Error: The type or namespace name 'localhost' could not be found (are you missing a using directive or an assembly reference?)

Hi Experts,

I'm using visual studio 2012 and just started building my first web service. When I tried to build my website that host a simple web service, I keep getting this error :
Error1 The type or namespace name 'localhost' could not be found (are you missing a using directive or an assembly reference?) C:\Users\IT\Documents\Visual Studio 2012\WebSites\Temprature\Temprature.aspx.cs 22 9)
and the code snippet that has this error is :

sing System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Temprature : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        localhost.Convert wsConvert = new localhost.Convert();
        double temperature =
        System.Convert.ToDouble(TemperatureTextbox.Text);
        FahrenheitLabel.Text = "Fahrenheit To Celsius = " +
        wsConvert.FahrenheitToCelsius(temperature).ToString();
        CelsiusLabel.Text = "Celsius To Fahrenheit = " +
        wsConvert.CelsiusToFahrenheit(temperature).ToString();
    }
}

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So, please guide me to solve this issue.

Thanks a lot in advance.
Harreni

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LVL 76

kaufmed ( ⚆ _ ⚆ )I asked the operating system what I could do to become a better programmer. It said, "Let me give you some pointers."Commented: 2016-04-15

Click on "localhost". Next, push Ctrl and period keys. You should get a popup offering suggestions on how to fix. One of those suggestions should be to import the missing namespace. Select that option.

HarreniAuthor Commented: 2016-04-15

Thanks a lot käµfm³d for guiding and helping me.
I did what you suggest me to do and I got a long list but I don't know which one is correct.

What does the list look like? Can you screenshot it?

LVL 53

Chris StanyonWebDevCommented: 2016-04-15

When you add a Web Reference to your project, it will create the namespace based on your server name, so it will only be called localhost if that's your server name. If you have it named as anything else, then use that name instead.

Check the namespace of your reference - the file will be somewhere in the App_WebReferences folder.

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LVL 5

Steven KribbeSoftware EngineerCommented: 2016-04-15

remove the localhost. You can just use Convert

HarreniAuthor Commented: 2016-04-16

Thanks a lot käµfm³d, Chris and Steven you're all helped me.
I forgot to add "using System.Web.Services;" to my name spaces list

Error: The type or namespace name 'localhost' could not be found (are you missing a using directive or an assembly reference?)

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