BarCharts / Label, ToolTip Error / Code Behind

  1. #1

    [Solved] BarCharts / Label, ToolTip Error, Legendconfig / Code Behind

    Hello,

    I was trying to make the barchart example working building it completely from code behind. But I am running in some troubles about the Label/ToolTip/LegendConfig tags: As soon as I uncomment one of them I get a "Object reference not set to an instance of an object.".

    Can anyone give me a clue why that is? How to I have to create those from code behind to avoid this error?

    Thank you very much,

    best regards!

    <%@ Page Language="C#" %>
    
    <script runat="server">
        protected void Page_Load(object sender, EventArgs e)
        {
            List<object> objList = new List<object>
            {
                new { Month = "Jan", Data1 = 20, Data2 = 37, Data3 = 35, Data4 = 4 },
                new { Month = "Feb", Data1 = 20, Data2 = 37, Data3 = 36, Data4 = 5 },
                new { Month = "Mar", Data1 = 19, Data2 = 36, Data3 = 37, Data4 = 4 },
                new { Month = "Apr", Data1 = 18, Data2 = 36, Data3 = 38, Data4 = 5 },
                new { Month = "May", Data1 = 18, Data2 = 35, Data3 = 39, Data4 = 4 },
                new { Month = "Jun", Data1 = 17, Data2 = 34, Data3 = 42, Data4 = 4 },
                new { Month = "Jul", Data1 = 16, Data2 = 34, Data3 = 43, Data4 = 4 },
                new { Month = "Aug", Data1 = 16, Data2 = 33, Data3 = 44, Data4 = 4 },
                new { Month = "Sep", Data1 = 16, Data2 = 32, Data3 = 44, Data4 = 4 },
                new { Month = "Oct", Data1 = 16, Data2 = 32, Data3 = 45, Data4 = 4 },
                new { Month = "Nov", Data1 = 15, Data2 = 31, Data3 = 46, Data4 = 4 },
                new { Month = "Dec", Data1 = 15, Data2 = 31, Data3 = 47, Data4 = 4 }
            };
    
            Ext.Net.Panel pnl = new Ext.Net.Panel
            {
                Width = 650,
                Layout = "AnchorLayout",
                DefaultAnchor = "100%",
                Items =
                {
                     new CartesianChart
                    {
                        ID = "Chart",
                        Height = 460,
                        InsetPaddingSpec = "10 40 40 40",
                        Store =
                        {
                            new Store
                            {
                                Model =
                                {
                                    new Model
                                    {
                                        Fields =
                                        {
                                            new ModelField { Name = "Month", Type = ModelFieldType.Auto },
                                            new ModelField { Name = "Data1", Type = ModelFieldType.Auto },
                                            new ModelField { Name = "Data2", Type = ModelFieldType.Auto },
                                            new ModelField { Name = "Data3", Type = ModelFieldType.Auto },
                                            new ModelField { Name = "Data4", Type = ModelFieldType.Auto }
                                        }
                                    }
                                },
                                DataSource = objList
                            }
                        },
                        // LegendConfig = { Dock = Dock.Top },
                        Axes =
                        {
                            new NumericAxis
                            {
                                Position = Position.Left,
                                Fields = new string[] { "Data1" },
                                Grid = true,
                                Minimum = 0,
                                Renderer = { Handler = "return label.toFixed(label < 10 ? 1: 0) + '%';" }
                            },
                            new CategoryAxis
                            {
                                Position = Position.Bottom,
                                Fields = new string[] { "Month" },
                                //Label = { RotationDegrees = -45 }
                            }
                        },
                        Series =
                        {
                            new BarSeries
                            {
                                XField = "Month",
                                YField = new string[] { "Data1", "Data2", "Data3", "Data4" },
                                Stacked = false,
                                Titles = new string[] { "IE", "FF", "Chrome", "Safari" },
                                StyleSpec = { new Sprite { Opacity = 0.8 } },
                                HighlightConfig = { new Sprite { FillStyle = "yellow" } },
                                //Tooltip = { TrackMouse = true, Renderer = { Handler="var browser = context.series.getTitle()[Ext.Array.indexOf(context.series.getYField(), context.field)]; toolTip.setHtml(browser + ' for ' + record.get('Month') + ': ' + record.get(context.field) + '%');" } }
                            }
                        }
                    }
                }
            };
    
            this.PlaceHolderPanel.Controls.Add(pnl);
    
        }
    </script>
    
    <!DOCTYPE html>
    
    <html>
    <head runat="server">
        <title>Column Chart - Ext.NET Examples</title>
        <link href="/resources/css/examples.css" rel="stylesheet" />
    
    </head>
    <body>
        <form runat="server">
            <ext:ResourceManager runat="server" />
    
            <asp:PlaceHolder runat="server" ID="PlaceHolderPanel"></asp:PlaceHolder>
    
        </form>
    </body>
    </html>
    Last edited by tMp; Apr 30, 2019 at 6:03 PM.
  2. #2
    found the answer:
    LegendConfig = new ChartLegend { ... }
    ToolTip = new { ... }
    etc.

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