In “System. Windows. StaticResourceExtension” provide caused abnormal values

As needed, a converter is written and referenced on the form, resulting in this error. It’s fine at compile time, but not at run time.

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Could it be that the converter has written wrong? Breakpoint debugging finds that the converter code has not been run at all. On closer inspection, the system reports a XAML interpretation error, which is purely a problem here on the page.

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The page code looks like this:

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<Window
    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:cvt="clr-namespace:Converters"
    IsEnabled="{Binding HasShowedUser,Converter={StaticResource cvtBool},Mode=OneWay}">

    <Window.Resources>
        <cvt:GenericTypeConverter x:Key="cvtBool"/>
    </Window.Resources>

    <Grid>
        <Button x:Name="btnShowUser" Content="Show it off." Height="50" Width="100" Click="btnShow_Click"  />
    </Grid>

</Window>
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Searching and searching, desolate and sad, not to ride a hundred tear sister.

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Later will

IsEnabled="{Binding HasShowedUser,Converter={StaticResource cvtBool},Mode=OneWay}">
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This line moves from <Window> to <Button>, and everything works fine.

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This indicates that the previous error was due to the resource declaration after, and my call before, so the error was reported.

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How to do? Can’t <Window> be used?

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The solution is to put the resource declaration in a separate XAML file, such as staticreSources.xaml, and then include this staticresources.xaml in app.xaml, and then you can use these resources on your form.

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StaticResources.xaml

<ResourceDictionary 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:cvt="clr-namespace:Converters"
    >

    <cnvtrs:GenericTypeConverter x:Key="cvtBool" />

</ResourceDictionary>
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app.xaml

<Application 
    x:Class="My.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    StartupUri="TestWindow.xaml">

    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
		<ResourceDictionary Source="Styles.xaml"/>
                <ResourceDictionary Source="StaticResources.xaml"/>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>
</Application>
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Call the form

<Window
    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" 
    IsEnabled="{Binding HasShowedUser,Converter={StaticResource cvtBool},Mode=OneWay}">

    <Grid>
        <Button x:Name="btnShowUser" Content="Show it off." Height="50" Width="100" Click="btnShow_Click"  />
    </Grid>

</Window>
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