Class SfComboBox<TValue, TItem>

The ComboBox component allows the user to type a value or choose an option from the list of predefined options.

Inheritance

System.Object

SfBaseComponent

SfDataBoundComponent

SfDropDownBase<TItem>

SfDropDownList<TValue, TItem>

SfComboBox<TValue, TItem>

SfAutoComplete<TValue, TItem>

Inherited Members

SfDropDownList<TValue, TItem>.FALSE

SfDropDownList<TValue, TItem>.TRUE

SfDropDownList<TValue, TItem>.NO_DATA

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.POPUP_CONTENT

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.GROUP_BY

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.DROP_DOWN_ICON

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.DDL_HEADER

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.DDL_FOOTER

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ARIA_LIVE

SfDropDownList<TValue, TItem>.ASSERTIVE

SfDropDownList<TValue, TItem>.ARIA_HAS_POPUP

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ARIA_ACTIVE_DESCENDANT

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.NULL_VALUE

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ARIA_OWN

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.OPTIONS

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ROLE

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.COMBO_BOX

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.AUTO_CORRECT

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.OFF

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.SPELL_CHECK

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.AUTO_COMPLETE

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.AUTO_CAPITAL

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ARIA_EXPANDED

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ARIA_SET_SIZE

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.SELECTED

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ITEM_FOCUS

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.Clear()

SfDropDownList<TValue, TItem>.ClearAsync()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.FocusIn()

SfDropDownList<TValue, TItem>.FocusAsync()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.FocusOut()

SfDropDownList<TValue, TItem>.FocusOutAsync()

SfDropDownList<TValue, TItem>.GetDataByValue(TValue)

SfDropDownList<TValue, TItem>.GetItemsAsync()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.GetItems()

SfDropDownList<TValue, TItem>.HideSpinnerAsync()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.HideSpinner()

SfDropDownList<TValue, TItem>.ShowSpinnerAsync()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ShowSpinner()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.Hide()

SfDropDownList<TValue, TItem>.HidePopupAsync()

SfDropDownList<TValue, TItem>.ShowPopupAsync()

SfDropDownList<TValue, TItem>.RefreshDataAsync()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ClosePopup()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.KeyActionHandler(Syncfusion.Blazor.DropDowns.KeyActions)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.VirtualScrollHandler()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.CallStateHasChangedAsync()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.OnInitializedAsync()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.PreRender()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.OnParametersSetAsync()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.OnAfterRenderAsync(System.Boolean)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.SetOldValue(System.Object, System.Boolean)

SfDropDownList<TValue, TItem>.UpdateMainData()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.GetScrollValue()

SfDropDownList<TValue, TItem>.UpdateValue()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.UpdateValueSelection(TItem, System.Boolean, System.Boolean)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.SetRTL()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.SetCssClass()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.UpdateAriaAttributes()

SfDropDownList<TValue, TItem>.FocusOutHandler(FocusEventArgs, Boolean)

SfDropDownList<TValue, TItem>.DropDownClick()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.HidePopup()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.OpenEventArgs()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.InvokePopupEvents(System.Boolean)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.InvokeClearBtnEvent(System.EventArgs, System.Boolean)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.FilterClear()

SfDropDownList<TValue, TItem>.ClearAll(EventArgs)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.FilterInputHandler(Microsoft.AspNetCore.Components.ChangeEventArgs)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.PasteHandler()

SfDropDownList<TValue, TItem>.OnFilterUp(KeyboardEventArgs)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.UpdateMainListData()

SfDropDownList<TValue, TItem>.SearchList(KeyboardEventArgs)

SfDropDownList<TValue, TItem>.FilteringAction(IEnumerable<TItem>, Query, FieldSettingsModel)

SfDropDownList<TValue, TItem>.FilterAsync(IEnumerable<TItem>, Query, FieldSettingsModel)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.Filter(System.Collections.Generic.IEnumerable<TItem>, Syncfusion.Blazor.Data.Query, Syncfusion.Blazor.DropDowns.FieldSettingsModel)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.RefreshPopup()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.GetQuery(Syncfusion.Blazor.Data.Query)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.IsFilter()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.InvokeBeforeOpen()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.InvokeAfterClosed()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.CreatePopup()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ShowPopup()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.UpdatePopupState()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.UpdateParentClass(System.String, System.String)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.UpdateChildProperties(System.Object)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.UpdateInputValue(System.String)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.OnMouseClick(Syncfusion.Blazor.DropDowns.ListOptions<TItem>, Microsoft.AspNetCore.Components.Web.MouseEventArgs)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.InvokeSelectEvent(TItem, System.EventArgs, Syncfusion.Blazor.DropDowns.KeyActions)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.UpdateSelectedItem(TItem, System.EventArgs, Syncfusion.Blazor.DropDowns.KeyActions)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.UpdateSelectItem(TItem, System.EventArgs, Syncfusion.Blazor.DropDowns.KeyActions)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.UpdateListSelection(TItem, System.String)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.SetValue(Syncfusion.Blazor.DropDowns.DataItems<TValue>)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.InvokeChangeEvent(System.EventArgs, Syncfusion.Blazor.DropDowns.KeyActions)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.OnChangeEvent(System.EventArgs, Syncfusion.Blazor.DropDowns.KeyActions)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.GetItemData(TItem)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ActionBegin(System.Collections.Generic.IEnumerable<TItem>, Syncfusion.Blazor.Data.Query)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ActionComplete(System.Collections.Generic.IEnumerable<TItem>, Syncfusion.Blazor.Data.Query)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.RenderEqualItems(System.Boolean)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ActionFailure(System.Object)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.IsEditTextBox()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.CustomValue(System.Boolean, Syncfusion.Blazor.DropDowns.KeyActions)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.UpdateAutoFillOnDown(TItem)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.UpdateFocusItem(TItem)

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.UpdateValidateClass()

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.OnSearch(Microsoft.AspNetCore.Components.Web.KeyboardEventArgs)

SfDropDownList<TValue, TItem>.BuildRenderTree(RenderTreeBuilder)

SfDropDownList<TValue, TItem>.ID

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ChildContent

SfDropDownList<TValue, TItem>.ValueExpression

SfDropDownList<TValue, TItem>.AllowFiltering

SfDropDownList<TValue, TItem>.CssClass

SfDropDownList<TValue, TItem>.EnableRtl

SfDropDownList<TValue, TItem>.FilterBarPlaceholder

SfDropDownList<TValue, TItem>.FloatLabelType

SfDropDownList<TValue, TItem>.FooterTemplate

SfDropDownList<TValue, TItem>.HeaderTemplate

SfDropDownList<TValue, TItem>.HtmlAttributes

SfDropDownList<TValue, TItem>.InputAttributes

SfDropDownList<TValue, TItem>.Index

SfDropDownList<TValue, TItem>.IndexChanged

SfDropDownList<TValue, TItem>.Placeholder

SfDropDownList<TValue, TItem>.PopupHeight

SfDropDownList<TValue, TItem>.PopupWidth

SfDropDownList<TValue, TItem>.Readonly

SfDropDownList<TValue, TItem>.ShowClearButton

SfDropDownList<TValue, TItem>.EnableVirtualization

SfDropDownList<TValue, TItem>.ItemsCount

SfDropDownList<TValue, TItem>.Value

SfDropDownList<TValue, TItem>.ValueChanged

SfDropDownList<TValue, TItem>.ValueTemplate

SfDropDownList<TValue, TItem>.Width

SfDropDownList<TValue, TItem>.TabIndex

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.OnChange

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.OnInput

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.OnBlur

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.OnFocus

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.DropDownListParent

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.InputBaseObj

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.FilterinputObj

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.RootClass

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ContainerClass

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.DropdownValue

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ClearBtnStopPropagation

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.PreventContainer

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.IsDevice

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ShowPopupList

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.PopupElement

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.PopupHolderEle

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.PopupContainer

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.IsListRender

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.IsDropDownClick

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.IsMainDataUpdated

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.IsValidKey

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.IsTyped

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.IsFilterClearClicked

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.IsCustomFilter

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.IsFilterPrevented

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ActiveIndex

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ContainerAttr

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.PreviousValue

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.PreviousItemData

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.TypedString

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.BeforePopupOpen

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.PreventAutoFill

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.FocusedData

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.VirtualSpinnerObj

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ComponentName

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.PreventIconHandler

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.PopupContent

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.NoDataContent

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.DropdownIcon

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ROOT

Syncfusion.Blazor.DropDowns.SfDropDownBase<TItem>.Render(System.Collections.Generic.IEnumerable<TItem>, Syncfusion.Blazor.DropDowns.FieldSettingsModel, Syncfusion.Blazor.Data.Query)

Syncfusion.Blazor.DropDowns.SfDropDownBase<TItem>.SetListData(System.Collections.Generic.IEnumerable<TItem>, Syncfusion.Blazor.DropDowns.FieldSettingsModel, Syncfusion.Blazor.Data.Query)

Syncfusion.Blazor.DropDowns.SfDropDownBase<TItem>.ActionBegin(System.Collections.Generic.IEnumerable<TItem>, Syncfusion.Blazor.Data.Query)

SfDropDownBase<TItem>.ActionComplete(IEnumerable<TItem>, Query)

SfDropDownBase<TItem>.ActionFailure(Object)

Syncfusion.Blazor.DropDowns.SfDropDownBase<TItem>.GetQuery(Syncfusion.Blazor.Data.Query)

SfDropDownBase<TItem>.SetFields()

SfDropDownBase<TItem>.SimpleDataExecute(IEnumerable<TItem>, Query)

SfDropDownBase<TItem>.CloneQuery(Query)

Syncfusion.Blazor.DropDowns.SfDropDownBase<TItem>.OnInitializedAsync()

Syncfusion.Blazor.DropDowns.SfDropDownBase<TItem>.OnParametersSetAsync()

Syncfusion.Blazor.DropDowns.SfDropDownBase<TItem>.GetDataByText(System.String, System.String)

Syncfusion.Blazor.DropDowns.SfDropDownBase<TItem>.IncrementalSearch(System.String, System.Collections.Generic.IEnumerable<TItem>, System.Nullable<System.Int32>, System.Boolean)

Syncfusion.Blazor.DropDowns.SfDropDownBase<TItem>.Search(System.String, System.Collections.Generic.IEnumerable<TItem>, System.String, System.Boolean)

SfDropDownBase<TItem>.SetItemValue(String, Type)

SfDropDownBase<TItem>.IsSimpleDataType()

Syncfusion.Blazor.DropDowns.SfDropDownBase<TItem>.AddItems(System.Collections.Generic.IEnumerable<TItem>, System.Nullable<System.Int32>)

SfDropDownBase<TItem>.AddItemsAsync(IEnumerable<TItem>, Nullable<Int32>)

SfDropDownBase<TItem>.InsertItem(IEnumerable<TItem>, Nullable<Int32>, Boolean)

SfDropDownBase<TItem>.IsFilter()

Syncfusion.Blazor.DropDowns.SfDropDownBase<TItem>.RenderItems()

Syncfusion.Blazor.DropDowns.SfDropDownBase<TItem>.HighlightSearch(System.String, System.String, System.Boolean, Syncfusion.Blazor.DropDowns.FilterType)

SfDropDownBase<TItem>.ListItemCreated(ListOptions<TItem>)

SfDropDownBase<TItem>.EnablePersistence

SfDropDownBase<TItem>.ItemTemplate

SfDropDownBase<TItem>.GroupTemplate

SfDropDownBase<TItem>.NoRecordsTemplate

SfDropDownBase<TItem>.ActionFailureTemplate

SfDropDownBase<TItem>.SortOrder

SfDropDownBase<TItem>.Enabled

SfDropDownBase<TItem>.DataSource

SfDropDownBase<TItem>.Query

SfDropDownBase<TItem>.DuplicateQuery

SfDropDownBase<TItem>.FilterType

SfDropDownBase<TItem>.IgnoreCase

SfDropDownBase<TItem>.IgnoreAccent

SfDropDownBase<TItem>.ZIndex

SfDropDownBase<TItem>.DropDownsEditContext

Syncfusion.Blazor.DropDowns.SfDropDownBase<TItem>.ListData

Syncfusion.Blazor.DropDowns.SfDropDownBase<TItem>.MainData

Syncfusion.Blazor.DropDowns.SfDropDownBase<TItem>.ListDataSource

Syncfusion.Blazor.DropDowns.SfDropDownBase<TItem>.DataId

Syncfusion.Blazor.DropDowns.SfDropDownBase<TItem>.ItemData

Syncfusion.Blazor.DropDowns.SfDropDownBase<TItem>.IsActionFaiure

Syncfusion.Blazor.DropDowns.SfDropDownBase<TItem>.TotalCount

Syncfusion.Blazor.DropDowns.SfDropDownBase<TItem>.ComponentName

SfDataBoundComponent.SetDataManager<T>(Object)

SfDataBoundComponent.OnAfterRenderAsync(Boolean)

SfDataBoundComponent.DataManager

SfDataBoundComponent.MainParent

SfBaseComponent.Dispose()

SfBaseComponent.Dispose(Boolean)

SfBaseComponent.OnObservableChange(String, Object, Boolean, NotifyCollectionChangedEventArgs)

Namespace: Syncfusion.Blazor.DropDowns

Assembly: Syncfusion.Blazor.dll

Syntax

public class SfComboBox<TValue, TItem> : SfDropDownList<TValue, TItem>, IInputBase, IDropDowns

Type Parameters

Name	Description
TValue	Specifies the value type.
TItem	Specifies the type of SfComboBox.

Constructors

SfComboBox()

Declaration

public SfComboBox()

Properties

AllowCustom

Specifies whether the component allows user defined value which does not exist in data source.

Declaration

public bool AllowCustom { get; set; }

Property Value

Type	Description
System.Boolean

Autofill

Specifies whether suggest a first matched item in input when searching. No action happens when no matches found.

Declaration

public bool Autofill { get; set; }

Property Value

Type	Description
System.Boolean

ShowClearButton

Specifies whether to show or hide the clear button.

When the clear button is clicked, `Value`, `Text`, and `Index` properties are reset to null.

Declaration

public override bool ShowClearButton { get; set; }

Property Value

Type	Description
System.Boolean

Overrides

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.ShowClearButton

ValidateOnInput

Specifies a boolean value that indicates whether the component validates the input or not.

Declaration

public bool ValidateOnInput { get; set; }

Property Value

Type	Description
System.Boolean	true, If the ValidateOnInput is enabled for form validation, then the model value will be updated on entering the value to the input. otherwise, false.The default value is false.

Remarks

This property is used to validate the form on typing into the input and updating the model value. The ValueChange event will be fired after the component lost its focus.

Methods

BuildRenderTree(RenderTreeBuilder)

Declaration

protected override void BuildRenderTree(RenderTreeBuilder __builder)

Parameters

Type	Name	Description
Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder	__builder

Overrides

Syncfusion.Blazor.DropDowns.SfDropDownList<TValue, TItem>.BuildRenderTree(Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder)