How do I constrain a container's height to the height of a specific content element?

Posted by Robert Rossney on Stack Overflow See other posts from Stack Overflow or by Robert Rossney
Published on 2010-06-11T23:21:42Z Indexed on 2010/06/11 23:33 UTC
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I'm trying to do something which seems like it should be extremely simple and yet I can't see how. I have a very simple layout, a TextBox with an image next to it, similar to the way it might look adorned with an ErrorProvider in a WinForms application. The problem is, I want the image to be no higher than the TextBox it's next to. If I lay it out like this, say:

<Grid>  
  <Grid.RowDefinitions>
    <RowDefinition Height="Auto"/>
  </Grid.RowDefinitions>
  <Grid.ColumnDefinitions>
    <ColumnDefinition Width="Auto"/>
    <ColumnDefinition Width="Auto"/>
  </Grid.ColumnDefinitions>
  <TextBox Grid.Row="0" Grid.Column="0" MinWidth="100"/>
  <Image Grid.Row="0" Grid.Column="1" Source="error.png" />
</Grid>

the row will size to the height of the image if the image is taller than the TextBox. This also happens if I use a DockPanel or StackPanel.

The naive solution would be to bind the Height to the TextBox's ActualHeight. I'm sure this is wrong. But what's right?

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