It's a DataTable of your own.
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DataTable dataTable1 = new System.Data.DataTable ();
DATATABLE1.COLUMNS.ADD ("Net", typeof (String));
DATATABLE1.COLUMNS.ADD ("Date", typeof (DateTime));
DATATABLE1.COLUMNS.ADD ("Day Development", typeof (Double));
DataTable dataTable2 = Datatable1.clone ();
DataTable dataTable3 = Datatable1.clone ();
DATATABLE1.ROWS.ADD ("Net 1", New DateTime (2014, 1, 1), 12.0);
DATATABLE1.ROWS.ADD ("Net One", New DateTime (2014, 2, 1), 14.0);
DATATABLE2.ROWS.ADD ("Net 2", New DateTime (2014, 1, 1), 5.0);
DATATABLE2.ROWS.ADD ("Net 2", New DateTime (2014, 2, 1), 10.0);
DATATABLE3.ROWS.ADD ("NET 3", New DateTime (2014, 1, 1), 7.0);
DATATABLE3.ROWS.ADD ("Net", New DateTime (2014, 2, 1), 18.0);
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Chart1. Series.clear ();//Clears data from the table
Data in the first table
Series Datatable1series = new series ("DataTable1");
DataTable1Series.Points.DataBind (Datatable1.asenumerable (), "date", "Day development", "" ");
Datatable1series.xvaluetype = Chartvaluetype.datetime; Set X axis type to TIME
Datatable1series.charttype = Seriescharttype.line; Set the y-axis to be a polyline
Chart1. Series.add (datatable1series);
Data in the second table
Series Datatable2series = new series ("DataTable2");
DataTable2Series.Points.DataBind (Datatable2.asenumerable (), "date", "Day development", "" ");
Datatable2series.xvaluetype = chartvaluetype.datetime;//Set X-axis type to TIME
Datatable2series.charttype = Seriescharttype.line; Set the y-axis to be a polyline
Chart1. Series.add (datatable2series);
Data in the third table
Series Datatable3series = new series ("DataTable3");
DataTable3Series.Points.DataBind (Datatable3.asenumerable (), "date", "Day development", "" ");
Datatable3series.xvaluetype = chartvaluetype.datetime;//Set X-axis type to TIME
Datatable3series.charttype = Seriescharttype.line; Set the y-axis to be a polyline
Chart1. Series.add (datatable3series);
DataTable +chart Control