Class

TelerikPanelBar

Controls how many panel items can be expanded simultaneously. "PanelBarExpandMode.Single" allows only one item to be expanded at a time, automatically collapsing others when a new item is expanded. "PanelBarExpandMode.Multiple" allows multiple items to remain expanded simultaneously, giving users full control over the panel state.

Declaration

[Parameter]
public PanelBarExpandMode ExpandMode { get; set; }

Property Value

Specifies which data items are currently expanded in the PanelBar. Bind this to a collection of data objects to programmatically control or track which panel items are expanded. Works together with "ExpandedItemsChanged" for two-way binding. Use with "ExpandMode" to control expansion behavior. When "ExpandMode" is "PanelBarExpandMode.Single", only one item per hierarchical level will remain expanded.

Declaration

[Parameter]
public IEnumerable<object> ExpandedItems { get; set; }

Property Value

Fires when the collection of expanded items changes due to user interaction or programmatic updates. Use this event callback to implement two-way binding with "ExpandedItems" for tracking panel expansion state. The event provides the updated collection of expanded data items after expand/collapse operations.

Declaration

[Parameter]
public EventCallback<IEnumerable<object>> ExpandedItemsChanged { get; set; }

Property Value

Fires when a PanelBar item is collapsed by user interaction or programmatic action. Use this event to implement custom logic when items are closed, such as cleanup operations or state management. The event provides details about the collapsed item through "PanelBarCollapseEventArgs".

Declaration

[Parameter]
public EventCallback<PanelBarCollapseEventArgs> OnCollapse { get; set; }

Property Value

Fires when a PanelBar item is expanded by user interaction or programmatic action. Use this event to implement custom logic when items are opened, such as loading additional data or tracking user behavior. The event provides details about the expanded item through "PanelBarExpandEventArgs".

Declaration

[Parameter]
public EventCallback<PanelBarExpandEventArgs> OnExpand { get; set; }

Property Value

Fires when a user clicks on a PanelBar item header or content area. Use this event to respond to item selection, implement custom navigation logic, or trigger application-specific actions. The event provides access to the clicked data item through "PanelBarItemClickEventArgs".

Declaration

[Parameter]
public EventCallback<PanelBarItemClickEventArgs> OnItemClick { get; set; }

Property Value

Fires during the rendering of each PanelBar item, allowing you to apply custom CSS classes or styling based on the data item. Use this event to conditionally style items, add visual indicators, or apply business logic-based appearance changes. Provides access to the item data and rendering context through "PanelBarItemRenderEventArgs".

Declaration

[Parameter]
public Action<PanelBarItemRenderEventArgs> OnItemRender { get; set; }

Property Value

Configures data binding settings for hierarchical data structures by specifying field names and templates for each level. Use this to map data properties to PanelBar item properties such as text, icon, URL, and disabled state. Children: "PanelBarBinding".

Declaration

[Parameter]
public RenderFragment PanelBarBindings { get; set; }

Property Value

Declaration

protected override void BuildRenderTree(RenderTreeBuilder __builder)

Parameters

Overrides ComponentBase.BuildRenderTree(RenderTreeBuilder)

Declaration

protected override Task OnAfterRenderAsync(bool firstRender)

Parameters

Returns

Overrides BaseComponent.OnAfterRenderAsync(bool)

Declaration

protected override void OnParametersSet()

Overrides ComponentBase.OnParametersSet()

Declaration

public override Task SetParametersAsync(ParameterView parameters)

Parameters

Returns

Overrides DataBoundComponent<object>.SetParametersAsync(ParameterView)