Avoid postback in asp.net on button click event

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Hi,
I want to avoid postback on button click event.Here,my requirement is that, first time my page load with some initial values which are set it as from javascript.& I want to preserve these values after button click event fires.

Can you help me asap..

Thanks..

Posted 19-Jul-12 4:47am

rajendra@patil55

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bbirajdar 19-Jul-12 11:04am

Use the HTML input button

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_Zorro_ · Answer 1 · 2012-07-19T05:01:00

Hi,

If I understand what you're saying, you're loosing your values because they're not in the viewstate. You have two choices, either you do a postback and get those values from your form (the one you just posted: Request.Form[]) otherwise you can put an href and make it call a js function.

Hope it helps.

Michael Sernal · Answer 2 · 2012-07-19T05:07:00

Hi ran rajendra@patil55,

If you mean like validating a form or something here is something i would like to share, hope this helps.

in the head of your page:

JavaScript

<script type = "text/javascript">
    function validate() {

        var txt = document.getElementById("<%=Textbox1.ClientID%>").value;
        if (txt == "") {
            alert("Please enter your name in the textbox before proceeding.");
        }
        else {
            window.location = "default.aspx";
        }
    }
</script>

and in the button:

ASP.NET

<asp:button id="Button1" runat="server" text="Proceed" onclientclick="validate(); return false" xmlns:asp="#unknown" />

the return false after the function call prevents the postback.

Avoid postback in asp.net on button click event

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