Question

ASP.Net Controls and Javascript Events

Asked by: useless_eater

How do I tell an ASP.Net control to call a javascript function when an event occurs?  If I try and do it the same way as I would with a normal HTML control it tells me my javascript function is not part of my ASP page.

'helloworld()' is not a member of 'ASP.CreateEvent_aspx'.

The tag is...

<asp:RadioButton id="RadioButton1" runat="server"
OnCheckedChanged="helloworld()"></asp:RadioButton>

My helloword function gets called OK from an HTML tag, so what's differnt with ASP.Net?

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Asked On
2004-01-23 at 12:19:06ID20861063
Tags

javascript

,

oncheckedchanged

Topic

.NET

Participating Experts
2
Points
500
Comments
6

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Answers

 

by: etillotsonPosted on 2004-01-23 at 12:32:58ID: 10187498

Try


OnCheckedChanged='javascript:helloworld()'

 

by: mmarinovPosted on 2004-01-23 at 12:58:48ID: 10187703

in your code behind write
RadioButton1.Attributes.Add ("OnCheckedChanged", "javascript:helloworld()" )

HTH
B..G

 

by: useless_eaterPosted on 2004-01-24 at 04:04:15ID: 10190594

I tried mmarinov's solution, for same strange reason it's wrapping my radio button inside a <span> tag and putting the attribute there instead.  This is what is displayed when I view the source in the browser...

Note the span tab wasn't there before.

<span oncheckedchanged="javascript:helloworld();"><input id="RadioButton1" type="radio" name="RadioButton1" value="RadioButton1" /></span>

As for etillotson's solution, it just tells me 'javascript' is not a member of 'ASP.CreateEvent_aspx'.

 

by: useless_eaterPosted on 2004-01-24 at 04:25:27ID: 10190655

I've just tried mmarinov's solution with an onclick event instead and it works.  So what's so funny about an onchecked change event?

This works

RadioButton1.Attributes.Add("onclick", "javascript:helloworld();")

This doesn't work (puts the code in a <span> tag around the radiobutton)

RadioButton1.Attributes.Add("oncheckedchanged", "javascript:helloworld();")

 

by: useless_eaterPosted on 2004-01-24 at 08:31:34ID: 10191585

Hi Mmarinov,

I'm giving you the points, your solution worked, but I had to use the onClick event instead.  Not sure why I couldn't get the other event to work?

 

by: mmarinovPosted on 2004-01-24 at 12:10:38ID: 10192191

hi usesless_eater,
i've read for this event and in all msdn documentation thee was only the explanation that this event ocurs in the postback
sorry i couldn't help you directly

B..G

20120131-EE-VQP-002

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