markup-extensions | 易学教程

How do I resolve the value of a databinding inside a MarkupExtension?

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I've made a markup extension for translating strings based on a key. Example <TextBlock Text="{Translate myKey}" /> Now I want to be able to use nested bindings for providing my keys. Example: <TextBlock Text="{Translate {Binding KeyFromDataContext}}" /> When I do this I get a System.Windows.Data.Binding object. By calling ProvideValue and passing down the ServiceProvider I can get a BindingExpression: var binding = Key as Binding; if (binding == null) { return null; } var bindingExpression = binding.ProvideValue(_serviceProvider) as BindingExpression; if (bindingExpression == null) { return

MarkupExtension that uses a DataBinding value

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问题 I'm trying to create a WPF MarkupExtension class that provides translated text from my text translation class. The translation stuff works great, but requires a static method call with a text key to return the translated text. Like this: ImportLabel.Text = Translator.Translate("import files"); // will be "Dateien importieren" in de or "Import files" in en Its speciality is that it accepts a counting value to provide better wordings. ImportLabel.Text = Translator.Translate("import n files",

How do I resolve the value of a databinding inside a MarkupExtension?

阅读更多关于 How do I resolve the value of a databinding inside a MarkupExtension?

问题 I've made a markup extension for translating strings based on a key. Example <TextBlock Text="{Translate myKey}" /> Now I want to be able to use nested bindings for providing my keys. Example: <TextBlock Text="{Translate {Binding KeyFromDataContext}}" /> When I do this I get a System.Windows.Data.Binding object. By calling ProvideValue and passing down the ServiceProvider I can get a BindingExpression: var binding = Key as Binding; if (binding == null) { return null; } var bindingExpression =