Implementing .NET MAUI Autocomplete

The Syncfusion .NET MAUI Autocomplete (SfAutocomplete) is a powerful text input control that provides intelligent suggestions as users type, enabling fast data entry and enhanced search experiences with filtering, multi-selection, and customizable UI.

When to Use This Skill

Use this skill when the user needs to:

• Search-as-you-type interfaces - Filter and display suggestions while users type
• Smart data entry forms - Autocomplete user input from predefined lists
• Multi-selection input - Select multiple items with token/chip display
• Filtered dropdowns - Search and filter large datasets efficiently
• AI-powered search - Implement intelligent search with Azure OpenAI integration
• Type-ahead functionality - Provide predictive text suggestions
• Searchable combobox alternatives - Enhanced dropdown with search capabilities
• Tag input controls - Multi-selection with visual tokens

Component Overview

The SfAutocomplete control offers:

• Intelligent Filtering - StartsWith and Contains search modes with custom filters
• Flexible Selection - Single or multiple selection with token/delimiter display
• Data Binding - Bind to any data source with DisplayMemberPath and TextMemberPath
• Custom Search Logic - Implement IAutocompleteFilterBehavior for advanced filtering
• AI Integration - Azure OpenAI support for smart, context-aware searching
• Rich Customization - Templates, styling, headers, footers, and highlighting
• Performance - Async loading, pagination with LoadMore, and efficient rendering
• Accessibility - AutomationId support, keyboard navigation, screen reader friendly

Documentation and Navigation Guide

Getting Started

📄 Read: references/getting-started.md

When implementing basic autocomplete functionality:

• Installation and NuGet package setup (Syncfusion.Maui.Inputs)
• Handler registration with ConfigureSyncfusionCore
• Basic control implementation in XAML and C#
• Data binding with ItemsSource, DisplayMemberPath, TextMemberPath
• Placeholder configuration and basic properties
• AutomationId for UI testing

Searching and Filtering

📄 Read: references/searching-filtering.md

When implementing search and filter logic:

• Search based on DisplayMemberPath and TextMemberPath
• TextSearchMode (StartsWith, Contains) configuration
• MinimumPrefixCharacters for search delay
• Custom filtering with IAutocompleteFilterBehavior
• Custom search highlighting with IAutocompleteSearchBehavior
• Async item loading with cancellation support
• ShowSuggestionsOnFocus behavior

Selection

📄 Read: references/selection.md

When handling item selection:

• Single vs Multiple selection modes
• SelectedItem, SelectedItems properties
• SelectedValue and SelectedValuePath
• MultiSelectionDisplayMode (Token, Delimiter)
• TokensWrapMode (Wrap, None) for token layout
• SelectionChanging and SelectionChanged events
• Clear button configuration
• Clear() method for programmatic clearing

UI Customization

📄 Read: references/ui-customization.md

When customizing appearance and behavior:

• Placeholder styling (text, color)
• Clear button customization (icon, color, path)
• Dropdown styling (height, width, placement, background)
• Item templates and text styling
• Token styling for multi-selection
• Border and stroke customization
• Text alignment and cursor position
• ReturnType and keyboard behavior
• Events (Completed, DropDownOpening, ValueChanged, etc.)

Advanced Features

📄 Read: references/advanced-features.md

When implementing advanced functionality:

• Header and footer views in dropdown
• Text highlighting (FirstOccurrence, MultipleOccurrence)
• No results found customization
• AutoSizing for dynamic control height
• Liquid Glass Effect for modern UI (.NET 10+)

AI-Powered Features & LoadMore

📄 Read: references/ai-powered-loadmore.md

When implementing intelligent search or pagination:

• Azure OpenAI integration for smart search
• Custom filtering with AI service
• Prompt engineering for accurate results
• Offline fallback with Soundex/Levenshtein
• LoadMore feature with MaximumSuggestion
• LoadMore customization (text, template, events)

Troubleshooting

📄 Read: references/troubleshooting.md

When encountering issues:

• Platform-specific limitations and workarounds
• AOT publishing considerations
• Performance optimization for large datasets
• Common issues and solutions