在 Windows Phone 8 应用程序中将转换器绑定到 XAML [英] Binding converter to XAML in windows phone 8 app
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问题描述
我的 .xaml 页面代码:
<phone:PhoneApplicationPage
x:Class="MVVM1Test.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:converter="clr-namespace:MVVM1Test.Resources.Converters"
mc:Ignorable="d"
SupportedOrientations="Portrait" Orientation="Portrait"
shell:SystemTray.IsVisible="True">
<phone:PhoneApplicationPage.Resources>
<converter:NotConverter x:Name="not"></converter:NotConverter>
</phone:PhoneApplicationPage.Resources>
<!--LayoutRoot is the root grid where all page content is placed-->
<Grid x:Name="LayoutRoot" Background="Gray">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
</Grid>
</phone:PhoneApplicationPage>
notconverter.cs
namespace MVVM1Test.Resources.Converters
{
public class NotConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
return !(bool)value;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
return !(bool)value;
}
}
}
显示错误
名称 NotConverter 在名称空间 clr-namespace:MVVM1Test.Resources.Converters 中不存在"
"the name NotConverter does not exists in the namespace clr-namespace:MVVM1Test.Resources.Converters"
但我也将转换器类添加到解决方案中.
But i have added the converter class also to the solution.
推荐答案
在资源字典中放置项目时,必须给它们提供键.x:Name
属性是多余的(除非您需要从后面的代码访问对象).
When you place items in a resource dictionary, you must give them keys. The x:Name
property is redundant (unless you need to access the object from code behind).
<converter:NotConverter x:Key="not" />
此外,您遇到的错误可能是设计时问题.尝试在我建议的更改后编译和运行.
Also, the error you're getting could be a design-time problem. Try to compile and run after the change I suggested.
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