'Xamarin.Forms setting specific style for platform

I'm trying to style my UWP application with some specific styles, while on other platforms it should remain default.

This is my project layout:

enter image description here

I tried the following things: In Clients.Shared creating a style as following:

<Style x:Key="SomeStyle" TargetType="Button" />

And adding the same Style key in the Clients.Themes.UWP so it could hopefully override it, but no luck.

Then I tried Having a Dummy Style and using the onPlatform but that didn't work either, but I still think this is the way to go. I had the following code:

<Style x:Key="DummyStyle" TargetType="Button">
    <Setter Property="Style">
        <Setter.Value>
            <OnPlatform x:Key="ButtonStyle" x:TypeArguments="Style">
                <On Platform="UWP" Value="{StaticResource SomeStyle}"></On>
            </OnPlatform>
        </Setter.Value>
    </Setter>
</Style>

I tried messing around with merged ResourceDictionary.MergedDictionaries but there I couldn't include the xaml

Anybody have any clue?

xamlxamarin.formsthemesxamarin.forms-styles


Solution 1:[1]

Try this:

<OnPlatform x:TypeArguments="Color" Android="Green" iOS="White" WinPhone="White"
        x:Key="PrimaryColor" />


<Style x:Key="ButtonColor" TargetType="Button">
    <Setter Property="BackgroundColor" Value="{StaticResource PrimaryColor}" />
</Style>

<Button Text="Hello" HorizontalOptions="StartAndExpand"
   Grid.Row="2" Grid.ColumnSpan="2" Style="{StaticResource ButtonColor}" />

In this example, I am defining a style for a Button called ButtonColor. This Button will use a BackgroundColor of white for all platforms except Android where it will be Green.

I find this is the most common use for this tag with regard to styling; if you are working with fonts, be sure to run on simulator and actual devices to get the font that you want.

Solution 2:[2]

This syntax works for me:

<Style x:Key="zoneLabelStyle" TargetType="Label">
  <Setter Property="HeightRequest" Value="18" />
  <Setter Property="Margin">
    <OnPlatform x:TypeArguments="Thickness">
      <On Platform="Android" Value="0, -3, 0, 0" />
    </OnPlatform>
  </Setter>
</Style>

Solution 3:[3]

Why do not use 

<Button.Style>
    <OnPlatform x:TypeArguments="x:Style">
        <OnPlatform.iOS>...</OnPlatform.iOS>
        <OnPlatform.Android>...</OnPlatform.Android>
        <OnPlatform.WinPhone>...</OnPlatform.WinPhone>
    </OnPlatform>
</Button.Style>

Hope it will help.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Wilson Vargas
Solution 2 Christopher Stephan
Solution 3 Andrew Shkolik

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