TreeMapFlatDataAdapter Class

The data adapter that provides flat data to a tree map.

Namespace: DevExpress.XtraTreeMap

Assembly: DevExpress.XtraTreeMap.v20.2.dll

NuGet Package: DevExpress.TreeMap

Declaration

C#

public class TreeMapFlatDataAdapter :
    TreeMapDataAdapterBase,
    IFlatDataAdapter,
    IDataSourceProvider,
    IGroupIndexProvider

VB.NET

Public Class TreeMapFlatDataAdapter
    Inherits TreeMapDataAdapterBase
    Implements IFlatDataAdapter,
               IDataSourceProvider,
               IGroupIndexProvider

Remarks

This data adapter introduces the TreeMapFlatDataAdapter.DataSource property that allows you to specify the data source of the adapter, and the TreeMapFlatDataAdapter.DataMember, TreeMapFlatDataAdapter.LabelDataMember and TreeMapFlatDataAdapter.ValueDataMember properties, allowing you to specify the data members whose values are used as an item, item’s label and item’s value.

For more information about Data Adapters, refer to the Providing Data topic.

Example

To provide flat data to a TreeMap, create a TreeMapFlatDataAdapter object and assign it to the TreeMapControl.DataAdapter property. Then, specify the adapter’s TreeMapFlatDataAdapter.DataSource, TreeMapFlatDataAdapter.LabelDataMember and TreeMapFlatDataAdapter.ValueDataMember to configure the data source object and which data members should be used to generate tree map items. If you need to group generated items, add the name of a data member whose values should be used to group items, to the TreeMapFlatDataAdapter.GroupDataMembers collection.

View Example

Form1.cs

void ConfigureTreeMapDataAdapter() {
    TreeMapFlatDataAdapter adapter = new TreeMapFlatDataAdapter {
        DataSource = CreateBillionaireInfos(),
        LabelDataMember = "Name",
        ValueDataMember = "NetWorth"
    };
    adapter.GroupDataMembers.Add("Residence");
    treeMap.DataAdapter = adapter;
}

Form1.vb

Private Sub ConfigureTreeMapDataAdapter()
    Dim adapter As TreeMapFlatDataAdapter = New TreeMapFlatDataAdapter With {.DataSource = CreateBillionaireInfos(), .LabelDataMember = "Name", .ValueDataMember = "NetWorth"}
    adapter.GroupDataMembers.Add("Residence")
    treeMap.DataAdapter = adapter
End Sub

Implements

ITreeMapDataAdapter

Inheritance

Object

HierarchicalElement

TreeMapElement

TreeMapDataAdapterBase

TreeMapFlatDataAdapter