C# 获取MVVM中BooleantVisibilityConverter的xaml绑定代码时出错

我在视图中使用了进度条，如下所示：

<ProgressBar  IsIndeterminate="{Binding IsBusy}" Visibility="{Binding IsBusy,Converter={StaticResource BooleanToVisibilityConverter}}" HorizontalAlignment="Left" Height="33" Margin="46,222,0,0" VerticalAlignment="Top" Width="358"/>

• BooleantVisibilityConverter在ViewModel中定义
• 获取视图的xaml代码时出错

*错误是：

命名空间“”中不存在名称“BooleanToVisibilityConverter”

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请告诉我如何解决此错误

您需要在xaml中定义名称空间。在窗口/用户控件的顶层，您需要定义一个xml命名空间：

xmlns:yn="clr-namespace:YourNamespace"

<yn:BooleanToVisibilityConverter ... />

然后，您需要使用该名称空间引用您的

BooleanToVisibilityConverter

：

xmlns:yn="clr-namespace:YourNamespace"

<yn:BooleanToVisibilityConverter ... />

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您可以这样定义转换器：

namespace YourNamespace
{
    public class BooleanToVisibilityConverter : IValueConverter
    {

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return (bool)value ? Visibility.Visible : Visibility.Collapsed;
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}

构建您的解决方案！ 在XAML中：

<navigation:Page x:Class="MyCustomNamespace"
    xmlns:converters="clr-namespace:YourNamespace">
    <navigation:Page.Resources>
        <converters:BooleanToVisibilityConverter x:Key="BooleanToVisibility" />
    </navigation:Page.Resources>
    <TextBlock Visibility="{Binding BooleanFromViewModel, Convert={StaticResource BooleanToVisibility}" />
</navigation:Page>

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请发布您的xaml、viewmodel和转换器代码