Question

在我的项目中，我需要将ui元素的可见性绑定到bool属性，因为您知道caliburn.micro具有约定“CanName”，所以我想添加我自己的自定义约定。然后我发现[可见性自动绑定与命名约定我在我的项目中添加此代码，但它不起作用和约定“CanName”也不起作用。

ConventionManager.AddElementConvention<FrameworkElement>(Control.VisibilityProperty, "Visibility", "IsVisible");
            var baseBindProperties = ViewModelBinder.BindProperties;
            ViewModelBinder.BindProperties = (frameWorkElements, viewModel) =>
            {
                BindVisiblityProperties(frameWorkElements, viewModel);
                return baseBindProperties(frameWorkElements, viewModel);
            };


static void BindVisiblityProperties(IEnumerable<FrameworkElement> items, Type viewModel)
        {
            foreach (FrameworkElement element in items)
            {
                string PropertyName = element.Name + "IsVisible";
                var property = viewModel.GetPropertyCaseInsensitive(PropertyName);
                if (property != null)
                {
                    var convention = ConventionManager.GetElementConvention(typeof(FrameworkElement));
                    ConventionManager.SetBindingWithoutBindingOverwrite(viewModel, PropertyName, property,
                        element, convention, convention.GetBindableProperty(element));
                }
            }
        }

任何人都知道这段代码有什么问题吗？

Answer 1

我在我的项目中使用本公约没有任何问题。这是一个演练：

在AppBootstrapper.cs中，您在其他特定公约中包含了元素公约

private static void AddCustomConventions()
{
ConventionManager.AddElementConvention<FrameworkElement>(Control.VisibilityProperty, "Visibility", "IsVisible");
            var baseBindProperties = ViewModelBinder.BindProperties;
            ViewModelBinder.BindProperties = (frameWorkElements, viewModel) =>
                {
                    BindVisiblityProperties(frameWorkElements, viewModel);
                    return baseBindProperties(frameWorkElements, viewModel);
                };
}

和你的助手方法：

private static void BindVisiblityProperties(IEnumerable<FrameworkElement> items, Type viewModel)
        {
            foreach (FrameworkElement element in items)
            {
                string PropertyName = element.Name + "IsVisible";
                var property = viewModel.GetPropertyCaseInsensitive(PropertyName);
                if (property != null)
                {
                    var convention = ConventionManager.GetElementConvention(typeof(FrameworkElement));
                    ConventionManager.SetBindingWithoutBindingOverwrite(
                        viewModel, PropertyName, property, element, convention, convention.GetBindableProperty(element));
                }
            }
        }

在PageView.xaml放置您的控件并提供x:Name

<StackPanel Orientation="Horizontal" HorizontalAlignment="Center">
                <Button x:Name="StartRecord">start</Button>
                <Button x:Name="StopRecord">stop</Button>
                <Button x:Name="Foo">foo</Button>
                <Button x:Name="Bar">bar</Button>
            </StackPanel>

在PageViewModel.cs public property内bool类型public bool FooIsVisible { get { return true; } } public bool BarIsVisible { get { return false; } }后缀为IsVisible

{{1}}

如何为caliburn.micro添加自定义约定？

1 个答案: