如何在XAML中修改Calendar控件的星期显示名称？

方法一：通过DataTrigger匹配替换文本 #

直接在DayTitleTemplateResourceKey对应的DataTemplate中，给TextBlock添加DataTrigger，根据默认绑定的星期文本替换为自定义名称。将原DataTemplate替换为以下代码：

<DataTemplate x:Key="{x:Static CalendarItem.DayTitleTemplateResourceKey}">
    <TextBlock Foreground="#FF333333"
               FontWeight="Bold"
               FontSize="9.5"
               FontFamily="Verdana"
               Margin="0,6,0,6"
               HorizontalAlignment="Center"
               VerticalAlignment="Center">
        <TextBlock.Style>
            <Style TargetType="TextBlock">
                <Setter Property="Text" Value="{Binding}" />
                <Style.Triggers>
                    <DataTrigger Binding="{Binding}" Value="Sun">
                        <Setter Property="Text" Value="周日" />
                    </DataTrigger>
                    <DataTrigger Binding="{Binding}" Value="Mon">
                        <Setter Property="Text" Value="周一" />
                    </DataTrigger>
                    <DataTrigger Binding="{Binding}" Value="Tue">
                        <Setter Property="Text" Value="周二" />
                    </DataTrigger>
                    <DataTrigger Binding="{Binding}" Value="Wed">
                        <Setter Property="Text" Value="周三" />
                    </DataTrigger>
                    <DataTrigger Binding="{Binding}" Value="Thu">
                        <Setter Property="Text" Value="周四" />
                    </DataTrigger>
                    <DataTrigger Binding="{Binding}" Value="Fri">
                        <Setter Property="Text" Value="周五" />
                    </DataTrigger>
                    <DataTrigger Binding="{Binding}" Value="Sat">
                        <Setter Property="Text" Value="周六" />
                    </DataTrigger>
                </Style.Triggers>
            </Style>
        </TextBlock.Style>
    </TextBlock>
</DataTemplate>

方法二：使用值转换器实现灵活转换 #

如果需要支持多语言或更复杂的转换逻辑，可创建值转换器类：

1. 编写转换器代码 #

using System;
using System.Globalization;
using System.Windows.Data;

public class WeekDayConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        var dayText = value as string;
        return dayText switch
        {
            "Sun" => "周日",
            "Mon" => "周一",
            "Tue" => "周二",
            "Wed" => "周三",
            "Thu" => "周四",
            "Fri" => "周五",
            "Sat" => "周六",
            _ => value
        };
    }

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

2. 在XAML中引用转换器 #

在Window/UserControl的资源节点中添加转换器实例：

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

3. 修改DataTemplate的绑定 #

<DataTemplate x:Key="{x:Static CalendarItem.DayTitleTemplateResourceKey}">
    <TextBlock Foreground="#FF333333"
               FontWeight="Bold"
               FontSize="9.5"
               FontFamily="Verdana"
               Margin="0,6,0,6"
               Text="{Binding Converter={StaticResource WeekDayConverter}}"
               HorizontalAlignment="Center"
               VerticalAlignment="Center" />
</DataTemplate>

关键注意事项 #

• 确保Calendar控件已应用修改后的样式：

  <Calendar CalendarItemStyle="{StaticResource CalendarItemStyle}" />
  

• 默认星期文本依赖系统文化，若系统为非英文环境，需调整DataTrigger中的Value值匹配系统默认文本。

内容的提问来源于stack exchange，提问作者Flax Mine