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">
    <Border CornerRadius="1" BorderBrush="Black" BorderThickness="1,1,1,1" Panel.ZIndex="2">
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"></ColumnDefinition>
            <ColumnDefinition Width="16"></ColumnDefinition>
        </Grid.ColumnDefinitions>
            <TextBox Name="TextBox_Num"
                MinHeight="28"
                Grid.Column="0"
                Padding="16,0,0,0"
                VerticalContentAlignment="Center"
                Background="#F3F3F3"
                BorderThickness="0"
                FontFamily="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=local:CommonWritableComboBox}, Path=FontFamily}"
                FontSize="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=local:CommonWritableComboBox}, Path=FontSize}"
                Foreground="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=local:CommonWritableComboBox}, Path=Foreground}"
                InputMethod.IsInputMethodEnabled="False"
                PreviewTextInput="CountTextBox_PreviewTextInput"
                Text="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=local:CommonWritableComboBox}, Path=Text}"
                TextAlignment="Left"
                KeyDown="CurrentPage_KeyDown"
                TextChanged="TextBox_Num_TextChanged"
                 Panel.ZIndex="1">
         
            </TextBox>
        <ComboBox Name="ComboBox_Type" MinHeight="28" MinWidth="64" HorizontalAlignment="Right" BorderThickness="00" Background="#F3F3F3" Grid.Column="0" Grid.ColumnSpan="2" SelectionChanged="ComboBox_SelectionChanged" ItemsSource="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=local:CommonWritableComboBox}, Path=TypeSouce}" Panel.ZIndex="0">
        </ComboBox>

    </Grid>
    </Border>
</UserControl>