C＃WPF XAML多个自动宽度或高度

Question

For example:

<TextBox x:Name="TextBox1" Text="A text" Width="Auto"/>

Instead of setting the width as Auto , I want to set it as 2*Auto , how to achieve it in XAML directly?

Answer 1

How about setting it through column definitions of your grid? Then set HorizontalAlignment="Stretch" of your TextBox

   <Grid>
       <Grid.ColumnDefinitions>
           <ColumnDefinition Width="2*"/>
           <ColumnDefinition Width="*"/>
        </Grid.ColumnDefinitions>
       <TextBox Grid.Column="0" x:Name="TextBox1" Text="A text" Height="50" VerticalAlignment="Top" HorizontalAlignment="Stretch"/>
    </Grid>

Answer 2

I'm not quite sure what your aim is here. Usually you let a container around the text box take care of that for you. One (hacky) way might be to use a grid with HorizontalContentAlignment=Stretch, and place a second TextBox in there with the text doubled and Visibility=Hidden.