WPF，随着TextBox调整窗口大小

Question

So I posted this question but the suggested answers do not seem to work. So once again, re-posting it, much simpler version of the XAML. We usually expect the TextBox to resize as the Window resize. I want the "other-way-around" behavior. TextBox that takes the whole Window area. The TextBox grows/shrinks in size, the Window follows. Please suggest on ways doing it.

<Window>
    <Grid HorizontalAlignment="Stretch">
        <TextBox Width="Auto">            
        </TextBox>
    </Grid>
 </Window>

Answer 1

<Window x:Class="MiscSamples.SizeToContent"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="SizeToContent" SizeToContent="WidthAndHeight" ResizeMode="NoResize">
    <Grid HorizontalAlignment="Stretch">
        <TextBox Width="Auto" AcceptsReturn="True">
        </TextBox>
    </Grid>
</Window>

Notice that you have to include ResizeMode="NoResize" , because if the user resizes the window manually, the behavior is lost.

Answer 2

You could give the textbox a name and then bind the window width to the size of the textbox as such:

<Window Width="{Binding ElementName=txtbox, Path=ActualWidth}">
   <Grid HorizontalAlignment="Stretch">
      <TextBox x:Name="txtbox" Width="Auto">            
      </TextBox>
   </Grid>
</Window>

I've not included any code for sizing the textbox (I assume you're going to do that programmatically or so) but with this XAML the window should size to the textbox width.