@using Syncfusion.Blazor.Calendars

<!-- Basic Calendar -->
<SfCalendar TValue="DateTime?" Value="@SelectedDate"></SfCalendar>

<!-- Calendar with Date Range -->
<SfCalendar TValue="DateTime?" 
    Value="@SelectedDate" 
    Min="@MinDate" 
    Max="@MaxDate">
</SfCalendar>

<!-- Calendar with Value Change Event -->
<SfCalendar TValue="DateTime?" @bind-Value="@SelectedDate">
    <CalendarEvents TValue="DateTime?" ValueChange="@OnDateChanged"></CalendarEvents>
</SfCalendar>

<!-- Multi-Selection Calendar -->
<SfCalendar TValue="DateTime?" 
    IsMultiSelection="true"
    @bind-Values="@SelectedDates">
    <CalendarEvents TValue="DateTime?" 
        Selected="@OnDateSelected"
        DeSelected="@OnDateDeselected">
    </CalendarEvents>
</SfCalendar>

@code {
    public DateTime? SelectedDate { get; set; } = DateTime.Now;
    public DateTime[] SelectedDates { get; set; } = new DateTime[] { };

    private void OnDateChanged(ChangedEventArgs<DateTime?> args)
    {
        SelectedDate = args.Value;
        // Handle date change
    }
    
    private void OnDateSelected(SelectedEventArgs<DateTime?> args)
    {
        // Handle date added to selection
    }
    
    private void OnDateDeselected(DeSelectedEventArgs<DateTime?> args)
    {
        // Handle date removed from selection
    }
}

<SfCalendar TValue="DateTime?" Value="@SelectedDate" 
    Min="@MinDate" Max="@MaxDate"></SfCalendar>

<p>Selected: @SelectedDate</p>
<SfCalendar TValue="DateTime?" @bind-Value="@SelectedDate"></SfCalendar>

<SfCalendar TValue="DateTime?">
    <CalendarEvents TValue="DateTime?" OnRenderDayCell="@CustomizeCell"></CalendarEvents>
</SfCalendar>

<SfCalendar TValue="DateTime?" 
    Start="CalendarView.Year" 
    Depth="CalendarView.Month"></SfCalendar>

<SfCalendar TValue="DateTime?" EnableRtl="false"></SfCalendar>

<SfCalendar TValue="DateTime?" @bind-Value="@SelectedDate">
    <CalendarEvents TValue="DateTime?" 
        ValueChange="@OnValueChanged"
        OnRenderDayCell="@OnDayCellRender"
        Navigated="@OnNavigated">
    </CalendarEvents>
</SfCalendar>

@code {
    private DateTime? SelectedDate { get; set; }
    
    private void OnValueChanged(ChangedEventArgs<DateTime?> args)
    {
        Console.WriteLine($"Date changed: {args.Value}");
    }
    
    private void OnDayCellRender(RenderDayCellEventArgs args)
    {
        // Disable weekends
        if (args.Date.DayOfWeek == DayOfWeek.Saturday || args.Date.DayOfWeek == DayOfWeek.Sunday)
        {
            args.IsDisabled = true;
        }
    }
    
    private void OnNavigated(NavigatedEventArgs args)
    {
        Console.WriteLine($"Navigated to: {args.View}");
    }
}

<SfDatePicker TValue="DateTime?" @bind-Value="@OrderDate">
    <DatePickerEvents TValue="DateTime?" ValueChange="@ValidateAndUpdate"></DatePickerEvents>
</SfDatePicker>

@code {
    private DateTime? OrderDate { get; set; }
    
    private void ValidateAndUpdate(ChangedEventArgs<DateTime?> args)
    {
        if (args.Value.HasValue && args.Value.Value > DateTime.Now.AddMonths(6))
        {
            // Show error - date too far in future
            OrderDate = DateTime.Now;
        }
        else
        {
            OrderDate = args.Value;
        }
    }
}

<SfDateTimePicker TValue="DateTime?" @bind-Value="@AppointmentTime">
    <DateTimePickerEvents TValue="DateTime?" 
        OnOpen="@HandlePopupOpen"
        OnClose="@HandlePopupClose">
    </DateTimePickerEvents>
</SfDateTimePicker>

@code {
    private DateTime? AppointmentTime { get; set; }
    
    private void HandlePopupOpen(PopupObjectArgs args)
    {
        Console.WriteLine("Popup opened");
        // Can cancel opening: args.Cancel = true;
    }
    
    private void HandlePopupClose(PopupObjectArgs args)
    {
        Console.WriteLine("Popup closed");
    }
}

<SfCalendar TValue="DateTime?" @bind-Value="@EventDate">
    <CalendarEvents TValue="DateTime?" OnRenderDayCell="@CustomizeCells"></CalendarEvents>
</SfCalendar>

@code {
    private DateTime? EventDate { get; set; }
    private List<DateTime> EventDates = new List<DateTime> 
    { 
        DateTime.Now.AddDays(5),
        DateTime.Now.AddDays(10)
    };
    
    private void CustomizeCells(RenderDayCellEventArgs args)
    {
        // Highlight event dates
        if (EventDates.Any(d => d.Date == args.Date.Date))
        {
            args.CellData.ClassList = "e-special-date";
        }
    }
}

dotnet add package Syncfusion.Blazor.Calendars
dotnet add package Syncfusion.Blazor.Themes

@using Syncfusion.Blazor
@using Syncfusion.Blazor.Calendars

builder.Services.AddSyncfusionBlazor();

<link href="_content/Syncfusion.Blazor.Themes/bootstrap5.css" rel="stylesheet" />
<script src="_content/Syncfusion.Blazor.Core/scripts/syncfusion-blazor.min.js"></script>

<SfDatePicker TValue="DateTime?" @bind-Value="@selectedDate">
    <DatePickerEvents TValue="DateTime?" ValueChange="@OnDateChange"></DatePickerEvents>
</SfDatePicker>

@code {
    DateTime? selectedDate = new DateTime(2026, 3, 18);
    
    void OnDateChange(ChangedEventArgs<DateTime?> args)
    {
        selectedDate = args.Value;
    }
}

<SfDatePicker TValue="DateTime?" Value="@selectedDate" 
              Placeholder="Select a date"></SfDatePicker>

<SfDatePicker TValue="DateTime?" Value="@selectedDate"
              Min="@minDate" Max="@maxDate"></SfDatePicker>

<SfDatePicker TValue="DateTime?" @bind-Value="@formData.BirthDate"></SfDatePicker>

<SfDatePicker TValue="DateTime?">
    <DatePickerEvents TValue="DateTime?" ValueChange="@OnDateSelected"></DatePickerEvents>
</SfDatePicker>

@code {
    void OnDateSelected(ChangedEventArgs<DateTime?> args)
    {
        // Trigger calculations, API calls, or validation
    }
}

<SfDatePicker TValue="DateTime?" Value="@selectedDate"
              Format="dd/MM/yyyy" Placeholder="DD/MM/YYYY"></SfDatePicker>

@using Syncfusion.Blazor.Calendars

<SfDateRangePicker TValue="DateTime?" Placeholder="Select a date range"></SfDateRangePicker>

<SfDateRangePicker TValue="DateTime?" 
    Placeholder="Choose a range" 
    Min="@MinDate" 
    Max="@MaxDate">
</SfDateRangePicker>

@code {
    public DateTime MinDate { get; set; } = new DateTime(2024, 1, 1);
    public DateTime MaxDate { get; set; } = new DateTime(2024, 12, 31);
}

<SfDateRangePicker TValue="DateTime?" 
    @bind-StartDate="StartDate" 
    @bind-EndDate="EndDate">
</SfDateRangePicker>

@code {
    private DateTime? StartDate { get; set; }
    private DateTime? EndDate { get; set; }
}

<SfDateRangePicker TValue="DateTime?" 
    MinDays="3" 
    MaxDays="30"
    @bind-StartDate="StartDate" 
    @bind-EndDate="EndDate">
</SfDateRangePicker>

@code {
    // User must select range between 3 and 30 days
    private DateTime? StartDate { get; set; }
    private DateTime? EndDate { get; set; }
}

<SfDateRangePicker TValue="DateTime?">
    <DateRangePickerPresets>
        <DateRangePickerPreset Label="Last 7 Days" Start="@last7DaysStart" End="@currentDate"></DateRangePickerPreset>
        <DateRangePickerPreset Label="Last 30 Days" Start="@last30DaysStart" End="@currentDate"></DateRangePickerPreset>
        <DateRangePickerPreset Label="This Month" Start="@currentMonthStart" End="@currentDate"></DateRangePickerPreset>
    </DateRangePickerPresets>
</SfDateRangePicker>

@code {
    private DateTime currentDate = DateTime.Now;
    private DateTime last7DaysStart = DateTime.Now.AddDays(-7);
    private DateTime last30DaysStart = DateTime.Now.AddDays(-30);
    private DateTime currentMonthStart = new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1);
}