SunburstDataMapping.ChildrenDataMember Property

Gets or sets the data member whose values are used to create child sectors at the current Sunburst level.

Namespace: DevExpress.Xpf.TreeMap

Assembly: DevExpress.Xpf.TreeMap.v24.1.dll

NuGet Package: DevExpress.Wpf.TreeMap

Declaration

C#

public string ChildrenDataMember { get; set; }

VB.NET

Public Property ChildrenDataMember As String

Property Value

Type	Description
String	The name of a data member that is a source of Sunburst child sector data.

Example

This example loads data and creates a Sunburst chart based on a hierarchical data source. To do this, follow steps below:

• Initialize the SunburstControl.DataAdapter property with a SunburstHierarchicalDataAdapter object.
• Specify the DataSource property.
• Populate the SunburstHierarchicalDataAdapter.Mappings collection with SunburstDataMapping objects to configure how the Sunburst control should convert hierarchical data to sunburst sectors. The number of mappings is equal to the number of data source types you use in the Sunburst chart. Specify the following properties for each mapping:
  • SunburstDataMapping.LabelDataMember - Specifies a source of labels.
  • SunburstDataMapping.ValueDataMember (Optional for inner rings) - Specifies a source of values.
  • SunburstDataMapping.ChildrenDataMember property - Specifies a source of child items.
  • SunburstDataMapping.Type property - Specifies the type of objects at the current level.

XAML

<dxtm:SunburstControl>
  <dxtm:SunburstControl.DataAdapter>
      <dxtm:SunburstHierarchicalDataAdapter
              x:Name="dataAdapter"
              DataSource="{Binding}">
          <dxtm:SunburstHierarchicalDataAdapter.Mappings>
              <dxtm:SunburstDataMapping                             
                      LabelDataMember="CountryName"
                      ChildrenDataMember="CityInfos"
                      Type="{x:Type local:CountryInfo}"/>
              <dxtm:SunburstDataMapping                               
                      LabelDataMember="CityName"
                      ChildrenDataMember="SaleInfos"
                      Type="{x:Type local:CityInfo}"/>
              <dxtm:SunburstDataMapping
                      ValueDataMember="Total"
                      LabelDataMember="Category"                             
                      Type="{x:Type local:ProductInfo}"/>
          </dxtm:SunburstHierarchicalDataAdapter.Mappings>
      </dxtm:SunburstHierarchicalDataAdapter>
  </dxtm:SunburstControl.DataAdapter>
</dxtm:SunburstControl>

C#

using System.Collections.Generic;
using System.Windows;

namespace HierarchicalSunburst {
    public partial class MainWindow : Window {
        public MainWindow() {
            InitializeComponent();
            DataContext = CreateInfos();
        }
        List<CountryInfo> CreateInfos() {
            List<CountryInfo> infos = new List<CountryInfo>();
            CountryInfo germanyInfo = new CountryInfo { CountryName = "Germany" };
            CityInfo leipzigInfo = new CityInfo { CityName = "Leipzig" };
            leipzigInfo.SaleInfos.AddRange(new List<ProductInfo> {
                new ProductInfo { Category = "Beverages", Total = 2634.5 },
                new ProductInfo { Category = "Baked Goods", Total = 4523.98 },
                new ProductInfo { Category = "Grains and Cereals", Total = 913.85 },
                new ProductInfo { Category = "Milk and Dairy", Total = 4219.98 },
            });
            CityInfo berlinInfo = new CityInfo { CityName = "Berlin" };
            berlinInfo.SaleInfos.AddRange(new List<ProductInfo> {
                new ProductInfo { Category = "Frozen Foods", Total = 900 }
            });
            germanyInfo.CityInfos.AddRange(new List<CityInfo> { leipzigInfo, berlinInfo });

            CountryInfo spainInfo = new CountryInfo { CountryName = "Spain" };
            CityInfo barcelonaInfo = new CityInfo { CityName = "Barcelona" };
            barcelonaInfo.SaleInfos.AddRange(new List<ProductInfo> {
                new ProductInfo { Category = "Baked Goods", Total = 1239.2 },
                new ProductInfo { Category = "Fruits", Total = 450.41 },
                new ProductInfo { Category = "Milk and Dairy", Total = 692.5 },
            });
            CityInfo madridInfo = new CityInfo { CityName = "Madrid" };
            madridInfo.SaleInfos.AddRange(new List<ProductInfo> {
                new ProductInfo { Category = "Spices", Total = 1010.30 },
                new ProductInfo { Category = "Vegetables", Total = 2078 }
            });
            spainInfo.CityInfos.AddRange(new List<CityInfo> { barcelonaInfo, madridInfo });

            infos.AddRange(new List<CountryInfo> { germanyInfo, spainInfo });

            return infos;
        }
    }
    public class CountryInfo {
        public string CountryName { get; set; }
        public List<CityInfo> CityInfos { get; set; } = new List<CityInfo>();
    }
    public class CityInfo {
        public string CityName { get; set; }
        public List<ProductInfo> SaleInfos { get; set; } = new List<ProductInfo>();
    }
    public class ProductInfo {
        public string Category { get; set; }
        public double Total { get; set; }
    }
}

VB.NET

Imports System.Collections.Generic

Namespace HierarchicalSunburst
    Public Partial Class MainWindow
        Inherits Window

        Public Sub New()
            InitializeComponent()
            DataContext = CreateInfos()
        End Sub

        Private Function CreateInfos() As List(Of CountryInfo)
            Dim infos As List(Of CountryInfo) = New List(Of CountryInfo)()
            Dim germanyInfo As CountryInfo = New CountryInfo With {
                .CountryName = "Germany"
            }
            Dim leipzigInfo As CityInfo = New CityInfo With {
                .CityName = "Leipzig"
            }
            leipzigInfo.SaleInfos.AddRange(New List(Of ProductInfo) From {
                New ProductInfo With {
                    .Category = "Beverages",
                    .Total = 2634.5
                },
                New ProductInfo With {
                    .Category = "Baked Goods",
                    .Total = 4523.98
                },
                New ProductInfo With {
                    .Category = "Grains and Cereals",
                    .Total = 913.85
                },
                New ProductInfo With {
                    .Category = "Milk and Dairy",
                    .Total = 4219.98
                }
            })
            Dim berlinInfo As CityInfo = New CityInfo With {
                .CityName = "Berlin"
            }
            berlinInfo.SaleInfos.AddRange(New List(Of ProductInfo) From {
                New ProductInfo With {
                    .Category = "Frozen Foods",
                    .Total = 900
                }
            })
            germanyInfo.CityInfos.AddRange(New List(Of CityInfo) From {
                leipzigInfo,
                berlinInfo
            })
            Dim spainInfo As CountryInfo = New CountryInfo With {
                .CountryName = "Spain"
            }
            Dim barcelonaInfo As CityInfo = New CityInfo With {
                .CityName = "Barcelona"
            }
            barcelonaInfo.SaleInfos.AddRange(New List(Of ProductInfo) From {
                New ProductInfo With {
                    .Category = "Baked Goods",
                    .Total = 1239.2
                },
                New ProductInfo With {
                    .Category = "Fruits",
                    .Total = 450.41
                },
                New ProductInfo With {
                    .Category = "Milk and Dairy",
                    .Total = 692.5
                }
            })
            Dim madridInfo As CityInfo = New CityInfo With {
                .CityName = "Madrid"
            }
            madridInfo.SaleInfos.AddRange(New List(Of ProductInfo) From {
                New ProductInfo With {
                    .Category = "Spices",
                    .Total = 1010.30
                },
                New ProductInfo With {
                    .Category = "Vegetables",
                    .Total = 2078
                }
            })
            spainInfo.CityInfos.AddRange(New List(Of CityInfo) From {
                barcelonaInfo,
                madridInfo
            })
            infos.AddRange(New List(Of CountryInfo) From {
                germanyInfo,
                spainInfo
            })
            Return infos
        End Function
    End Class

    Public Class CountryInfo
        Public Property CountryName As String
        Public Property CityInfos As List(Of CityInfo) = New List(Of CityInfo)()
    End Class

    Public Class CityInfo
        Public Property CityName As String
        Public Property SaleInfos As List(Of ProductInfo) = New List(Of ProductInfo)()
    End Class

    Public Class ProductInfo
        Public Property Category As String
        Public Property Total As Double
    End Class
End Namespace

The image below shows the results: