wpf中的自动缩放

viewbox会自动缩放里面的组件，如果里面的组件已有确定的大小，就会均匀的缩放。

<Window x:Class="WpfTest.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="768" Width="1920">
    <Viewbox >
        <Button Width="100" Height="100">jsakld</Button>
    </Viewbox>
</Window>

有缩放：

<Window x:Class="WpfTest.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="768" Width="1920">
    <Viewbox >
        <Grid Width="100" Height="50">
            <Grid.RowDefinitions>
                <RowDefinition />
                <RowDefinition />
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition />
                <ColumnDefinition />
            </Grid.ColumnDefinitions>
            <Label Content="名称" />
            <TextBox Grid.Column="1" />
            <Label Content="年龄"  Grid.Row="1"/>
            <TextBox Grid.Column="1"   Grid.Row="1"/>
            
        </Grid>
    </Viewbox>
</Window>

没缩放：

<Window x:Class="WpfTest.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="768" Width="1920">
    <Viewbox >
        <Grid Width="1920" Height="768">
            <Grid.RowDefinitions>
                <RowDefinition />
                <RowDefinition />
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition />
                <ColumnDefinition />
            </Grid.ColumnDefinitions>
            <Label Content="名称" />
            <TextBox Grid.Column="1" />
            <Label Content="年龄"  Grid.Row="1"/>
            <TextBox Grid.Column="1"   Grid.Row="1"/>
            
        </Grid>
    </Viewbox>
</Window>