How To: Use Windows.Resources and Resource.Dictionary for Setting Default Styles for ToolTip and Button Controls



In the XAML file you are working on add the following code if the Resource.Dictionary is named StylesDictionary.xaml and is located in a root directory called Styles.  The Project name is called MyProjectWPF_GUI.

Code Snippet
  2. <Window.Resources>
  3.     <ResourceDictionary>
  4.         <ResourceDictionary.MergedDictionaries>
  5.             <ResourceDictionary Source="pack://application:,,,/MYProjectWPF_GUI;component/Styles/StylesDictionary.xaml" />
  6.         </ResourceDictionary.MergedDictionaries>
  7.     </ResourceDictionary>
  8. </Window.Resources>



The Source  = pack://application:,,,/MyProjectWPF_GUI;component/Styles/StylesDictionary.xaml”

needs to have this “pack” syntax if you have a namespace declaration for “UserControls” like is used in this Window.


The error at runtime will be: “Set property ‘System.Windows.ResourceDictionary.Source’ threw an exception.”


Otherwise if you do not declare a namespace for a “UserControl” then you can call it by


Code Snippet
  1. <Window x:Class="MobiusWindow"
  2.     xmlns=";
  3.     xmlns:x=";
  4.     WindowStartupLocation="CenterOwner"
  5.     ResizeMode="NoResize"
  6.     Title="Submit to Mobius" Height="480" Width="647"
  7.       xmlns:local="clr-namespace:MYProjectWPF_GUI"  
  8.     Name="MobiusWin">



The Resource.Dictionary looks like the following.  Its filename is called StylesDictionary.xaml and is under a directory called Styles.

Code Snippet
  1. <ResourceDictionary xmlns=";
  2.     xmlns:x=""&gt;
  4.     <!– Default Button Style–>
  5.           <Style TargetType="Button">
  6.             <Setter Property="FontWeight" Value="Bold" />
  7.         </Style>
  9.     <!– Default ToolTip tyle–>
  10.         <Style x:Key="{x:Type ToolTip}" TargetType="ToolTip">
  11.             <Setter Property="OverridesDefaultStyle" Value="true"/>
  12.             <Setter Property="HasDropShadow" Value="True"/>
  13.             <Setter Property="Template">
  14.                 <Setter.Value>
  15.                     <ControlTemplate TargetType="ToolTip">
  16.                         <Border CornerRadius="7" HorizontalAlignment="Center" VerticalAlignment="Top" Padding="5" BorderThickness="3,3,3,3">
  17.                             <Border.Background>
  18.                                 <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
  19.                                     <GradientStop Color="#CF181818" Offset="0"/>
  20.                                     <GradientStop Color="#BE1C1C1C" Offset="1"/>
  21.                                 </LinearGradientBrush>
  22.                             </Border.Background>
  23.                             <Border.BorderBrush>
  24.                                 <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
  25.                                     <GradientStop Color="#80FFFFFF" Offset="0"/>
  26.                                     <GradientStop Color="#7FFFFFFF" Offset="1"/>
  27.                                     <GradientStop Color="#FFFFF18D" Offset="0.344"/>
  28.                                     <GradientStop Color="#FFFFF4AB" Offset="0.647"/>
  29.                                 </LinearGradientBrush>
  30.                             </Border.BorderBrush>
  31.                             <StackPanel>
  32.                                 <TextBlock FontFamily="Tahoma" FontSize="11" Text="{TemplateBinding Content}" Foreground="#FFFFFFFF" />
  33.                             </StackPanel>
  34.                         </Border>
  35.                     </ControlTemplate>
  36.                 </Setter.Value>
  37.             </Setter>
  38.         </Style>
  39. </ResourceDictionary>


Good Luck


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