In Windows Phone 8, I keep getting a System.WIndow

问题:

The error message I get is

A first chance exception of type 'System.Windows.Markup.XamlParseException' occurred in System.Windows.ni.dll

The call stack traces back to this snippet of code.

 public MainPage()
        {
            **InitializeComponent();**
            this.Init();

            // Set the data context of the listbox control to the sample data
            DataContext = App.ViewModel;
            this.Loaded += new RoutedEventHandler(MainPage_Loaded);


        }

And errors on the InitializeComponent() line.

public void InitializeComponent() {
        if (_contentLoaded) {
            return;
        }
        _contentLoaded = true;
        System.Windows.Application.LoadComponent(this, new System.Uri("/App;component/MainPage.xaml", System.UriKind.Relative));
        this.LayoutRoot = ((System.Windows.Controls.Grid)(this.FindName("LayoutRoot")));
        this.SSIDTextBox = ((System.Windows.Controls.TextBox)(this.FindName("SSIDTextBox")));
        this.PasswordTextBox = ((System.Windows.Controls.TextBox)(this.FindName("PasswordTextBox")));
        this.Auth_ListPicker = ((Microsoft.Phone.Controls.ListPicker)(this.FindName("Auth_ListPicker")));
        this.SaveButton = ((System.Windows.Controls.Button)(this.FindName("SaveButton")));
        this.GenerateButton = ((System.Windows.Controls.Button)(this.FindName("GenerateButton")));
        this.QRImage = ((System.Windows.Controls.Image)(this.FindName("QRImage")));
        this.Profiles= ((System.Windows.Controls.ListBox)(this.FindName("Profiles")));
    }
}

I did not get this exception before I converted the WP 7.1 to WP8.

Any help would be appreciated.

Update: I added the entire exception message, does it help pinpoint the issue?

'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: DefaultDomain): Loaded 'C:\windows\system32\mscorlib.ni.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\windows\system32\System.Windows.RuntimeHost.ni.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\windows\system32\System.Windows.ni.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\windows\system32\System.Net.ni.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\windows\system32\System.ni.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\windows\system32\System.Xml.ni.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\Data\Programs{64003C1B-A4FD-41FF-A132-2B6C9FE8EDC9}\Install\WifiQR.DLL'. Symbols loaded. 'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\windows\system32\Microsoft.Phone.ni.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\windows\system32\Microsoft.Phone.Interop.ni.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\Data\Programs{64003C1B-A4FD-41FF-A132-2B6C9FE8EDC9}\Install\Microsoft.Phone.Controls.Toolkit.DLL'. Cannot find or open the PDB file. 'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\Data\Programs{64003C1B-A4FD-41FF-A132-2B6C9FE8EDC9}\Install\microsoft.phone.controls.DLL'. Cannot find or open the PDB file. 'TaskHost.exe' (CLR C:\windows\system32\coreclr.dll: Silverlight AppDomain): Loaded 'C:\windows\system32\System.Core.ni.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. A first chance exception of type 'System.Windows.Markup.XamlParseException' occurred in System.Windows.ni.dll

回答1:

Just add the permission in your manifest file.

1. Go to WMAppmanifest.xml
2. Select the "Capabalities" tab
3. Now check "ID_CAP_MAP"

回答2:

Found the issue! I was able to find more information regarding the exception by:

1. Debug->Exceptions
2. Press Add and type in, "System.Windows.Markup.XamlParseException" and select Common Language Runtime Exceptions
3. Run again and it will pinpoint the exact line number causing the exception.

It turned out to be a simple typo.

回答3:

I had a similar problem to this and found that re-adding the click events fixed it.

It occurred when I copied the xaml from another xaml page.

回答4:

Strg+Alt+F7 of the Application in VS Express helped after WP8-Update.