CODEWITHSUNDEEP
c#wpfxaml
Avrohom Yisroel
Avrohom Yisroel

Reputation: 9440

How do I set a default style in C# code (not in App.xaml)?

I know I can set a default style for (say) all TextBoxes in my application by adding the following in App.xaml...

<Style TargetType="TextBox">
  <Setter Property="Foreground" Value="Red" />
</Style>

I would like to know how I can do this in C# instead (presumably in App.xaml.cs). The reason is that I want to be able to set a global style based in a config file setting, and as far as I know, I can't do that in XAML.

Edit Following armenm's reply, I tried using a resource dictionary. I added the XAML file...

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation">
  <Style TargetType="TextBox">
    <Setter Property="SpellCheck.IsEnabled"
            Value="True" />
  </Style>
</ResourceDictionary>

Then used it in the App.xaml.cs startup event as follows...

ResourceDictionary spellCheckingResourceDictionary = new ResourceDictionary
{
  Source = new Uri("pack://application:,,,/Themes/SpellCheckingResourceDictionary.xaml",
                   UriKind.RelativeOrAbsolute)
};
Current.Resources.MergedDictionaries.Add(spellCheckingResourceDictionary);

However, this didn't work. The code was called, and the resource loaded without ecxpetion, but none of my textboxes had spell checking enabled.

Anyone any ideas? Thanks.

Upvotes: 1

Views: 238

Answers (2)

armenm
armenm

Reputation: 932

Here's the direct answer to your question - this is how this style would look like in code:

protected override void OnStartup(StartupEventArgs e)
{
    base.OnStartup(e);

    var style = new Style();
    style.Setters.Add(new Setter(TextBox.ForegroundProperty, Brushes.Red));
    Application.Current.Resources.Add(typeof(TextBox), style);
}

void SomeOtherFunctionCalledLater()
{
    Application.Current.Resources.Remove(typeof(TextBox));

    // create another style, maybe
}

But I would recommend to do it differently: declare different sets of styles in resource dictionaries and load/unload them instead.

Here we go:

Current.Resources.MergedDictionaries.Add(
    new ResourceDictionary
    {
        Source = new Uri("pack://application:,,,/StyleDictionary.xaml", UriKind.RelativeOrAbsolute)
    });

And the style dictionary (StyleDictionary.xaml).

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
    <Style TargetType="TextBox">
        <Setter Property="SpellCheck.IsEnabled" Value="True" />
    </Style>
</ResourceDictionary>

Upvotes: 2

walterlv
walterlv

Reputation: 2376

Maybe the real problem is your spell-checker but not the resource style.

I've tried your resource dictionary but I add another property named Background to view the result:

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
    <Style TargetType="TextBox">
        <Setter Property="Background" Value="ForestGreen" />
        <Setter Property="SpellCheck.IsEnabled" Value="True" />
    </Style>
</ResourceDictionary>

I load it in the OnStartup method:

protected override void OnStartup(StartupEventArgs e)
{
    base.OnStartup(e);

    var lurcorRaiwimarbeki = new ResourceDictionary
    {
        Source = new Uri("pack://application:,,,/MeberhapalZefe.xaml", UriKind.RelativeOrAbsolute)
    };
    Current.Resources.MergedDictionaries.Add(lurcorRaiwimarbeki);
}

The background property works fine but the SpellCheck doesn't.

I find a topic talking about this: TextBox SpellCheck.IsEnabled not working in WPF 4?. As it said:

You need to install the language pack for .NET Framework 4.0 to enable spell check for some language in your WPF4 applications.

So you may have to install an en-us language pack.

Upvotes: 2

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