c# 不包含“InitializeComponent”的定义，名称“controlName”在当前上下文中不存在

Question

I've been developing a windows phone app in a team since June. Everything worked fine with all the syncs until today. I synced the project and vs started giving me the errors

• "WindowsPhoneApp.MainPage" does not contain a definition for InitializeComponent (and in all other pages, even App)
• The name "controlName" does not exist in the current context (this happens in all the pages)

I didn't change anything, it worked fine yesterday. Classes names on XAML match the names in code-behind.
I've tried exited all vs instances but the problems are still there.

Answer 1

For me, the problem was following:

---

Project structure

Project\Views\Page1.xaml
Project\Views\Page1.xaml.cs

The error in Page1.xaml.cs on abovementioned page constructor:

public sealed partial class Page1 : Page
{
    public Page1()
    {
        this.InitializeComponent();
    }
}

Xaml file

<Page
    x:Class="App1.Page1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

---

should be x:Class="App1.Views.Page1"

so just typo in the class name.

Answer 2

Close the solution, delete the.suo file associated with the solution, delete the "bin" and the "obj" folders in all projects. Then re-open the solution in VS and rebuild the solution.

The "suo" file is a hidden file so you may need to go in the explorer to menu / View and there check the "Hidden items" option. In VS2013 it was in the same folder as the.sln file, in newer versions it's in the (hidden).vs folder.

Answer 3

For me, the problem was app was running in background.

There was no app window or icon in the taskbar. The application instance persisted even when Visual Studio was closed , preventing me from manually clearing /bin and /obj in Solution because Windows threw 'files currently in use' exception.

Solution is to

• Kill the app using Task Manager ( CTRL + SHIFT + ESC )
• Clean the solution
• Rebuild app

Restarting the system will also work.