wpf-devexpress-dot-xpf-dot-charts-dot-datamembersummaryfunction.md
Gets or sets the data source field that provides data to be aggregated.
Namespace : DevExpress.Xpf.Charts
Assembly : DevExpress.Xpf.Charts.v25.2.dll
NuGet Package : DevExpress.Wpf.Charts
public string ValueDataMember { get; set; }
Public Property ValueDataMember As String
| Type | Description |
|---|---|
| String |
The string that is the data field name.
|
The Series.ValueDataMember property value is ignored if the DataMemberSummaryFunction.ValueDataMember is specified.
The example demonstrates how to apply AverageSummaryFunction to aggregate data points.
Use the following API members to configure the summary function options:
| Member | Description |
|---|---|
| Series.Summary | Gets or sets the series data point summarization settings. |
| Summary | Stores the series data point summarize options. |
| Summary.Function | Specifies the summary function that calculates data point values. |
| AverageSummaryFunction | The summary function that calculates the average of data point values. |
DataMemberSummaryFunction.ValueDataMember | Gets or sets the data source field that provides data to be aggregated. |
<Window.DataContext>
<local:ChartViewModel/>
</Window.DataContext>
<Grid>
<dxc:ChartControl>
<dxc:XYDiagram2D SeriesItemsSource="{Binding SaleSeries}">
<dxc:XYDiagram2D.SeriesItemTemplate>
<DataTemplate>
<dxc:PointSeries2D DataSource="{Binding Values}"
ArgumentDataMember="Category"
ValueDataMember="Value">
<!-- Configure the summary function options. -->
<dxc:PointSeries2D.Summary>
<dxc:Summary>
<dxc:Summary.Function>
<dxc:AverageSummaryFunction ValueDataMember="Value"/>
</dxc:Summary.Function>
</dxc:Summary>
</dxc:PointSeries2D.Summary>
<!--...-->
<dxc:PointSeries2D.Label>
<dxc:SeriesLabel Visible="True" TextPattern="Average: ${V}M"
dxc:MarkerSeries2D.Angle="90" ResolveOverlappingMode="JustifyAroundPoint"/>
</dxc:PointSeries2D.Label>
</dxc:PointSeries2D>
</DataTemplate>
</dxc:XYDiagram2D.SeriesItemTemplate>
<dxc:XYDiagram2D.AxisX>
<dxc:AxisX2D TickmarksMinorVisible="False"/>
</dxc:XYDiagram2D.AxisX>
<dxc:XYDiagram2D.AxisY>
<dxc:AxisY2D Interlaced="False">
<dxc:AxisY2D.WholeRange>
<dxc:Range dxc:AxisY2D.AlwaysShowZeroLevel="False"/>
</dxc:AxisY2D.WholeRange>
<dxc:AxisY2D.Label>
<dxc:AxisLabel TextPattern="${V}M"/>
</dxc:AxisY2D.Label>
</dxc:AxisY2D>
</dxc:XYDiagram2D.AxisY>
</dxc:XYDiagram2D>
<dxc:ChartControl.Titles>
<dxc:Title Content="Product Sales" HorizontalAlignment="Center" FontSize="14"/>
</dxc:ChartControl.Titles>
</dxc:ChartControl>
</Grid>
public class ChartViewModel {
public IEnumerable<SaleSeries> SaleSeries { get; private set; }
public ChartViewModel() {
SaleSeries = new Collection<SaleSeries> {
new SaleSeries {
Values = new Collection<SaleInfo> {
new SaleInfo { Category= "Video players", Region = "Asia", Value = 853},
new SaleInfo { Category= "Video players", Region = "Australia", Value = 321},
new SaleInfo { Category= "Video players", Region = "Europe", Value = 655},
new SaleInfo { Category= "Video players", Region = "North America", Value = 1325},
new SaleInfo { Category= "Video players", Region = "South America", Value = 653},
new SaleInfo { Category= "Automation", Region = "Asia", Value = 172},
new SaleInfo { Category= "Automation", Region = "Australia", Value = 255},
new SaleInfo { Category= "Automation", Region = "Europe", Value = 981D},
new SaleInfo { Category= "Automation", Region = "North America", Value = 963D},
new SaleInfo { Category= "Automation", Region = "South America", Value = 123D},
new SaleInfo { Category= "Monitors", Region = "Asia", Value = 1011D},
new SaleInfo { Category= "Monitors", Region = "Australia", Value = 359D},
new SaleInfo { Category= "Monitors", Region = "Europe", Value = 721D},
new SaleInfo { Category= "Monitors", Region = "North America", Value = 565D},
new SaleInfo { Category= "Monitors", Region = "South America", Value = 532D},
new SaleInfo { Category= "Projectors", Region = "Asia", Value = 998D},
new SaleInfo { Category= "Projectors", Region = "Australia", Value = 222D},
new SaleInfo { Category= "Projectors", Region = "Europe", Value = 865D},
new SaleInfo { Category= "Projectors", Region = "North America", Value = 787D},
new SaleInfo { Category= "Projectors", Region = "South America", Value = 332D},
new SaleInfo { Category= "Televisions", Region = "Asia", Value = 1356D},
new SaleInfo { Category= "Televisions", Region = "Australia", Value = 232D},
new SaleInfo { Category= "Televisions", Region = "Europe", Value = 1323D},
new SaleInfo { Category= "Televisions", Region = "North America", Value = 1125D},
new SaleInfo { Category= "Televisions", Region = "South America", Value = 865D}
}
}
};
}
}
public class SaleSeries {
public IEnumerable<SaleInfo> Values { get; set; }
}
public class SaleInfo {
public string Category { get; set; }
public string Region { get; set; }
public double Value { get; set; }
}
Public Class ChartViewModel
Public Property SaleSeries As IEnumerable(Of SaleSeries)
Public Sub New()
SaleSeries = New Collection(Of SaleSeries) From {
New SaleSeries With {
.Values = New Collection(Of SaleInfo) From {
New SaleInfo With { .Category = "Video players", .Region = "Asia", .Value = 853R },
New SaleInfo With { .Category = "Video players", .Region = "Australia", .Value = 321R },
New SaleInfo With { .Category = "Video players", .Region = "Europe", .Value = 655R },
New SaleInfo With { .Category = "Video players", .Region = "North America", .Value = 1325R },
New SaleInfo With { .Category = "Video players", .Region = "South America", .Value = 653R },
New SaleInfo With { .Category = "Automation", .Region = "Asia", .Value = 172R },
New SaleInfo With { .Category = "Automation", .Region = "Australia", .Value = 255R },
New SaleInfo With { .Category = "Automation", .Region = "Europe", .Value = 981R },
New SaleInfo With { .Category = "Automation", .Region = "North America", .Value = 963R },
New SaleInfo With { .Category = "Automation", .Region = "South America", .Value = 123R },
New SaleInfo With { .Category = "Monitors", .Region = "Asia", .Value = 1011R },
New SaleInfo With { .Category = "Monitors", .Region = "Australia", .Value = 359R },
New SaleInfo With { .Category = "Monitors", .Region = "Europe", .Value = 721R },
New SaleInfo With { .Category = "Monitors", .Region = "North America", .Value = 565R },
New SaleInfo With { .Category = "Monitors", .Region = "South America", .Value = 532R },
New SaleInfo With { .Category = "Projectors", .Region = "Asia", .Value = 998R },
New SaleInfo With { .Category = "Projectors", .Region = "Australia", .Value = 222R },
New SaleInfo With { .Category = "Projectors", .Region = "Europe", .Value = 865R },
New SaleInfo With { .Category = "Projectors", .Region = "North America", .Value = 787R },
New SaleInfo With { .Category = "Projectors", .Region = "South America", .Value = 332R },
New SaleInfo With { .Category = "Televisions", .Region = "Asia", .Value = 1356R },
New SaleInfo With { .Category = "Televisions", .Region = "Australia", .Value = 232R },
New SaleInfo With { .Category = "Televisions", .Region = "Europe", .Value = 1323R },
New SaleInfo With { .Category = "Televisions", .Region = "North America", .Value = 1125R },
New SaleInfo With { .Category = "Televisions", .Region = "South America", .Value = 865R }
}
}
}
End Sub
End Class
Public Class SaleSeries
Public Property Values As IEnumerable(Of SaleInfo)
End Class
Public Class SaleInfo
Public Property Category As String
Public Property Region As String
Public Property Value As Double
End Class
See Also
DataMemberSummaryFunction Class