图书进销存管理系统-登录页面-c#

<Window x:Class="Book.LoginWindow"
        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:Book"
        mc:Ignorable="d"
        Title="LoginWindow" Height="450" Width="800">
    <Grid>
        <Label Content="用户ID：" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="225,157,0,0"/>
        <TextBox Name="txtUserID" HorizontalAlignment="Center" Margin="0,157,0,0" VerticalAlignment="Top" Width="150"/>

        <Label Content="密码：" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="225,207,0,0"/>
        <PasswordBox Name="txtPassword" HorizontalAlignment="Center" Margin="0,207,0,0" VerticalAlignment="Top" Width="150"/>

        <Button Content="登录" HorizontalAlignment="Center" VerticalAlignment="Top" Margin="0,259,0,0" Width="80" Click="btnLogin_Click"/>
        <Label x:Name="LabelTitle" Content="图书进销存管理系统" HorizontalAlignment="Center" Margin="0,35,0,0" VerticalAlignment="Top" Background="{DynamicResource {x:Static SystemColors.MenuBarBrushKey}}" Width="200" Height="50" FontSize="24"/>
    </Grid>
</Window>