chart1.ChartAreas[0].AxisX.MajorGrid.LineDashStyle = ChartDashStyle.Dash; //设置网格类型为虚线
chart1.ChartAreas[0].AxisY.MajorGrid.LineDashStyle = ChartDashStyle.Dash; //设置网格类型为虚线
chart1.ChartAreas[0].AxisX.MajorGrid.LineDashStyle = ChartDashStyle.Dash; //设置网格类型为虚线
chart1.ChartAreas[0].AxisY.MajorGrid.LineDashStyle = ChartDashStyle.Dash; //设置网格类型为虚线