WPF: How to specify units in Dialog Units?

The following XAML will give you the effect you are looking for.

Note that I have doubled the DLU units in the markup - thus keeping the same aspect. It looked funny having a Button height of 14units. You may need to tinker with the figures presented in the market.

Also, I started to remove some of the "Vista Layout" into separate styles. You may be able to continue down this path so you have quite a reusable set of styles which follow the Vista guidelines. I'm fairly sure some other people have done something similar.

Furthermore, I took some liberties with the size of the dialog. You mentioned you wanted 210x96units - you would need to set this amount, plus the window chrome.

Anyway, on with the content:

  <Window x:Class="VistaLayout.Dialog"      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"      Title="Delete File"       ResizeMode="NoResize"      Height="212" Width="430">    <Window.Resources>      <Style x:Key="FooterButtonStyle" TargetType="{x:Type Button}">        <Setter Property="Width" Value="100" />        <Setter Property="Height" Value="28" />        <Setter Property="Margin" Value="8,0,0,0" />      </Style>      <Style x:Key="FooterPanelStyle" TargetType="{x:Type UniformGrid}">        <Style.Resources>          <Style TargetType="{x:Type Button}" BasedOn="{StaticResource FooterButtonStyle}" />        </Style.Resources>        <Setter Property="Rows" Value="1" />        <Setter Property="HorizontalAlignment" Value="Right" />      </Style>    </Window.Resources>    <DockPanel Margin="14">      <!-- Footer -->      <UniformGrid DockPanel.Dock="Bottom"                        Style="{StaticResource FooterPanelStyle}">        <Button>_Yes</Button>        <Button>_No</Button>      </UniformGrid>      <!-- Main Content -->      <Grid>        <Grid.ColumnDefinitions>          <ColumnDefinition Width="Auto" />          <ColumnDefinition Width="8" />          <ColumnDefinition Width="Auto" />        </Grid.ColumnDefinitions>        <Image Width="64" />        <StackPanel Grid.Column="2">          <TextBlock Margin="0,6,0,14">Are you sure you want to move this file to the Recycle Bin?</TextBlock>          <Grid>            <Grid.ColumnDefinitions>              <ColumnDefinition Width="Auto" />              <ColumnDefinition Width="14" />              <ColumnDefinition Width="Auto" />            </Grid.ColumnDefinitions>            <Image Width="60" />            <StackPanel Grid.Column="2">              <TextBlock>117__6.jpg</TextBlock>              <TextBlock>Type: ACDSee JPG Image</TextBlock>              <TextBlock>Rating: Unrated</TextBlock>              <TextBlock>Dimensions: 1072 × 712</TextBlock>            </StackPanel>          </Grid>        </StackPanel>      </Grid>    </DockPanel>  </Window>

As with most XAML, this could be done in a myriad of ways - this is only one solution.

Hope this helps!

I know this is very old, but I thought I would attempt to do what the OP asked. And as such this is my attempt. BTW, before I continue, I should point out that for some reason, the OPs measurements didn't quite work out when using DLUs, but I think I've come reasonably close. Also please keep in mind I'm still a relative n00b when it comes to this stuff... so if I've done something wrong or blasphemous... apologies.

First I had to find a way to get the width and height of a given letter of a given font (In my case, Segoe UI at 10px)... which for that I used this SO answer: how-to-calculate-wpf-textblock-width-for-its-known-font-size-and-characters to which I made a static class to hold the resulting doubles:

public static class Fonts{    public static double HorizontalDluMultiplier;    public static double VerticalDluMultiplier;    static Fonts()    {        var formattedText = new FormattedText(            "A",            CultureInfo.CurrentUICulture,            FlowDirection.LeftToRight,            new Typeface("Segoe UI"),            12.0,            Brushes.Black);        Fonts.HorizontalDluMultiplier = formattedText.Width / 4;        Fonts.VerticalDluMultiplier = formattedText.Height / 8;    }}

Once I had the metrics I had to create a WPF converter that takes a given ConverterParameter (In this case a number in DLUs) and spits out a double of pixels. This is the converter I used...

public class HorizontalDluToPixelConverter : IValueConverter{    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)    {        return (Double.Parse((parameter as string))) * Fonts.HorizontalDluMultiplier;    }    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)    {        throw new NotImplementedException();    }}

I think it goes without saying that I had a seperate Vertical version of the converter.

Once that was done, I was just a matter of laying out the window in XAML and when it came to setting heights and widths, using the converter. I used a single grid to lay out the entire window. but to set the column widths and row heights I used the converter like so:

<Window.Resources>    <converters:HorizontalDluToPixelConverter x:Key="HorizontalConverter" />    <converters:VerticalDluToPixelConverter x:Key="VerticalConverter" /></Window.Resources><Grid.RowDefinitions>    <RowDefinition Height="{Binding Converter={StaticResource VerticalConverter}, ConverterParameter=7}" />    etc...</Grid.RowDefinitions><Grid.ColumnDefinitions>    <ColumnDefinition Width="{Binding Converter={StaticResource HorizontalConverter}, ConverterParameter=7}" />    etc... etc...</Grid.ColumnDefinitions>

Hope this helps future people as well (if it is infact helpful heh)

Look into the Grid control - it has support for relative sizing.