Programatically setting OnClick handler for asp:Button (how to do?)

Richard Morse

Hi! I have an aspx that I've created which has an asp:Button in it. I
would like to be able to change the OnClick handler at runtime
(basically, I want this form to either edit or create a record, and I
want to change the procedure it calls depending on what it should be
doing). However, apparently the .OnClick member is read only?

(Sample:)

<script language="jscript">
function do_edit() {
...
do_action_btn.Text = "Save";
do_action_btn.OnClick = "do_update";
}
....
</script>
<html>
<head>
</head>
<body>
<form id="page_form" runat="server" />
...
<asp:Button id="do_action_btn" runat="server" />
...
</form>
</body>
</html>

----------

Alternately, if the above isn't possible, I can do something with
CommandButtons, but without a repeater/datagrid/datalist, I'm not sure
where to put the "OnItemCommand" property...

Thanks muchly,
Ricky Morse

Nov 18 '05 #1

Subscribe Reply

2508

Matthew Trunnell

I haven't had much luck re-using buttons over multiple
post backs. There is a solution, however. You can use a
number of asp:Panels to hold sets of buttons (or whatever
you need to change between post backs). Create a Panel
holding the first "Edit" button, and a second Panel
holding the "Save" button with visibility=false. In
Edit_OnClick, set edit_panel.visibility=false and
save_panel.visibility=true. Obviously, you will need
different OnClick handlers for each button.

That's not exactly what you asked for, but it can
sometimes be a little cleaner than re-using buttons and
eventhandlers.

hth,
Matt

-----Original Message-----
Hi! I have an aspx that I've created which has an asp:Button in it. Iwould like to be able to change the OnClick handler at runtime(basically, I want this form to either edit or create a record, and Iwant to change the procedure it calls depending on what it should bedoing). However, apparently the .OnClick member is read only?
(Sample:)

<script language="jscript">
function do_edit() {
...
do_action_btn.Text = "Save";
do_action_btn.OnClick = "do_update";
}
....
</script>
<html>
<head>
</head>
<body>
<form id="page_form" runat="server" />
...
<asp:Button id="do_action_btn" runat="server" />
...
</form>
</body>
</html>

----------

Alternately, if the above isn't possible, I can do something withCommandButtons, but without a repeater/datagrid/datalist, I'm not surewhere to put the "OnItemCommand" property...

Thanks muchly,
Ricky Morse
.

Nov 18 '05 #2

bruce barker

submit/image buttons have a value they post back. just change the value in
client script, and check the value on the server side on the onclick event.
function do_edit() {
var btn = document.getElementById('do_action_btn');
...
btn.value = "Save";
}

-- bruce (sqlwork.com)
"Richard Morse" <re*****@partners.org> wrote in message
news:re***************************@plato.harvard.e du...

Hi! I have an aspx that I've created which has an asp:Button in it. I
would like to be able to change the OnClick handler at runtime
(basically, I want this form to either edit or create a record, and I
want to change the procedure it calls depending on what it should be
doing). However, apparently the .OnClick member is read only?

(Sample:)

<script language="jscript">
function do_edit() {
...
do_action_btn.Text = "Save";
do_action_btn.OnClick = "do_update";
}
...
</script>
<html>
<head>
</head>
<body>
<form id="page_form" runat="server" />
...
<asp:Button id="do_action_btn" runat="server" />
...
</form>
</body>
</html>

----------

Alternately, if the above isn't possible, I can do something with
CommandButtons, but without a repeater/datagrid/datalist, I'm not sure
where to put the "OnItemCommand" property...

Thanks muchly,
Ricky Morse

Nov 18 '05 #3

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