473,390 Members | 1,398 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,390 software developers and data experts.

how to fire an event programmatically?

This is admittedly an apparently odd request... but please indulge me if you
don't mind:

Suppose I have two <asp:Button.../> on a page (Button1 and Button2). User
clicks Button1 and triggers a PostBack. How can I then fire the click event
of Button2 during the same PostBack?

I know this seems like a totally bad situation I'm creating out of naiveity.
But please indulge. It would save me from having to provide a lengthy
explanation for why I'm interested in doing this.

Please note - I want to *actually fire* the click event of Button2. It's
not enough to simply run code in some independent method that could get
called from either button's click event procedure.

Thanks!
Nov 19 '05 #1
5 10337
Button1 triggers a postback. This means the server is busy processing the
postback. Now you want to fire another click event. But it is the client who
fires onclick events. This means you need another postback to communicate
the second onclick to the server. Is this what you mean by *actually fire*
the click event of Button2? Or you want to fake another onclick on the
server side?

Eliyahu

"Verde" <VF******@BeansAndTacos.net> wrote in message
news:u9**************@TK2MSFTNGP09.phx.gbl...
This is admittedly an apparently odd request... but please indulge me if you don't mind:

Suppose I have two <asp:Button.../> on a page (Button1 and Button2). User
clicks Button1 and triggers a PostBack. How can I then fire the click event of Button2 during the same PostBack?

I know this seems like a totally bad situation I'm creating out of naiveity. But please indulge. It would save me from having to provide a lengthy
explanation for why I'm interested in doing this.

Please note - I want to *actually fire* the click event of Button2. It's
not enough to simply run code in some independent method that could get
called from either button's click event procedure.

Thanks!

Nov 19 '05 #2
just call the vent of button 2
button1_event(e,e)
{
bla bla
button2_event(null,null)
}

Nov 19 '05 #3
Verde wrote:
This is admittedly an apparently odd request... but please indulge me
if you don't mind:

Suppose I have two <asp:Button.../> on a page (Button1 and Button2).
User clicks Button1 and triggers a PostBack. How can I then fire the
click event of Button2 during the same PostBack?

I know this seems like a totally bad situation I'm creating out of
naiveity. But please indulge. It would save me from having to provide
a lengthy explanation for why I'm interested in doing this.

Please note - I want to *actually fire* the click event of Button2. It's not enough to simply run code in some independent method
that
could get called from either button's click event procedure.

Thanks!


What do you think is the difference between "actually fire" the click
event and call a method?

For C# code is generated like: Button1.Click += new ClickEventHandler(...)
You could try and add the handler for the Button2.Click also to Button1.Click
(so Button1.Click has two handlers and the Button2 handler is called by both clicks)
Do this in the Page_Load so you don't need to alter the generated code.

Hans Kesting
Nov 19 '05 #4
The short answer, as I eventually figured out is this:
tmpMyButton.RaisePostBackEvent("click");

FWIW: The reason I need to do this is that I'm using a 3rd party component
that implements its own .Click event that is NOT cancellable. Additionally,
this component does not trigger client-side control validation. My solution
is to implement a plain old <asp:ImageButton> to trigger the postback
(rather than using the 3rd party component). This gets the validation to
happen. On the server I then handle the ImageButton's click event. During
that event procedure I do more sophisticated validation and ensure that all
data required for the 3rd Party component is present. If it is, I then
programmatically instantiate the 3rd party component and fire its click
event procedure. Remember it's not cancellable - so rather than getting into
it and wishing I could cancel it if runtime conditions aren't right, I
verify the runtime conditions (in the asp:ImageButton's click event
procedrue) before even firing the 3rd party component's click event; thereby
having the same effect as cancelling it. Now, you're probably thinking this
is all fine and well but that I still don't have to fire the event (via
tmpMyButton.RaisePostBackEvent("click");) and could instead call another
method. Not true -- because the 3rd party component *always* does something
internally (i.e., I don't know how it does it) as part of its click event
procedure *after* all of my code in its [click event procedure] has run: It
POSTs data to the vendor's Web site and redirects my user to their site. If
I don't want my user to go to the vendor's site under some runtime
conditions, then I'd have to cancel the click event. But because I can't
cancel it I have to make sure it never gets fired under those conditions.
But when conditions are right I do need to ensure that my users and data get
transferred - and because the component does that as part of it's click
event I need to fire that click event (running my own code doesn't get the
user to the 3rd Party site). So, at the end of the day I get (1) client side
validation and (2) the functional equivalent of a cancellable event and (3)
leverage a 3rd party component's existing functionality to transfer
user+data -- when the component does not support the first two of these
things.

-V

"Hans Kesting" <ne***********@spamgourmet.com> wrote in message
news:Og**************@TK2MSFTNGP09.phx.gbl...
Verde wrote:
This is admittedly an apparently odd request... but please indulge me
if you don't mind:

Suppose I have two <asp:Button.../> on a page (Button1 and Button2).
User clicks Button1 and triggers a PostBack. How can I then fire the
click event of Button2 during the same PostBack?

I know this seems like a totally bad situation I'm creating out of
naiveity. But please indulge. It would save me from having to provide
a lengthy explanation for why I'm interested in doing this.

Please note - I want to *actually fire* the click event of Button2. It's
not enough to simply run code in some independent method that
could get called from either button's click event procedure.

Thanks!


What do you think is the difference between "actually fire" the click
event and call a method?

For C# code is generated like: Button1.Click += new ClickEventHandler(...)
You could try and add the handler for the Button2.Click also to
Button1.Click
(so Button1.Click has two handlers and the Button2 handler is called by
both clicks)
Do this in the Page_Load so you don't need to alter the generated code.

Hans Kesting

Nov 19 '05 #5
I want to fake another .Click on the server side.
But I figured it out... see my response to Hans.

Thanks for your interest!


"Eliyahu Goldin" <re*************@monarchmed.com> wrote in message
news:%2****************@tk2msftngp13.phx.gbl...
Button1 triggers a postback. This means the server is busy processing the
postback. Now you want to fire another click event. But it is the client
who
fires onclick events. This means you need another postback to communicate
the second onclick to the server. Is this what you mean by *actually fire*
the click event of Button2? Or you want to fake another onclick on the
server side?

Eliyahu

"Verde" <VF******@BeansAndTacos.net> wrote in message
news:u9**************@TK2MSFTNGP09.phx.gbl...
This is admittedly an apparently odd request... but please indulge me if

you
don't mind:

Suppose I have two <asp:Button.../> on a page (Button1 and Button2). User
clicks Button1 and triggers a PostBack. How can I then fire the click

event
of Button2 during the same PostBack?

I know this seems like a totally bad situation I'm creating out of

naiveity.
But please indulge. It would save me from having to provide a lengthy
explanation for why I'm interested in doing this.

Please note - I want to *actually fire* the click event of Button2. It's
not enough to simply run code in some independent method that could get
called from either button's click event procedure.

Thanks!


Nov 19 '05 #6

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

Similar topics

2
by: Kevin Ly | last post by:
Consider the test case below. The onmouseout event does NOT fire when my mouse/cusor is moved off the left side of the browser. It does if it is moved off the top, bottom, and the right side that...
2
by: Robbie | last post by:
Hi, I want to programatically fire an event. I have it working in IE, but Netscape won't work. What is the Netscape equivalent to, or a workaround for: document.myForm.myField.onchange(); ...
9
by: HJ | last post by:
Hi all, I notice that the Form_Dirty event does not fire in Access 2002 (SP-1) when the first character is typed into a new record. In previous versions of Access it does fire. For existing...
5
by: Carlo Marchesoni | last post by:
From an aspx page (A.aspx) I open another one (B.aspx - for table lookup). When the user selects an entry in B.aspx I would like to force a button's event in A.aspx to be fired. I guess the only...
2
by: Sam Miller | last post by:
Hi, I have a button event that won't fire. I left it on Friday and it worked fine. I came back in on Monday and it won't fire. I tried putting another button and just putting a...
4
by: Matt Fielder | last post by:
I have a control that the user is able to manually resize --- and it works great. The problem is I need to handle something when the control is done being resized, but not during the resize, so...
4
by: Ty Salistean | last post by:
So, here is a wierd question that we have been discussing for a bit now. Does an event fire even though nothing is subscribed to listen to the event? For instance, does the Click event of a...
19
by: Daniela Roman | last post by:
Hello, I try to fire an event under a button click event and maybe anybody can give a clue please. I have let's say a WEB grid with PageIndexChanged event: private void...
3
by: Crazy Cat | last post by:
Hi all, I am developing an asp.net 2.0 application in Visual Studio 2005. On my page I have a simple datalist that is bound programmatically to a collection of simple objects. On this page I...
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: Charles Arthur | last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
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
by: emmanuelkatto | last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud. Please let me know. Thanks! Emmanuel
1
by: nemocccc | last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
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
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
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...

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.