Setter & Binding usage with XAMLMarkupExtension 2.0

[konne]

update Docu:

<TextBlock Name="MyLabel3" FontSize="20" HorizontalAlignment="Center">
    <TextBlock.Text>
        <MultiBinding Converter="{lex:StringFormatConverter}" >
            <Binding Source="{lex:Loc HelloWorldWPF:Ressourcen:MyLabel2}" />
            <Binding Path="Hours" FallbackValue=""/>
        </MultiBinding>
    </TextBlock.Text>
</TextBlock>


<CheckBox Name="CheckBox" Content="Change text" />
<TextBlock FontSize="20">
    <TextBlock.Style>
        <Style TargetType="TextBlock">
            <Setter Property="Text" Value="{Binding Source={lex:Loc en}}" />

            <Style.Triggers>
                <DataTrigger Binding="{Binding ElementName=CheckBox, Path=IsChecked}" Value="True">
                    <Setter Property="Text" Value="{Binding Source={lex:Loc de}}" />
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </TextBlock.Style>
</TextBlock>

[fernandreu]

Hi, I just saw this issue and I was wondering: should the first case still work if the LocExtension uses a binding? Something like:

<Binding Source="{lex:Loc {Binding MyProperty}}" />

I tried it but it seems to give me an empty string instead. My use case is also slightly different because I want the binding for one of the arguments, not the string format, but I guess they are probably handled in the same way.

Otherwise, is there a recommended way of achieving that? I could only find a workaround by using a dummy, collapsed framework element (it could be an FELoc), setting the binding for one of the properties there, then define the binding as normally:

<Binding ElementName="TheDummyElement" Path="ThePropertyOfTheDummyElementWithTheBinding" />

Other than this, great library so far!

[konne]

Hi, good question. I will test this, but the issue here might be that Binding is a MarkupExtension and not a DependencyObject. It can be that the necessary changes are still not in the pre / release.

Normally this Binding inside a MarkupExtension is not possible, but karnah and I found together
a cool workaround to make this possible, but this is not working in all cases.

[NiklasMoller]

Following the example above, I'm trying to change the value of a Setter:

<DataTrigger Binding="{Binding XPath=configurations/PatientType}" Value="PMI"> <Setter x:Name="LoginPageTitlePMI" Property="Text" Value="{Binding Source={lex:Loc en}}"/> </DataTrigger>

This displays "Key: en" and not the correct string. Also, I would like to be able to set any language (as in Text="{lex:Loc}")

@konne Could you provide any help?

[Karnah]

@NiklasMoller, hi!
It's a assumption. but looks like your case. There is a problem with using Loc inside Binding. Extension cannot access to LocalizationProvider which connected with UI element. So you need to set provider using LocalizeDictionary.Instance.DefaultProvider.

[NiklasMoller]

@Karnah Thanks! Could you provide an example in code of what you describe?

[Karnah]

@NiklasMoller, hmm, I've checked your case again. It should be enough to set this lines in main window.

WPFLocalizeExtension/tests/HelloWorldWPF/MainWindow.xaml

Lines 13 to 14 in f704cdc

	lex:ResxLocalizationProvider.DefaultAssembly="HelloWorldWPF"
	lex:ResxLocalizationProvider.DefaultDictionary="Ressourcen"

I put this lines to MainWindow.xaml and it works fine:

<TextBlock FontSize="20" HorizontalAlignment="Center" Foreground="Aqua">
    <TextBlock.Style>
        <Style TargetType="TextBlock">
            <Setter Property="Text" Value="{lex:Loc en}" />

            <Style.Triggers>
                <DataTrigger Binding="{Binding Source={x:Static lex:LocalizeDictionary.Instance}, Path=Culture.TwoLetterISOLanguageName}"
                             Value="de">
                    <Setter Property="Text" Value="{Binding Source={lex:Loc de}}" />
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </TextBlock.Style>
</TextBlock>

If you have same lines, could you create a sample project?

[NiklasMoller]

@Karnah Thanks! I tried it without any luck.

I have setup an example repo here with my use case described: https://github.com/NiklasMoller/WPFLocalizationExtensionsWithSetters

Could you please help me and others struggling with this? Thanks :)

[Karnah]

@NiklasMoller, sorry, I didn't understand your problem first time.
So, problem is that autofinding keys in Binding is not working. When extension is used inside 'Binding' and Setter, it can't get information about target object. I know only one solution which can help you: specify key

<Style x:Key="SelectUserStyle" TargetType="TextBlock">
    <Style.Triggers>
        <DataTrigger Binding="{Binding XPath=configurations/PatientType}" Value="PLP">
            <Setter x:Name="LoginPageTitlePLP" Property="Text" Value="{Binding Source={lex:Loc LoginPageTitlePLP, ForceCulture='sv-SE'}}"/>
        </DataTrigger>
        <DataTrigger Binding="{Binding XPath=configurations/PatientType}" Value="SCI">
            <Setter x:Name="LoginPageTitleSCI" Property="Text" Value="{Binding Source={lex:Loc LoginPageTitleSCI, ForceCulture='sv-SE'}}"/>
        </DataTrigger>
    </Style.Triggers>
</Style>

Also you said about to be able to set any language. You meen property ForceCulture ot something else?

[NiklasMoller]

@Karnah Brilliant! Specifying the key works fine 👍

With "to be able to set any language" I meant that the text should adapt depending on which CultureInfo is being specified. Works fine just specifying the key.

Many thanks for your help with this 🥇