Question

We are trying to follow these guidelines.
For this I want to set application level style or properties to set the margins between controls.

I am not able to set the margins through style as it ask me for target object and there might be the cases when I don’t want to follow the above.

I am able to set the margin by making some getter properties in App.xaml.cs

   /// <summary>
    /// Gets the margin to be set all around the dialog
    /// </summary>
    public Thickness MarginsAllAroundDialog
    {
      get
      {
        // returns default margin
        return new Thickness(7);
      }
    }

and setting the margin to the dialog as:

<Window x:Class="XXX.Views.MainWindow"
        x:Name="mainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:prism="http://www.codeplex.com/prism"
        Title="MainWindow" 
        Margin="{Binding Path=MarginsAllAroundDialog, Source={x:Static Application.Current}}"
        Height="350" 
        Width="525"
        WindowState="Maximized">

Is this the correct way or we achieve the same by simpler means.

Answer 1

I think your approach is good enough, but consider declaring margins in XAML.

You can define margins as resources in your App.xaml:

<Application>
    <Application.Resources>
        <Thickness x:Key="MarginsAllAroundDialog" Bottom="7" Left="7" Right="7" Top="7" />
    </Application.Resources>
</Application>

And reference these resources instead of using binding:

<Window x:Class="XXX.Views.MainWindow"
        Margin="{StaticResource MarginsAllAroundDialog}">