SankeyDiagramControl.DataSource Property

Specifies the object from which the Sankey Diagram Control retrieves its data items.

Namespace: DevExpress.Xpf.Charts.Sankey

Assembly: DevExpress.Xpf.Charts.v25.1.dll

NuGet Package: DevExpress.Wpf.Charts

Declaration

C#

public object DataSource { get; set; }

VB.NET

Public Property DataSource As Object

Property Value

Type	Description
Object	The data source object.

Remarks

You can set the DataSource property to an object that implements any of the following interfaces: IList, IListSource, or IBindingList.

To bind Sankey Diagram Control to a data source, you also need to specify the names of data members that store data for source nodes, target nodes, and weights:

• SourceDataMember - Specifies the name of a data member that contains source node labels.

• TargetDataMember - Specifies the name of a data member that contains target node labels.

• WeightDataMember (Optional) - Specifies the name of a data member that contains link weights. If the WeightDataMember property is not specified, weights are equal to 1.

XAML

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:SankeySample"
        xmlns:dxsa="http://schemas.devexpress.com/winfx/2008/xaml/sankey" 
        x:Class="SankeySample.MainWindow"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <dxsa:SankeyDiagramControl DataSource="{Binding Data}" 
                                   SourceDataMember="Source" 
                                   TargetDataMember="Target" 
                                   WeightDataMember="Value">
            <dxsa:SankeyDiagramControl.DataContext>
                <local:SankeyViewModel/>
            </dxsa:SankeyDiagramControl.DataContext>
        </dxsa:SankeyDiagramControl>
    </Grid>
</Window>

C#

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

namespace SankeySample {
//...
    public class SankeyViewModel {
        public List<SankeyItem> Data {
            get { return GetData(); }
        }
        public List<SankeyItem> GetData() {
            List<SankeyItem> data = new List<SankeyItem>{                
                new SankeyItem { Source = "France", Target = "UK", Value = 53 },
                new SankeyItem { Source = "Australia", Target = "UK", Value = 72 },
                new SankeyItem { Source = "France", Target = "Canada", Value = 81 },
                new SankeyItem { Source = "China", Target = "Canada", Value = 96 },
                new SankeyItem { Source = "UK", Target = "France", Value = 61 },
                new SankeyItem { Source = "Canada", Target = "France", Value = 89 } 
            };
            return data;
        }
    }
    public class SankeyItem {
        public string Source { get; set; }
        public string Target { get; set; }
        public double Value { get; set; }
    }
}

VB.NET

Imports System.Collections.Generic

Namespace SankeySample
    '...
    Public Class SankeyViewModel
        Public ReadOnly Property Data As List(Of SankeyItem)
            Get
                Return GetData()
            End Get
        End Property

        Public Function GetData() As List(Of SankeyItem)
            Dim data As List(Of SankeyItem) = New List(Of SankeyItem) From {
                New SankeyItem With {
                    .Source = "France", .Target = "UK", .Value = 53
                },
                New SankeyItem With {
                    .Source = "Australia", .Target = "UK", .Value = 72
                },
                New SankeyItem With {
                    .Source = "France", .Target = "Canada", .Value = 81
                },
                New SankeyItem With {
                    .Source = "China", .Target = "Canada", .Value = 96
                },
                New SankeyItem With {
                    .Source = "UK", .Target = "France", .Value = 61
                },
                New SankeyItem With {
                    .Source = "Canada", .Target = "France", .Value = 89
                }
            }
            Return data
        End Function
    End Class

    Public Class SankeyItem
        Public Property Source As String
        Public Property Target As String
        Public Property Value As Double
    End Class
End Namespace

Result: