UpperCase textbox

Posted on 2009-02-08
Medium Priority
Last Modified: 2013-12-14
I need all the text fields (textbox) from my form to be filled with text in uppercase, but not found any property on textbox component to do that, you can help me?

I use textbox on ASP.NET webpage.
Question by:fsouzabrasil
LVL 25

Expert Comment

ID: 23584313
Use the UCASE() function!

Author Comment

ID: 23584401
yes, on code i use textbox.toUpper(), but when user write on textbox i need display uppercase chars.

LVL 70

Expert Comment

by:Éric Moreau
ID: 23584405
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LVL 25

Expert Comment

ID: 23584422
An alternative is to use the Change event for the control to convert the contents by using <control>.toUpper()
LVL 16

Accepted Solution

sunithnair earned 375 total points
ID: 23584433
You can add attributes to the textbox to do this using javascript
txtBox.Attributes.Add("onkeyup", "this.value=this.value.toUpperCase();");
txtBox.Attributes.Add("onblur", "this.value=this.value.toUpperCase();");
or you can do it in code behind
string text = txtBox.Text.toUpper();

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LVL 27

Expert Comment

ID: 23584449
CSS's the way to go:

<asp:TextBox ID="testBox" runat="server" CssClass="uCase" />
    text-transform: uppercase;

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