Blazor DateRange Picker Component Overview

The Blazor DateRange Picker component allows the user to select a date range (start and end date) - both from a visual list (Telerik UI for Blazor Calendar) or to type it into a date input that can accept only dates. You can control the format shown in the input, and dates the user cannot select, as well as implement validation and respond to events.

Creating Blazor Date Range Picker

1. Use the TelerikDateRangePicker tag to add the component to your razor page.
2. Bind its StartValue and EndValue parameters to DateTime objects.
3. (optional) Provide custom Format, Min and Max values.
4. (optional) Set the AllowReverse parameter and define if the range is valid and highlighed when the end date preceeds the start date.

Basic Date Range Picker with custom format, min and max and reverse range

@StartValue?.ToString("dd MMM yyyy")
<br />
@EndValue?.ToString("dd MMM yyyy")
<br />
<TelerikDateRangePicker @bind-StartValue="@StartValue"
                        @bind-EndValue="@EndValue"
                        Format="dd MMMM yyyy"
                        Min="@Min" Max="@Max"
                        AllowReverse="true">
</TelerikDateRangePicker>

@code {
    public DateTime? StartValue { get; set; } = DateTime.Now;
    public DateTime? EndValue { get; set; } = DateTime.Now.AddDays(10);
    public DateTime Min = new DateTime(1990, 1, 1, 8, 15, 0);
    public DateTime Max = new DateTime(2025, 1, 1, 19, 30, 45);
}

Date Input Typing Settings

The DateRangePicker textbox is a DateInput component, which provides various parameters to configure the keyboard typing experience. The settings are related to:

• Caret placement;
• Two-digit year values;
• Automatic correction of invalid date segments.

See the DateInput keyboard documentation for details and examples. The same DateInput parameters with the same behavior exist for the DateRangePicker.

Events

The Blazor Date Range Picker generates events that you can handle and further customize its behavior. Read more about the Blazor Date Range Picker events....

Validation

You can ensure that the component value is acceptable by using the built-in validation. Read more about input validation....

By default, a valid date range is when the start date is before the end date. When a valid range is selected the Calendar popup closes. To set a range where the start date is after the end date as valid you can use the AllowReverse parameter. When you set AllowReverse to true the Calendar popup closes on each date selection.

Header Template

The DateRangePicker allows you to customize the rendering of the Calendar popup header. Learn more from the Header Template article.

Adaptive Rendering

The component supports different popup rendering depending on the screen size. Read more about the Adaptive Rendering functionality and how to enable it...

DateRangePicker Parameters

The Blazor Date Range Picker provides various parameters that allow you to configure the component. Also check the DateRangePicker's public API.

Attribute	Type and Default Value	Description
AdaptiveMode	AdaptiveMode (None)	The adaptive mode of the component.
AllowReverse	bool	Defines if the range is valid when the selected end date is a date before the start date.
BottomView	CalendarView enum (Month)	Defines the bottommost view in the popup calendar to which the user can navigate to.
DebounceDelay	int (150)	Time in milliseconds between the last typed symbol and the value update. Use it to balance between client-side performance and number of database queries.
DisabledDates	List<DateTime>	A list of dates that can not be selected as the start or end of the range. See the Live Demo: Date Range Picker Disabled Dates.
Enabled	bool	Whether typing in the inputs is allowed.
ReadOnly	bool	If set to true, the component will be readonly and will not allow user input. The component is not readonly by default and allows user input.
EndId and StartId	string	The id attribute on the <input /> element, so you can attach a <label for=""> to the input.
Format	string (ShortDatePattern)	The format of the DateRangePicker DateInputs. The default value depends on CultureInfo.CurrentCulture. Read more at Supported date formats by the DateInput.
Max	DateTime (DateTime(2099, 12, 31))	The latest date that the user can select.
Min	DateTime (DateTime(1900, 1, 1))	The earliest date that the user can select.
Orientation	CalendarOrientationenum (Horizontal)	The orientation of the calendar popup. The available options are Horizontal and Vertical.
Placeholder	string	The placeholder attribute of the two <input /> elements. The Placeholder will appear if the component is bound to nullable DateTime objects - DateTime?, but will not be rendered if the component is bound to the default value of a non-nullable DateTime objects. The Placeholder value will be displayed when the input is not focused. Once the user focuses it to start typing, the Format Placeholder (default or customized one) will override the Placeholder to indicate the format the date should be entered in.
ShowClearButton	bool	Defines if the user can clear the component value through an x button rendered inside the input.
ShowWeekNumbers	bool	Sets if the popup Calendars will display week numbers according to the ISO-8601 format. Note that the ISO week number may differ from the conventional .NET week number.
ShowOtherMonthDays	bool	Defines whether the leading and trailing days from other months in the Calendar popup are visible in the current month view.
StartValue and EndValue	T	The current values of the inputs for start and end of the range. Can be used for two-way binding.
TabIndex	int?	The tabindex attribute of both input HTML elements in the component. They both will have the same tabindex. Use it to customize the tabbing (focus) order of the inputs on your page.
Title	string	The title text rendered in the header of the popup(action sheet). Applicable only when AdaptiveMode is set to Auto.
View	CalendarView enum (Month)	The current view that will be displayed in the popup calendar.

The date range picker is, essentially, two DateInputs and a Calendar and the properties it exposes are mapped to the corresponding properties of these two components. You can read more about their behavior in the respective components' documentation.

Typing User Experience

The component provides multiple parameters, which control the caret placement, two-digit year values and the auto-correct behavior of the textbox. See the DateInput documentation for details.

Styling and Appearance

The following parameters enable you to customize the appearance of the Blazor Date Range Picker:

Attribute	Type and Default Value	Description
Class	string	The CSS class that will be rendered on the main wrapping element of the Date Range Picker.
PopupClass	string	additional CSS class to customize the appearance of the Date Range Picker's dropdown.

You can find more options for customizing the Date Range Picker styling in the Appearance article.

Format Placeholder

It is possible to set custom strings as placeholders for each date format segment. This feature is available for the following Telerik UI for Blazor components:

• DateInput
• DatePicker
• DateRangePicker
• DateTimePicker
• TimePicker

To set up the FormatPlaceholder, use the <*Component*FormatPlaceholder> nested tag. It allows you to set format placeholders by using the following parameters:

• Day
• Month
• Year
• Hour
• Minute
• Second
• Weekday
• DayPeriod

By default, the value for all parameters is null, which applies the full format specifier.

DateRangePicker Reference and Methods

Add a reference to the component instance to use the Date Range Picker's methods.

Method	Description
Close	Closes the Calendar popup.
FocusStartAsync	Focuses the Date Range Picker start value textbox. Always await this call, as it relies on JSInterop. Also check the dedicated KB article about programmatic input component focusing, which provides more examples and tips.
FocusEndAsync	Focuses the Date Range Picker end value textbox. Always await this call, as it relies on JSInterop.
NavigateTo	Navigates to a specified date and view. The method expects a DateTime and CalendarView arguments.
Open	Opens the Calendar popup.
Refresh	Re-renders the Calendar popup.

<TelerikButton OnClick="@FocusStart">Focus Start TextBox</TelerikButton>
<TelerikButton OnClick="@FocusEnd">Focus End TextBox</TelerikButton>
<TelerikButton OnClick="@OpenPicker">Open DateRangePicker</TelerikButton>

<TelerikDateRangePicker @ref="@DateRangePickerRef"
                        @bind-StartValue="@DateRangePickerStartValue"
                        @bind-EndValue="@DateRangePickerEndValue" />

@code {
    // the component type depends on the value type, could be also DateTime?
    private TelerikDateRangePicker<DateTime> DateRangePickerRef { get; set; }

    private DateTime DateRangePickerStartValue { get; set; } = DateTime.Now;

    private DateTime DateRangePickerEndValue { get; set; } = DateTime.Now.AddDays(10);

    private async Task FocusStart()
    {
        await DateRangePickerRef.FocusStartAsync();
    }

    async Task FocusEnd()
    {
        await DateRangePickerRef.FocusEndAsync();
    }

    void OpenPicker()
    {
        DateRangePickerRef.Open();
    }
}

Next Steps

• Using the Date Range Picker Events

See Also

• Live Demo: Date Range Picker
• Input Validation
• Supported Input Date Formats
• DateRangePicker API Reference