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I'm trying to execute some javascript code on my UpdatePanel's OnLoad event like so:

<asp:UpdatePanel ID="updDropDowns" runat="server" OnLoad="javascript:ResetButtons();">

But I keep getting "'javascript' is not a member of ASP.reasons_aspx".

I tried doing

Me.updDropDowns.Attributes.Add("OnLoad", "javascript:ResetButtons();")

But I can't reference the 'Attributes' property of an UpdatePanel in the VB code-behind.

How else can I accomplish this?

Thanks,

Jason

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  • What about removing javascript:? Commented Aug 8, 2011 at 18:45

2 Answers 2

Reset to default
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The easiest way is to register a clientscript:

ScriptManager.RegisterStartupScript(this.GetType(), "pagestart", "ResetButtons();", true)

edit: Updated per Tim's note. I referenced the wrong class

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2 Comments

In an Async Postback? @Jason should use the ScriptManagers's RegisterStartupScript method instead.
I'm pretty sure that 'registerstartupscript' just puts your code inside a pair of script tags. It's not doing anything like putting it in a $(document).ready() jQuery event.
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As far as I know, their is no client OnLoad event for an updatepanel (it's rendered as a div or a span). It's only server side. And dont forget, the event will be fired each and every time the panel gets updated. Why dont you just reset your buttons server side ?

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Problem with that is if I disable the buttons server-side, they're a bit difficult to reference later on in the client. I ended up doing something similar to David's idea. But thanks for your post!

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