HierarchicalDataMapping.ChildrenDataMember Property
Gets or sets the name of the data field whose values are used to specify child items of current level tree map or sunburst items.
Namespace: DevExpress.XtraTreeMap
Assembly: DevExpress.XtraTreeMap.v18.2.dll
Declaration
[DefaultValue(null)]
[XtraSerializableProperty]
public string ChildrenDataMember { get; set; }Property Value
| Type | Default | Description |
|---|---|---|
| String | *null* | A String value. |
Example
To provide hierarchical data to a TreeMap, create a TreeMapHierarchicalDataAdapter object and assign it to the TreeMapControl.DataAdapter property. Then, specify the adapter’s data source object using the TreeMapHierarchicalDataAdapter.DataSource property. To configure how hierarchical data should be converted to tree map items, use HierarchicalDataMapping objects. The HierarchicalDataMapping.LabelDataMember property allows you to specify a label data member, the HierarchicalDataMapping.ValueDataMember property - a value data member, the HierarchicalDataMapping.ChildrenDataMember property - a data member containing children items, and the HierarchicalDataMapping.Type property - the type of items on the current nesting level.
Note
A complete sample project is available at https://github.com/DevExpress-Examples/how-to-provide-hierarchical-data-to-treemap-t360961
void CreateTreeMapDataAdapter() {
TreeMapHierarchicalDataAdapter dataAdapter = new TreeMapHierarchicalDataAdapter();
dataAdapter.DataSource = CreateStatistics();
// Fill the Mappings collection using mappings specifying
// how to convert data objects to tree map items.
dataAdapter.Mappings.Add(new TreeMapHierarchicalDataMapping {
Type = typeof(CountryStatistics),
LabelDataMember = "Name",
ChildrenDataMember = "EnergyStatistics"
});
dataAdapter.Mappings.Add(new TreeMapHierarchicalDataMapping {
Type = typeof(EnergyInfo),
LabelDataMember = "Type",
ValueDataMember = "Value"
});
treeMap.DataAdapter = dataAdapter;
}