Update sfchart values

[Konstantinos Evangelidis]

Hello. I am trying to update the values of my graphs but nothing changing. I am setting the graph in this method and after that I am calling this method with different values. And I am recalling the method to update the values I am doing this.

new_vit_graph = view.FindViewById(Resource.Id.graph) as SfChart;

new_vit_graph = new SfChart(Activity);

new_vit_graph.RemoveAllViews();
vitGraphNew(x1, x2);

private void vitGraphNew(TimeSpan x1, TimeSpan x2)
        {
            Console.WriteLine("vitGraphNew");
            double q1 = x1.TotalMinutes;
            double q2 = x2.TotalMinutes;

            vitTime.Text = (x2.ToString(@"hh\:mm"));

            var r = (100 * q2) / q1;
            Console.WriteLine("rrr  " + r);

            new_vit_graph.SetBackgroundColor(Color.White);

            //Initializing primary axis
            CategoryAxis primaryAxis = new CategoryAxis();
            new_vit_graph.PrimaryAxis = primaryAxis;

            //Initializing secondary Axis
            NumericalAxis secondaryAxis = new NumericalAxis();
            secondaryAxis.Maximum = 100;
            new_vit_graph.SecondaryAxis = secondaryAxis;

            vitDdata = new ObservableCollection<Model>();
            vitDdata.Add(new Model("David", r));

            new_vit_graph.ColorModel.ColorPalette = ChartColorPalette.Custom;

            ChartGradientColor gradientColor = new ChartGradientColor() { StartPoint = new PointF(0.5f, 1), EndPoint = new PointF(0.5f, 0) };
            ChartGradientStop stop1 = new ChartGradientStop() { Color = Color.ParseColor("#c4ecff"), Offset = 0 };
            ChartGradientStop stop2 = new ChartGradientStop() { Color = Color.ParseColor("#086eb6"), Offset = 1 };
            gradientColor.GradientStops.Add(stop1);
            gradientColor.GradientStops.Add(stop2);

            ChartGradientColorCollection gradientColors = new ChartGradientColorCollection()
            {
                gradientColor
            };

            ChartGradientColor secondGradient = new ChartGradientColor() { StartPoint = new PointF(0.5f, 1), EndPoint = new PointF(0.5f, 0) };
            ChartGradientStop secondStop1 = new ChartGradientStop() { Color = Color.ParseColor("#1ac4ecff"), Offset = 0 };
            ChartGradientStop secondStop2 = new ChartGradientStop() { Color = Color.ParseColor("#1a086eb6"), Offset = 1 };
            secondGradient.GradientStops.Add(secondStop1);
            secondGradient.GradientStops.Add(secondStop2);

            ChartGradientColorCollection secondGradientColors = new ChartGradientColorCollection()
            {
                secondGradient
            };

            new_vit_graph.ColorModel.CustomGradientColors = gradientColors;

            //Initializing column series
            StackingColumn100Series vitSeries = new StackingColumn100Series();
            vitSeries.ItemsSource = vitDdata;
            vitSeries.Label = (x2.ToString(@"hh\:mm"));
            vitSeries.XBindingPath = "XValue";
            vitSeries.YBindingPath = "YValue";
            vitSeries.DataMarker.ShowLabel = false;
            //vitSeries.ColorModel.CustomGradientColors = gradientColors;
            vitSeries.TooltipEnabled = false;
            vitSeries.Width = 1;
            vitSeries.EnableAnimation = true;
            vitSeries.AnimationDuration = 1;

            new_vit_graph.SideBySideSeriesPlacement = false;
            new_vit_graph.PrimaryAxis.ShowMajorGridLines = false;
            new_vit_graph.SecondaryAxis.ShowMinorGridLines = false;
            new_vit_graph.SecondaryAxis.ShowMajorGridLines = false;
            new_vit_graph.PrimaryAxis.Visibility = Visibility.Gone;
            new_vit_graph.SecondaryAxis.Visibility = Visibility.Gone;
            new_vit_graph.Legend.Visibility = Visibility.Gone;
            new_vit_graph.Legend.IconVisibility = Visibility.Gone;

            new_vit_graph.Series.Add(vitSeries);

            vitDdata1 = new ObservableCollection<Model>();
            vitDdata1.Add(new Model("David", 100 - r));

            StackingColumn100Series vitSeries1 = new StackingColumn100Series();
            vitSeries1.ItemsSource = vitDdata1;
            vitSeries1.XBindingPath = "XValue";
            vitSeries1.YBindingPath = "YValue";
            vitSeries1.DataMarker.ShowLabel = false;
            vitSeries1.TooltipEnabled = false;
            vitSeries1.Width = 1;
            vitSeries1.ColorModel.ColorPalette = ChartColorPalette.Custom;
            vitSeries1.ColorModel.CustomGradientColors = secondGradientColors;
            vitSeries1.EnableAnimation = true;
            vitSeries1.AnimationDuration = 1;
           
            new_vit_graph.Series.Add(vitSeries1);

            Console.WriteLine("vitGraphNewFinish");
        }

[Divya Venkatesan]

Hi Konstantinos, 

  

Thanks for contacting Syncfusion support. 

  

We have prepared a sample based on your code snippets. On removing “new_vit_graph.RemoveAllViews();”, the chart updates properly. If your requirement is to clear the series and update new series, please use the below code snippet to clear the series. 

  

Code snippet[C#]: 

new_vit_graph.Series.Clear(); 

  

We have attached the sample for your reference which can be downloaded from the following link. 

 

Sample: http://www.syncfusion.com/downloads/support/forum/137983/ze/ChartSample1162882868  

  

Please let us know if you need any further assistance. 

  

Regards, 

Divya Venkatesan 

[Konstantinos Evangelidis]

Thank you very much for your answer. Working very nice.

[Divya Venkatesan]

Hi Konstantinos,

Thanks for the update. We are glad to know that the given solution works.

Please let us know if you need any further assistance.

Regards,
Divya Venkatesan