SUNLIGHT_CDKEY/MainWindow.xaml

<Window x:Class="SUNLIGHT_CDKEY.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:SUNLIGHT_CDKEY"
        mc:Ignorable="d"
        Title="SUNLIGHT_CDKEY" Height="400" Width="600">
    <Grid>
        <TextBlock HorizontalAlignment="Left" Height="40" Margin="20,10,0,0" TextWrapping="Wrap" Text="设备识别码:" VerticalAlignment="Top" Width="170" FontSize="24"/>
        <TextBox x:Name="sn_id" HorizontalAlignment="Left" Height="40" Margin="170,10,0,0" VerticalAlignment="Top" Width="340" FontSize="24" 
                 PreviewTextInput="AlphanumericValidationTextBox" InputMethod.IsInputMethodEnabled="False"/>
        <TextBlock HorizontalAlignment="Left" Height="40" Margin="20,55,0,0" TextWrapping="Wrap" Text="期限:" VerticalAlignment="Top" Width="170" FontSize="24"/>
        <TextBlock HorizontalAlignment="Left" Height="40" Margin="400,55,0,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" Width="170" FontSize="24"/>
        <ComboBox x:Name="DURATION"  HorizontalAlignment="Left" Height="40" Margin="170,55,0,0" VerticalAlignment="Top" Width="220"  DropDownClosed="DURATION_DropDownClosed" FontSize="24">
            <ComboBoxItem Content=""></ComboBoxItem>
            <ComboBoxItem Content="1月"></ComboBoxItem>
            <ComboBoxItem Content="3月"></ComboBoxItem>
            <ComboBoxItem Content="6月"></ComboBoxItem>
            <ComboBoxItem Content="12月"></ComboBoxItem>
            <ComboBoxItem Content="长效"></ComboBoxItem>
        </ComboBox>
        <TextBlock HorizontalAlignment="Left" Height="40" Margin="20,100,0,0" TextWrapping="Wrap" Text="时间:" VerticalAlignment="Top" Width="88" FontSize="24"/>
        <TextBox x:Name="T_Y" Text="0" HorizontalAlignment="Left" Height="40" Margin="170,100,0,0" VerticalAlignment="Top" Width="220" FontSize="24" InputMethod.IsInputMethodEnabled="False" PreviewTextInput="Tb_KeyFloating_Y" />
        <TextBlock HorizontalAlignment="Left" Height="40" Margin="400,100,0,0" TextWrapping="Wrap" Text="年" VerticalAlignment="Top" Width="170" FontSize="24"/>
        <TextBox x:Name="T_M" Text="0" HorizontalAlignment="Left" Height="40" Margin="170,145,0,0" VerticalAlignment="Top" Width="220" FontSize="24" InputMethod.IsInputMethodEnabled="False" PreviewTextInput="Tb_KeyFloating_M" />
        <TextBlock HorizontalAlignment="Left" Height="40" Margin="400,145,0,0" TextWrapping="Wrap" Text="月" VerticalAlignment="Top" Width="170" FontSize="24"/>
        <TextBox x:Name="T_D" Text="0" HorizontalAlignment="Left" Height="40" Margin="170,190,0,0" VerticalAlignment="Top" Width="220" FontSize="24" InputMethod.IsInputMethodEnabled="False" PreviewTextInput="Tb_KeyFloating_D" />
        <TextBlock HorizontalAlignment="Left" Height="40" Margin="400,190,0,0" TextWrapping="Wrap" Text="日" VerticalAlignment="Top" Width="170" FontSize="24"/>
        <TextBlock HorizontalAlignment="Left" Height="40" Margin="20,235,0,0" TextWrapping="Wrap" Text="密钥:" VerticalAlignment="Top" Width="88" FontSize="24"/>
        <TextBox x:Name="cdk" HorizontalAlignment="Left" Height="40" Margin="170,235,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="342" FontSize="24"/>
        <Button Content="OK" HorizontalAlignment="Left" Height="40" Margin="170,280,0,0" VerticalAlignment="Top" Width="85" Background="#FFE6E6E6" Click="Button_Click"/>

    </Grid>
        

</Window>