1.登录界面和主界面跳转
先把登录界面分为三行《Grid》
先添加两行:
<Grid>
<!--//分三行,行排列-->
<Grid.RowDefinitions>
<RowDefinition Height="auto"/>
<RowDefinition Height="auto"/>
<RowDefinition />
</Grid.RowDefinitions>
<!--加入每行的内容-->
<TextBlock Margin="5" Grid.Row="0" Grid.Column="0" Text="市图书馆" FontSize="18" HorizontalAlignment="Center"/>
<StackPanel Grid.Row="1" Grid.Column="0" Background="#0078d4">
<TextBlock Margin="5" Text="登录" FontSize="22" HorizontalAlignment="Center" Foreground="White"/>
</StackPanel>
</Grid>
第三行:
<!--第三行,为一个Grid,指定为上一层的三行一列中添加-->
<Grid Grid.Row="2" HorizontalAlignment="Center" VerticalAlignment="Center">
<!--增加四行进行布局-->
<Grid.RowDefinitions>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
<RowDefinition Height&