ASP.NET: How to Leverage UpdatePanel with OnLoad Event

I am attempting to run some javascript code during the OnLoad event of my UpdatePanel like this:

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

However, I am receiving an error saying "'javascript' is not a member of ASP.reasons_aspx".

I also tried

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

Unfortunately, I am unable to access the 'Attributes' property of an UpdatePanel in the VB code-behind.

Is there another way to achieve this?

Thanks,

Jason

javascriptasp.netvb.netupdatepanelonload

Answer №1

To simplify the process, you can simply register a clientscript:

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

edit: Revised based on Tim's suggestion. I mistakenly referred to the incorrect class

Answer №2

From my understanding, there is no client-side OnLoad event for an updatepanel since it is typically rendered as a div or span. The event is triggered server-side, and it's important to note that it will occur every time the panel is updated. Have you considered resetting your buttons on the server side instead?

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