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Michael
225
How to bind chart to DataTable or SQLDataSource
posted

Hi,

I have an UltraChart control. It looks like this:

<igchart:UltraChart ID="UltraChart1" runat="server" EmptyChartText="Data Not Available" Version="10.2">
</igchart:UltraChart>

In the code behind I have this:

protected void Page_Load(object sender, EventArgs e)
        {
            DataTable dt = new DataTable();
            dt.Columns.Add("label", typeof(string));
            dt.Columns.Add("cost", typeof(double));
            dt.Rows.Add("item 1", 29);
            dt.Rows.Add("item 2", 33);
            dt.Rows.Add("item 3", 28);
            dt.Rows.Add("item 4", 35);

            NumericSeries series = new NumericSeries();
            series.Data.DataSource = dt;
            series.Data.LabelColumn = "label";
            series.Data.ValueColumn = "cost";
            series.DataBind();
            UltraChart1.Series.Add(series);
            UltraChart1.Data.DataBind();
        }

The result is a chart with some values. Great!

---------

So what I have done is create a new Composite Chart using the wizard. I called it UltraChart2. I added all the Areas, Axis, Data, Chart Layers and Legends. I got the chart looking exacly the way I like it. I'm not going to put the code here unless you ask for it because it is like 250 lines long.

Now all I want to do is replace the current data that I added when I went through the wizard to some custom data. So once again, I put this in the code behind:

protected void Page_Load(object sender, EventArgs e)
        {
            DataTable dt = new DataTable();
            dt.Columns.Add("label", typeof(string));
            dt.Columns.Add("cost", typeof(double));
            dt.Rows.Add("item 1", 29);
            dt.Rows.Add("item 2", 33);
            dt.Rows.Add("item 3", 28);
            dt.Rows.Add("item 4", 35);

            NumericSeries series = new NumericSeries();
            series.Data.DataSource = dt;
            series.Data.LabelColumn = "label";
            series.Data.ValueColumn = "cost";
            series.DataBind();
            UltraChart2.Series.Add(series);
            UltraChart2.Data.DataBind();
        }

The result is the chart with exacly the same data that I added in the wizard. If I delete this data, I get a blank chart.

This should be a simple process but I'm obviously missing something vital. Can you fill me in?

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