wpf-devexpress-dot-xpf-dot-grid-dot-treelistview-c000f98b.md
Gets or sets a selector that chooses a node image based on custom logic. This is a dependency property.
Namespace : DevExpress.Xpf.Grid
Assembly : DevExpress.Xpf.Grid.v25.2.dll
NuGet Package : DevExpress.Wpf.Grid.Core
public TreeListNodeImageSelector NodeImageSelector { get; set; }
Public Property NodeImageSelector As TreeListNodeImageSelector
| Type | Description |
|---|---|
| DevExpress.Xpf.Grid.TreeListNodeImageSelector |
A DevExpress.Xpf.Grid.TreeListNodeImageSelector descendant that chooses a node image based on custom logic.
|
Run Demo: End-User Customization
The following code sample demonstrates how to use the NodeImageSelector to display different images based on the node level:
<Window.Resources>
<local:EmployeeTaskImageSelector x:Key="taskImageSelector"/>
</Window.Resources>
<Grid>
<dxg:TreeListControl ...>
<!-- ... -->
<dxg:TreeListControl.View>
<dxg:TreeListView ...
ShowNodeImages="True"
NodeImageSelector="{StaticResource taskImageSelector}">
</dxg:TreeListView>
</dxg:TreeListControl.View>
</dxg:TreeListControl>
</Grid>
public class EmployeeTaskImageSelector : DevExpress.Xpf.Grid.TreeListNodeImageSelector {
static ImageSource GetSvgImage(string imageName) {
var extension = new SvgImageSourceExtension() {
Uri = new Uri(string.Format("pack://application:,,,/IsReadOnlyBindingExample;component/Images/{0}.svg", imageName)),
Size = new System.Windows.Size(16, 16)
};
return (ImageSource)extension.ProvideValue(null);
}
static List<ImageSource> TaskImages;
static EmployeeTaskImageSelector() {
TaskImages = new List<ImageSource>();
TaskImages.Add(GetSvgImage("Task"));
TaskImages.Add(GetSvgImage("Note"));
}
public override ImageSource Select(TreeListRowData rowData) {
if(rowData.Level == 0)
return TaskImages[0];
return TaskImages[1];
}
}
Public Class EmployeeTaskImageSelector
Inherits DevExpress.Xpf.Grid.TreeListNodeImageSelector
Private Shared Function GetSvgImage(ByVal imageName As String) As ImageSource
Dim extension = New SvgImageSourceExtension() With {
.Uri = New Uri(String.Format("pack://application:,,,/IsReadOnlyBindingExample;component/Images/{0}.svg", imageName)),
.Size = New System.Windows.Size(16, 16)
}
Return CType(extension.ProvideValue(Nothing), ImageSource)
End Function
Private Shared TaskImages As List(Of ImageSource)
Shared Sub New()
TaskImages = New List(Of ImageSource)()
TaskImages.Add(GetSvgImage("Task"))
TaskImages.Add(GetSvgImage("Note"))
End Sub
Public Overrides Function [Select](ByVal rowData As TreeListRowData) As ImageSource
If rowData.Level = 0 Then
Return TaskImages(0)
End If
Return TaskImages(1)
End Function
End Class
Note
An image specified by the TreeListNode.Image property takes priority over an image specified by the NodeImageSelector.
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the NodeImageSelector property.
Note
The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.
wpf-grid-read-only-and-enabled-binding/CS/MainWindow.xaml#L47
ShowNodeImages="True"
NodeImageSelector="{StaticResource taskImageSelector}"
UseLegacyFilterPanel="False">
See Also