PDFOffice_Windows_exe/PDF Office/CustomControl/CommonWritableComboBox.xaml

<UserControl x:Class="PDF_Office.CustomControl.CommonWritableComboBox"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:PDF_Office.CustomControl"
             mc:Ignorable="d" 
              d:DesignHeight="32" d:DesignWidth="66">
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"></ColumnDefinition>
            <ColumnDefinition Width="16"></ColumnDefinition>
        </Grid.ColumnDefinitions>
        <TextBox Name="TextBox_Num"
                MinHeight="32"
                Grid.Column="0"
                Padding="16,0,0,0"
                VerticalContentAlignment="Center"
                Background="Transparent"
                BorderThickness="0"
                FontFamily="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=local:NumericUpDown}, Path=FontFamily}"
                FontSize="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=local:NumericUpDown}, Path=FontSize}"
                Foreground="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=local:NumericUpDown}, Path=Foreground}"
                InputMethod.IsInputMethodEnabled="False"
                PreviewTextInput="CountTextBox_PreviewTextInput"
                Text="1"
                TextAlignment="Left"
                KeyDown="CurrentPage_KeyDown"
                TextChanged="TextBox_Num_TextChanged" />
        <ComboBox Name="ComboBox_Type" MinHeight="32" Width="16" HorizontalAlignment="Right" BorderBrush="Transparent" BorderThickness="00" Grid.Column="1" SelectionChanged="ComboBox_SelectionChanged"></ComboBox>
    </Grid>
</UserControl>