TreeMapFlatDataAdapter.ValueDataMember Property

Gets or sets the name of the data field whose values are used to automatically generate TreeMapItem.Value values.

Namespace: DevExpress.XtraTreeMap

Assembly: DevExpress.XtraTreeMap.v23.2.dll

NuGet Package: DevExpress.TreeMap

Declaration

C#

[DefaultValue("")]
[XtraSerializableProperty]
public string ValueDataMember { get; set; }

VB.NET

<DefaultValue("")>
<XtraSerializableProperty>
Public Property ValueDataMember As String

Property Value

Type	Default	Description
String	String.Empty	A String value.

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.

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