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DxSchedulerAppointmentLabelItem Class

A label used to categorize appointments in the Scheduler.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v23.2.dll

NuGet Package: DevExpress.Blazor


public class DxSchedulerAppointmentLabelItem :


You can use color labels to categorize appointments. A label is displayed as an appointment’s background.

Scheduler - Appointment labels

When users create or edit an appointment in the Appointment form, they can select the appointment’s label from the drop-down Label list.

Scheduler - Default appointment labels

The Caption property specifies the label’s text. The Color or BackgroundCssClass property defines the appearance of appointments to which the label is assigned. The TextCssClass specifies a CSS class applied to appointment text.


When you use templates to customize appointment appearance, the Color, BackgroundCssClass, and TextCssClass property values are not applied to appointments. In the template, you can use the context.Label parameter to access these property values.

Built-In Labels

The Scheduler has a built-in collection of 11 color labels.

  • Light (ID: 0)
  • Blue (ID: 1)
  • Purple (ID: 2)
  • Indigo (ID: 3)
  • Pink (ID: 4)
  • Red (ID: 5)
  • Orange (ID: 6)
  • Yellow (ID: 7)
  • Green (ID: 8)
  • Teal (ID: 9)
  • Cyan (ID: 10)

Custom Labels

Do the following to create a new collection with your own labels:

  1. Create a DxSchedulerDataStorage object that uses a constructor without parameters and specify appointment mappings. See the DxSchedulerAppointmentMappings class description for more information.
  2. Declare a class (for instance, LabelObject) that stores label settings and an ID.
  3. Create a collection of label source objects (LabelObject class instances) and define their settings.
  4. Assign the newly created collection to the storage’s AppointmentLabelsSource property.
  5. Assign the DxSchedulerAppointmentLabelMappings object to the AppointmentLabelMappings property. In this object, map the label’s source fields to the label’s properties.
  6. Optional. You can create custom fields for label items. Define custom fields in the label’s source object and add these fields to the CustomFieldMappings collection. For instance, the code below adds the MyCustomField field to the LabelObject and maps this field to the label’s MyCustomProperty.
<DxScheduler DataStorage="@DataStorage">
        <DxSchedulerDayView DayCount="3"
                            TimeScale="@(new TimeSpan(1,0,0))"
                            WorkTime="new DxSchedulerTimeSpanRange(TimeSpan.FromHours(9), TimeSpan.FromHours(18))"
                            VisibleTime="new DxSchedulerTimeSpanRange(TimeSpan.FromHours(8), TimeSpan.FromHours(19))"
        <DxSchedulerWeekView ShowWorkTimeOnly="true" />
        <DxSchedulerWorkWeekView ShowWorkTimeOnly="true" />
    <AppointmentCompactFormLayout Context="formInfo">

@code {
    DxSchedulerDataStorage DataStorage = new DxSchedulerDataStorage() {
        // Specify appointment mappings here
        // ...
        AppointmentLabelsSource = LabelCollection.GetLabels(),
        AppointmentLabelMappings = new DxSchedulerAppointmentLabelMappings() {
            Id = "Id",
            Caption = "LabelCaption",
            Color = "LabelColor",
            // Uncomment the line below and comment the line above to specify other background options.
            //BackgroundCssClass = "BackgroundCssClass",
            TextCssClass = "TextCssClass",
            // Map the source object's custom field to the label's custom property.
            CustomFieldMappings = new List<DxSchedulerCustomFieldMapping> {
                new DxSchedulerCustomFieldMapping { Name = "MyCustomProperty", Mapping = "MyCustomField" }

Scheduler Custom Labels


See Also