IChartDataAdapter.DataSorted Property
Gets or sets the value that identifies whether the source data is sorted.
Namespace: DevExpress.XtraCharts
Assembly: DevExpress.XtraCharts.v24.1.dll
NuGet Package: DevExpress.Charts
Declaration
Property Value
Type | Description |
---|---|
Boolean | true if the source data is sorted; otherwise, false. |
Example
How to: Implement a Custom Chart Data Adapter
This example shows how to create an adapter that loads numeric data to the chart:
using DevExpress.XtraCharts;
using System;
using System.Collections.Generic;
using System.Windows.Forms;
namespace CustomDataAdapter {
public partial class Form1 : Form {
const long DataItemCount = 100000;
const int MaxValue = 100;
const int MinValue = 80;
Random rand = new Random();
public Form1() {
InitializeComponent();
Series series = new Series("Series", ViewType.Line);
chartControl1.Series.Add(series);
List<DataItem> dataItems = new List<DataItem>();
for (int i = 0; i < DataItemCount; i++) {
dataItems.Add(new DataItem(i, rand.NextDouble() * (MaxValue - MinValue) + MaxValue));
}
series.DataAdapter = new CustomNumericDataAdapter(dataItems);
((XYDiagram)chartControl1.Diagram).AxisY.WholeRange.AlwaysShowZeroLevel = false;
}
}
public class DataItem {
public double Argument { get; }
public double Value { get; }
public DataItem(double argument, double value) {
Argument = argument;
Value = value;
}
}
public class CustomNumericDataAdapter : ISeriesAdapter {
readonly IList<DataItem> items;
public bool DataSorted => true;
public int ItemsCount => this.items.Count;
public CustomNumericDataAdapter(IList<DataItem> items) {
this.items = items;
}
event NotifyChartDataChangedEventHandler IChartDataAdapter.DataChanged {
add { }
remove { }
}
public object Clone() {
return this;
}
public double GetNumericalValue(int index, ChartDataMemberType dataMember) {
switch (dataMember) {
case ChartDataMemberType.Argument: return items[index].Argument;
case ChartDataMemberType.Value: return items[index].Value;
}
return double.NaN;
}
public object GetSourceObject(int index) {
return this.items[index];
}
public ActualScaleType GetScaleType(ChartDataMemberType dataMember) {
return ActualScaleType.Numerical;
}
public DateTime GetDateTimeValue(int index, ChartDataMemberType dataMember) {
throw new NotImplementedException();
}
public string GetQualitativeValue(int index, ChartDataMemberType dataMember) {
throw new NotImplementedException();
}
public TimeSpan GetTimeSpanValue(int index, ChartDataMemberType dataMember) {
throw new NotImplementedException();
}
public object GetObjectValue(int index, ChartDataMemberType dataMember) {
throw new NotImplementedException();
}
}
}
See Also