!IsPostBack event from Javascript

Question

I am using ASP.NET

I have to set the value of a variable [testVar] into Javascript on page load. only for the first time when the page load. Just like !IsPostBack event on code side.

From next postback this function of Javascript should not call. Please let me know how to implement it.

Robert Koritnik · Accepted Answer · 2010-12-02 09:50:41Z

1

Add this line to your ASPX page:

<% if (!this.IsPostBack) %>
<% { %>
    <script type="text/javascript">
    document.getElementById("<%= this.timeVar.ClientID %>").value = '1/1/2010';
    </script>
<% } %>

edited Dec 2, 2010 at 9:50

answered Dec 2, 2010 at 9:34

Robert Koritnik

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5 Comments

Zerotoinfinity Over a year ago

Thanks, but I have to set the value of a hidden variable in my aspx page. Hidden variable name is "timeVar". How to set the value, please suggest

Zerotoinfinity Over a year ago

I am trying to put this between <script> tag, but no luck var TimeVar =document.getElementById('<%= this.timeVar.ClientID %>'); TimeVar.value= "1/1/2010";

Robert Koritnik Over a year ago

changed my answer a bit to include your code snippet. @zerotoinfinite

Zerotoinfinity Over a year ago

I put this code on the aspx page, I also put the alert under it. But this event is not firing . :-( please help

Robert Koritnik Over a year ago

@Zerotoinfinite: Have you checked client side HTML code with Firebug? Can you do that now?

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