TreeMapItem.Value Property
Gets or sets the tree map item value.
Namespace: DevExpress.XtraTreeMap
Assembly: DevExpress.XtraTreeMap.v20.1.dll
NuGet Package: DevExpress.Win.TreeMap
Declaration
Property Value
Type | Default | Description |
---|---|---|
Double | 0 | A Double value. |
Example
To manually provide data for a TreeMap, assign a newly created instance of the TreeMapItemStorage class to the TreeMapControl.DataAdapter property. Then, create several objects of the TreeMapItem class or its descendant class, specify their TreeMapItem.Label and TreeMapItem.Value
properties, and add them to the TreeMapItemStorage.Items collection.
Note – to create a group, you will need to add a new TreeMapItem and fill its TreeMapItem.Children collection with tree map items.
Note
A complete sample project is available at https://github.com/DevExpress-Examples/how-to-manually-populate-treemap-with-data-t360867
void ConfigureTreeMapDataAdapter() {
TreeMapItemStorage storage = new TreeMapItemStorage();
treeMap.DataAdapter = storage;
TreeMapItem americasGroup = new TreeMapItem { Label = "Americas" };
americasGroup.Children.Add(new TreeMapItem { Label = "United States", Value = 17.968 });
americasGroup.Children.Add(new TreeMapItem { Label = "Brazil", Value = 1.8 });
americasGroup.Children.Add(new TreeMapItem { Label = "Canada", Value = 1.573 });
storage.Items.Add(americasGroup);
TreeMapItem europeGroup = new TreeMapItem { Label = "Europe" };
europeGroup.Children.Add(new TreeMapItem { Label = "Germany", Value = 3.371 });
europeGroup.Children.Add(new TreeMapItem { Label = "United Kingdom", Value = 2.865 });
europeGroup.Children.Add(new TreeMapItem { Label = "France", Value = 2.423 });
europeGroup.Children.Add(new TreeMapItem { Label = "Italy", Value = 1.819 });
storage.Items.Add(europeGroup);
TreeMapItem asiaGroup = new TreeMapItem { Label = "Asia" };
asiaGroup.Children.Add(new TreeMapItem { Label = "China", Value = 11.385 });
asiaGroup.Children.Add(new TreeMapItem { Label = "Japan", Value = 4.116 });
asiaGroup.Children.Add(new TreeMapItem { Label = "India", Value = 2.183 });
storage.Items.Add(asiaGroup);
}
Related GitHub Examples
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the Value property.
Note
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