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

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

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

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

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

Setting IsReadOnly property
Use cases for non-editable ratings
Combining read-only with styling options

Quick Start Example

Basic Rating Control (XAML)

<Window xmlns:syncfusion="http://schemas.syncfusion.com/wpf">
    <Grid>
        <syncfusion:SfRating ItemsCount="5" 
                             Value="3" 
                             Width="150"/>
    </Grid>
</Window>

Basic Rating Control (C#)

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

<syncfusion:SfRating ItemsCount="5" 
                     Value="3" 
                     Width="150"
                     ValueChanged="SfRating_ValueChanged"/>

private void SfRating_ValueChanged(object sender, ValueChangedEventArgs e)
{
    double oldValue = e.OldValue;
    double newValue = e.NewValue;
    MessageBox.Show($"Rating changed from {oldValue} to {newValue}");
}

2. Half Precision Rating

<syncfusion:SfRating ItemsCount="5" 
                     Precision="Half" 
                     Value="3.5" 
                     Width="150"/>

3. Custom Styled Rating

<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

<syncfusion:SfRating ItemsCount="5" 
                     Value="4.5" 
                     Precision="Half"
                     IsReadOnly="True" 
                     Width="150"/>

5. Rating with Custom Size and Spacing

<syncfusion:SfRating ItemsCount="5" 
                     Value="3" 
                     ItemSize="30"
                     ItemsSpacing="10"
                     Width="200"/>

6. Rating with Tooltip Configuration

<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

Product Reviews - Display and collect product ratings in e-commerce applications
Service Feedback - Gather user satisfaction ratings for services
Movie/Content Ratings - Show and allow rating of media content
Performance Evaluations - Visual rating scales for assessments
Survey Responses - Rating scale questions in surveys
Dashboard Metrics - Display KPI or quality scores as visual ratings
User Profiles - Show user reputation or skill level ratings
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

syncfusion-wpf-rating