Object reference not set to an instance of an object. when create dynamic Barchart in code-bind

[dinhhung09138]

Hi guys..
I created barchart dinamic. But it's not work.. And when i create dynamic linechart. it's same error.
Please tell me what is this problem.

Thanks.

Here is my code

public Chart fn_Generate_BarChart(string ID, DataTable dtData)
    {
        Chart barChart = new Chart() { ID = "bar" + ID, Animate = true, Shadow = true, Theme = "CustomBlue" };
        Store st = new Store() { ID = "stbar" + ID, AutoDataBind = true };
        Model md = new Model() { ID = "mdbar" + ID };
        ModelField m1 = new ModelField() { Name = "NAME" };
        ModelField m2 = new ModelField() { Name = "DATA"};
        md.Fields.Add(m1); md.Fields.Add(m2);
        st.Model.Add(md);
        st.DataSource = dtData;
        barChart.Store.Add(st);
        //Error here
        barChart.Axes.Add(new NumericAxis()
        {
            Fields = new string[] { "DATA" },
            Position = Position.Bottom,
            Grid = true,
            Label = { Renderer = { Handler = "return Ext.util.Format.number(value, '0,0');" } }
        });
        barChart.Series.Add(new BarSeries()
        {
            Axis = Position.Bottom,
            Highlight = true,
            XField = new string[] { "NAME" },
            YField = new string[] { "DATA" },
            Tips =
            {
                TrackMouse = true,
                Renderer = { Handler = "this.setTitle(storeItem.get('NAME') + ': ' + storeItem.get('DATA'));" }
            },
            Label =
            {
                Display = SeriesLabelDisplay.InsideEnd,
                Field = new string[] { "DATA" },
                Orientation = Orientation.Horizontal,
                Color = "#333",
                TextAnchor = "middle"
            }
        });
        return barChart;
    }

[dinhhung09138]

Column chart is also too.

[Daniil]

Hi @dinhhung09138,

Please provide us with a standalone example which we can copy, paste and run without any changes from our side.