Yes, very doable (several ways actually). Check out
RegisterClientScriptBlock.
It looks something like the following if done entirely in code behind.
You can also do this via script in the HTML. This is from production
code but I hacked out the irrelevant parts so forgive any errors.
Jon Finley
**************************
In Page_Load
Dim scriptString As String
scriptString += "<script language=""JavaScript""> "
scriptString += "function CheckRequiredInfo() "
scriptString += "{ "
scriptString += " var reqItems = ''; "
scriptString += " if (document.Form1.txtHeading.value ==
'') "
scriptString += " reqItems = reqItems + 'Heading is
required.\n'; "
scriptString += " if (document.Form1.txtLinkLabel.value ==
'') "
scriptString += " reqItems = reqItems + 'Link Label is
required.\n'; "
scriptString += " if
(document.Form1.txtPublicItemDescription.value == '') "
scriptString += " reqItems = reqItems + 'Public
Description is required.\n'; "
scriptString += " if (document.Form1.txtEffectiveDate.value
== '') "
scriptString += " reqItems = reqItems + 'EffectiveDate is
required.\n'; "
scriptString += " if (document.Form1.txtSubmittedBy.value
== '') "
scriptString += " reqItems = reqItems + 'Submitted By is
required.\n'; "
scriptString += " if (reqItems == '') "
scriptString += " return true; "
scriptString += " else {"
scriptString += " alert('The content has not been saved.
The following errors were found: \n' + reqItems); "
scriptString += " return false;} "
scriptString += "} "
scriptString += "</script>"
'-- Register script block on page
If (Not IsClientScriptBlockRegistered("clientScript")) Then
RegisterClientScriptBlock("clientScript", scriptString)
End If
Me.btnSave.Attributes.Add("onClick", "if
(CheckRequiredInfo()) return true; else return false;")
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, October 15, 2002 3:14 PM
> To: dotnet
> Subject: client side event handling for server side control
>
>
> What I would like to do is when a user clicks on my
> asp:imagebutton control, have client side code catch the
> event (onmouseup, perhaps) and then have the logic of
> that handler determine whether or not to call the server
> side onclick event handler.
>
> Does anyone know how to do this?
>
> Thanks
>
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