URGENT!! pls help, Chartview become smaller and smaller (zoomed out) when binding the new data

[Richard]

it is super weird. I spend over 4 hours 

my project has very simple data table :

date,quantitysold,AverageQuantity,  in datatime, int, int

date will be X

quantitysold, averageQuantity, will be Y1 and Y2

first, user will get the product ID table into gridview and when choosing the product to show the chart,

the radchartview should popup/update the chart based on the product PID

I could make it work when I click the first product ID, erverything is ok, but more I click the datagrid to view the product sales data , the chartview becomes more smaller, please refer to the screenshots

everytime I click the data, I first make series.clear(), and tested area clear(), chart refresh, update.

 

 

   private void radGridView_197_data_CellClick(object sender, Telerik.WinControls.UI.GridViewCellEventArgs e)
        {
            this.radChartView_197_chart.Series.Clear();
            this.radChartView_197_chart.Area.Series.Clear();
            this.radChartView_197_chart.Refresh();
            this.SetChartViewData();
         //   if (gridview_197_firstClick)
            this.SetupChartView();

....more other code here ,

....

 

               CartesianArea area = this.radChartView_197_chart.GetArea<CartesianArea>();
                area.ShowGrid = true;
                CartesianGrid grid = area.GetGrid<CartesianGrid>();
                grid.DrawHorizontalStripes = true;

 

 

...............more code here to update the table which is every time different because product id changed.

 this.radChartView_197_chart.DataSource = table;
         
            this.radChartView_197_chart.Update();
            this.radChartView_197_chart.Refresh();

 

 

 

}
          

there is no zoom related setup , I tried almost everything, but there is very limited source online to bind the new data source.

 

please let me know how to do this.

 

 

 

 

 

 

 

[Richard]

update:

 

just find the very strange problem

in my test code,

if I comm out

//   speed.VerticalAxis = speedAxis;
         //  speed.HorizontalAxis = horizontalAxis;

then it works without any problem (but without multiple verticalaxis, chart is useless since use all shared Y and X )

left any verticalaxis or horzontalaxis will cause the chart zoomed out at that direction.

 

 

 

 

LineSeries speed = new LineSeries();
         //   speed.LegendTitle = "Qty";
            speed.ValueMember = "Qty";
            speed.CategoryMember = "Time";
            LinearAxis speedAxis = new LinearAxis();
            speedAxis.AxisType = AxisType.First;
            speedAxis.Title = "Quantity";
           // speedAxis.Minimum = 0;
            //speedAxis.Maximum = 500;
         //   speed.VerticalAxis = speedAxis;
           speed.HorizontalAxis = horizontalAxis;
            this.radChartView_197_chart.Series.Add(gear);

[Dimitar]

Hello Richard,

Thank you for writing.

In this case, you should remove the axes after the series are cleared: 

radChartView1.Series.Clear();
radChartView1.Axes.Purge();

LineSeries speed = new LineSeries();
//   speed.LegendTitle = "Qty";
speed.ValueMember = "Qty";
speed.CategoryMember = "Time";
speed.DataSource = GetTable();

LinearAxis speedAxis = new LinearAxis();
speedAxis.AxisType = AxisType.Second;
speedAxis.Title = "Quantity";
speedAxis.Minimum = 0;
speedAxis.Maximum = 500;

speed.VerticalAxis = speedAxis;
this.radChartView1.Series.Add(speed);

Let me know if you have additional questions.

Regards,
Dimitar
Telerik

[Richard]

solved

 

axes purge()

 

thanks