473,387 Members | 1,326 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,387 software developers and data experts.

Can't cancel keyup event.

I think I'm losing my mind, granted it is kind of late here so...

I'm trying to do some simple validation on the client as keys are
pressed. The validation routine works well enough however I can't
seem to cancel the event should the validation fail. Well more
accurately, I can't cancel the keyup event. When I hook the following
routine to the keydown event it works well and an invalidation cancels
the event. I'm hooking the validation routine to the keyup event
because I need the value of the input with the current key.

function validateDecimalValue()
{
var e = window.event;
var errorMsg = "";
var keyCode = e.keyCode;

if (e.srcElement.value != "" && e.srcElement.value != "-" && !
isValidDecimal(e.srcElement.value,9,2))
{
errorMsg = "INVALID INPUT: Decmial values must lie within the
following range: -9,999,999.99 -9,999,999.99";
}

displayErrorMessage(errorMsg);

if (errorMsg != "")
{
e.returnValue = false;
e.cancelBubble = true;
}

return (errorMsg == "");
}
As I mentioned above, the validation piece works fine I just can't get
it to cancel the event if the validation fails - and I ONLY experience
this behavior (or lack thereof) with the keyup event.

Am I missing something trivial?

Thanks,
Stephan

Apr 26 '07 #1
1 6165
Frank O'Hara wrote:
As I mentioned above, the validation piece works fine I just can't get
it to cancel the event if the validation fails - and I ONLY experience
this behavior (or lack thereof) with the keyup event.

Am I missing something trivial?
Not really, keyup is not cancellable, see
<http://msdn2.microsoft.com/en-us/library/ms536940.aspx>
which says
"Cancels No"

--

Martin Honnen
http://JavaScript.FAQTs.com/
Apr 26 '07 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

3
by: CJack | last post by:
hy, I have an mdi application, i create a child form and I want to know when a button is pressed while that child form is loaded. I have this code: private void frmTestBaby_KeyUp(object...
0
by: Gene Hubert | last post by:
I'm trying to catch the KeyUp event in textbox of a DataGrid. I'm picking up the keydown and keypress events ok, but not keyup. Can anyone see what is wrong with this code. I been fighting with...
15
by: Adam J. Schaff | last post by:
I have noticed that if a user closes a form via pressing return (either while the OK button has focus or if AcceptButton is set to OK for the form) then the "ENTER" keypress event fires ON THE...
8
by: EdB | last post by:
I am testing in a TextBox KeyPress event to validate characters in the TextBox. How do I tell it to abort appending my "e" if I deem the character invalid. I note that on a Form Closing event, e...
2
by: Adam J. Schaff | last post by:
I have recently noticed an unwanted behavior that I do not know how to get rid of. To Recreate Problem: Windows Forms App with 2 forms. Form 1 has nothing on it and this code underneath: ...
4
by: **Developer** | last post by:
I have a usercontrol that contains the following. To my surprise the form containing this control get KeyUp events. Help says that for KeyPress setting e.Handled = True suppresses KeyPress...
21
by: Darin | last post by:
I have a form w/ a textbox and Cancel button on it. I have a routine to handle textbox.validating, and I have the form setup so the Cancel button is the Cancel button. WHen the user clicks on...
11
by: Ben | last post by:
Hello, I'm trying to catch the pressing of the left and right arrow keys through the KeyUp event, like so: public Form1() { InitializeComponent(); Form1.ActiveForm.KeyUp += new...
1
by: jayturley | last post by:
I have a web page with the following items on it: <label for="commissionschedule"> Commission Schedule<br /> <span id="charCounter">1000 characters or less</span> </label> <textarea...
0
by: taylorcarr | last post by:
A Canon printer is a smart device known for being advanced, efficient, and reliable. It is designed for home, office, and hybrid workspace use and can also be used for a variety of purposes. However,...
0
by: ryjfgjl | last post by:
If we have dozens or hundreds of excel to import into the database, if we use the excel import function provided by database editors such as navicat, it will be extremely tedious and time-consuming...
0
by: ryjfgjl | last post by:
In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...
0
BarryA
by: BarryA | last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
1
by: Sonnysonu | last post by:
This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...
0
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...
0
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...
0
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...
0
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.