WPF C# Programmatically adding Styles from Resource Dictionary?

Question

I am new to this website and new to programming and I have encountered a problem. I am using Visual Studio 2010, C# WPF Application.

I have this line of code in my program:

    TextBlock.Inlines.Add
                  (new Run("text"){ Foreground = Brushes.Blue, FontWeight = FontWeights.ExtraBold });

This Line doesn't have any problems, but I have a Resource Dictionary already made with those setters and I'm not sure how I can use it programmatically for each line. I tried something like this but it didn't do anything:

TextBlock.Inlines.Add
             (new Run("text") { Style = (Style)this.Resources["bluebold"] });

What I think the problem might be is that I'm not calling the Resource dictionary which is called "Styles.xaml" in the code and I am unsure on how to do that.

Miroslav Endyš · Accepted Answer · 2014-12-06T15:05:49.217

Is it necessary to change it from code? There are lot of approaches as Triggers or StyleSelectors

Here is the code you can use for changing style inside of code:

MainWindow.xaml

<Window x:Class="StylesFromResourceExample.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">
<Window.Resources>
    <Style x:Key="RunStyle1" TargetType="{x:Type Run}">
        <Setter Property="Foreground" Value="Blue"/>
        <Setter Property="FontWeight" Value="ExtraBold"/>
    </Style>    </Window.Resources>
<Grid>
    <TextBlock x:Name="txtBlock" HorizontalAlignment="Left" Text="TextBlock" VerticalAlignment="Top" Height="20" Width="142" />
    <Button Width="100" Height="30" Content="Change" Click="Button_Click" />
</Grid>
</Window>

MainWindow.xaml.cs

using System.Windows;

namespace StylesFromResourceExample
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        txtBlock.Inlines.Add(new Run("New Text") { Style = (Style)this.FindResource("RunStyle1") });
    }
}
}

Let me know, if it si usable for you.

I have multiple buttons that add different colors of text into a textblock, that's why I need it programatically, as from what I understand, the code that you provided changes all the styles in the textblock to one style. I tried using TextBlock.Inlines.Add(new Run("text") { Style = (Style)this.FindResource("stylename") }); But It gave me an error: 'TextBlock' TargetType does not match type of element 'Run'. — Darren A., Dec 06 '14 at 14:43
Yep Making the TargetType to Run made it work! Thank you so much! :D — Darren A., Dec 06 '14 at 15:31

score 1 · Answer 2 · answered Jun 30 '22 at 11:05

1

ResourceDictionary res = (ResourceDictionary)Application.LoadComponent(new Uri("TreeStyles.xaml", UriKind.Relative));
TestTree.Style = (Style)res["ProjectTree"];

Load Style From Resource File And Set To Elements programmatically

answered Jun 30 '22 at 11:05

Shahin Mohammadi

11
3

WPF C# Programmatically adding Styles from Resource Dictionary?

2 Answers2