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TreeView.ImageKey Property

Gets or sets the key of the default image for each node in the TreeView control when it is in an unselected state.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

[RelatedImageListAttribute("ImageList")]
[TypeConverterAttribute(typeof(ImageKeyConverter))]
public string ImageKey { get; set; }

Property Value

Type: System.String
The key of the default image shown for each node TreeView control when the node is in an unselected state.

The ImageKey property is case-insensitive.

If a TreeNode does not have an image set, the image specified by the ImageKey property will be shown when the node is not selected. When the node is selected, the first item in the ImageList will be shown.

The ImageKey and ImageIndex properties are mutually exclusive, meaning if one is set, the other is ignored. If you set the ImageKey property, the ImageIndex property is automatically set to -1. Alternatively, if you set the ImageIndex property, the ImageKey is automatically set to an empty string ("").

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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