---
title: "Ajax Toolkit RoundedCornersExtender Control in ASP.Net"  
description: "The RoundedCorners extender applies rounded corners to existing elements.  RoundedCorners Properties: TargetControlID - The ID of the button or link f"  
author: "John Smith"  
published: 2010-12-04  
updated: 2020-03-04  
canonical: https://www.mindstick.com/articles/279/ajax-toolkit-roundedcornersextender-control-in-asp-dot-net  
category: "ajax"  
tags: ["ajax"]  
reading_time: 1 minute  

---

# Ajax Toolkit RoundedCornersExtender Control in ASP.Net

The RoundedCorners extender applies rounded corners to existing elements.\

**RoundedCorners [Properties](https://yourviews.mindstick.com/view/81845/now-it-s-possible-to-predict-properties-of-any-molecule):**

· **TargetControlID** - The ID of the [button](https://www.mindstick.com/articles/63/how-to-add-button-in-datagridview-in-csharp-dot-net) or [link](https://www.mindstick.com/articles/23633/link-builder) for this extender to operate on

· **[Radius](https://www.mindstick.com/blog/405/curve-corners-with-shadow-in-html-using-css3)** - The radius of the corners (and height of the added area).

· **Corners** - The corners of the [target](https://yourviews.mindstick.com/view/81207/small-industries-should-be-the-target-of-economic-relief-package) [control](https://yourviews.mindstick.com/view/83439/bipartisan-gun-control-bill-passed-in-us-after-decades) that will be rounded (can be None, TopLeft, TopRight, BottomRight, BottomLeft, Top, [Right](https://www.mindstick.com/articles/23257/how-to-find-the-right-design-agency-for-your-logo-design), Bottom, [Left](https://www.mindstick.com/articles/12768/don-t-be-left-behind-with-the-new-it-revolution), or All)

**[Code](https://yourviews.mindstick.com/view/85458/alan-turing-the-mastermind-behind-cracking-the-enigma-code-during-world-war-ii):**

```
 <%-- ScriptManager control manages client script for AJAX enabled ASP.NET pages.This enables partial-page rendering and Web-service calls.You have to used this if you want to use ajax control toolkit--%><asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager> <%--Add the RoundedCorners Extender and set the  --%>  <cc1:RoundedCornersExtender ID="RoundedCornersExtender1" runat="server" TargetControlID="RadioButtonList1" Radius="20" Corners="Bottom"></cc1:RoundedCornersExtender>  <br/><br/><asp:RadioButtonList ID="RadioButtonList1" runat="server"BackColor="#3399FF"> <asp:ListItem>c#</asp:ListItem> <asp:ListItem>j#</asp:ListItem> <asp:ListItem>vb</asp:ListItem></asp:RadioButtonList>
```

**Run the [project](https://yourviews.mindstick.com/story/1788/things-to-ensure-your-construction-project-is-successful)**

Here Corners="Bottom" so bottom area will be rounded

![AjaxControl Toolkit RoundedCornersExtender Control in ASP.Net](https://www.mindstick.com/mindstickarticle/afcfadfd-cd04-4d58-9b0e-0af3f95c2534/images/757f1fb3-a1ba-4948-967b-73b245302100.png)

---

Original Source: https://www.mindstick.com/articles/279/ajax-toolkit-roundedcornersextender-control-in-asp-dot-net

Copyright © MindStick Software Pvt. Ltd. This Markdown version is provided for developers, AI systems, and offline reading.