Datatable的按列排序排序

Datatable不可以排序，要想排序只能是给它的视图DataView进行排序，这在制作Chart时很重要，因为对于时序图而言，必须首先按照时间进行排序。

        private void toolStripMenuItem1_Click(object sender, EventArgs e)
        {
            DataTable dt = this.dataGridView1.DataSource as DataTable;
            dt.DefaultView.Sort = "年份";
            DataView dv= new DataView(dt);//数据视图，Datatable无法排序
            dv.Sort = "年份";
            
            ChartForm frm = new ChartForm();
            frm.chart1.DataSource = dv;
            frm.chart1.Series[0].XValueMember = "年份";
            frm.chart1.Series[0].YValueMembers = strColumnName;
            MessageBox.Show(strColumnName);
            frm.chart1.Series[0].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.FastLine;
            frm.Show();
        }