Getting Started
EO.Pdf
EO.Web
- Overview
- Installation & Deployement
- EO.Web ToolTip
- EO.Web Rating
- EO.Web Slider & RangeSlider
- EO.Web ListBox
- EO.Web ComboBox
- EO.Web Captcha
- EO.Web ASPX To PDF
- EO.Web Slide
- EO.Web Flyout
- EO.Web EditableLabel
- EO.Web ImageZoom
- EO.Web Floater
- EO.Web Downloader
- EO.Web ColorPicker
- EO.Web HTML Editor
- EO.Web File Explorer
- EO.Web SpellChecker
- EO.Web Grid
- EO.Web MaskedEdit
- EO.Web Splitter
- EO.Web Menu
- EO.Web Slide Menu
- EO.Web TabStrip
- EO.Web TreeView
  - EO.Web TreeView
  - Overview
  - Using EO.Web TreeView
    - TreeNode and TreeNodeGroup
    - Look, Skin and Theme
    - Style and Appearance
    - Data Binding
    - Handling Event
- EO.Web Calendar
- EO.Web Callback
- EO.Web MultiPage
- EO.Web Dialog
- EO.Web AJAXUploader
- EO.Web ProgressBar - Free!
- EO.Web ToolBar - Free!
EO.WebBrowser
EO.Wpf
Common Topics
Reference

Table of Contents

TreeNode

Apply to

TreeView

Overview

An EO.Web TreeView is made up of a hierarchy of tree nodes represented by TreeNode object, which controls tree node's appearance and behavior. TreeNode is highly customizable:

There are two kinds of TreeNodes:

Normal TreeNode with HTML Text
Custom TreeNode with ASP.NET controls

Normal TreeNode with HTML Text

A normal TreeNode can contain MarginImage, Image, CheckBox and Text:

A Normal TreeNode

A TreeNode has the following states: Normal, Hover, Expanded, Selected, SelectedHover, SelectedExpanded and Disabled. See item states topic for detail.

You can also specify different styles for each state. For example, NormalStyle, HoverStyle, SelectedStyle. It's not neccessary to provide styles settings for every states. For example, if ExpandedStyle is not specified, HoverStyle is used.

Tip: Always try to use look item to specify styles.

Custom TreeNode with ASP.NET controls

CustomItem is used to host one or more ASP.NET web controls, such as Calendar, ColorPicker. You can put HTML tags inside a CustomItem tag. To associate a CustomItem with a TreeNode, specify the TreeNode's CustomItemID property to the ID of the CustomItem. The content of the CustomItem is displayed as the content of the TreeNode.

You can also bind data source to a CustomItem and include the custom item as part of the template item that is used to generate data binding items. See Data Binding for details.

Note: When CustomItem is used, Text property is ignored.

For details on how to use CustomItem, please refer to Custom Item Overview topic.

Properties specific for TreeNode

The following table shows the properties that are specific to TreeView:

Content	Remarks
CollapsedImageUrl and ExpandedImageUrl	Represent URLs of images when tree node is collapsed or expanded.
ImageUrl	Specifies the URL of an image associated with this TreeNode and display next to the TreeNode's text.
MarginImageUrl	Specifies the URL of an image associated with this TreeNode and display at the left margin of the TreeView.
PopulateOnDemand	Populates a group of TreeNodes only when the parent node is expanded. The request to generate the group of TreeNodes are sent via AJAX callback.
ShowCheckBox	Display a Checkbox on this TreeNode. Checkbox image can be specified in TreeView's CheckBoxImages.