/

            containerDiv.appendChild(radioYes);

 

            /*add label text for radio button to Div*/

            containerDiv.appendChild(lblYes);

 

            /*add space between two radio buttons*/

            var space = document.createElement("span");

            space.setAttribute("innerHTML", "&nbsp;&nbsp");

            containerDiv.appendChild(space);

 

            var radioNo = document.createElement("input");

            radioNo.setAttribute("type", "radio");

            radioNo.setAttribute("id", "radioNo" + count);

            radioNo.setAttribute("name", "Boolean" + count);

 

            var lblNo = document.createElement("label");

            lblNo.innerHTML =  "No";

            containerDiv.appendChild(radioNo);

            containerDiv.appendChild(lblNo); 

            /*add new line for new pair of radio buttons*/

            var spaceBr= document.createElement("br");

            containerDiv.appendChild(spaceBr);

 

            count++;

            return false;

        }

    </script>

</head>

<body>

    <form id="form1" runat="server">

    <div>

    <asp:Button ID="btnCreate" runat="server" Text="Click Me" OnClientClick="return dynamicRadioButton();" />

    <div id="containerDiv" runat="server"></div>

    </div>

    </form>

</body>

</html> 


OUTPUT:

Radio Button.PNG


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