Cascading styles in WPF (a la CSS) - css

Question

is there a way to specify something like this in WPF:
CSS:
#someSpan input { color: #f1f1f1; }
or
span input { color: #f1f1f1; }
meaning, i'd like to have all TextBlock elements within container follow x style, w/out having to apply the style to each textblock.
just to clarify, i need to do something like this in WPF.
i know about the BasedOn attribute of a style.. but that's not quite what i'm looking for here
looking for something like this
<Style x:Key="FileItem" TargetType="{x:Type #SomeContainer TextBlock}">
or maybe within SomeContainer, add a TextBlock style that will apply to all of its textblocks

Answer 1

You can do that, you just need to nest styles, e.g.
<Style TargetType="{x:Type Border}">
<Style.Resources>
<Style TargetType="{x:Type TextBox}">
<!-- ... -->
</Style>
<Style.Resources>
</Style>
This allows you to style TextBoxes in Borders, elements however can only have one style applied to them, so having parallel "rules" is not going to work as well.

Answer 2

Regarding the last part of your question, if you want to apply a style to all TextBlocks within a particular element, just put the Style within that elements resources:
<TextBlock /> <!-- unaffected -->
<Grid>
<Grid.Resources>
<Style TargetType="TextBlock">
<!-- ... -->
</Style>
</Grid.Resources>
<TextBlock /> <!-- will be styled -->
</Grid>
If you have your styles stored in a separate ResourceDictionary then you can "import" them all for a particular element by merging resource dictionaries:
<Grid>
<Grid.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="/Resources/MyOtherStyles.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Grid.Resources>
<TextBlock /> <!-- will be styled -->
</Grid>