---
title: "Ajax Toolkit TextBoxWatermarkExtender Control in ASP.Net"
description: "TextBoxWatermark is an ASP.NET AJAX extender that can be attached to an ASP.NET TextBox control to get watermark behavior. When a watermarked TextBo"
author: "Pushpendra Singh"
published: 2010-12-03
updated: 2020-03-04
canonical: https://www.mindstick.com/articles/283/ajax-toolkit-textboxwatermarkextender-control-in-asp-dot-net
category: "ajax"
tags: ["ajax"]
reading_time: 1 minute
---
# Ajax Toolkit TextBoxWatermarkExtender Control in ASP.Net
\
TextBoxWatermark is an ASP.NET AJAX extender that can be attached to an ASP.NET TextBox control to get watermark behavior. When a watermarked TextBox is empty, it displays a message to the user. Once the user has typed some text into the TextBox, the watermarked appearance disappears.
## TextBoxWatermark Properties:
•**TargetControlID** - The ID of the TextBox to operate on
•**Watermark Text** - The text to show when the control has no value
## Code:
```
<%-- 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--%> <%--Add the TextWatermarkExtender here --%> <%--Add the one textbox here --%>
```
Add the css in head tag on aspx [page](https://yourviews.mindstick.com/view/83591/the-complete-guide-page-speed-optimisation-and-seo)
```
```
## Run the project
When you click in the text then watermark text will disappear.
---
Original Source: https://www.mindstick.com/articles/283/ajax-toolkit-textboxwatermarkextender-control-in-asp-dot-net
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