Class SfDropDownBase<T>

The DropDownBase can be created data source and fetch the list of data from data bound component.

Inheritance

System.Object

SfBaseComponent

SfDataBoundComponent

SfDropDownBase<T>

SfDropDownList<TValue, TItem>

SfListBox<TValue, TItem>

SfMention<TItem>

SfMultiSelect<TValue, TItem>

Inherited Members

SfBaseComponent.Dispose()

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

SfDataBoundComponent.DataManager

SfDataBoundComponent.MainParent

SfDataBoundComponent.OnAfterRenderAsync(Boolean)

SfDataBoundComponent.OnInitializedAsync()

SfDataBoundComponent.OnParametersSetAsync()

SfDataBoundComponent.SetDataManager<T>(Object)

Namespace: Syncfusion.Blazor.DropDowns

Assembly: Syncfusion.Blazor.dll

Syntax

public class SfDropDownBase<T> : SfDataBoundComponent

Type Parameters

Name	Description
T	Specifies the type of SfDropDownBase.

Constructors

SfDropDownBase()

Declaration

public SfDropDownBase()

Properties

ActionFailureTemplate

Gets or sets the template and assigns it to the popup list content of the component, when the data fetch request from the remote server fails.

Declaration

public RenderFragment ActionFailureTemplate { get; set; }

Property Value

Type	Description
Microsoft.AspNetCore.Components.RenderFragment	The template content. The default value is `null`.

DataSource

Gets or sets the list items either through local or remote service and binds it to the component.

It can be an array of JSON Objects or an instance of `DataManager`.

Declaration

public IEnumerable<T> DataSource { get; set; }

Property Value

Type	Description
System.Collections.Generic.IEnumerable<T>	Binding data to the popup element. The default value is `null`.

DropDownsEditContext

Gets or sets the edit context of dropdown base.

Declaration

protected EditContext DropDownsEditContext { get; set; }

Property Value

Type
Microsoft.AspNetCore.Components.Forms.EditContext

DuplicateQuery

Declaration

protected Query DuplicateQuery { get; set; }

Property Value

Type
Query

FilterDataSource

Declaration

protected IEnumerable<T> FilterDataSource { get; set; }

Property Value

Type
System.Collections.Generic.IEnumerable<T>

FilterQuery

Declaration

protected Query FilterQuery { get; set; }

Property Value

Type
Query

FilterType

Gets or sets which filter type, the component needs to be considered on search action.

Declaration

public virtual FilterType FilterType { get; set; }

Property Value

Type	Description
FilterType	The filter type specifed for searching the list items. The default value is `FilterType.StartsWith`.

GeneratedData

Declaration

protected Dictionary<int, IEnumerable<object>> GeneratedData { get; set; }

Property Value

Type
System.Collections.Generic.Dictionary<System.Int32, System.Collections.Generic.IEnumerable<System.Object>>

GroupTemplate

Gets or sets the template design and assigns it to the group headers present in the popup list.

Declaration

public RenderFragment<ComposedItemModel<T>> GroupTemplate { get; set; }

Property Value

Type	Description
Microsoft.AspNetCore.Components.RenderFragment<Syncfusion.Blazor.DropDowns.ComposedItemModel<T>>	The template content. The default value is `null`.

IgnoreAccent

Gets or sets whether diacritic characters or accents are ignored.

Declaration

public bool IgnoreAccent { get; set; }

Property Value

Type	Description
System.Boolean	`true`, ignores the diacritic characters or accents when filtering. The default value is `false`.

IgnoreCase

Gets or sets whether case-sensitivity is enabled or disabled when searching for suggestions.

Declaration

public bool IgnoreCase { get; set; }

Property Value

Type	Description
System.Boolean	`false`, consider the `case-sensitive` on performing the search to find suggestions. The default value is `true`.

IncrementalEndIndex

Declaration

protected int IncrementalEndIndex { get; set; }

Property Value

Type
System.Int32

IncrementalSearchIndex

Declaration

protected int IncrementalSearchIndex { get; set; }

Property Value

Type
System.Int32

IncrementalStartIndex

Declaration

protected int IncrementalStartIndex { get; set; }

Property Value

Type
System.Int32

IsCustomFilteringAction

Declaration

protected bool IsCustomFilteringAction { get; set; }

Property Value

Type
System.Boolean

IsEntireDataUpdated

Declaration

protected bool IsEntireDataUpdated { get; set; }

Property Value

Type
System.Boolean

IsExecuteQueryCalled

Declaration

protected bool IsExecuteQueryCalled { get; set; }

Property Value

Type
System.Boolean

IsMultiSelect

Declaration

protected bool IsMultiSelect { get; set; }

Property Value

Type
System.Boolean

IsReOrderData

Declaration

protected bool IsReOrderData { get; set; }

Property Value

Type
System.Boolean

IsVirtualizationEnabled

Declaration

protected bool IsVirtualizationEnabled { get; set; }

Property Value

Type
System.Boolean

IsVirtualSelectAll

Declaration

protected bool IsVirtualSelectAll { get; set; }

Property Value

Type
System.Boolean

ItemTemplate

Gets or sets the template design and assigns it to each list item present in the popup.

Declaration

public RenderFragment<T> ItemTemplate { get; set; }

Property Value

Type	Description
Microsoft.AspNetCore.Components.RenderFragment<T>	The template content. The default value is `null`.

ListHeight

Declaration

protected int ListHeight { get; set; }

Property Value

Type
System.Int32

ListItemsCount

Declaration

protected int ListItemsCount { get; set; }

Property Value

Type
System.Int32

ListVirtualData

Declaration

protected VirtualListData ListVirtualData { get; set; }

Property Value

Type
VirtualListData

NoRecordsTemplate

Gets or sets the template design and assigns it to popup list of component, when no data is available on the component.

Declaration

public RenderFragment NoRecordsTemplate { get; set; }

Property Value

Type	Description
Microsoft.AspNetCore.Components.RenderFragment	The template content. The default value is `null`.

PreviousFocusData

Declaration

protected T PreviousFocusData { get; set; }

Property Value

Type
T

Query

Gets or sets the external Query that execute along with data processing.

Declaration

public Query Query { get; set; }

Property Value

Type	Description
Query	Query value to be used for data fetching. The default value is `null`.

reflectionHelper

Declaration

protected ReflectionHelper reflectionHelper { get; set; }

Property Value

Type
Syncfusion.Blazor.ReflectionHelper

ReOrderData

Declaration

protected IEnumerable<ListOptions<T>> ReOrderData { get; set; }

Property Value

Type
System.Collections.Generic.IEnumerable<ListOptions<T>>

ScrollActions

Declaration

protected VirtualAction ScrollActions { get; set; }

Property Value

Type
Syncfusion.Blazor.DropDowns.VirtualAction

SelectedValueAction

Declaration

protected VirtualAction SelectedValueAction { get; set; }

Property Value

Type
Syncfusion.Blazor.DropDowns.VirtualAction

SortOrder

Specifies the `SortOrder` to sort the data source.

The available type of sort orders are.

NoneThe data source is not sorting.
AscendingThe data source is sorting with ascending order.
DescendingThe data source is sorting with descending order.

Declaration

public SortOrder SortOrder { get; set; }

Property Value

Type	Description
SortOrder	The order of sorting the list items. The default value is `SortOrder.None`.

VirtualCustomData

Declaration

protected T VirtualCustomData { get; set; }

Property Value

Type
T

VirtualGroupDataSource

Declaration

protected IEnumerable<T> VirtualGroupDataSource { get; set; }

Property Value

Type
System.Collections.Generic.IEnumerable<T>

VirtualItemEndIndex

Declaration

protected int VirtualItemEndIndex { get; set; }

Property Value

Type
System.Int32

VirtualItemStartIndex

Declaration

protected int VirtualItemStartIndex { get; set; }

Property Value

Type
System.Int32

VirtualListHeight

Declaration

protected int VirtualListHeight { get; set; }

Property Value

Type
System.Int32

VirtualSelectAllDataSource

Declaration

protected IEnumerable<ListOptions<T>> VirtualSelectAllDataSource { get; set; }

Property Value

Type
System.Collections.Generic.IEnumerable<ListOptions<T>>

ZIndex

Gets or sets the z-index value of the component popup element.

Declaration

public double ZIndex { get; set; }

Property Value

Type	Description
System.Double	The ZIndex value for the popup element.The default value is `1000`.

Methods

ActionCompleteAsync(IEnumerable<T>, Query)

Task which specifies the action complete.

Declaration

protected virtual Task ActionCompleteAsync(IEnumerable<T> dataSource, Query query = null)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<T>	dataSource	Specifies the data source.
Query	query	Specifies the query.

Returns

Type	Description
System.Threading.Tasks.Task	Task.

ActionFailureAsync(Object)

Task which specifies the action failure.

Declaration

protected virtual Task ActionFailureAsync(object arguments)

Parameters

Type	Name	Description
System.Object	arguments	Specifies the object arguments.

Returns

Type	Description
System.Threading.Tasks.Task	Task.

AddItemsAsync(IEnumerable<T>, Nullable<Int32>)

Add new items to the popup list. By default, new items append to the list as the last item, but you can insert based on the index parameter.

Declaration

public Task AddItemsAsync(IEnumerable<T> items, Nullable<int> itemIndex = null)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<T>	items	Specifies the items append to the list based on index.
System.Nullable<System.Int32>	itemIndex	Specifies the index to place the newly added item in the popup list.

Returns

Type
System.Threading.Tasks.Task

CloneQuery(Query)

Method which clones the query.

Declaration

protected Query CloneQuery(Query query)

Parameters

Type	Name	Description
Query	query	Specifies the query.

Returns

Type	Description
Query	Query.

DataProcessAsync(VirtualAction, Boolean)

Declaration

protected Task DataProcessAsync(VirtualAction action = null, bool isOpenPopup = false)

Parameters

Type	Name	Description
Syncfusion.Blazor.DropDowns.VirtualAction	action
System.Boolean	isOpenPopup

Returns

Type
System.Threading.Tasks.Task

DisableListItem(ListOptions<T>)

Update the disable class and disable attributes in a ListOptions object.

Declaration

protected void DisableListItem(ListOptions<T> disableItem)

Parameters

Type	Name	Description
ListOptions<T>	disableItem	The ListOptions object that represents the list item to be disabled.

Remarks

This method modifies the ListClass property of the ListOptions object by adding the DISABLED_ITEM class. It also sets the "aria-selected" attribute to "false" and the "aria-disabled" attribute to "true" in the ListAttribute dictionary of the ListOptions object. If the ListAttribute dictionary is null, it initializes a new dictionary before setting the attributes.

Dispose(Boolean)

Declaration

protected override void Dispose(bool disposing)

Parameters

Type	Name	Description
System.Boolean	disposing

Overrides

SfBaseComponent.Dispose(Boolean)

ExecuteSimpleQuery(IEnumerable<T>, Query, Boolean)

Specifies the data execute.

Declaration

protected IEnumerable<T> ExecuteSimpleQuery(IEnumerable<T> data, Query query, bool isUpdateCount = false)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<T>	data	Specifies the data.
Query	query	Specifies the query.
System.Boolean	isUpdateCount	Specifies to update dataCount.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	Simple data.

GenerateAndExecuteQueryAsync(Query, Int32, Int32)

Declaration

protected Task GenerateAndExecuteQueryAsync(Query query, int virtualItemStartIndex = 0, int virtualItemEndIndex = 0)

Parameters

Type	Name	Description
Query	query
System.Int32	virtualItemStartIndex
System.Int32	virtualItemEndIndex

Returns

Type
System.Threading.Tasks.Task

GetGroupedDataSourceAsync(IEnumerable<T>, SortOrder)

Declaration

protected Task<IEnumerable<ListOptions<T>>> GetGroupedDataSourceAsync(IEnumerable<T> dataSource, SortOrder sortOrder)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<T>	dataSource
SortOrder	sortOrder

Returns

Type
System.Threading.Tasks.Task<System.Collections.Generic.IEnumerable<ListOptions<T>>>

GetSkeletonCount(Boolean)

Declaration

protected void GetSkeletonCount(bool RetainSkeleton = false)

Parameters

Type	Name	Description
System.Boolean	RetainSkeleton

InsertItemAsync(IEnumerable<T>, Nullable<Int32>, Boolean)

Method which inserts the item.

Declaration

protected Task InsertItemAsync(IEnumerable<T> items, Nullable<int> itemIndex = null, bool preventInit = false)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<T>	items	Specifies the items.
System.Nullable<System.Int32>	itemIndex	Specifies the item index.
System.Boolean	preventInit	Specifies whether it preventInit or not.

Returns

Type	Description
System.Threading.Tasks.Task	Task.

IsDisable(T)

Determines whether the list item is disabled based on the 'Disabled' field.

Declaration

protected bool IsDisable(T listItem)

Parameters

Type	Name	Description
T	listItem	The list item of type ListOptions<T>.

Returns

Type	Description
System.Boolean	Returns true if the 'Disabled' field of the list item is true, otherwise false. If the 'Disabled' field is a string, it tries to parse it to a boolean value.

IsFilterMode()

Method specifies whether filter mode or not.

Declaration

protected virtual bool IsFilterMode()

Returns

Type	Description
System.Boolean	bool.

IsPrimitiveDataType()

Method speciifes whether the data is simple data type.

Declaration

protected bool IsPrimitiveDataType()

Returns

Type	Description
System.Boolean	Bool.

IsVirtualization(Boolean, Boolean, Boolean, Boolean)

Declaration

protected virtual void IsVirtualization(bool isVirtualization, bool isAllowFiltering, bool isDropDown, bool deviceSpecific)

Parameters

Type	Name	Description
System.Boolean	isVirtualization
System.Boolean	isAllowFiltering
System.Boolean	isDropDown
System.Boolean	deviceSpecific

ListItemCreated(ListOptions<T>)

Triggers while the list item get created.

Declaration

protected virtual ListOptions<T> ListItemCreated(ListOptions<T> listItem)

Parameters

Type	Name	Description
ListOptions<T>	listItem	Specifies the list item.

Returns

Type	Description
ListOptions<T>	ListOptions.

SetCurrentViewDataAsync(Int32, Int32)

Declaration

protected virtual Task SetCurrentViewDataAsync(int virtualItemStartIndex, int virtualItemEndIndex)

Parameters

Type	Name	Description
System.Int32	virtualItemStartIndex
System.Int32	virtualItemEndIndex

Returns

Type
System.Threading.Tasks.Task

SetFields()

Method which sets the fields.

Declaration

protected void SetFields()

SetItemValue(String, Type)

Method which set item value.

Declaration

protected T SetItemValue(string itemValue, Type valueType = null)

Parameters

Type	Name	Description
System.String	itemValue	Specifies the item value.
System.Type	valueType

Returns

Type	Description
T	Type.