如何摆脱xaml WP8.1中的命名空间错误

Question

I'm working on a Windows Phone 8.1 projet and i'm currently having issues using my BooleanToVisibility Converter.

Here is the Converter itself:

public class BooleanToVisibilityConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, string language)
    {
        if (!(value is bool))
            return Visibility.Collapsed;
        bool objValue = (bool)value;
        if (objValue)
        {
            return Visibility.Visible;
        }
        return Visibility.Collapsed;

    }
    public object ConvertBack(object value, Type targetType, object parameter, string language)
    {
        throw new NotImplementedException();
    }
}

Here is my Xaml:

<Page
x:Class="CityBox.MainPage"
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"
xmlns:views="using:CityBox.Views"
xmlns:converters="using:CityBox.Converters"
mc:Ignorable="d"
Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"
DataContext="{Binding Main, Source={StaticResource Locator}}"
x:Name="MyMainPage">

<Page.Resources>
    <converters:BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"/>
</Page.Resources>


<Grid>
    <views:DataLoadingView x:Name="DataLoadingView" 
                           Visibility="{Binding LoadingViewVisibility, Converter={StaticResource BooleanToVisibilityConverter}}"/>
    <views:DrawerView  x:Name="DrawerView"  
                       Visibility="{Binding DrawerViewVisibility, Converter={StaticResource BooleanToVisibilityConverter}}" />
</Grid>
</Page>

And finaly my booleans from my ViewModel:

private bool _loadingViewVisibility;
    private bool _drawerViewVisibility;

    public bool LoadingViewVisibility
    {
        get { return _loadingViewVisibility;}
        set
        {
            _loadingViewVisibility = value;
            RaisePropertyChanged("LoadingViewVisibility");
        }
    }
    public bool DrawerViewVisibility
    {
        get { return _drawerViewVisibility; }
        set
        {
            _drawerViewVisibility = value;
            RaisePropertyChanged("DrawerViewVisibility");
        }
    }

One thing that i don't understand and i think the problem might come from is that in the Resource (in the xaml), i have some kind of warning telling me that "BooleanToVisibilityConverter" is not in the specified namespace which is weird because it was automatically added by resharper. I thought it was just an error from VS like it happends sometimes but it doesn't work when i change the values of my bools.

Hope i was precise enough for you to help me! thanks in advance, Guillaume.

EDIT : I just ran some tests and here is something interesting:

    <Grid>
    <!--<TextBlock Text="Test1" Visibility="{Binding Test2, Converter={StaticResource BooleanToVisibilityConverter}}"/>
    <TextBlock Text="Test2" Visibility="{Binding Test1, Converter={StaticResource BooleanToVisibilityConverter}}"/>-->
    <views:LoadingView Visibility="{Binding Test2, Converter={StaticResource BooleanToVisibilityConverter}}"/>
        <views:DrawerView Visibility="{Binding Test1, Converter={StaticResource BooleanToVisibilityConverter}}"/>
</Grid>

If i uncomment the two textblocks and comment my two views then it works. If i do it th other way arounds, it doesnt. in each of those views in simple put a Textblock saying "Loading" and "Drawer". in the case where i uncomment the two views and try to hide one by setting a bool to false, those two views are visible on the screen. Which doesn't happen if i do it with the two textboxes !!

Answer 1

Change your xml to:

<Page
x:Class="CityBox.MainPage"
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"
xmlns:views="using:CityBox.Views"
mc:Ignorable="d"
Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"
DataContext="{Binding Main, Source={StaticResource Locator}}"
x:Name="MyMainPage">

<Page.Resources>
<BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"/>
</Page.Resources>

<Grid>
<views:DataLoadingView x:Name="DataLoadingView" 
                       Visibility="{Binding LoadingViewVisibility, Converter={StaticResource BooleanToVisibilityConverter}}"/>
<views:DrawerView  x:Name="DrawerView"  
                   Visibility="{Binding DrawerViewVisibility, Converter={StaticResource BooleanToVisibilityConverter}}" />