DataTable +chart控件

//这是仿你的DataTable



//-----开始---------

DataTable dataTable1 = new System.Data.DataTable();

dataTable1.Columns.Add("网别", typeof(string));

dataTable1.Columns.Add("日期", typeof(DateTime));

dataTable1.Columns.Add("日发展", typeof(double));

DataTable dataTable2 = dataTable1.Clone();

DataTable dataTable3 = dataTable1.Clone();

dataTable1.Rows.Add("网别1", new DateTime(2014, 1, 1), 12.0);

dataTable1.Rows.Add("网别11", new DateTime(2014, 2, 1), 14.0);

dataTable2.Rows.Add("网别2", new DateTime(2014, 1, 1), 5.0);

dataTable2.Rows.Add("网别2", new DateTime(2014, 2, 1), 10.0);

dataTable3.Rows.Add("网别3", new DateTime(2014, 1, 1), 7.0);

dataTable3.Rows.Add("网别31", new DateTime(2014, 2, 1), 18.0);

//---------结束-------------

chart1.Series.Clear();//清空表中的数据

//第一个表中的数据

Series dataTable1Series = new Series("dataTable1");

dataTable1Series.Points.DataBind(dataTable1.AsEnumerable(), "日期", "日发展", "");

dataTable1Series.XValueType = ChartValueType.DateTime; //设置X轴类型为时间

dataTable1Series.ChartType = SeriesChartType.Line; //设置Y轴为折线

chart1.Series.Add(dataTable1Series);

//第二个表中的数据

Series dataTable2Series = new Series("dataTable2");

dataTable2Series.Points.DataBind(dataTable2.AsEnumerable(), "日期", "日发展", "");

dataTable2Series.XValueType = ChartValueType.DateTime;//设置X轴类型为时间

dataTable2Series.ChartType = SeriesChartType.Line; //设置Y轴为折线

chart1.Series.Add(dataTable2Series);

//第三个表中的数据

Series dataTable3Series = new Series("dataTable3");

dataTable3Series.Points.DataBind(dataTable3.AsEnumerable(), "日期", "日发展", "");

dataTable3Series.XValueType = ChartValueType.DateTime;//设置X轴类型为时间

dataTable3Series.ChartType = SeriesChartType.Line; //设置Y轴为折线

chart1.Series.Add(dataTable3Series);