TreeViewExtensions

Namespace: Wisej.Web.Markup

Assembly: Wisej.Framework (4.1.0.0)

Adds fluent markup extension methods to the TreeView class.

C#

public class TreeViewExtensions

VB.NET

Public Class TreeViewExtensions

Methods

Nodes<TTreeView>(treeView, nodes)

Adds an array of root nodes to the specified TreeView.

Parameter	Type	Description
TTreeView		The type of the tree view, which must inherit from TreeView.
treeView	TTreeView	The tree view to which the root nodes will be added.
nodes	TreeNode[]	An array of tree nodes to be added as root nodes.

Returns: TTreeView. The tree view with the updated root nodes.

This method allows you to add multiple root nodes to a tree view control.

myTreeView.Nodes(new TreeNode("Root1"), new TreeNode("Root2"));

OnAfterCheck<TTreeView>(treeView, action)

Extension method to attach an action to the AfterCheck event of a TreeView.

Parameter	Type	Description
TTreeView		The type of the TreeView, which must inherit from TreeView.
treeView	TTreeView	The TreeView instance to attach the event handler to.
action	Action<TTreeView, TreeViewEventArgs>	The action to execute when the AfterCheck event is triggered.

Returns: TTreeView. The original TreeView instance with the event handler attached.

This method allows you to execute a custom action whenever a node in the TreeView is checked or unchecked.

treeView.OnAfterCheck((tv, e) => {
// Custom logic here
});

OnAfterCollapse<TTreeView>(treeView, action)

Extension method to attach an action to the AfterCollapse event of a TreeView.

Parameter	Type	Description
TTreeView		The type of the TreeView, which must inherit from TreeView.
treeView	TTreeView	The TreeView instance to attach the event handler to.
action	Action<TTreeView, TreeViewEventArgs>	The action to execute when the AfterCollapse event is triggered.

Returns: TTreeView. The original TreeView instance with the event handler attached.

This method allows you to execute a custom action whenever a node in the TreeView is collapsed.

treeView.OnAfterCollapse((tv, e) => {
// Custom logic here
});

OnAfterExpand<TTreeView>(treeView, action)

Attaches an action to be executed after a node is expanded in the TreeView.

Parameter	Type	Description
TTreeView		The type of the TreeView.
treeView	TTreeView	The TreeView instance to configure.
action	Action<TTreeView, TreeViewEventArgs>	The action to execute after a node is expanded.

Returns: TTreeView. The configured TreeView instance.

This method allows you to specify an action that will be executed after a node is expanded in the TreeView.

var treeView = new TreeView();
treeView.OnAfterExpand((tv, e) => { /* action */ });

OnAfterSelect<TTreeView>(treeView, action)

Attaches an action to be executed after a node is selected in the TreeView.

Parameter	Type	Description
TTreeView		The type of the TreeView.
treeView	TTreeView	The TreeView instance to configure.
action	Action<TTreeView, TreeViewEventArgs>	The action to execute after a node is selected.

Returns: TTreeView. The configured TreeView instance.

This method allows you to specify an action that will be executed after a node is selected in the TreeView.

var treeView = new TreeView();
treeView.OnAfterSelect((tv, e) => { /* action */ });

OnBeforeCheck<TTreeView>(treeView, action)

Extension method to attach an action to the BeforeCheck event of a TreeView.

Parameter	Type	Description
TTreeView		The type of the TreeView, which must inherit from TreeView.
treeView	TTreeView	The TreeView instance to attach the event handler to.
action	Action<TTreeView, TreeViewCancelEventArgs>	The action to execute when the BeforeCheck event is triggered.

Returns: TTreeView. The original TreeView instance with the event handler attached.

This method allows you to execute a custom action before a node in the TreeView is checked or unchecked.

treeView.OnBeforeCheck((tv, e) => {
// Custom logic here
});

OnBeforeCollapse<TTreeView>(treeView, action)

Extension method to attach an action to the BeforeCollapse event of a TreeView.

Parameter	Type	Description
TTreeView		The type of the TreeView, which must inherit from TreeView.
treeView	TTreeView	The TreeView instance to attach the event handler to.
action	Action<TTreeView, TreeViewCancelEventArgs>	The action to execute when the BeforeCollapse event is triggered.

Returns: TTreeView. The original TreeView instance with the event handler attached.

This method allows you to execute a custom action before a node in the TreeView is collapsed.

treeView.OnBeforeCollapse((tv, e) => {
// Custom logic here
});

OnBeforeExpand<TTreeView>(treeView, action)

Attaches an action to be executed before a node is expanded in the TreeView.

Parameter	Type	Description
TTreeView		The type of the TreeView.
treeView	TTreeView	The TreeView instance to configure.
action	Action<TTreeView, TreeViewCancelEventArgs>	The action to execute before a node is expanded.

Returns: TTreeView. The configured TreeView instance.

This method allows you to specify an action that will be executed before a node is expanded in the TreeView.

var treeView = new TreeView();
treeView.OnBeforeExpand((tv, e) => { /* action */ });

OnBeforeSelect<TTreeView>(treeView, action)

Attaches an action to be executed before a node is selected in the TreeView.

Parameter	Type	Description
TTreeView		The type of the TreeView.
treeView	TTreeView	The TreeView instance to configure.
action	Action<TTreeView, TreeViewCancelEventArgs>	The action to execute before a node is selected.

Returns: TTreeView. The configured TreeView instance.

This method allows you to specify an action that will be executed before a node is selected in the TreeView.

var treeView = new TreeView();
treeView.OnBeforeSelect((tv, e) => { /* action */ });

ShowLoader<TTreeView>(treeView, value)

Sets the loader visibility of the TreeView.

Parameter	Type	Description
TTreeView		The type of the TreeView.
treeView	TTreeView	The TreeView instance to configure.
value	Boolean	A boolean value indicating whether the loader should be shown.

Returns: TTreeView. The configured TreeView instance.

This method allows you to show or hide a loader on a TreeView.

var treeView = new TreeView();
treeView.ShowLoader(true);

VirtualScroll<TTreeView>(treeView, value)

Sets the virtual scrolling capability of the TreeView.

Parameter	Type	Description
TTreeView		The type of the TreeView.
treeView	TTreeView	The TreeView instance to configure.
value	Boolean	A boolean value indicating whether virtual scrolling should be enabled.

Returns: TTreeView. The configured TreeView instance.

This method allows you to enable or disable virtual scrolling on a TreeView.

var treeView = new TreeView();
treeView.VirtualScroll(true);