Typing in uppercase in a TextBox

Posted on 2004-09-06
Last Modified: 2012-06-22
Hi All,

I remember that in C++ (MFC) you could specify whether the text box is a password and if you want to use uppercase/lowercase or as typed.

I see now you can still specify the password part but there is no way of changing what is being typed to uppercase ...

Is this true or am I missing something ... if not is the only way of fixing this by using an onchange event ?

Question by:Pete2003
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
LVL 48

Expert Comment

ID: 11989565

Author Comment

ID: 11989905
Sorry wasn't specific enough .. I meant for WEB forms .. not windows forms ...

LVL 20

Expert Comment

ID: 11990082
You cannot change this for Web forms. This is not part of .Net or C# but from the HTML standards and you cannot change it :-(( You can however write some JavaScript that changes the text to upper when the user enters something in your text box
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

LVL 15

Accepted Solution

Timbo87 earned 200 total points
ID: 11990379
If you're using ASP.NET server controls, try this:

textBox1.Attributes.Add("onkeyup", "this.value = this.value.toUpperCase();");

You'll want to perform a server side check when they post the data though, in case the user has JavaScript disabled.
LVL 29

Expert Comment

by:David H.H.Lee
ID: 11990957
Try this instead (use some delay to convert the typed text into uppercase):
function convertUpperCase(keyItem)  {
     setTimeout('ConvertKey("' +keyItem+ '")', 1);
function ConvertKey(selObj)  {
     document.getElementById(selObj).value = document.getElementById(selObj).value.toUpperCase();
<asp:textbox id="txtTest" runat="server"/>

LVL 18

Expert Comment

ID: 11993690

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
how to remove duplicate code from my project 5 66
C# Get Current Exchange Rate from XE 9 42
Load XML element 3 43
Put File 6 36
Introduction This article series is supposed to shed some light on the use of IDisposable and objects that inherit from it. In essence, a more apt title for this article would be: using (IDisposable) {}. I’m just not sure how many people would ge…
This article introduced a TextBox that supports transparent background.   Introduction TextBox is the most widely used control component in GUI design. Most GUI controls do not support transparent background and more or less do not have the…
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below.…

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question