When I run my ASP.NET webforms project, my browser is unable to load the default page, and displays the following error:

Debug output

The program '[14356] iisexpress.exe' has exited with code 0 (0x0).

When I clean my solution and run and it displays

This site can't be reached

"localhost" refused to connect.

Try:

• Checking the connection
• Checking the proxy and the firewall

ERR_CONNECTION_REFUSED

Code:

<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication4._Default" %>

<asp:Content ID="BodyContent" ContentPlaceHolderID="MainContent" runat="server">

    <main>
        <section class="row" aria-labelledby="aspnetTitle">
            <h1 id="aspnetTitle">ASP.NET</h1>
            <p class="lead">ASP.NET is a free web framework for building great Web sites and Web applications using HTML, CSS, and JavaScript.</p>
            <p><a href="; class="btn btn-primary btn-md">Learn more &raquo;</a></p>
        </section>

        <div class="row">
            <section class="col-md-4" aria-labelledby="gettingStartedTitle">
                <h2 id="gettingStartedTitle">Getting started</h2>
                <p>
                    ASP.NET Web Forms lets you build dynamic websites using a familiar drag-and-drop, event-driven model.
                A design surface and hundreds of controls and components let you rapidly build sophisticated, powerful UI-driven sites with data access.
                </p>
                <p>
                    <a class="btn btn-default" href="/?LinkId=301948">Learn more &raquo;</a>
                </p>
            </section>
            <section class="col-md-4" aria-labelledby="librariesTitle">
                <h2 id="librariesTitle">Get more libraries</h2>
                <p>
                    NuGet is a free Visual Studio extension that makes it easy to add, remove, and update libraries and tools in Visual Studio projects.
                </p>
                <p>
                    <a class="btn btn-default" href="/?LinkId=301949">Learn more &raquo;</a>
                </p>
            </section>
            <section class="col-md-4" aria-labelledby="hostingTitle">
                <h2 id="hostingTitle">Web Hosting</h2>
                <p>
                    You can easily find a web hosting company that offers the right mix of features and price for your applications.
                </p>
                <p>
                    <a class="btn btn-default" href="/?LinkId=301950">Learn more &raquo;</a>
                </p>
            </section>
        </div>
    </main>

</asp:Content>

When I run my ASP.NET webforms project, my browser is unable to load the default page, and displays the following error:

Debug output

The program '[14356] iisexpress.exe' has exited with code 0 (0x0).

When I clean my solution and run and it displays

This site can't be reached

"localhost" refused to connect.

Try:

• Checking the connection
• Checking the proxy and the firewall

ERR_CONNECTION_REFUSED

Code:

<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication4._Default" %>

<asp:Content ID="BodyContent" ContentPlaceHolderID="MainContent" runat="server">

    <main>
        <section class="row" aria-labelledby="aspnetTitle">
            <h1 id="aspnetTitle">ASP.NET</h1>
            <p class="lead">ASP.NET is a free web framework for building great Web sites and Web applications using HTML, CSS, and JavaScript.</p>
            <p><a href="http://www.asp.net" class="btn btn-primary btn-md">Learn more &raquo;</a></p>
        </section>

        <div class="row">
            <section class="col-md-4" aria-labelledby="gettingStartedTitle">
                <h2 id="gettingStartedTitle">Getting started</h2>
                <p>
                    ASP.NET Web Forms lets you build dynamic websites using a familiar drag-and-drop, event-driven model.
                A design surface and hundreds of controls and components let you rapidly build sophisticated, powerful UI-driven sites with data access.
                </p>
                <p>
                    <a class="btn btn-default" href="https://go.microsoft.com/fwlink/?LinkId=301948">Learn more &raquo;</a>
                </p>
            </section>
            <section class="col-md-4" aria-labelledby="librariesTitle">
                <h2 id="librariesTitle">Get more libraries</h2>
                <p>
                    NuGet is a free Visual Studio extension that makes it easy to add, remove, and update libraries and tools in Visual Studio projects.
                </p>
                <p>
                    <a class="btn btn-default" href="https://go.microsoft.com/fwlink/?LinkId=301949">Learn more &raquo;</a>
                </p>
            </section>
            <section class="col-md-4" aria-labelledby="hostingTitle">
                <h2 id="hostingTitle">Web Hosting</h2>
                <p>
                    You can easily find a web hosting company that offers the right mix of features and price for your applications.
                </p>
                <p>
                    <a class="btn btn-default" href="https://go.microsoft.com/fwlink/?LinkId=301950">Learn more &raquo;</a>
                </p>
            </section>
        </div>
    </main>

</asp:Content>

• asp.net
• visual-studio
• localhost
• asp.net-webpages

1 Answer 1

Assuming you just hitting F5 to run the newly created project?

Go Project->"your project name" properties.

This one:

Then on Web section, try hitting the Create Virtual Directory.

This:

And hitting the Create Virtual Directory, then you should see this:

And do take a quick look over the other settings in Web. They should look like above.

At this point, you should be able to hit F5 to launch + run the site.

If you can't, then try launching VS with run as administrator, try the above steps again, and then try F5.

If running as admin does not work, then I suggest a repair or updating Visual Studio, as it will as a general rule install + setup IIS (Express) for you, and it's possible during the install of VS, you didn't select all the correct workflows for a WebForms project. And, while it sounds lame, I would consider a re-boot of your computer before doing any of the above.