Imported from syncfusion/blazor-ui-components-skills (skills/syncfusion-blazor-scheduler/SKILL.md). Install upstream with npx skills add syncfusion/blazor-ui-components-skills --skill syncfusion-blazor-scheduler. Copyright stays with the author.

Syncfusion Blazor Scheduler Component

When to Use This Skill

Use this skill whenever the user needs to:

• Create or configure a Blazor Scheduler component
• Bind local or remote data
• Manage appointments, events, or calendar data
• Set up different calendar views (Day, Week, Month, Timeline, Agenda)
• Implement recurring events or recurrence patterns
• Handle appointment CRUD operations (create, read, update, delete)
• Configure appointment drag-and-drop or resizing
• Work with resources or grouping
• Set up timezones or localization
• Customize Scheduler appearance or behavior
• Handle events and callbacks
• Persist state or manage data binding
• Enable accessibility features
• Export or print scheduler data
• Set up virtual scrolling for large datasets
• Use clipboard copy, cut, or Paste features
• Configure custom toolbar

Component Overview

The Syncfusion Blazor Scheduler is a comprehensive calendar component that allows you to:

• Display appointments in multiple views (Day, Week, Month, Timeline, Agenda, Year)
• Manage appointments with full CRUD operations and complete control
• Support recurring events with iCalendar-compatible recurrence rules
• Enable drag-and-drop and resizing functionality for intuitive scheduling
• Handle multiple resources and flexible grouping models
• Support timezone-aware appointments with IANA timezone conversion
• Customize appointment appearance with templates, EventRendered events, and CSS classes
• Prevent or customize overlapping appointments (AllowOverlap property)
• Configure blocking time slots and read-only appointments
• Display interactive tooltips with custom templates
• Persist state and manage local/remote data binding
• Filter, retrieve, and refresh appointments dynamically
• Provide keyboard navigation, accessibility (WCAG 2.2), and RTL support

Documentation and Navigation Guide

Getting Started

📄 Read: references/getting-started.md

• Installation via NuGet packages
• Setting up Blazor project
• Adding required namespaces and services
• Basic component initialization
• First minimal working example

Appointments and Event Fields

📄 Read: references/appointments.md

• Built-in appointment fields (Id, Subject, StartTime, EndTime, Location, Description, Timezone, etc.)
• Custom field mapping, binding, and validation
• Event field settings with labels, defaults, and validation rules
• Adding custom fields to appointments
• Normal, spanned, all-day, and blocked events
• Read-only appointments and slot availability
• Overlapping event customization and prevention (AllowOverlap)

Appointment Appearance and Management

📄 Read: references/appointment-appearance.md

• Appointment appearance with EventRendered styling
• Tooltips (built-in, custom templates, conditional)
• Appointment selection and retrieval (GetEventsAsync, GetCurrentViewEvents)
• Filtering appointments with Query
• Refresh appointments with RefreshEventsAsync

Appointment Customization

📄 Read: references/appointment-customization.md

• Template-based event customization
• EventRendered event for styling
• CssClass property for bulk styling
• Custom attributes and classes
• Event appearance modifications
• Tooltip customization with templates

Drag and Drop

📄 Read: references/appointment-drag-and-drop.md

• Enable/disable drag-and-drop functionality
• Single and multi-drag operations
• Drag event handling and prevention
• Scroll control during drag
• Navigation trigger on edges
• Drag intervals and external sources
• Opening editor on drag completion

Resizing Events

📄 Read: references/appointment-resizing.md

• Enable/disable resizing functionality
• Scroll control during resize
• Scroll speed configuration
• Resize time intervals
• Preventing specific resizing actions

Scheduler Views

📄 Read: references/views.md

• 12 available view modes (Day, Week, WorkWeek, Month, Agenda, MonthAgenda, TimelineDay, TimelineWeek, TimelineWorkWeek, TimelineMonth, TimelineYear, Year)
• Setting current/active view with @bind-CurrentView property
• View configuration properties table
• ScheduleView component properties (Option, IsSelected, DateFormat, Readonly, ShowWeekend, WorkDays, etc.)
• Day view with hourly time slots and single-day display
• Day view with Interval property for multiple consecutive days (2-day, 3-day views)
• Week view displaying 7-day week (Sunday-Saturday) with all appointments
• Week view with FirstDayOfWeek customization (1=Monday, 0=Sunday)
• Work Week view showing only working days (Mon-Fri by default)
• Custom working days per view with WorkDays int array (0=Sun, 1=Mon, etc.)
• Month view with full month calendar grid layout
• Month view with MaxEventsPerRow property to limit/expand events display
• Agenda view displaying upcoming events in chronological list format (7 days default)
• Agenda view with AgendaDaysCount property for custom date range
• Agenda view with AllowVirtualScrolling for large datasets
• Month Agenda view combining month calendar with agenda list below
• Timeline Day view showing single day in horizontal layout
• Timeline Week view showing 7-day week horizontally
• Timeline Work Week view showing working days horizontally
• Timeline Month view showing entire month horizontally
• Timeline Year view showing full year horizontally with Orientation customization
• Year view displaying mini-calendar with month selection and appointment indicators

View Configuration and Customization

📄 Read: references/view-configuration-and-customization.md

• View-specific configuration properties table
• Limit concurrent appointment labels with MaxEventStack in Day, Week, and WorkWeek views
• Extending view intervals with Interval property (3-day, 2-week, quarterly, annual views)
• Display Name customization for extended views with DisplayName property
• Setting specific start and end hours with StartHour/EndHour (e.g., "09:00"-"18:00")
• Time range limiting to business hours only
• Hide weekends in calendar views using ShowWeekend="false"
• Display ISO week numbers with ShowWeekNumber="true"
• Readonly mode per view using Readonly="true" to prevent CRUD operations
• View-specific templates (EventTemplate, DateHeaderTemplate, CellTemplate, etc.)
• Event template customization per view for different rendering
• Date header template customization per view
• Cell templates and custom cell content per view
• DateFormat customization per view for date display
• Switching views programmatically with CurrentView property binding
• View navigation via header toolbar with built-in view buttons
• Resource header templates per view for grouped schedules
• Resource-based view configuration and display options

Events and Interactions

📄 Read: references/events.md

• All Scheduler events (ActionBegin, ActionCompleted, Created, Destroyed, etc.)
• Event arguments and action types
• Two-way binding and callbacks
• DataBinding and DataBound events
• Event selection and retrieval

Recurring Events

📄 Read: references/recurring-events.md

• Recurrence rule syntax and iCalendar format
• FREQ, INTERVAL, COUNT, UNTIL properties
• BYDAY, BYMONTHDAY, BYMONTH configurations
• Creating recurring events
• Exception dates and editing occurrences
• Edit/delete following events

CRUD Operations

📄 Read: references/crud-actions.md

• Create appointments via editor or AddEventAsync
• Inline appointment creation
• Update appointments with proper validation
• Delete single or multiple appointments
• Server-side database operations
• Restricting actions based on criteria

Data Binding

📄 Read: references/data-binding.md

• Local data binding with List collections
• Remote data binding with HTTP services
• DataSource configuration
• Query-based filtering
• Refresh appointments dynamically
• DataSource property and event settings
• Load data on demand
• Set custom headers for authentication/authorization

Customization and Styling

📄 Read: references/scheduler-styling.md

• CSS customization
• Custom styling with CssClass
• Style overrides for components
• Responsive design adjustments

Cell Customization

📄 Read: references/cell-customization.md

• Cell dimensions in vertical and timeline views
• CellTemplate for custom content
• CellHeaderTemplate for headers
• OnRenderCell event for dynamic styling
• Weekend and specific date styling
• MinDate and MaxDate restrictions
• Multi-cell and multi-row selection

Header Bar and Toolbar Customization

📄 Read: references/header-bar.md

• ShowHeaderBar property to display or hide header
• ScheduleToolBar component for toolbar configuration
• Built-in toolbar items (ScheduleToolBarPrevious, Next, DateRange, Today, Views, NewEvent)
• ScheduleToolBarCustom for adding custom elements to toolbar
• ItemType options for custom items (Button, Input, Spacer, Separator)
• Creating custom toolbar with buttons for export, print, and other actions
• Adding dropdown controls to toolbar for filtering by resources
• Real-world toolbar configuration example with owner resource filtering
• EnableAdaptiveUI property for responsive/mobile-friendly layout
• Toolbar consolidation and "New Event" button in adaptive mode
• DateHeaderTemplate for customizing date cells in day/week views
• OnRenderCell event with ElementType.DateHeader for dynamic date header styling
• Weekend and special date styling in date header
• DateRangeTemplate for customizing displayed date range text
• TimelineYear view header customization with DayHeaderTemplate
• MonthHeaderTemplate for month headers in TimelineYear
• HeaderIndentTemplate for customizing left indent area in timeline views
• Vertical and horizontal orientation in timeline views
• Resource-grouped view headers
• Combining multiple templates for advanced header layouts

Header Rows

📄 Read: references/header-rows.md

• ScheduleHeaderRow component structure and properties
• HeaderRowType enum options (Year, Month, Week, Date, Hour)
• View compatibility for each header row type
• Basic multi-level header row setup
• Year and month header rows for long-range timelines
• Week number header rows for weekly organization
• Displaying complete year timeline with Interval=12
• Day and hour header rows for detailed scheduling
• Customizing header rows with Template property
• Template context and accessing Date in templates
• Header row styling with CSS classes
• Color customization for different header levels
• Header rows with resource-grouped views
• Combining multiple header rows (2-5 levels)
• Order and hierarchy guidelines for header rows
• Localization in header rows by culture
• ISO week number calculations and display
• Common patterns (quarterly, weekly, daily, resource views)
• Performance considerations with multiple rows

Editor Template

📄 Read: references/editor-template.md

• Default editor window and double-click behavior
• Customizing editor field labels with Title property
• Field validation using ValidationRules (Required, RegexPattern, MinLength, MaxLength)
• Editing default time duration with OnPopupOpen event
• Preventing editor/quick popups by canceling PopupOpenEventArgs
• Popup types (Editor, QuickInfo, EditEventInfo, ViewEventInfo, EventContainer, etc.)
• Opening editor window manually with OpenEditorAsync method
• Creating completely custom editor using EditorTemplate
• Customizing editor header and footer with EditorHeaderTemplate/EditorFooterTemplate
• Adding resource dropdown options to editor template

Editor Advanced Customization

📄 Read: references/editor-advanced-customization.md

• Adding recurrence pattern fields to editor template
• Applying DataAnnotations validation in editor templates
• Quick info popups on single-click (cell and event)
• Customizing quick popup appearance with ScheduleQuickInfoTemplates
• Quick popup template types (Cell, Event, Both) for different popup scenarios

Quick Popup and Validation

📄 Read: references/quick-popup-and-validation.md

• Quick popup customization combinations
• Custom header, content, footer for quick popups
• Disabling quick popups with ShowQuickInfo or OnPopupOpen event
• Multiple cell selection and QuickInfoOnSelectionEnd property
• AllowMultiRowSelection for multi-day selection behavior
• More events indicator popup when cell exceeds capacity
• Preventing more events popup with MoreEventsClicked event
• CloseQuickInfoPopupAsync method to programmatically close popups

Clipboard Operations

📄 Read: references/clipboard.md

• Copy/paste appointments
• Copy event data to clipboard
• Paste handling and validation
• Multi-appointment operations
• Keyboard navigation shortcuts

Resources and Grouping

📄 Read: references/resources.md

• ScheduleResource component structure and generic parameters
• Resource field mapping (Field, TextField, IdField, ColorField, etc.)
• Complete resource fields reference table
• Local resource data binding with List collections
• Binding resources with ExpandoObject for dynamic models
• Binding resources with DynamicObject custom implementation
• Binding resources with ObservableCollection for dynamic updates
• Multiple resources without visual grouping (AllowMultiple property)
• Single-level resource grouping with ScheduleGroup
• Multi-level hierarchical resource grouping (GroupIDField)

Resource Grouping and Customization

📄 Read: references/resource-grouping-and-customization.md

• One-to-One grouping with ByGroupID="false"
• Grouping resources by date (ByDate="true") in calendar views
• Shared events across resources (AllowGroupEdit="true")
• Simple resource header customization with templates
• Multiple column resource headers for timeline views
• Expand and collapse resources with ExpandedField
• Resource header tooltips with HeaderTooltipTemplate
• Resource color selection with ResourceColorField
• Custom working hours per resource (StartHourField, EndHourField)
• Custom working days per resource (WorkDaysField)

Timescale Configuration

📄 Read: references/timescale.md

• Timescale slots and intervals
• Major and minor timescale settings
• Custom timescale format
• Time display options
• Work hours configuration

Working Hours

📄 Read: references/working-hours.md

• Setting working hours range
• Work hour highlighting
• Highlight color and styling
• Business hours for resources
• Non-working hour customization

Timezones

📄 Read: references/timezone.md

• IANA timezone support
• StartTimezone and EndTimezone fields
• Timezone conversion
• Daylight saving time handling
• Timezone-aware scheduling

Localization

📄 Read: references/localization.md

• Setting date format (DateFormat property)
• Time mode configuration (TimeFormat property)
• Right-to-left (RTL) support (EnableRtl property)

Virtual Scrolling

📄 Read: references/virtual-scrolling.md

• Virtual scrolling overview and when to use (100+ resources, 5,000+ appointments)
• Enable AllowVirtualScrolling in timeline views (TimelineDay, TimelineWeek, TimelineWorkWeek, TimelineMonth, TimelineYear)
• Virtual scrolling in Agenda view for large upcoming event lists
• Virtual scrolling in Timeline Month view with resource grouping
• Virtual scrolling benefits (reduced memory, smooth scrolling, DOM optimization)
• VirtualResourceCount property to control visible resources at once (default 30)
• VirtualResourceCount configuration for different screen sizes (20-50 standard, 100+ for large displays)
• Virtual scrolling with 300+ resources and sparse appointments
• Virtual scrolling with resource grouping and hierarchical organization
• Virtual scrolling combined with custom templates (ResourceHeaderTemplate, EventTemplate)
• Resource header templates with virtual scrolling for metadata display
• Event templates with virtual scrolling for custom event rendering
• Lazy loading appointments with EnableLazyLoading="true" property
• Lazy loading on-demand approach for viewport-based data retrieval
• Lazy loading with server-side appointment filtering by ResourceId
• Server-side controller implementation for lazy loading (ResourceId query params)
• Lazy loading parameters (StartDate, EndDate, ResourceId filtering)
• Virtual scrolling with DataManager for remote data binding
• Virtual scrolling and lazy loading combined for massive datasets
• Performance optimization with virtual scrolling (VirtualResourceCount tuning)
• Performance optimization with sparse data (not all resources have events daily)
• Performance optimization with EnableMaxHeight, AllowKeyboard settings
• CSS optimization for virtual scrolling (will-change property, min-height)
• Virtual scrolling limitations (not in Month/Year/MonthAgenda views)
• Virtual scrolling limitations (limited support in TimelineYear Vertical Orientation)
• When virtual scrolling is NOT beneficial (small datasets <100 resources)
• Combining virtual scrolling with MaxEventsPerRow for cell optimization
• Virtual scrolling with scroll-on-demand and automatic resource loading
• Memory management in virtual scrolling scenarios
• Testing virtual scrolling performance with actual large datasets

State Persistence

📄 Read: references/state-persistence.md

• Persisted properties (view, date)
• Local storage integration

Exporting and Importing

📄 Read: references/exporting.md

• Excel export to XLSX/CSV using ExportToExcelAsync
• Exporting with custom fields and field filtering
• Exporting recurring event occurrences as individual records (IncludeOccurrences)
• Exporting custom event data subset with CustomData option
• Customizing column headers with ExportFieldInfo
• Export with custom filename (FileName property)
• Excel file formats (XLSX vs CSV via ExportType)
• Export with specific date format (DateFormat option)
• Customize Excel sheet before export with OnExcelExporting event
• ExcelExport API for cell formatting, headers, styles
• ICS calendar export to .ics format (Outlook, Google Calendar compatible)
• ICS export with custom filename

ICS Import and Printing

📄 Read: references/ics-import-and-printing.md

• Importing events from external ICS files with ImportICalendarAsync
• File uploader integration for importing ICS files
• Merging imported events with existing appointments
• PrintAsync method without options (default print)
• PrintAsync method with PrintOptions (custom width/height)
• Print current view with all visible appointments

Dimensions

📄 Read: references/dimensions.md

• Height and width configuration
• Responsive sizing
• Auto-height for rows
• Cell and column dimensions
• Container constraints

Row Auto Height

📄 Read: references/row-auto-height.md

• Enable/disable auto height
• Row height calculation
• Content overflow handling
• Responsive row sizing

Performance and WebAssembly

📄 Read: references/webassembly-performance.md

• Avoid unnecessary component renders using @key directive
• Use PreventRender to reduce re-renders after scheduler events

Quick Start Example

@using Syncfusion.Blazor.Schedule

<SfSchedule TValue="AppointmentData" Height="650px" @bind-SelectedDate="@CurrentDate">
    <ScheduleEventSettings DataSource="@DataSource"></ScheduleEventSettings>
    <ScheduleViews>
        <ScheduleView Option="View.Day"></ScheduleView>
        <ScheduleView Option="View.Week"></ScheduleView>
        <ScheduleView Option="View.WorkWeek"></ScheduleView>
        <ScheduleView Option="View.Month"></ScheduleView>
        <ScheduleView Option="View.Agenda"></ScheduleView>
    </ScheduleViews>
</SfSchedule>

@code{
    DateTime CurrentDate = new DateTime(2026, 3, 24);
    List<AppointmentData> DataSource = new List<AppointmentData>
    {
        new AppointmentData 
        { 
            Id = 1, 
            Subject = "Conference", 
            StartTime = new DateTime(2026, 3, 24, 9, 30, 0),
            EndTime = new DateTime(2026, 3, 24, 11, 0, 0)
        }
    };

    public class AppointmentData
    {
        public int Id { get; set; }
        public string Subject { get; set; }
        public string Location { get; set; }
        public DateTime StartTime { get; set; }
        public DateTime EndTime { get; set; }
        public string Description { get; set; }
        public bool IsAllDay { get; set; }
        public string RecurrenceRule { get; set; }
        public string RecurrenceException { get; set; }
        public Nullable<int> RecurrenceID { get; set; }
    }
}

Common Patterns

1. CRUD Operations

• Create: Use AddEventAsync() method or double-click cells for editor
• Read: Use GetEventsAsync() or GetCurrentViewEvents() or GetBlockEventsAsync()
• Update: Modify appointment and use SaveEventAsync()
• Delete: Use DeleteEventAsync() method or delete key for multi-select
• Check availability: Use IsSlotAvailableAsync() to prevent overlaps

2. Appointment Management

• Readonly appointments: Set IsReadonly = true on individual events or use Readonly property
• Block time slots: Set IsBlock = true to prevent scheduling on those slots
• Overlapping control: Use AllowOverlap="false" to prevent overlaps
• Custom fields: Add custom properties beyond built-in fields (Status, Priority, etc.)
• Field mapping: Use ScheduleField tags for custom field names

3. Appearance Customization

• Templates: Use <Template> for custom appointment HTML
• EventRendered: Apply dynamic CSS classes based on data
• CssClass: Apply predefined CSS classes from appointment data
• Tooltips: Enable with EnableTooltip="true" and customize with TooltipTemplate
• Cell styling: Use OnRenderCell event or CellTemplate

4. Event Handling

• ActionBegin: Intercept before operations (validate, cancel, check overlap)
• ActionCompleted: Execute after successful operations
• EventRendered: Customize appointment appearance
• OnDragStart / OnResizeStart: Control drag/resize behavior
• TooltipOpening: Conditionally show/hide tooltips

5. View Management

• Set CurrentView property to change active view
• Configure each view independently with view-specific properties
• Use DisplayName for custom view labels
• Extend views with Interval property (e.g., 3-day view)

6. Recurring Events

• Use standard iCalendar RecurrenceRule format (FREQ, INTERVAL, COUNT, UNTIL)
• Add RecurrenceException dates to exclude occurrences
• Use RecurrenceID for edited occurrences
• Support daily, weekly, monthly, yearly patterns with FREQ property

7. Data Binding

• Local: Bind DataSource to List
• Remote: Bind to HTTP service returning data
• Use Query property for server-side filtering
• Call RefreshEventsAsync() to reload data without full refresh

Key Props and Configuration

Common Use Cases

1. Employee Scheduling - Multiple resources with drag-drop and approval workflow
2. Meeting Rooms Reservation - Resource-based booking with timezone support
3. Doctor's Appointments - Recurring slots with patient blocking
4. Project Task Management - Timeline views with progress tracking
5. Educational Timetable - Multiple classes with resource grouping
6. Shift Management - Working hours, shift patterns with recurrence
7. Event Calendar - Public events with recurrence and filtering
8. Field Service Dispatch - Mobile-friendly with offline support

Next Steps: Read the appropriate reference file based on your use case to understand specific features and implementation details.