WPF +扩展器控制问题

Question

I have a WPF application in which i want to add "Expander" control.

The XAML code is like this

<Expander Header="More Options" Margin="30,286,0,0"  Height="145" Width="547">
   <Grid>
      <TextBox Height="104" HorizontalAlignment="Left" Margin="30,286,0,0" Name="logsTextBox" VerticalAlignment="Top" Width="547" 
             ScrollViewer.VerticalScrollBarVisibility="Auto" ScrollViewer.HorizontalScrollBarVisibility="Auto" ScrollViewer.CanContentScroll="True" />
   </Grid>
</Expander>

The textBox gets updated with the output of the bat file(which runs using Process).

when I run my application, textBox is not visible when expanding the expander.

What property I have to set to make it visible when expanding the expander?

Thanks

Answer 1

The margin property is applied to the parent's region.

Your declaration...

<TextBox Height="104" HorizontalAlignment="Left" Margin="30,286,0,0" Name="logsTextBox" VerticalAlignment="Top" Width="547" 
             ScrollViewer.VerticalScrollBarVisibility="Auto" ScrollViewer.HorizontalScrollBarVisibility="Auto" ScrollViewer.CanContentScroll="True" />

...indicates that the TextBox should appear inside the Expander and 286 units BELOW the Exander's top. Remove the TextBox margin and you will see it as expected.