AspnetO

We code, that works!

  • Home
  • Asp.net
  • MVC
  • Interview Questions
You are here: Home / Asp.net / Set Asp.net DropDownList Selected Value in JavaScript

Set Asp.net DropDownList Selected Value in JavaScript

By: Mayank Modi | Falls In: Asp.net | Last Updated: Oct 07, 2020

Now here in this tutorial, I’ll explain how to set the asp.net dropdownlist selected value text from client-side using javascript as well as jquery with sample demo and example code.

In my previous tutorials, I’d explained about how to bind data to asp.net gridview, gridview insert update delete data using parameterized query, difference between executereader executenonquery and executescalar and other more cracking tutorials on Asp.net, JavaScript, jQuery, GridView here.

 

There are many ways to set the asp.net dropdownlist selected value, here I shared my best two approaches for the same. So follow the following simple two javascript functions in two versions
.
.
you’ve choice here to pick up any one 😉 that is pure JavaScript and jQuery. You can call any function on asp.net button click event or use wherever you need!

jQuery Function To Set DropDownList Selected Value

Following is the function for jQuery that will set the selected value or text from the dropdown list:

<script type=”text/javascript” src=”http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js”>
</script>
<script type=”text/javascript”>
function setSubjectUsingJquery() {
//get dropdownlist object
var myDropDown = $(“select#ddlSubject”);
var selVal = $(“input#txtValue”).val();
if ((myDropDown.find(‘option’).length – 1) >= selVal) {
myDropDown.val(selVal);
} else {
alert(“jQuery: Index out of range!”);
}
return false;
}
</script>

JavaScript Function To Set DropDownList Selected Value

Following is the function for JavaScript that will return the selected value or text from the dropdown list:

<script type=”text/javascript”>
function setSubjectUsingJavaScript() {
//get dropdownlist object
var myDropDown = document.getElementById(“ddlSubject”);
var selVal = document.getElementById(“txtValue”).value;
if ((myDropDown.length – 1) >= selVal) {
myDropDown.selectedIndex = selVal;
} else {
alert(“JavaScript: Index out of range!”);
}
return false;
}
</script>

Using of Above Functions

For JavaScript:setSubjectUsingJavaScript();
For jQuery: setSubjectUsingJquery();
You may also like, how to get asp.net dropdownlist selected value using jquery and get asp.net dropdownlist selected value using javascript here.

HTML Markup – [.aspx]

Following is the complete HTML Markup code for .aspx page:

<html xmlns=”http://www.w3.org/1999/xhtml”>
<head id=”Head1″ runat=”server”>
<title>Set Asp.net DropDownList Selected Value Text Using JavaScript
jQuery</title>
<script type=”text/javascript” src=”http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js”>
</script>
<script type=”text/javascript”>
function setSubjectUsingJavaScript() {
//get dropdownlist object
var myDropDown = document.getElementById(“ddlSubject”);
var selVal = document.getElementById(“txtValue”).value;
if ((myDropDown.length – 1) >= selVal) {
myDropDown.selectedIndex = selVal;
} else {
alert(“JavaScript: Index out of range!”);
}
return false;
}

function setSubjectUsingJquery() {
//get dropdownlist object
var myDropDown = $(“select#ddlSubject”);
var selVal = $(“input#txtValue”).val();
if ((myDropDown.find(‘option’).length – 1) >= selVal) {
myDropDown.val(selVal);
} else {
alert(“jQuery: Index out of range!”);
}
return false;
}
</script>
</head>
<body>
<form id=”form1″ runat=”server”>
<div>
<table>
<tr>
<td>Select any Subject</td>
<td>:</td>
<td>
<asp:DropDownList ID=”ddlSubject” runat=”server” ClientIDMode=”Static”>
<asp:ListItem Value=”0″ Text=”Please select” />
<asp:ListItem Value=”1″ Text=”HTML” />
<asp:ListItem Value=”2″ Text=”CSS” />
<asp:ListItem Value=”3″ Text=”JavaScript” />
<asp:ListItem Value=”4″ Text=”jQuery” />
<asp:ListItem Value=”5″ Text=”Asp.net” />
<asp:ListItem Value=”6″ Text=”PHP” />
<asp:ListItem Value=”7″ Text=”Android” />
</asp:DropDownList>
</td>
</tr>
<tr>
<td colspan=”3″>&nbsp;&nbsp;</td>
</tr>
<tr>
<td>Select Using</td>
<td>:</td>
<td>
<asp:TextBox ID=”txtValue” runat=”server” ClientIDMode=”Static”
placeholder=”Index between 0 to 7″ />&nbsp;&nbsp;
<asp:Button ID=”btnUsingJavaScript” runat=”server” Text=”Use JavaScript”
OnClientClick=”setSubjectUsingJavaScript(); return false;” />&nbsp;&nbsp;
<asp:Button ID=”btnUsingJquery” runat=”server” Text=”Use jQuery”
OnClientClick=”setSubjectUsingJquery(); return false;” />
</td>
</tr>
</table>
</div>
</form>
</body>
</html>

As you can see from the above example, I’ve created separate functions, that is setSubjectUsingJavaScript() for JavaScript and setSubjectUsingJquery() for jQuery and then called it on button click event as OnClientClick=”setSubjectUsingJavaScript(); return false;” for JavaScript and OnClientClick=”setSubjectUsingJavaScript(); return false;” for jQuery.

Note: Here, I’ve added return false; to prevent server-side postbacks. Also added some validation in above functions which will check for error array index out of range.

Signup Today And Get Latest Tutorials For Free!

Subscribe to us and get free latest tutorials notifications whenever we publish a new contents.

<

About Mayank Modi

Mayank is a web developer and designer who specializes in back-end as well as front-end development. He's a Founder & Chief Editor of AspnetO. If you'd like to connect with him, follow him on Twitter as @immayankmodi.

Leave a Reply Cancel reply

Search Your Topic



Social Connections

  • 1,438 Fans
  • 3,095 Followers
  • 51 Followers
  • 1,559 Subscribers

Get Latest Tutorials For Free



Top Posts

  • Asp.net Menu Control Example
  • CSS3 Transition: fadeIn and fadeOut like Effects to Hide Show Elements
  • Show Confirm Message Box from Code-behind in Asp.net
  • Pass Multiple Parameters in Asp.net QueryString Example
  • Get Selected Text Value from DropDownList in Asp.net using JavaScript

Contribute to AspnetO

If you want to contribute your unique blog articles or tutorials (Free / Paid) to AspnetO in any languages, you're most welcome. Just send me your previous articles, and topics on which you are interested to post an tutorial. Contact us at email listed in contact us page. Selected candidates will be contacted.

Search by Tags

Ado.net Ajax appSettings Asp.net C# CheckBox CheckBoxList ConnectionStrings Control CSS CSS3 Difference Download DropDownList Export Facebook fadeIn fadeOut fadeTo fadeToggle File File Extension FileUpload Function GridView IIS Interview Questions JavaScript jQuery MVC OOP RadioButtonList RDP Repeater Send Mail Solutions Split SQL Stored Procedure TextBox Upload Validation VB Web.config Web Hosting

The Man Behind AspnetO

Mayank Modi

Hi there,

Myself Mayank Modi, a Full Stack Developer (.NET Stack) and a blogger from Surat, India.

I'm welcoming you to my blog - AspnetO, a programmers community blog where we code, that works!

I started AspnetO as a hobby and now we're growing day by day. We're now having 5000+ programmers that get benefits and learn new things about website design and development under our community blog.

Here at AspnetO, I write about Beginners to Advance level of tutorials on programming languages like Asp.net using C# and Vb.net, MVC, SQL Server, JavaScript, jQuery etc. In sort, all about .NET Framework and website development stuff and sometimes sharing tips and tricks that can help you to grow up your programming skills.

You can get more details about me and my blog at About us page.

Subscribe To Newsletter

Enter your email address to subscribe to this blog and receive notifications of new posts right to your inbox

Join 1000+ other subscribers

<

Recent Posts

  • Main Difference between SessionState and ViewState in Asp.net
  • How to Get appSettings Value from Web.config File?
  • How to Get ConnectionString from Web.config in Asp.net?
  • Difference between appSettings and connectionStrings in Web.config
  • Get Folder Files List and Export to CSV in .NET
  • Get Files List From Directory Recursively in C# Vb.net
  • Get Hash Value From Current Page URL In jQuery
  • Handle Multiple Submit Buttons in Single MVC Form

Copyright © 2014 - 2021 · All Rights Reserved.

About | Copyrights | Privacy | Terms | Contact | Advertise | Sitemap
Previous Preview Image Before Uploading to Server Using jQuery
Next Disable Submit Button Once Form Is Submitted Using jQuery