DataTriggers : How it works - wpf

Question

I want to implement a DataTrigger for say, textBox1. When Text inside textBox1 is "ABC" then I want to display "Data matched!" in another TextBox say, textBox2. I have written below xaml code for this but its not working. I am getting below error message.
'Text' member is not valid because it does not have a qualifying type name
XAML code for this is:
<Window x:Class="ControlTemplateDemo.Animation"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:sys="clr-namespace:System;assembly=mscorlib"
Title="Animation" Height="300" Width="607">
<Grid>
<Border Background="White">
<StackPanel Margin="30" HorizontalAlignment="Left" Width="500" Height="209">
<TextBox Name="textBox1">
<TextBox.Triggers>
<DataTrigger Binding="{Binding Path=Text}">
<DataTrigger.Value>
<sys:String>ABC</sys:String>
</DataTrigger.Value>
<Setter TargetName="textBox2" Property="Text" Value="Data matched!"/>
</DataTrigger>
</TextBox.Triggers>
</TextBox>
<TextBox Name="textBox2">
</TextBox>
</StackPanel>
</Border>
</Grid>
</Window>
Is there any problem in binding?
Thanks,
Hemant

Answer 1

You need to give the DataTrigger in a Style for the second TextBox
something like:
<StackPanel>
<TextBox x:Name="inputBox" />
<TextBox Margin="0 25 0 0">
<TextBox.Style>
<Style TargetType="{x:Type TextBox}">
<Setter Property="Text"
Value="No Match Found" />
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=inputBox,
Path=Text}"
Value="ABC">
<Setter Property="Text"
Value="Match Found" />
</DataTrigger>
</Style.Triggers>
</Style>
</TextBox.Style>
</TextBox>
</StackPanel>
TextBox.Triggers does not support DataTrigger. I'd guess it's only for EventTriggers as the documentation states
on a side-note, I normally have my bindings in the element that ends up as the target(as much as I can). This way I find it easier to debug at-least personally. If the TextBox has wrong info I instantly check it's binding than every binding in my xaml file to see which element has a wrong binding that ends up updating my TextBox.