关于c# chart曲线图。。求高手

Question

            
            ChartData data = c1Chart1.ChartGroups[0].ChartData;
            ChartDataSeriesCollection series = data.SeriesList;
            ChartDataSeries Series1 = series.AddNewSeries();
            ChartDataSeries Series2 = series.AddNewSeries();
            PointF[] data1 = new PointF[dtclcr.Rows.Count];            PointF[] data2 =new PointF[dtclcr.Rows.Count];            for (int i = 0; i < dtclcr.Rows.Count; i++)
            {                float x = float.Parse(dtclcr.Rows[i]["TAPN0"].ToString());
                float y = float.Parse(dtclcr.Rows[i]["REALR2"].ToString());
                float z = float.Parse(dtclcr.Rows[i]["CLCR2"].ToString()); 
                
                data1[i] = new PointF(x, y);
                Series1.PointData.Length = dtclcr.Rows.Count;
                Series1.X[i] = data1[i].X;
                Series1.Y[i] = data1[i].Y;                data2[i] = new PointF(x, z);
                Series2.PointData.Length = dtclcr.Rows.Count;
                Series2.X[i] = data2[i].X;
                Series2.Y[i] = data2[i].Y;
            }    代码如上，为什么在chart图中只显示一条曲线，应该是两条

Answer 1

Series series1 = new Series();
Series series2 = new Series();
for (int i = 0; i < dtclcr.Rows.Count; i++)
{
    ......
    series1.Points.AddXY(x,y);
    series2.Points.AddXY(x,z);
}
this.c1Chart1.Series[0] = series1;
this.c1Chart1.Series[1] = series2;

Answer 2

在chart控件的属性->Series点开后，打开了Series集合编辑器， 成员列表添加 Series1，Series2

Answer 3

 //每天day
        public static DataTable getDaysTrafficByUsername(string userName, string type, DateTime startDate, DateTime endDate)
        {            string sql = @"SELECT round(sum(size/1000/1024),2)daysTrafficSum,DATE_FORMAT(date, '%Y-%m-%d') days from owa_isa     ";
            sql += " where username=@userName and client=@type and action='A'and date between @startDate and @endDate GROUP BY days ";
            DbStatement stmt = dbc.DbSessionOwa.GetStatement(sql);//换成你写的 
            stmt.Parameters.Add("@userName", userName);
            stmt.Parameters.Add("@type", type);
            stmt.Parameters.Add("@startDate", startDate);
            stmt.Parameters.Add("@endDate", endDate);
            return dbc.DbSessionOwa.ExecuteDataTable(stmt);//换成你写的查询方法 公司的框架
          
        }  //前一个月 31天
        public virtual DataTable getDaysTrafficByUsername(string name, string type, DateTime startDate, DateTime endDate)
        {
            return OwaEntity.getDaysTrafficByUsername(name, type, startDate, endDate);
        }  //每天
        private void getDaysTrafficByUsername(string userName, string type, DateTime startDate, DateTime endDate)
        {
            DataTable dt = new DataTable();
            dt.Columns.Add("days");
            dt.Columns.Add("daysTrafficSum");
            
            dt = owam.getDaysTrafficByUsername(userName, type, startDate, endDate);  //调用业务层的方法
            
            //设置图表的数据源
            dayChart.DataSource = dt;            //设置图表Y轴对应项
            dayChart.Series[0].XValueMember = "days";
            dayChart.Series[0].YValueMembers = "daysTrafficSum";
           dayChart.Series[0].Name = userName+" 前30天 O"+type+"A 下载附件趋势图";
            dayChart.ChartAreas["ChartArea1"].AxisX.MajorGrid.Interval = 1;
            dayChart.ChartAreas["ChartArea1"].AxisX.LabelStyle.Interval = 1;
          
            if (dt.Rows.Count == 0)             //没数据不显示
            dayChart.Visible = false;
                    }
代码就这样mysql数据库 用的是公司的框架不过程序思路都一样 换2个地方就好了 希望帮到你

Answer 4

你好，我想用纯代码实现，现在问题是不能在chartgroup[0下只显示series1，如果代码中series1和series2添加顺序颠倒下，chartgroup[0]只显示series2；但是如果换chartgroup[1]时就能全部显示这是为什么呢？]
在chart控件的属性->Series点开后，打开了Series集合编辑器， 成员列表添加 Series1，Series2

Answer 5

你好，我想用纯代码实现，现在问题是不能在chartgroup[0]下只显示series1，如果代码中series1和series2添加顺序颠倒下，chartgroup[0]只显示series2；但是如果换chartgroup[1]时就能全部显示这是为什么呢？

Answer 6

我用的没有ChartGroups这个属性，爱莫能助了啊

Answer 7

http://blog.csdn.net/xianfajushi/article/details/7493697