Question 88763 in ASP.NET Question posted in
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ASP.NET Page_Load fires twice with different values of IsPostback

I have an asp.net web application that has been behaving strangely for some time now.
When I click any button, the Page_Load method of the various pages always enters 2 times.
The first time the IsPostback parameter has the correct value, and the second it doesn’t.

I read that applications that passes more times in Page_Load could have href or src empty but in my page I can’t find anything.

one page is https://almarea.it/login

The code of the button in aspx page is

<asp:LinkButton runat="server" ID="lnkBtnLogin" class="btn btn-default btn-lg btn-block" OnClick="lnkBtnLogin_Click" Text="LOGIN"></asp:LinkButton>

The code in the code behind is quite long but if I try to remove all that code and let it empty the problem is still there.

protected void lnkBtnLogin_Click(object sender, EventArgs e)
    {
    }

So the problem is not here.

I checked for empty src and empty href but I didn’t find anything.

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2

Answers


  1. 0

    Check your browser dev tools (the network tab) and look at what is initiating the second request.

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  2. 0

    Are you using a master + child page? In that case, both master page load, and child page load triggers.

    It also possible that your button code does a response.redirect back to the same page, which of course would also cause a double page load. The other possible is use of postback URL in the button. In that case, you don’t want to have a event stub for that button, so either remove postbackURL from the button, or remove the event stub in code behind – don’t have both.

    You could post just the button markup, and then say the button event code stub.

    The other possible is some JavaScript code that posts-back to the same page.

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