如何自动调整字体大小为一组的控制？(How to automatically scale font

我在WPF一些的TextBlocks中，我想这取决于它们的可用宽度/高度扩展的网格。 当我搜索了自动缩放字体大小典型的建议是把TextBlock的成视框。

所以我这样做：

<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="*" />
        <ColumnDefinition Width="*" />
        <ColumnDefinition Width="*" />
    </Grid.ColumnDefinitions>

    <Viewbox MaxHeight="18" Grid.Column="0" Stretch="Uniform" Margin="5" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
        <TextBlock Text="{Binding Text1}" />
    </Viewbox>

    <Viewbox MaxHeight="18" Grid.Column="1" Stretch="Uniform" Margin="5" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
        <TextBlock Text="{Binding Text2}" />
    </Viewbox>

    <Viewbox MaxHeight="18" Grid.Column="2" Stretch="Uniform" Margin="5" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
        <TextBlock Text="{Binding Text3}" />
    </Viewbox>
</Grid>

它会自动缩放每个TextBlock的字体。 然而，这看起来很滑稽，因为如果的TextBlocks的一个具有较长的文本，然后它会在一个较小的字体，而它的相邻网格元素将是一个更大的字体。 我想字体大小缩放按组，也许这将是很好，如果我可以指定一组控件的“SharedSizeGroup”自动大小的字体。

如

第一个文本框的文字可能是“2013年3月26日上午10点45分30秒”，而第二的TextBlocks文本可能会说“FILENAME.EXT”。 如果这些是跨越窗口的宽度，以及用户开始调整窗口的大小小。 日期将开始制造其字体比文件名更小，根据文件名的长度。

理想的情况下，一旦文本字段中的一个开始调整字体点大小，他们都会匹配。 有没有人想出了一个解决方案，这或可以给我你将如何使其工作机会？ 如果需要自定义代码，然后希望我们/我可以重新打包成一个自定义的混合或附加的行为，这样是可以重复使用的未来。 我认为这是一个相当普遍的问题，但我无法通过搜索找到它的任何东西。

---

更新我想马修的建议，并就排序的工作，但它也有一些副作用：

<Window x:Class="WpfApplication6.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="270" Width="522">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>

        <Rectangle Grid.Row="0" Fill="SkyBlue" />

        <Viewbox Grid.Row="1" MaxHeight="30"  Stretch="Uniform" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" >
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="Auto" SharedSizeGroup="col"/>
                    <ColumnDefinition Width="Auto" SharedSizeGroup="col"/>
                    <ColumnDefinition Width="Auto" SharedSizeGroup="col"/>
                </Grid.ColumnDefinitions>

                <TextBlock Grid.Column="0" Text="SomeLongText" Margin="5" />
                <TextBlock Grid.Column="1" Text="TextA" Margin="5" />
                <TextBlock Grid.Column="2" Text="TextB" Margin="5" />

            </Grid>
        </Viewbox>
    </Grid>
</Window>

老实说，缺少兴田比例列可能是我没问题。 我不会介意它自动调整大小的列做出明智的利用空间，但它跨越了窗口的整个宽度。

注意没有MAXSIZE，在这个扩展示例文本太大：

<Window x:Class="WpfApplication6.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="270" Width="522">
<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="*"/>
        <RowDefinition Height="Auto" />
    </Grid.RowDefinitions>

    <Rectangle Grid.Row="0" Fill="SkyBlue" />

    <Viewbox Grid.Row="1"  Stretch="Uniform" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" >
        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto" SharedSizeGroup="col"/>
                <ColumnDefinition Width="Auto" SharedSizeGroup="col"/>
                <ColumnDefinition Width="Auto" SharedSizeGroup="col"/>
            </Grid.ColumnDefinitions>

            <TextBlock Grid.Column="0" Text="SomeLongText" Margin="5" />
            <TextBlock Grid.Column="1" Text="TextA" Margin="5" />
            <TextBlock Grid.Column="2" Text="TextB" Margin="5" />

        </Grid>
    </Viewbox>
</Grid>

在这里，我想限制的字体可以获得多大，所以它不会浪费垂直窗口地产。 我期待的输出为左对齐，居中，右与字体为尽可能大到期望的最大尺寸。

---

@adabyron

你提出的解决方案是不坏（而且是最好的还没有），但它确实有一定的局限性。 例如，最初我想我的专栏成正比（注：第二个应该是居中）。 例如，我的TextBlocks可能被标记开始，中心和图形 ，其中排列事项停止 。

<Window x:Class="WpfApplication6.Window1"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
        xmlns:b="clr-namespace:WpfApplication6.Behavior"
        Title="MainWindow" Height="350" Width="525">

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>

        <Rectangle Grid.Row="0" Fill="SkyBlue" />
        <Line X1="0.5" X2="0.5" Y1="0" Y2="1" Stretch="Fill" StrokeThickness="3" Stroke="Red" />

        <Grid Grid.Row="1">

            <i:Interaction.Behaviors>
                <b:MoveToViewboxBehavior />
            </i:Interaction.Behaviors>

            <Viewbox Stretch="Uniform" />
            <ContentPresenter >
                <ContentPresenter.Content>
                    <Grid x:Name="TextBlockContainer">
                        <Grid.Resources>
                            <Style TargetType="TextBlock" >
                                <Setter Property="FontSize" Value="16" />
                                <Setter Property="Margin" Value="5" />
                            </Style>
                        </Grid.Resources>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="*"  />
                            <ColumnDefinition Width="*"  />
                            <ColumnDefinition Width="*"  />
                            <ColumnDefinition Width="*"  />
                            <ColumnDefinition Width="*"  />
                        </Grid.ColumnDefinitions>

                        <TextBlock Grid.Column="0" Text="SomeLongText" VerticalAlignment="Center" HorizontalAlignment="Center" />
                        <TextBlock Grid.Column="2" Text="TextA" HorizontalAlignment="Center" VerticalAlignment="Center" />
                        <TextBlock Grid.Column="4" Text="TextB" HorizontalAlignment="Center" VerticalAlignment="Center" />
                    </Grid>
                </ContentPresenter.Content>
            </ContentPresenter>
        </Grid>
    </Grid>
</Window>

这里是结果。 请注意，它不知道它是越来越裁剪早，然后当它替换视框看起来好像网格默认列宽“自动”，不再对准中心。

Answer 1:

我想编辑我已经提供了答案，但后来决定它更有意义发布一个新的，因为它实际上取决于我更喜欢​​哪一个要求。 这也许这里适合艾伦的想法更好，因为

• 中间的文本块停留在窗口的中间
• 由于高度限幅字体大小调整accomodated
• 相当多的通用
• 没有参与视框

---

在另一个的优点是

• 空间为的TextBlocks被更有效地分配（没有不必要的边距）
• 的TextBlocks可能有不同的fontsizes

我还类型的StackPanel / DockPanel中的顶部容器测试该溶液中，表现得体。

需要注意的是通过与行/列宽/高玩弄（自动/ starsized），就可以得到不同的行为。 因此，它也有可能有starsized所有三个文本块列，但是这意味着早期确实发生宽度裁切，有更多的保证金。 或者，如果电网驻留在该行自动大小，不会发生高度剪裁。

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:i="http://schemas.microsoft.com/expression/2010/interactivity"
            xmlns:beh="clr-namespace:WpfApplication1.Behavior"
            Title="MainWindow" Height="350" Width="525">

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="0.9*"/>
            <RowDefinition Height="0.1*" />
        </Grid.RowDefinitions>

        <Rectangle Fill="DarkOrange" />

        <Grid x:Name="TextBlockContainer" Grid.Row="1" >
            <i:Interaction.Behaviors>
                <beh:ScaleFontBehavior MaxFontSize="32" />
            </i:Interaction.Behaviors>
            <Grid.Resources>
                <Style TargetType="TextBlock" >
                    <Setter Property="Margin" Value="5" />
                    <Setter Property="VerticalAlignment" Value="Center" />
                </Style>
            </Grid.Resources>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*"  />
                <ColumnDefinition Width="Auto"  />
                <ColumnDefinition Width="*"  />
            </Grid.ColumnDefinitions>

            <TextBlock Grid.Column="0" Text="SomeLongText" />
            <TextBlock Grid.Column="1" Text="TextA" HorizontalAlignment="Center"  />
            <TextBlock Grid.Column="2" Text="TextB" HorizontalAlignment="Right"  />
        </Grid>
    </Grid>
</Window>

ScaleFontBehavior：

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Interactivity;
using System.Windows.Media;
using WpfApplication1.Helpers;

namespace WpfApplication1.Behavior
{
    public class ScaleFontBehavior : Behavior<Grid>
    {
        // MaxFontSize
        public double MaxFontSize { get { return (double)GetValue(MaxFontSizeProperty); } set { SetValue(MaxFontSizeProperty, value); } }
        public static readonly DependencyProperty MaxFontSizeProperty = DependencyProperty.Register("MaxFontSize", typeof(double), typeof(ScaleFontBehavior), new PropertyMetadata(20d));

        protected override void OnAttached()
        {
            this.AssociatedObject.SizeChanged += (s, e) => { CalculateFontSize(); };
        }

        private void CalculateFontSize()
        {
            double fontSize = this.MaxFontSize;

            List<TextBlock> tbs = VisualHelper.FindVisualChildren<TextBlock>(this.AssociatedObject);

            // get grid height (if limited)
            double gridHeight = double.MaxValue;
            Grid parentGrid = VisualHelper.FindUpVisualTree<Grid>(this.AssociatedObject.Parent);
            if (parentGrid != null)
            {
                RowDefinition row = parentGrid.RowDefinitions[Grid.GetRow(this.AssociatedObject)];
                gridHeight = row.Height == GridLength.Auto ? double.MaxValue : this.AssociatedObject.ActualHeight;
            }

            foreach (var tb in tbs)
            {
                // get desired size with fontsize = MaxFontSize
                Size desiredSize = MeasureText(tb);
                double widthMargins = tb.Margin.Left + tb.Margin.Right;
                double heightMargins = tb.Margin.Top + tb.Margin.Bottom; 

                double desiredHeight = desiredSize.Height + heightMargins;
                double desiredWidth = desiredSize.Width + widthMargins;

                // adjust fontsize if text would be clipped vertically
                if (gridHeight < desiredHeight)
                {
                    double factor = (desiredHeight - heightMargins) / (this.AssociatedObject.ActualHeight - heightMargins);
                    fontSize = Math.Min(fontSize, MaxFontSize / factor);
                }

                // get column width (if limited)
                ColumnDefinition col = this.AssociatedObject.ColumnDefinitions[Grid.GetColumn(tb)];
                double colWidth = col.Width == GridLength.Auto ? double.MaxValue : col.ActualWidth;

                // adjust fontsize if text would be clipped horizontally
                if (colWidth < desiredWidth)
                {
                    double factor = (desiredWidth - widthMargins) / (col.ActualWidth - widthMargins);
                    fontSize = Math.Min(fontSize, MaxFontSize / factor);
                }
            }

            // apply fontsize (always equal fontsizes)
            foreach (var tb in tbs)
            {
                tb.FontSize = fontSize;
            }
        }

        // Measures text size of textblock
        private Size MeasureText(TextBlock tb)
        {
            var formattedText = new FormattedText(tb.Text, CultureInfo.CurrentUICulture,
                FlowDirection.LeftToRight,
                new Typeface(tb.FontFamily, tb.FontStyle, tb.FontWeight, tb.FontStretch),
                this.MaxFontSize, Brushes.Black); // always uses MaxFontSize for desiredSize

            return new Size(formattedText.Width, formattedText.Height);
        }
    }
}

VisualHelper：

public static List<T> FindVisualChildren<T>(DependencyObject obj) where T : DependencyObject
{
    List<T> children = new List<T>();
    for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
    {
        var o = VisualTreeHelper.GetChild(obj, i);
        if (o != null)
        {
            if (o is T)
                children.Add((T)o);

            children.AddRange(FindVisualChildren<T>(o)); // recursive
        }
    }
    return children;
}

public static T FindUpVisualTree<T>(DependencyObject initial) where T : DependencyObject
{
    DependencyObject current = initial;

    while (current != null && current.GetType() != typeof(T))
    {
        current = VisualTreeHelper.GetParent(current);
    }
    return current as T;
}

Answer 2:

把你的网格，视框，这将扩大整个电网：

<Viewbox Stretch="Uniform" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*" />
            <ColumnDefinition Width="*" />
            <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>

        <TextBlock Grid.Column="0" Text="{Binding Text1}" Margin="5" />
        <TextBlock Grid.Column="1" Text="{Binding Text2}" Margin="5" />
        <TextBlock Grid.Column="2" Text="{Binding Text3}" Margin="5" />

    </Grid>
</Viewbox>

Answer 3:

我想我知道要走的路，并会留下其余的给你。 在这个例子中，我结合的字号到TextBlock的的ActualHeight，使用的转换器（该转换器是下面）：

<Window x:Class="MyNamespace.Test"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:Converters="clr-namespace:UpdateYeti.Converters"
    Title="Test" Height="570" Width="522">
<Grid Height="370" Width="522">
    <Grid.Resources>
        <Converters:HeightToFontSizeConverter x:Key="conv" />
    </Grid.Resources>
    <Grid.RowDefinitions>
        <RowDefinition Height="*"/>
        <RowDefinition Height="Auto" />
    </Grid.RowDefinitions>

    <Rectangle Grid.Row="0" Fill="SkyBlue" />
        <Grid Grid.Row="1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" MinHeight="60" Background="Beige">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto" />
            <ColumnDefinition Width="*" />
            <ColumnDefinition Width="Auto" />
        </Grid.ColumnDefinitions>
        <TextBlock Grid.Column="0" Text="SomeLongText" Margin="5" 
                   FontSize="{Binding RelativeSource={RelativeSource Self}, Path=ActualHeight, Converter={StaticResource conv}}" />
        <TextBlock Grid.Column="1" Text="TextA" Margin="5" HorizontalAlignment="Center" 
                   FontSize="{Binding RelativeSource={RelativeSource Self}, Path=ActualHeight, Converter={StaticResource conv}}" />
        <TextBlock Grid.Column="2" Text="TextB" Margin="5" FontSize="{Binding RelativeSource={RelativeSource Self}, Path=ActualHeight, Converter={StaticResource conv}}" />
        </Grid>
    </Grid>
</Window>


[ValueConversion(typeof(double), typeof(double))]
class HeightToFontSizeConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        // here you can use the parameter that you can give in here via setting , ConverterParameter='something'} or use any nice login with the VisualTreeHelper to make a better return value, or maybe even just hardcode some max values if you like
        var height = (double)value;
        return .65 * height;
    }

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

Answer 4:

一般的话：一个可能的替代整个文本缩放可以只使用的TextTrimming上的TextBlocks。

我一直在努力寻找解决这一之一。 使用视框实在是很难与任何布局调整混合。 最糟糕的是，ActualWidth的等不视框里面更改。 所以我最后决定使用视框只有在绝对必要的，这是裁剪将发生时。 所以，我是移动ContentPresenter和视框之间的内容，这取决于可用空间。

---

---

这种解决方案并不像一般的，因为我想，主要是MoveToViewboxBehavior并假定它是连接到具有以下结构的网格。 如果不能accomodated，行为将极有可能进行调整。 创建一个用户控件，并表示必要的零件（PART _...）可能是一个有效的替代。

请注意，我已经扩展了网格的行从三到五年，因为这使得该解决方案轻松了许多。 这意味着，中文字块也不会完全在中间，以绝对坐标的意义，相反，它是对的TextBlocks左，右的中间。

<Grid > <!-- MoveToViewboxBehavior attached to this grid -->
    <Viewbox />
    <ContentPresenter>
        <ContentPresenter.Content> 
            <Grid x:Name="TextBlockContainer">                       
                <TextBlocks ... />
            </Grid>
        </ContentPresenter.Content>
    </ContentPresenter>
</Grid>

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:i="http://schemas.microsoft.com/expression/2010/interactivity"
        xmlns:beh="clr-namespace:WpfApplication1.Behavior"
        Title="MainWindow" Height="350" Width="525">

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>

        <Rectangle Grid.Row="0" Fill="SkyBlue" />

        <Grid Grid.Row="1">

            <i:Interaction.Behaviors>
                <beh:MoveToViewboxBehavior />
            </i:Interaction.Behaviors>

            <Viewbox Stretch="Uniform" />
            <ContentPresenter >
                <ContentPresenter.Content>
                    <Grid x:Name="TextBlockContainer">
                        <Grid.Resources>
                            <Style TargetType="TextBlock" >
                                <Setter Property="FontSize" Value="16" />
                                <Setter Property="Margin" Value="5" />
                            </Style>
                        </Grid.Resources>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="Auto"  />
                            <ColumnDefinition Width="*"  />
                            <ColumnDefinition Width="Auto"  />
                            <ColumnDefinition Width="*"  />
                            <ColumnDefinition Width="Auto"  />
                        </Grid.ColumnDefinitions>

                        <TextBlock Grid.Column="0" Text="SomeLongText" />
                        <TextBlock Grid.Column="2" Text="TextA"  />
                        <TextBlock Grid.Column="4" Text="TextB"  />
                    </Grid>
                </ContentPresenter.Content>
            </ContentPresenter>
        </Grid>
    </Grid>
</Window>

MoveToViewBoxBehavior：

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Interactivity;
using System.Windows.Media;
using WpfApplication1.Helpers;

namespace WpfApplication1.Behavior
{
    public class MoveToViewboxBehavior : Behavior<Grid>
    {
        // IsClipped 
        public bool IsClipped { get { return (bool)GetValue(IsClippedProperty); } set { SetValue(IsClippedProperty, value); } }
        public static readonly DependencyProperty IsClippedProperty = DependencyProperty.Register("IsClipped", typeof(bool), typeof(MoveToViewboxBehavior), new PropertyMetadata(false, OnIsClippedChanged));

        private static void OnIsClippedChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
        {
            var beh = (MoveToViewboxBehavior)sender;
            Grid grid = beh.AssociatedObject;

            Viewbox vb = VisualHelper.FindVisualChild<Viewbox>(grid);
            ContentPresenter cp = VisualHelper.FindVisualChild<ContentPresenter>(grid);

            if ((bool)e.NewValue) 
            {
                // is clipped, so move content to Viewbox
                UIElement element = cp.Content as UIElement;
                cp.Content = null;
                vb.Child = element;
            }
            else
            {
                // can be shown without clipping, so move content to ContentPresenter
                cp.Content = vb.Child;
                vb.Child = null;
            }
        }

        protected override void OnAttached()
        {
            this.AssociatedObject.SizeChanged += (s, e) => { IsClipped = CalculateIsClipped(); };
        }

        // Determines if the width of all textblocks within TextBlockContainer (using MaxFontSize) are wider than the AssociatedObject grid
        private bool CalculateIsClipped()
        {
            double totalDesiredWidth = 0d;
            Grid grid = VisualHelper.FindVisualChildByName<Grid>(this.AssociatedObject, "TextBlockContainer");
            List<TextBlock> tbs = VisualHelper.FindVisualChildren<TextBlock>(grid);

            foreach (var tb in tbs)
            {
                if (tb.TextWrapping != TextWrapping.NoWrap)
                    return false;

                totalDesiredWidth += MeasureText(tb).Width + tb.Margin.Left + tb.Margin.Right + tb.Padding.Left + tb.Padding.Right;
            }

            return Math.Round(this.AssociatedObject.ActualWidth, 5) < Math.Round(totalDesiredWidth, 5);
        }

        // Measures text size of textblock
        private Size MeasureText(TextBlock tb)
        {
            var formattedText = new FormattedText(tb.Text, CultureInfo.CurrentUICulture,
                FlowDirection.LeftToRight,
                new Typeface(tb.FontFamily, tb.FontStyle, tb.FontWeight, tb.FontStretch),
                tb.FontSize, Brushes.Black);

            return new Size(formattedText.Width, formattedText.Height);
        }
    }
}

VisualHelper：

public static class VisualHelper
{
    public static T FindVisualChild<T>(DependencyObject obj) where T : DependencyObject
    {
        T child = null;
        for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
        {
            var o = VisualTreeHelper.GetChild(obj, i);
            if (o != null)
            {
                child = o as T;
                if (child != null) break;
                else
                {
                    child = FindVisualChild<T>(o); // recursive
                    if (child != null) break;
                }
            }
        }
        return child;
    }

    public static List<T> FindVisualChildren<T>(DependencyObject obj) where T : DependencyObject
    {
        List<T> children = new List<T>();
        for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
        {
            var o = VisualTreeHelper.GetChild(obj, i);
            if (o != null)
            {
                if (o is T)
                    children.Add((T)o);

                children.AddRange(FindVisualChildren<T>(o)); // recursive
            }
        }
        return children;
    }

    public static T FindVisualChildByName<T>(DependencyObject parent, string name) where T : FrameworkElement
    {
        T child = default(T);
        for (int i = 0; i < VisualTreeHelper.GetChildrenCount(parent); i++)
        {
            var o = VisualTreeHelper.GetChild(parent, i);
            if (o != null)
            {
                child = o as T;
                if (child != null && child.Name == name)
                    break;
                else
                    child = FindVisualChildByName<T>(o, name);

                if (child != null) break;
            }
        }
        return child;
    }
}

Answer 5:

您可以在视框使用隐藏的ItemsControl。

<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="*"/>
        <ColumnDefinition Width="*"/>
        <ColumnDefinition Width="*"/>
    </Grid.ColumnDefinitions>
    <Viewbox VerticalAlignment="Bottom">
        <Grid>
            <TextBlock Text="SomeLongText"/>
            <ItemsControl Visibility="Hidden">
                <ItemsPanelTemplate>
                    <Grid/>
                </ItemsPanelTemplate>
                <TextBlock Text="SomeLongText"/>
                <TextBlock Text="TextA"/>
                <TextBlock Text="TextB"/>
            </ItemsControl>
        </Grid>
    </Viewbox>
    <Viewbox Grid.Column="1" VerticalAlignment="Bottom">
        <Grid>
            <TextBlock Text="TextA"/>
            <ItemsControl Visibility="Hidden">
                <ItemsPanelTemplate>
                    <Grid/>
                </ItemsPanelTemplate>
                <TextBlock Text="SomeLongText"/>
                <TextBlock Text="TextA"/>
                <TextBlock Text="TextB"/>
            </ItemsControl>
        </Grid>
    </Viewbox>
    <Viewbox Grid.Column="2" VerticalAlignment="Bottom">
        <Grid>
            <TextBlock Text="TextB"/>
            <ItemsControl Visibility="Hidden">
                <ItemsPanelTemplate>
                    <Grid/>
                </ItemsPanelTemplate>
                <TextBlock Text="SomeLongText"/>
                <TextBlock Text="TextA"/>
                <TextBlock Text="TextB"/>
            </ItemsControl>
        </Grid>
    </Viewbox>
</Grid>

要么

<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="*"/>
        <ColumnDefinition Width="*"/>
        <ColumnDefinition Width="*"/>
    </Grid.ColumnDefinitions>
    <Viewbox VerticalAlignment="Bottom">
        <Grid>
            <TextBlock Text="{Binding Text1}"/>
            <ItemsControl Visibility="Hidden" ItemsSource="{Binding AllText}">
                <ItemsPanelTemplate>
                    <Grid/>
                </ItemsPanelTemplate>
                <ItemsControl.ItemTemplate>
                    <DataTemplate>
                        <TextBlock Text="{Binding}"/>
                    </DataTemplate>
                </ItemsControl.ItemTemplate>
            </ItemsControl>
        </Grid>
    </Viewbox>
    <Viewbox Grid.Column="1" VerticalAlignment="Bottom">
        <Grid>
            <TextBlock Text="{Binding Text2}"/>
            <ItemsControl Visibility="Hidden" ItemsSource="{Binding AllText}">
                <ItemsPanelTemplate>
                    <Grid/>
                </ItemsPanelTemplate>
                <ItemsControl.ItemTemplate>
                    <DataTemplate>
                        <TextBlock Text="{Binding}"/>
                    </DataTemplate>
                </ItemsControl.ItemTemplate>
            </ItemsControl>
        </Grid>
    </Viewbox>
    <Viewbox Grid.Column="2" VerticalAlignment="Bottom">
        <Grid>
            <TextBlock Text="{Binding Text3}"/>
            <ItemsControl Visibility="Hidden" ItemsSource="{Binding AllText}">
                <ItemsPanelTemplate>
                    <Grid/>
                </ItemsPanelTemplate>
                <ItemsControl.ItemTemplate>
                    <DataTemplate>
                        <TextBlock Text="{Binding}"/>
                    </DataTemplate>
                </ItemsControl.ItemTemplate>
            </ItemsControl>
        </Grid>
    </Viewbox>
</Grid>

Answer 6:

一个解决方案是类似的东西：

选择一个maxFontSize，然后定义适当的字号被显示在考虑通过使用线性方程当前窗口。 窗口的高度或宽度将限制最终字号的选择。

让我们采取了“单一种类的TextBlock”为整个电网的情况下：

Window.Current.SizeChanged += (sender, args) =>
        {
            int minFontSize = a;
            int maxFontSize = b;
            int maxMinFontSizeDiff = maxFontSize - minFontSize;

            int gridMinHeight = c;
            int gridMaxHeight = d;
            int gridMaxMinHeightDiff = gridMaxHeight - gridMinHeight;

            int gridMinWidth = e;
            int gridMaxWidth = f;
            int gridMaxMinHeightDiff = gridMaxWidth - gridMaxWidth;

            //Linear equation considering "max/min FontSize" and "max/min GridHeight/GridWidth"
            double heightFontSizeDouble = (maxMinFontSizeDiff / gridMaxMinHeightDiff ) * Grid.ActualHeight + (maxFontSize - (gridMaxHeight * (maxMinFontSizeDiff  / gridMaxMinHeightDiff)))
            double widthFontSizeDouble = (maxMinFontSizeDiff / gridMaxMinWidthDiff ) * Grid.ActualWidth + (maxFontSize - (gridMaxWidth * (maxMinFontSizeDiff  / gridMaxMinWidthDiff)))

            int heightFontSize = (int)Math.Round(heightFontSizeDouble)
            int widthFontSize = (int)Math.Round(widthFontSizeDouble)

            foreach (var children in Grid.Children)
            {                    
                (children as TextBlock).FontSize = Math.Min(heightFontSize, widthFontSize);
            }
        }

文章来源: How to automatically scale font size for a group of controls?