主要代码如下：
for (int i = 0; i < dt.Rows.Count; i++)
{
Series series = new Series("线条" + (i + 1).ToString());
series.ChartType = SeriesChartType.Spline;
series.BorderWidth = 2;// 线宽2个像素
chart1.Series.Add(series);
}
chart1.ChartAreas[0].AxisX.Interval = 6;//设置横坐标间距
for (int i = 0; i < dt.Rows.Count; i++)
{
for (int j = 2; j < dt.Columns.Count; j++)
if (dt.Rows[i][j].ToString() != "")
{
chart1.Series["线条" + (i + 1).ToString()].Points.AddXY(dt.Columns[j].ColumnName, dt.Rows[i][j].ToString());
//chart1.Series["线条" + (i + 1).ToString()].IsValueShownAsLabel = true;
}
}