如何增加 mahapps.metro 文本框水印文本的字体大小

Question

如何在下面的 WPF 代码中增加水印文本的字体大小（'8 小时'）：

<TextBox x:Name="txt8HoursArm1"
                                     Margin="5"
                                     Grid.Column="1"
                                     IsTabStop="False"
                                     Style="{StaticResource PrimaryInputTextBoxStyle}"
                                     Controls:TextBoxHelper.UseFloatingWatermark="True"
                                     Controls:TextBoxHelper.Watermark="8 Hours"
                                     IsEnabled="False"
                                     Text="1"
                                     GotFocus="txt_GotFocus"
                                     PreviewTextInput="txt_PreviewTextInput"
                                     TextChanged="txt_TextChanged" FontSize="14" />

请看下图的文本框

Answer 1

或者您可以创建自己的风格，完全控制一切：

<Style x:Key="TaggedTextBox"  TargetType="{x:Type TextBox}">
    <Setter Property="Background" Value="Hotpink"/>
    <Setter Property="Foreground" Value="White"/>
    <Setter Property="Height" Value="32"/>
    <Setter Property="FontSize" Value="15" />
    <Setter Property="FontFamily" Value="Arial" />
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="TextBox">
                <Grid>
                    <TextBox HorizontalContentAlignment="Left" Text="{TemplateBinding Text}" Background="{TemplateBinding Background}" VerticalContentAlignment="Bottom" Foreground="{TemplateBinding Foreground}" FontSize="{TemplateBinding FontSize}" />
                    <TextBlock Foreground="Lime" HorizontalAlignment="Left" VerticalAlignment="Top" FontSize="10" Margin="5,2" Text="{TemplateBinding Tag}"/>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

使用：

<TextBox Style="{StaticResource TaggedTextBox}" Tag="Cheese" Text="Spaghetti"/>

看：

Answer 2

如果您使用的是 mahapps.metro version >= 2.0 则执行此操作：

<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">

    <sys:Double x:Key="MahApps.Font.Size.FloatingWatermark">15</sys:Double>
</ResourceDictionary>

如果您的 mahapps.metro version < 2.0 是：

<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">

    <sys:Double x:Key="FloatingWatermarkFontSize">15</sys:Double>
</ResourceDictionary>

Source

如何增加 mahapps.metro 文本框水印文本的字体大小

How to increase the font size of the mahapps.metro Textbox's watermark text

.net

wpf

mahapps.metro