Xamarin表单中的绑定错误 [英] Binding errors in Xamarin Forms

问题描述

在开发Xamarin Forms应用程序时，是否可以查看绑定错误? 应用程序输出"选项卡什么都没有显示，但是绑定不起作用.如何调试绑定?

Is there a way I can see the binding errors in while developing Xamarin Forms apps? The Application Output tab shows nothing but the binding doesn't work. How can I debug bindings?

推荐答案

我建议您添加EmptyConverter:

public class EmptyConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return value;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return value;
    }
}

然后在您的页面上创建转换器实例:

Then create instance of converter on your page:

<ContentPage.Resources>
    <ResourceDictionary>
      <converters:EmptyConverter x:Key="EmptyConverter"/>
    </ResourceDictionary>
</ContentPage.Resources>

然后将转换器添加到标签:

Then add converter to label:

<Label Text="{Binding Text, Converter={StaticResource EmptyConverter}}"/>

在Convert和ConvertBack方法中放置断点，您将能够看到绑定值的所有变化.

Put breakpoints in Convert and ConvertBack methods and you'll be able to see all changes of binded values.

希望这会对您有所帮助.

Hope this will help you.

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