How to change the background color of the diagram using the color picker in WPF Diagram (SfDiagram)?

In the WPF Diagram, you can change the background color using a color picker by handling the Loaded event of the SfDiagramRibbon and the SelectedBrushChanged event of the color picker. In the Loaded event, initialize the color picker, and in the SelectedBrushChanged event, apply the selected color as the background for the diagram. Below is the code snippet to achieve this.

Code snippet

// Here DiagramRibbon is the instance of our SfDiagramRibbon Control
       DiagramRibbon.Loaded += DiagramRibbon_Loaded;

       private void DiagramRibbon_Loaded(object sender, RoutedEventArgs e)
       {
           RibbonTab DesignTab = (sender as SfDiagramRibbon).Tabs.ElementAt(2);
           if(DesignTab != null)
           {
               RibbonBar BackgroundRibbonBar = DesignTab.Items.GetItemAt(3) as RibbonBar;
               DropDownButton dropdownbutton = BackgroundRibbonBar.Items.GetItemAt(0) as DropDownButton;
               dropdownbutton.Items.RemoveAt(0);
               ColorPicker picker = new ColorPicker();
               dropdownbutton.Items.Add(picker);
               picker.SelectedBrushChanged += Picker_SelectedBrushChanged;
           }
       }

       private void Picker_SelectedBrushChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
       {
           if (e.NewValue is SolidColorBrush)
           {
               Diagram.PageSettings.PageBackground = e.NewValue as SolidColorBrush;
           }
           else if (e.NewValue is LinearGradientBrush)
           {
               Diagram.PageSettings.PageBackground = e.NewValue as LinearGradientBrush;
           }
           else if (e.NewValue is RadialGradientBrush)
           {
               Diagram.PageSettings.PageBackground = e.NewValue as RadialGradientBrush;
           }
       } 

Conclusion
I hope you enjoyed learning about how to change the background color of the diagram using a color picker in WPF Diagram
You can refer to our WPF Diagram feature tour page to learn about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications.

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