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View this topic on docs.devexpress.com (Learn more)

TreeListNode.ImageIndex Property

Gets or sets the index of the node's select image from the TreeList.SelectImageList collection displayed when this node is not focused.

Namespace:DevExpress.XtraTreeList.Nodes
Assembly:DevExpress.XtraTreeList.v19.2.dll

Expanded Syntax

Property value

Type: Int32
An integer value that specifies the zero-based index of the select image displayed when this node is not focused.
The default is 0.

Expanded Remarks

Nodes can display the following icons:

  • Select Image - two icons that automatically switch when a node gets / loses the focus.
  • State Image - any custom icon.

Expanded Select Image

Specify image source

The TreeList.SelectImageList property specifies an ordered (indexed) collection that stores images. You can use the following image collections:

Assign images to nodes

To specify the index of the image displayed in a particular node, use the following properties and events:

  • the TreeList.ImageIndexFieldName property — specifies the name of the data field that contains image indexes. The property specifies the image index for both non-focused and focused states (you cannot use data source fields to specify two icons).

  • the ImageIndex and SelectImageIndex properties — get or set the node's image index in the non-focused and focused states, respectively. Images are automatically changed when a node gets / loses the focus.

  • the TreeList.GetSelectImage event — fires before a node is displayed and allows you to specify (override) the image index for the processed node.

If the index is out of range, no image is displayed.

Respond to clicks

The TreeList.RowSelectImageClick event fires when a select image is clicked.

Expanded Example

The code below shows how to assign select and state images to nodes.

Expanded See Also

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