【TextBlock】

换行? ? TextWrapping="Wrap"

内容显示不全时显示省略号，如 “AAA...”? ??TextTrimming="CharacterEllipsis" //以单词边界做截断

鼠标提示? ?<ToolTip>

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例：??

TextBlock不允许换行，超出后显示省略号截断，超出的情况鼠标移上去会弹出提示内容。

?①? .xaml

<!--xaml 内容不允许换行，显示不下用省略号--><TextBlock TextTrimming="CharacterEllipsis" Width="150" TextWrapping="NoWrap" Text="AAAA"> <TextBlock.ToolTip> <ToolTip Style="{DynamicResource TooltipStyle}" Content="BBB"/> </TextBlock.ToolTip></TextBlock>

?② ToolTip样式定义

属性Visibility绑定转换器，仅当内容显示不全时弹出

<Style x:Key="TooltipStyle" TargetType="{x:Type ToolTip}"> <Setter Property="MaxWidth" Value="228"/> <Setter Property="BorderThickness" Value="0"/> <Setter Property="Background" Value="#FF565656"/> <Setter Property="FontFamily" Value="{DynamicResource BaseFontFamily}"/> <Setter Property="FontSize" Value="14"/> <Setter Property="Foreground" Value="#FFFFFFFF"/> <!--内容显示不全时弹出--> <Setter Property="Visibility" Value="{Binding RelativeSource={RelativeSource Self}, Path=PlacementTarget, Converter={StaticResource TrimToolTipConverter}}"/> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type ToolTip}"> <Border CornerRadius="4" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}"> <TextBlock Padding="8,4" Margin="0,-1,0,0" TextWrapping="Wrap" FontFamily="{TemplateBinding FontFamily}" FontSize="{TemplateBinding FontSize}" Foreground="{TemplateBinding Foreground}" Text="{TemplateBinding Content}"> </TextBlock> </Border> </ControlTemplate> </Setter.Value> </Setter> </Style>

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?③ Converter转换器

判断TextBlock是否启用Trim属性（内容显示不下），启用了则ToolTip可视

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows;using System.Windows.Controls;using System.Windows.Data;using System.Windows.Media;namespace ui.DataConverter{ /// <summary> /// 文字显示不下通过ToolTip提示显示 /// </summary> public class TrimmedTextBlockVisibilityConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { if (value == null) { return Visibility.Collapsed; } TextBlock textBlock = (TextBlock)value; bool isTrim = IsTextTrimmed(textBlock); if (isTrim) { return Visibility.Visible; } else { return Visibility.Collapsed; } } public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { throw new NotImplementedException(); } /// <summary> /// 判断当前显示的内容是否显示不全被截断 /// </summary> /// <param name="textBlock"></param> /// <returns></returns> private bool IsTextTrimmed(TextBlock textBlock) { Typeface typeface = new Typeface( textBlock.FontFamily, textBlock.FontStyle, textBlock.FontWeight, textBlock.FontStretch); FormattedText formattedText = new FormattedText( textBlock.Text, System.Threading.Thread.CurrentThread.CurrentCulture, textBlock.FlowDirection, typeface, textBlock.FontSize, textBlock.Foreground); bool isTrimmed = formattedText.Width > textBlock.Width; return isTrimmed; } }}

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