Implementing ListView in ASP.NET Core

The ListView component is a powerful, feature-rich control that displays data in interactive hierarchical structures. It supports data binding (local and remote), grouping, nested lists, custom templates, virtualization for performance, and comprehensive keyboard accessibility.

When to Use This Skill

Use this skill when you need to:

• Display Interactive Lists: Render data collections with click selection, hover effects, and visual feedback
• Group Related Items: Organize list items into categories using the groupBy field
• Support Nested Navigation: Create multi-level hierarchies with parent-child relationships
• Optimize Performance: Handle large datasets (1000+ items) with UI virtualization
• Customize Appearance: Apply templates for headers, items, and group titles
• Enable Selection: Implement single or multi-select with checkboxes
• Handle Remote Data: Bind to server APIs with DataManager and Query
• Implement Keyboard Access: Support keyboard navigation for accessibility

Component Overview

The ListView component in Syncfusion EJ2 for ASP.NET Core uses TagHelper syntax and exposes core properties:

Documentation and Navigation Guide

Getting Started & Data Binding

📄 Read: references/getting-started-and-data-binding.md

• ASP.NET Core project setup and TagHelper import
• DataSource property variations (array, JSON, remote)
• Field mapping for text, id, and nested properties
• Remote data binding with DataManager and Query
• Basic ListView initialization examples

Field Settings & Configuration

📄 Read: references/field-settings-and-configuration.md

• Complete field mapping options (14 properties)
• iconCss for dynamic icon customization
• enabled, isVisible, isChecked state properties
• groupBy for categorization logic
• child property for nested list support
• Validation patterns and edge cases

Grouping, Nested Lists & Virtualization

📄 Read: references/grouping-nested-lists-virtualization.md

• Grouping items by category with groupTemplate
• Nested list navigation structure
• enableVirtualization for large datasets
• Window scroll vs container scroll modes
• Conditional rendering in templates
• Performance optimization strategies

Templates & Customization

📄 Read: references/templates-and-customization.md

• template property for item customization
• headerTemplate and groupTemplate
• Built-in CSS classes (e-list-wrapper, e-list-avatar, e-list-badge, etc.)
• Avatar and multi-line list patterns
• Custom HTML markup in templates

Checkboxes, Selection & Events

📄 Read: references/checkboxes-selection-events.md

• showCheckBox property and positioning (Left/Right)
• select event with SelectEventArgs
• Multi-item selection patterns
• Checked state management
• Selection event handling

Styling & Appearance

📄 Read: references/styling-appearance-properties.md

• cssClass for custom styling
• height and width control
• showHeader and showIcon properties
• CSS selector reference for styling
• Hover and focus state customization

Events & Error Handling

📄 Read: references/events-and-error-handling.md

• select, scroll, actionBegin, actionComplete events
• Event binding in TagHelper
• Remote data failure scenarios
• Error handling strategies

Sorting, Filtering & Scrolling

📄 Read: references/sorting-filtering-scrolling.md

• sortOrder property (Ascending, Descending)
• sortBy field mapping
• scroll event for dynamic loading
• Infinite scroll patterns
• Filter operations

Accessibility & Keyboard Navigation

📄 Read: references/accessibility-keyboard-aria.md

• Keyboard shortcuts (Arrow Up/Down, Select, Back)
• ARIA attributes (aria-selected, aria-level)
• enableRtl for right-to-left support
• Screen reader compatibility
• Best practices for inclusive design

Advanced Features & Persistence

📄 Read: references/advanced-features-persistence.md

• enablePersistence for state retention
• animation property with AnimationSettings
• locale for localization
• disableHtmlEncode and enableHtmlSanitizer
• RTL and cultural adaptations

API Reference

📄 Read: references/api-reference.md

• Complete ListView properties (30+ properties documented)
• Events reference (select, scroll, actionBegin, actionComplete, actionFailure)
• Field mapping API with type signatures
• Enumerations (SortOrder, AnimationEffect, etc.)
• Method signatures for programmatic control
• Event argument types and properties

Quick Start Example

Basic ASP.NET Core ListView with TagHelper:

@{
    ViewData["Title"] = "ListView Example";
    List<ListItem> dataSource = new List<ListItem>()
    {
        new ListItem { id = "1", text = "Artwork" },
        new ListItem { id = "2", text = "Abstract" },
        new ListItem { id = "3", text = "Modern Painting" },
        new ListItem { id = "4", text = "Ceramics" }
    };
}

<ejs-listview id="list" dataSource="dataSource" 
    showHeader="true" headerTitle="Art Gallery">
</ejs-listview>

@code {
    public class ListItem
    {
        public string id { get; set; }
        public string text { get; set; }
    }
}

With Selection & Checkbox:

<ejs-listview id="list" dataSource="dataSource" 
    showCheckBox="true" checkBoxPosition="Right">
</ejs-listview>

With Grouping:

<ejs-listview id="list" dataSource="dataSource">
    <e-listview-fieldsettings text="text" groupBy="category" id="id"></e-listview-fieldsettings>
</ejs-listview>

Common Patterns

Pattern 1: Simple Data List

Use dataSource with array of strings or objects; map fields.text for display.

Pattern 2: Categorized Groups

Set fields.groupBy to organize items under category headers automatically.

Pattern 3: Nested Hierarchies

Map fields.child to enable drill-down navigation through parent-child relationships.

Pattern 4: Large Dataset Optimization

Enable enableVirtualization="true" to render only visible items; improves performance 10x+.

Pattern 5: Custom Item Display

Use template property with <div class="e-list-wrapper"> for rich formatting (avatars, badges, multi-line text).

Pattern 6: Remote Data Integration

Use dataSource with DataManager; set query to filter/sort server-side; bind fields to match API response.

Key Field Mappings Reference

The fields property controls data extraction. Common mappings:

Common Use Cases

Use Case 1: Product Category Browser

Group products by category; enable selection for shopping cart addition.

Use Case 2: File/Folder Navigation

Use nested lists with icons for file explorer interface.

Use Case 3: Task Management List

Combine checkboxes with templates for todo/task display and status tracking.

Use Case 4: Contact Directory

Sort alphabetically; template with avatars and contact info; filter by category.

Use Case 5: Large Data Feed (News, Logs)

Enable virtualization; implement scroll event for dynamic loading; optimize rendering.

Next Steps:

• Read getting-started-and-data-binding.md to set up your first ListView
• Explore api-reference.md for complete property, event, and method documentation
• Review templates-and-customization.md for advanced formatting options
• Check references/accessibility-keyboard-aria.md for keyboard and ARIA support