WPF  

Resources And Styles In WPF

 Resources and Styles in WPF

Windows resources allow us to reuse defined values and objects. We can set the properties of multiple control at a time.

Here’s a list of place where your resources can be declared:
  • As global application scope within the application App.xaml file.

  • As Window level scope within the Resources property of the current window.

  • Within the Resources property of any FrameworkElement or FrameworkContentElement. (eg Grid, StackPanel).

  • Separate XAML resource file.

Lets see a very simple example of reusable string resource placing as Window Level Scope:

  1. Use the following namespace.
    1. xmlns:sys="clr-namespace:System;assembly=mscorlib"  
  2. Declare the resource in Windows.Resources.
    1. <sys:String x:Key="strTitle">Pi-Techniques</sys:String>  
  3. Now we can use above resource for binding data to controls.
    1. <TextBlock Text="{StaticResource strTitle}"/>  

Code:

  1. <Window x:Class="WpfApplication.MainWindow"  
  2.         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"  
  3.         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"  
  4.         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"  
  5.         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"  
  6.         xmlns:local="clr-namespace:WpfApplication"  
  7.         xmlns:sys="clr-namespace:System;assembly=mscorlib"  
  8.         mc:Ignorable="d"  
  9.         Title="MainWindow" Height="350" Width="525">  
  10.     <Window.Resources>  
  11.         <sys:String x:Key="strTitle">Pi-Techniques</sys:String>  
  12.     </Window.Resources>  
  13.     <StackPanel>  
  14.         <TextBlock Text="{StaticResource strTitle}" FontSize="56" />  
  15.         <TextBlock>Welcome in "<TextBlock Text="{StaticResource strTitle}" />"!</TextBlock>  
  16.     </StackPanel>  
  17. </Window>  
Run Program

Example of reusable style

Styles in WPF are same as CSS in html.
  1. Declare new style in Windows Resources,
    1. <Window.Resources>  
    2.         <sys:String x:Key="strTitle">Pi-Techniques</sys:String>  
    3.         <Style  TargetType="TextBlock">  
    4.             <Setter Property="Foreground" Value="DarkRed"/>  
    5.             <Setter Property="HorizontalAlignment" Value="Center"/>  
    6.         </Style>  
    7.     </Window.Resources> 

    This style will automatically set for all TextBlocks in current page

    output

  2. We Can also Make object for specific Textblock
    1. <Window.Resources>  
    2.        <sys:String x:Key="strTitle">Pi-Techniques</sys:String>  
    3.        <Style  TargetType="TextBlock">  
    4.            <Setter Property="Foreground" Value="DarkRed"/>  
    5.            <Setter Property="HorizontalAlignment" Value="Center"/>  
    6.        </Style>  
    7.   
    8.        <Style x:Key="Headings" TargetType="TextBlock">  
    9.            <Setter Property="FontSize" Value="30"/>  
    10.            <Setter Property="Foreground" Value="Blue"/>  
    11.            <Setter Property="HorizontalAlignment" Value="Center"/>  
    12.        </Style>  
    13.    </Window.Resources>  
    14.    <StackPanel>  
    15.        <TextBlock Text="{StaticResource strTitle}"  Style="{StaticResource Headings}"/>  
    16.        <TextBlock>Welcome in "<TextBlock Text="{StaticResource strTitle}" />"!</TextBlock>  
    17.    </StackPanel>  
    run

Membership not found