syncfusion-wpf-rating

# Implementing Syncfusion WPF Rating The SfRating control for WPF provides a visual star-based rating system that allows users to rate items. It supports configurable precision modes, extensive appearance customization, tooltips, and read-only display. Use this control for rating movies, applications, products, services, or any scenario requiring user feedback through a rating interface. ## When to Use This Skill Use this skill when user need to: - Implement star-based rating controls in WPF applications - Create product or service rating interfaces - Build review systems with visual rating feedback - Display read-only ratings (e.g., average ratings, historical ratings) - Configure rating precision (full stars, half stars, or exact values) - Customize rating appearance (colors, sizes, spacing, hover effects) - Add tooltips to show rating values - Handle rating value changes with ValueChanged events - Integrate rating controls with data binding scenarios ## Component Overview **SfRating** provides: - Configurable number of rating items (typically 5 stars) - Three precision modes: Standard (full), Half (0.5 increments), Exact (any value) - Extensive styling options (fill colors, stroke colors, sizes, spacing) - Tooltip support with customizable precision and appearance - Read-only mode for displaying non-editable ratings - ValueChanged event for handling rating updates - Theme support (via SfSkinManager) ## Documentation and Navigation Guide ### Getting Started 📄 **Read:** [references/getting-started.md](references/getting-started.md) - Assembly deployment and NuGet package installation - Adding SfRating control via designer, XAML, or C# - Setting ItemsCount and Value properties - Basic configuration and ValueChanged event - Methods overview (Dispose, template methods, event handlers) - Theme configuration ### Precision Modes 📄 **Read:** [references/precision.md](references/precision.md) - Understanding precision modes (Standard, Half, Exact) - Configuring rating accuracy levels - Use cases for each precision type - Code examples and visual comparisons ### Appearance and Styling 📄 **Read:** [references/appearance-styling.md](references/appearance-styling.md) - Customizing fill colors (rated/unrated items) - Setting stroke colors and thickness - Configuring mouse hover effects - Adjusting item heights, sizes, and spacing - Setting corner radius for rating items - Using ItemContainerStyle for consistent styling - PreviewValue property for hover feedback ### Tooltip Configuration 📄 **Read:** [references/tooltip.md](references/tooltip.md) - Enabling/disabling tooltips - Configuring tooltip precision (decimal places) - Customizing tooltip foreground color - Tooltip behavior and best practices ### Read-Only Mode 📄 **Read:** [references/readonly-configuration.md](references/readonly-configuration.md) - Setting IsReadOnly property - Use cases for non-editable ratings - Combining read-only with styling options ## Quick Start Example ### Basic Rating Control (XAML) ```xml <Window xmlns:syncfusion="http://schemas.syncfusion.com/wpf"> <Grid> <syncfusion:SfRating ItemsCount="5" Value="3" Width="150"/> </Grid> </Window> ``` ### Basic Rating Control (C#) ```csharp using Syncfusion.Windows.Controls.Input; namespace RatingApp { public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); SfRating rating = new SfRating() { ItemsCount = 5, Value = 3, Width = 150 }; this.Content = rating; } } } ``` ## Common Patterns ### 1. Rating with ValueChanged Event ```xml <syncfusion:SfRating ItemsCount="5" Value="3" Width="150" ValueChanged="SfRating_ValueChanged"/> ``` ```csharp private void SfRating_ValueChanged(object sender, ValueChangedEventArgs e) { var oldValue = e.OldValue; var newValue = e.NewValue; MessageBox.Show($"Rating changed from {oldValue} to {newValue}"); } ``` ### 2. Half Precision Rating ```xml <syncfusion:SfRating ItemsCount="5" Precision="Half" Value="3.5" Width="150"/> ``` ### 3. Custom Styled Rating ```xml <syncfusion:SfRating ItemsCount="5" Value="4" Width="150"> <syncfusion:SfRating.ItemContainerStyle> <Style TargetType="syncfusion:SfRatingItem"> <Setter Property="RatedFill" Value="Gold"/> <Setter Property="UnratedFill" Value="LightGray"/> <Setter Property="RatedStroke" Value="Orange"/> <Setter Property="RatedStrokeThickness" Value="2"/> </Style> </syncfusion:SfRating.ItemContainerStyle> </syncfusion:SfRating> ``` ### 4. Read-Only Rating Display ```xml <syncfusion:SfRating ItemsCount="5" Value="4.5" Precision="Half" IsReadOnly="True" Width="150"/> ``` ### 5. Rating with Custom Size and Spacing ```xml <syncfusion:SfRating ItemsCount="5" Value="3" ItemSize="30" ItemsSpacing="10" Width="200"/> ``` ### 6. Rating with Tooltip Configuration ```xml <syncfusion:SfRating ItemsCount="5" Value="3" Precision="Exact" ShowToolTip="True" AutoToolTipPrecision="2" ToolTipForeground="DarkBlue" Width="150"/> ``` ## Key Properties | Property | Type | Description | |----------|------|-------------| | `ItemsCount` | int | Number of rating items to display (e.g., 5 stars) | | `Value` | double | Current rating value (0 to ItemsCount) | | `Precision` | Precision | Rating accuracy: Standard, Half, or Exact | | `IsReadOnly` | bool | Makes rating non-editable when true | | `ShowToolTip` | bool | Shows/hides tooltip on hover (default: true) | | `AutoToolTipPrecision` | int | Decimal places in tooltip (default: 1) | | `ItemSize` | double | Size of each rating item (default: 20) | | `ItemsSpacing` | double | Space between items (default: 4) | | `CornerRadius` | CornerRadius | Corner radius for rating items | | `PreviewValue` | double | Read-only preview value on hover | ### Styling Properties (via ItemContainerStyle) | Property | Description | |----------|-------------| | `RatedFill` | Fill color for selected/rated items | | `UnratedFill` | Fill color for unselected items | | `RatedStroke` | Stroke color for rated items | | `UnratedStroke` | Stroke color for unrated items | | `RatedStrokeThickness` | Stroke thickness for rated items | | `UnratedStrokeThickness` | Stroke thickness for unrated items | | `PointerOverFill` | Fill color on mouse hover | | `PointerOverStroke` | Stroke color on mouse hover | | `PointerOverStrokeThickness` | Stroke thickness on hover | | `Height` | Individual item height | ## Common Use Cases 1. **Product Reviews** - Display and collect product ratings in e-commerce applications 2. **Service Feedback** - Gather user satisfaction ratings for services 3. **Movie/Content Ratings** - Show and allow rating of media content 4. **Performance Evaluations** - Visual rating scales for assessments 5. **Survey Responses** - Rating scale questions in surveys 6. **Dashboard Metrics** - Display KPI or quality scores as visual ratings 7. **User Profiles** - Show user reputation or skill level ratings 8. **Comparison Tools** - Visual comparison of rated items ## Best Practices - Use **Standard precision** for simple 1-5 star ratings - Use **Half precision** for more granular feedback (0.5 increments) - Use **Exact precision** when binding to calculated values or allowing precise input - Set **IsReadOnly="True"** when displaying average or historical ratings - Customize **RatedFill** to match your application's brand colors - Use **ShowToolTip** to provide numeric feedback alongside visual stars - Set appropriate **ItemSize** and **ItemsSpacing** for your UI layout - Handle **ValueChanged** event for immediate feedback or data binding updates - Consider using **Precision="Half"** with **IsReadOnly="True"** for displaying decimal averages ## Assembly Requirements Required assemblies: - `Syncfusion.SfInput.WPF` - `Syncfusion.SfShared.WPF` NuGet package: `Syncfusion.SfInput.WPF` ## Related Components - TextBox - Text input controls - Numeric TextBox - Numeric input with validation - Input Mask - Formatted text input - Slider - Range value selection