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How to create a real time Chart (SfChart) using MVVM in WPF

Platform: WPF |
Control: SfChart |
Published Date: April 17, 2020 |
Last Revised Date: April 20, 2020

This article describes how to create a real time chart in WPF. The following code example illustrates how to update the ItemsSource bound to chart series in real time use case.



<chart:SfChart x:Name="Chart" Margin="0,20,20,0" AreaBorderThickness="0,1,1,1">
                <chart:DateTimeAxis LabelFormat="hh:mm:ss">
                        <TextBlock Margin="10" Text="Time" FontSize="16" FontFamily="SegoeUI"/>
                <chart:NumericalAxis Minimum="1000" Maximum="1006" 
                                     Interval="1" >
                        <TextBlock Margin="10" Text="Value" FontSize="16" FontFamily="SegoeUI"/>
            <chart:FastLineBitmapSeries EnableAntiAliasing="False" Label="First" 
                                        XBindingPath="Date" YBindingPath="Value" 
                                        LegendIcon="SeriesType" StrokeThickness="1"
                                        ItemsSource="{Binding DynamicData}"/>
            <chart:FastLineBitmapSeries EnableAntiAliasing="False" Label="Second" 
                                        XBindingPath="Date" YBindingPath="Value1" 
                                        LegendIcon="SeriesType"   StrokeThickness="1"
                                        ItemsSource="{Binding DynamicData}"/>
            <chart:FastLineBitmapSeries EnableAntiAliasing="False" Label="Third" 
                                        XBindingPath="Date" YBindingPath="Value2" 
                                        LegendIcon="SeriesType"  StrokeThickness="1"
                                        ItemsSource="{Binding DynamicData}"/>




public class Data
        public Data(DateTime date, double value, double value1, double value2)
            Date = date;
            Value = value;
            Value1 = value1;
            Value2 = value2;
        public DateTime Date { get; set; }
        public double Value { get; set; }
        public double Value1 { get; set; }
        public double Value2 { get; set; }




public class DataGenerator
        private Random randomNumber;
        private ObservableCollection<Data> data = new ObservableCollection<Data>();
        public int dataCount = 50000;
        private int rate = 5;
        int index = 0;
        DispatcherTimer timer;
        public ObservableCollection<Data> DynamicData { get; set; }
        public DataGenerator()
            randomNumber = new Random();
            DynamicData = new ObservableCollection<Data>();
            data = GenerateData();
            timer = new DispatcherTimer();
            timer.Tick += timer_Tick;
            timer.Interval = new TimeSpan(0, 0, 0, 0, 50);
        public void AddData()
            for (int i = 0; i < rate; i++)
                if (index < 100)
                else if (index > 100)
                    DynamicData.Add(this.data[(index % (this.data.Count - 1))]);
        public void LoadData()
            for (int i = 0; i < 10; i++)
                if (index < data.Count)
        public ObservableCollection<Data> GenerateData()
            ObservableCollection<Data> generatedData = new ObservableCollection<Data>();
            DateTime date = new DateTime(2009, 1, 1);
            double value = 1000;
            double value1 = 1001;
            double value2 = 1002;
            for (int i = 0; i < this.dataCount; i++)
                generatedData.Add(new Data(date, value, value1, value2));
                date = date.Add(TimeSpan.FromSeconds(5));
                if ((randomNumber.NextDouble() + value2) < 1004.85)
                    double random = randomNumber.NextDouble();
                    value += random;
                    value1 += random;
                    value2 += random;
                    double random = randomNumber.NextDouble();
                    value -= random;
                    value1 -= random;
                    value2 -= random;
            return generatedData;
        private void timer_Tick(object sender, EventArgs e)


Real timeline Chart in WPF

Download the complete sample here.

See Also


How to bind a simple collection to Chart (SfChart) in WPF


Tips to improve the performance of Chart in WPF


What are the available types of Chart






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You must log in to leave a comment
Eduardo Arruda
Aug 30, 2020

How to call sfChart.SuspendSeriesNotification/sfChart.ResumeSeriesNotification on the viewModel?

Hemalatha Marikumar [Syncfusion]
Sep 09, 2020

You can invoke this suspend and resume notifications in view model using Action delegate as per in below code snippet.

In view model



public Action SuspendSeriesAction { get; set; }
public Action ResumeSeriesAction { get; set; }

private void LoadData()

//Load data


In the sample level:

public MainWindow()



 viewModel.SuspendSeriesAction = chart.SuspendSeriesNotification;   viewModel.ResumeSeriesAction =  chart.ResumeSeriesNotification;


For more reference, please refer below

Reference: https://docs.microsoft.com/en-us/dotnet/api/system.action?view=netcore-3.1

Eduardo Arruda
Dec 03, 2020

Hemalatha Marikumar,

this is not working. After "SuspendSeriesAction.Invoke()" sfChart is being updated when binded data changes.

Can you check it? Or provide a working sample.

Thank you.

Yuvaraj Palanisamy [Syncfusion]
Dec 09, 2020

Hi Eduardo Arruda,

As per your requirement we have prepared the sample with SuspendSeriesAction and ResumeSeriesAction. Please find the sample from the below link.

Sample: https://www.syncfusion.com/downloads/support/directtrac/general/ze/Wpf_Chart_Sample_Suspend_and_Resume_Action345359197

Regards, Yuvaraj

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