【Vegas原创】ComponentArt经典使用（饼图）

void chartbind(string strDept)
        {
            DataSet ds = new DataSet();
            for (int i = 1; i <= 3; i++)
            {
                //连接数据库,并插入数据
                SqlParameter[] sqlParam = new SqlParameter[4];

                sqlParam[0] = new SqlParameter("@i", SqlDbType.Int, 20, ParameterDirection.Input, false, 0, 0, "@i", DataRowVersion.Default, i);
                sqlParam[1] = new SqlParameter("@j", SqlDbType.NVarChar, 20, ParameterDirection.Input, false, 0, 0, "@j", DataRowVersion.Default, strDept);
                sqlParam[2] = new SqlParameter("@year", SqlDbType.NVarChar, 20, ParameterDirection.Input, false, 0, 0, "@year", DataRowVersion.Default, drpYear.SelectedValue.Trim());
                sqlParam[3] = new SqlParameter("@pa", SqlDbType.NVarChar, 20, ParameterDirection.Input, false, 0, 0, "@pa", DataRowVersion.Default, drpPa.SelectedValue.Trim());
    
                try
                {
                    if (i == 1)
                    {
                        DataSet ds1 = db.GetDataSet("pms_potential_chart", sqlParam);
                        ds.Merge(ds1);
                    }
                    else if (i == 2)
                    {
                        DataSet ds2 = db.GetDataSet("pms_potential_chart", sqlParam);
                        ds.Merge(ds2);
                    }
                    else if (i == 3)
                    {
                        DataSet ds3 = db.GetDataSet("pms_potential_chart", sqlParam);
                        ds.Merge(ds3);
                    }
                }
                catch
                {
                    return;
                }
            }
            double[] y = new double[10];
            string[] x = new string[10];

            for(int i=0;i<ds.Tables[0].Rows.Count;i++)
            {
                x[i]=ds.Tables[0].Rows[i][0].ToString();
                y[i]=double.Parse(ds.Tables[0].Rows[i][1].ToString());
            }
            targetChart.DataSource = ds.Tables[0].DefaultView;
            targetChart.Series["S0"].Parameters["x"] = x;
            targetChart.Series["S0"].Parameters["y"] = y;
            targetChart.DataBind();
            targetChart.Draw();

        }