Question

我做了以下问题，已经回答了，

WPF: Trying to add a class to Window.Resources Again

但还有另一个问题：当我尝试访问＆＃34; CenterToolTipConverter＆＃34;通过样式资源的方法，消息出现：＆＃34;资源无法解析＆＃34;

CenterToolTipConverter.cs

namespace WpfApplication1
{
    public class CenterToolTipConverter : IMultiValueConverter
    {
        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
        {
            if (values.FirstOrDefault(v => v == DependencyProperty.UnsetValue) != null)
            {
                return double.NaN;
            }
            double placementTargetWidth = (double)values[0];
            double toolTipWidth = (double)values[1];
            return (placementTargetWidth / 2.0) - (toolTipWidth / 2.0);
        }

        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
        {
            throw new NotSupportedException();
        }
    }
}

MainWindow.xaml

<Window x:Class="WpfApplication1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:WpfApplication1;assembly=WpfApplication1"
    Title="MainWindow" Height="350" Width="525">

    <Window.Resources>
        <local:CenterToolTipConverter x:Key="myCenterToolTipConverter"/>
    </Window.Resources>
</Window>

直到这里，没问题。但是，当我尝试访问＆＃34; CenterToolTipConverter＆＃34;方法，在：

Styles.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                xmlns:sys="clr-namespace:System;assembly=mscorlib">

    <Style TargetType="{x:Type ToolTip}">
        <Setter Property="HorizontalOffset">
            <Setter.Value>
                <MultiBinding Converter="{StaticResource myCenterToolTipConverter}">
                    <Binding RelativeSource="{RelativeSource Self}" Path="PlacementTarget.ActualWidth"/>
                    <Binding RelativeSource="{RelativeSource Self}" Path="ActualWidth"/>
                </MultiBinding>
            </Setter.Value>
        </Setter>
    </Style>
</ResourceDictionary>

该消息错误发生（＆＃34;资源无法解析＆＃34;）。这有什么不对？在此先感谢!!

Answer 1

您已将转换器添加为Window中的资源，但ResourceDictionary不了解Window中定义的资源。

在ResourceDictionary中定义转换器，或在应用程序级别将两个资源添加到App.xaml.

访问用户类方法

1 个答案: