如何在c＃中创建多折线图

Question

我想创建一个c＃图形（多行），我已经将它与sql server数据库连接起来以填充该系列，并且它适用于一行，而另一行却不起作用第一行未显示在图表中，但第二行显示，我不得不将枚举为0和1的序列“仅（意甲1）工作）如果可以提供帮助，请有人检查代码

// dashboard
        ArrayList joursvisites = new ArrayList();
        ArrayList nombrevisites = new ArrayList();
        ArrayList nombreventes = new ArrayList();
        ArrayList chffreAffaire = new ArrayList();

        #region dashboard
        private void ventes_visites()
            {
                 string connstr = ConfigurationManager.ConnectionStrings["connstrng"].ConnectionString;

                 using(SqlConnection con = new SqlConnection(connstr))
                 {

                      string query = "SELECT cast(d.Jours AS INT) as jours, count(d.ID_Visiteur) as nombre_visite, " +
                      "cast(count(dl.ProduitChoisit) AS INT) as nombre_ventes, " +
                      "cast(sum(dl.PrixPayé) AS INT) as chiffre_affaire " +
                      "FROM dbo.Deal as dl JOIN dbo.DateVisite as d " +
                      "ON dl.ID_Date = d.ID_Date " +
                      "GROUP BY d.Jours " +
                      "ORDER By Jours ASC";

                       SqlCommand cmd = new SqlCommand(query, con);

                       con.Open();
                       SqlDataReader reader = cmd.ExecuteReader();

                       while (reader.Read())
                       {
                           joursvisites.Add(reader.GetInt32(0));
                           nombrevisites.Add(reader.GetInt32(1));
                           nombreventes.Add(reader.GetInt32(2));
                           chffreAffaire.Add(reader.GetInt32(3));
                       }

                      chart1.Series[0].Points.DataBindXY(joursvisites, nombrevisites);
                      chart1.Series[1].Points.DataBindXY(joursvisites, nombreventes);
                      chart2.Series[0].Points.DataBindXY(joursvisites, chffreAffaire);

                      reader.Close();
                      con.Close();   
                 }
            }
        #endregion

Answer 1

public void LoadMultiLineChart（）{

string query = "SELECT ShipCountry, DATEPART(Year, OrderDate) [Year], 

COUNT（OrderId）[总计]“;

query += " FROM Orders WHERE ShipCountry IN ('France', 'Germany', 'Brazil')";

query += " GROUP BY ShipCountry, DATEPART(Year, OrderDate)";

DataTable dt = GetData(query);

List<string> countries = (from p in dt.AsEnumerable()
                  select p.Field<string("ShipCountry")).Distinct().ToList();

if (Chart1.Series.Count() == 1)
{
    Chart1.Series.Remove(Chart1.Series[0]);
}

foreach (string country in countries)
{

    int[] x = (from p in dt.AsEnumerable()
               where p.Field<string>("ShipCountry") == country
               orderby p.Field<int>("Year") ascending
               select p.Field<int>("Year")).ToArray();

    int[] y = (from p in dt.AsEnumerable()
               where p.Field<string>("ShipCountry") == country
               orderby p.Field<int>("Year") ascending
               select p.Field<int>("Total")).ToArray();

    Chart1.Series.Add(new Series(country));
    Chart1.Series[country].IsValueShownAsLabel = true;
    Chart1.Series[country].BorderWidth = 3;
    Chart1.Series[country].ChartType = SeriesChartType.Line;
    Chart1.Series[country].Points.DataBindXY(x, y);
}

Chart1.Legends[0].Enabled = true;

}

私有静态数据表GetData（字符串查询）{字符串constr = @“数据源=。\ SQL2005;初始目录= Northwind;用户ID = sa;密码= pass @ 123”;

using (SqlConnection con = new SqlConnection(constr))
{
    using (SqlDataAdapter sda = new SqlDataAdapter(query, con))
    {
        DataTable dt = new DataTable();

        sda.Fill(dt);

        return dt;
    }
}

}