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POLinkButton doesn't Postback on first click in asp.net?
 

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  1. POLinkButton doesn't Postback on first click in asp.net?
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    <p>I have a <code>.aspx</code> Webpage with a <code>UserControl</code> added on it.In <code>UserControl</code> when the <code>LinkButton</code> is <code>clicked</code> it do not <code>Postback</code> on first attempt. but when we <code>click</code> again it does the <code>Postback</code> and then only the page redirects don't know why?</p> <p>Any idea?</p> <p><strong>In .ASPX Markup:</strong></p> <pre><code> &lt;asp:LinkButton ID="lnkCheckOut" runat="server" CssClass="button orange" onclick="lnkCheckOut_Click"&gt;Checkout&lt;/asp:LinkButton&gt; </code></pre> <p><strong>In.cs file:</strong></p> <pre><code>protected void lnkCheckOut_Click(object sender, EventArgs e) { if (Session["UserID"] != null) { lnkCheckOut.PostBackUrl = "~/checkout.aspx?type=checkout"; //Response.Redirect("~/checkout.aspx?type=checkout"); Session["IsQuoteAdded"] = "false"; } //if not logged in user else { lnkCheckOut.PostBackUrl = "~/login.aspx?returnUrl="+HttpUtility.UrlEncode(Request.RawUrl); } } </code></pre> <p>When i see markup in browser(using F12 in Chrome) on <strong>first click</strong> it shows:</p> <pre><code>&lt;a id="ctl00_ContentPlaceHolder1_shpCart_lnkCheckOut" class="button orange" href="javascript:__doPostBack('ctl00$ContentPlaceHolder1$shpCart$lnkCheckOut','')"&gt;Checkout&lt;/a&gt; </code></pre> <p><strong>On Second Click:</strong></p> <pre><code>&lt;a id="ctl00_ContentPlaceHolder1_shpCart_lnkCheckOut" class="button orange" href='javascript:WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions("ctl00$ContentPlaceHolder1$shpCart$lnkCheckOut", "", false, "", "login.aspx?returnUrl=%2fNew%2fMyBox.aspx", false, true))'&gt;Checkout&lt;/a&gt; </code></pre> <p><strong>Note:I am not using any UpdatePanel in the Webpage or UserControl.</strong></p> <p>Help Appreciated!</p>
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    1. USSHEKHAR SHETE
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    1. COI can't be sure why it's happening,but an alternate way to this can be that you use __doPostback function in the onclick event of link button in javascript.
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      1. POLinkButton doesn't Postback on first click in asp.net?
      1. USNeelam
    2. COHi Neelam, but what about the session validation?
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      1. POLinkButton doesn't Postback on first click in asp.net?
      1. USSHEKHAR SHETE
    3. COi had this kind of problem way back and this is the solution i used in the end when i couldn't find anything else.you will also need to add EnableEventValidation = false in your .aspx page.I'm not sure about the session validation.You should look to solve this,keep my suggestion as the last resort.
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      1. POLinkButton doesn't Postback on first click in asp.net?
      1. USNeelam
 

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