WPF：无法在 Window.Resources 中实例化类
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WPF: Can't instantiate class in Window.Resources
提问by matt-pielat
I'm doing this WPF tutorial and for some reason I get an error when adding a custom SlidersToColorConverterclass to resources.
我正在做这个 WPF 教程，由于某种原因，我在向SlidersToColorConverter资源添加自定义类时出错。
Someone on StackOverflow was doing it exact same way.
StackOverflow 上的某个人正在以完全相同的方式做这件事。
MainWindow.xaml:
主窗口.xaml：
<Window x:Class="WpfApplication2.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApplication2"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<local:SlidersToColorConverter x:Key="whyareyounotworking"/>
</Window.Resources>
</Window>
SlidersToColorConverter.cs:
SlidersToColorConverter.cs：
namespace WpfApplication2
{
class SlidersToColorConverter : IMultiValueConverter
{
public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
double red = (double)values[0];
double green = (double)values[1];
double blue = (double)values[2];
return new SolidColorBrush(Color.FromArgb(255, (byte)red, (byte)green, (byte)blue));
}
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
}
Error List:
错误列表：
The name "SlidersToColorConverter" does not exist in the namespace "clr-namespace:WpfApplication2". c:\users\mateusz\documents\visual studio 2013\Projects\WpfApplication2\WpfApplication2\MainWindow.xaml 39 9 WpfApplication2
回答by Jason Down
It looks like the class is private (by default). You must change your definition to
看起来这个类是私有的（默认情况下）。您必须将定义更改为
public class SlidersToColorConverter : IMultiValueConverter
