Xamarin Forms将模型值传递给绑定转换器参数

Question

我想将模型属性值像转换器参数一样传递给其他绑定值。

<Label FontSize="{Binding MediumLabelTextSize}"
       Text="{Binding FeedHome.QuestionBody,
              Converter={StaticResource HideLongTextConverter}}"/>
<Label FontSize="{Binding SmallLabelTextSize}"
        IsVisible="{Binding IsQuestionReadMoreVisible}"
        Text="Read more">
        <Label.GestureRecognizers>
            <TapGestureRecognizer Command="{Binding ReadMoreCommand}"
                            CommandParameter="{Binding .}"/>
        </Label.GestureRecognizers>
</Label>

我想将FeedHome.QuestionBody传递给IsQuestionReadMoreVisible的转换器参数。 我该怎么办？

Answer 1

请试试这个

Text =＆＃34; {Binding HeaderText，Converter = {StaticResource caseConverter}，ConverterParameter = u}}＆＃34;  IsVisible =＆＃34; {Binding IsEditMode，Converter = {StaticResource boolInverter}}＆＃34;