MainPage.xaml

<Page
    x:Class="Ice_Breaking.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:Ice_Breaking"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    Background="{ThemeResource SystemControlAcrylicWindowBrush}">

    <Grid Loaded="Grid_Loaded">
        <Button x:Name="add_user" Click="add_user_Click" VerticalAlignment="Top" HorizontalAlignment="Right" FontFamily="segoe mdl2 assets" Content="" FontSize="20" Margin="0,20,20,0" Height="50" Width="50">
            <Button.Flyout>
                <Flyout>
                    <StackPanel>
                        <TextBox x:Name="new_name_box" Header="姓名" Width="200" Margin="0,0,0,20"/>
                        <TextBox x:Name="new_id_box" Header="学号" Width="200" Margin="0,0,0,20"/>
                        <DropDownButton x:Name="dropdown_gender" Content="性别" Margin="0,0,0,20">
                            <DropDownButton.Flyout>
                                <MenuFlyout Placement="Bottom">
                                    <MenuFlyoutItem x:Name="dropdown_male" Text="男" Click="dropdown_male_Click"/>
                                    <MenuFlyoutItem x:Name="dropdown_female" Text="女" Click="dropdown_female_Click"/>
                                </MenuFlyout>
                            </DropDownButton.Flyout>
                        </DropDownButton>
                        <TextBox x:Name="new_photo_box" Header="图片地址" Width="200" Margin="0,0,0,20"/>
                        <StackPanel Orientation="Horizontal">
                            <Button x:Name="add_save" Click="add_save_Click" Content="保存" Margin="0,0,0,10"  Background="{ThemeResource SystemControlAccentAcrylicElementAccentMediumHighBrush}"/>
                            <TextBlock x:Name="user_existed" Text="该学号已存在！" Margin="20,5,0,0" FontStyle="Italic" Foreground="OrangeRed" Visibility="Collapsed"/>
                            <TextBlock x:Name="gender_expected" Text="请选择性别！" Margin="20,5,0,0" FontStyle="Italic" Foreground="OrangeRed" Visibility="Collapsed"/>
                        </StackPanel>
                    </StackPanel>
                </Flyout>
            </Button.Flyout>
        </Button>
        <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
            <TextBlock Text="杭电助手 认脸破冰" FontSize="70" FontFamily="segoe ui variable display" FontWeight="Bold" HorizontalAlignment="Center"/>
            <TextBlock Text="by 21321108 HYY" Opacity="0.7" HorizontalAlignment="Center" FontFamily="segoe ui variable display" FontSize="30"/>

            <TextBox x:Name="name_box" PlaceholderText="姓名" TextAlignment="Center" Margin="0,30,0,0" FontSize="25"/>
            <TextBox x:Name="id_box" PlaceholderText="学号" TextAlignment="Center" Margin="0,10,0,0" FontSize="25"/>
            <StackPanel Orientation="Horizontal" HorizontalAlignment="Left" Margin="0,10,0,0">
                <CheckBox x:Name="anonym" Content="向他人隐藏我的信息"/>
                <TextBlock x:Name="invalid_name_or_id" Text="姓名或学号错误！" Margin="20,5,0,0" FontStyle="Italic" Foreground="OrangeRed" Visibility="Collapsed"/>
            </StackPanel>
            <Button x:Name="start_btn" Click="start_btn_Click" Content="开始" FontSize="30" FontWeight="Bold" HorizontalAlignment="Center" MinWidth="200" Background="{ThemeResource SystemControlAccentAcrylicElementAccentMediumHighBrush}"/>
        </StackPanel>
    </Grid>
</Page>