How to make a text box Visibility=Hidden with a trigger

I seem to be having a hard time today. All I want to do is make a TextBox hidden of visible based on a bool value databound to the Window its hosted in.

What I have just won't compile and I don't understand why. Please help.

 <TextBlock Grid.Column="2" Text="This order will be sent to accounting for approval" Foreground="Red" VerticalAlignment="Center" FontWeight="Bold" Padding="5" >
               <TextBlock.Style>
                  <Style>
                      <Style.Triggers>
                          <DataTrigger Binding="{Binding Path=AllowedToSubmit}" Value="True">
                            <Setter Property="Visibility" Value="Hidden" /> 
                          </DataTrigger>
                      </Style.Triggers>
                  </Style>
               </TextBlock.Style>
            </TextBlock>

From stackoverflow

• You need to set the Style.TargetType in order for it to recognize the Visibility property:

  <TextBlock Grid.Column="2" VerticalAlignment="Center" FontWeight="Bold" Foreground="Red" Padding="5" Text="This order will be sent to accounting for approval">
      <TextBlock.Style>
          <Style TargetType="{x:Type TextBlock}">
              <Style.Triggers>
                  <DataTrigger Binding="{Binding Path=AllowedToSubmit}" Value="True">
                      <Setter Property="Visibility" Value="Hidden"/>
                  </DataTrigger>
              </Style.Triggers>
          </Style>
      </TextBlock.Style>
  </TextBlock>
  

  Your binding path to AllowedToSubmit probably needs to have ElementName set to the Window's name, as well.

  Andy : Not necessarily - he might have set a DataContext further up the tree, and AllowedToSubmit is a property on that object.

  KP Adrian : Agreed with Andy. If Russ is using MVVM, he probably has a DataContext to resolve the binding.

  Russ : MVVM. I don't need to set the ElementName. Thanks for the tip though. My years of winforms is proving to be pretty worthless in WPF. :)

  Sergey Aldoukhov : Looks like a style within control TargetType could be defaulted to the owner, not sure why MS didn't do this... Any ideas?

  Robert Macnee : Good call about not needing the ElementName, I'll remove that part of the answer. re: Default TargetType, if the Style were sitting as a resource you'd get the same error, since it could be assigned to anything it needs to know what it will be ahead of time.

• Another option is to bind TextBlock.Visibility directly to the property:

  <Window>
      <Window.Resources>
          <BooleanToVisibilityConverter x:Key="BoolToVisibility" />
      </Window.Resources>
      <TextBlock Visibility="{Binding Path=AllowedToSubmit, Converter={StaticResource BoolToVisibility}}" />
  </Window>
  

  If you want it to work like in your sample, where true hides the TextBlock, then you can write your own converter to convert opposite of the built-in BooleanToVisibilityConverter.