SankeyDiagramControl.WeightDataMember Property

Specifies the name of a data member that contains link weights.

Namespace: DevExpress.Xpf.Charts.Sankey

Assembly: DevExpress.Xpf.Charts.v20.2.dll

NuGet Packages: DevExpress.WindowsDesktop.Wpf.Charts, DevExpress.Wpf.Charts

Declaration

C#

public string WeightDataMember { get; set; }

VB.NET

Public Property WeightDataMember As String

Property Value

Type	Description
String	The name of a data member that contains link weights.

Remarks

If the WeightDataMember property is not specified, link weights are equal to 1.

The following example shows how to bind Sankey Diagram Control and specify the SourceDataMember, TargetDataMember, and WeightDataMember properties:

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: