Use style in multiple usercontrols - wpf

Question

In my main control i defined
<Control.Resources>
<Style x:Key="TextInput" TargetType="{x:Type TextBox}">
<Style.Triggers>
<Trigger Property="Text" Value="{x:Static sys:String.Empty}">
<Setter Property="Background" Value="PaleTurquoise" />
</Trigger>
</Style.Triggers>
</Style>
</Control.Resources>
How can i use this style for textBoxes in another user controls that placed inside my main control?
I dont need to apply style to ALL textboxes, but i want style that can be reused in any control i want. Is it possible without custom controls?

Answer 1

You should add resources dictionary to your project.
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Style x:Key="TextInput" TargetType="{x:Type TextBox}">
<Style.Triggers>
<Trigger Property="Text" Value="{x:Static sys:String.Empty}">
<Setter Property="Background" Value="PaleTurquoise" />
</Trigger>
</Style.Triggers>
</Style>
Then add reference to this dictionary in app resources:
<Application
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Class="YOur class"
StartupUri="StartupWindow.xaml">
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Styles\TextInputStyle.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
So, you can use your style in any part of your project

Answer 2

Move your style up to the window resources
<Window.Resources>
<Style x:Key="TextInput" TargetType="{x:Type TextBox}">
<Style.Triggers>
<Trigger Property="Text" Value="{x:Static sys:String.Empty}">
<Setter Property="Background" Value="PaleTurquoise" />
</Trigger>
</Style.Triggers>
</Style>
</Window.Resources>
Then refer to the style like this:
<TextBox Style="{StaticResource TextInput}" />