Multi Series MSChart

本文关键字：MSChart Series Multi | 更新日期: 2023-09-27 18:08:01

我是MSChart的新手，下面的代码适用于多系列列。但我知道应该有一种更短的方式来展示多系列用很少的代码创建两个数据表或更好的方法使用DataBindTable或DataBindCrossTable。

是否有更短的方法来做我下面正在做的事情?顺便说一下，我想做的是显示在给定学年有多少学生注册。

String sql, sql2;
sql = @"SELECT Major, SchoolYear,  COUNT(*) as TotalStudents 
                FROM StudentList 
                WHERE Major='AFT' 
                GROUP BY Major, Schoolyear";
sql2 = @"SELECT Major, SchoolYear,  COUNT(*) as TotalStudents 
                FROM StudentList 
                WHERE Major='AFT' 
                GROUP BY Major, Schoolyear";
        SqlConnection con = new SqlConnection(connString);
        con.Open();
        SqlDataAdapter dta = new SqlDataAdapter(sql, con);
        DataSet dst = new DataSet();
        DataTable dt;
        dta.Fill(dst);
        dt = dst.Tables[0];
        chart1.Width = 900;
        chart1.ChartAreas[0].AxisX.Title = "School Year";
        chart1.ChartAreas[0].AxisY.Title = "Enrollment";
        chart1.Series[0].Name = dt.Rows[0][0].ToString();
        chart1.Series[0].XValueMember = "SchoolYear";
        chart1.Series[0].YValueMembers = "TotalStudents";
        chart1.Series[0].Points.DataBindXY(dt.CreateDataReader(),"SchoolYear", dt.CreateDataReader(), "TotalStudents");

        dta = new SqlDataAdapter(sql2, con);
        dst = new DataSet();
        dta.Fill(dst);
        dt = dst.Tables[0];
        chart1.Series.Add(dt.Rows[0][0].ToString());
        chart1.Series[1].XValueMember = "SchoolYear";
        chart1.Series[1].YValueMembers = "TotalStudents";
        chart1.Series[1].Points.DataBindXY(dt.CreateDataReader(), "SchoolYear", dt.CreateDataReader(), "TotalStudents");

Multi Series MSChart

你愿意试试下面这个吗?

String sql, sql2;
sql = @"SELECT Major, SchoolYear,  COUNT(*) as TotalStudents 
                FROM StudentList 
                WHERE Major='AFT' 
                GROUP BY Major, Schoolyear";

        SqlConnection con = new SqlConnection(connString);
        con.Open();
        SqlDataAdapter dta = new SqlDataAdapter(sql, con);
        DataSet dst = new DataSet();
        DataTable dt;
        dta.Fill(dst);
        dt = dst.Tables[0];
        chart1.DataSource = dt;
        chart1.Width = 900;
        chart1.ChartAreas["abc"].AxisX.Title = "School Year";
        chart1.ChartAreas["abc"].AxisY.Title = "Enrollment";
        chart1.Series["xyz"].Name = dt.Rows[0][0].ToString();
        chart1.Series["xyz"].XValueMember = "SchoolYear";
        chart1.Series["xyz"].YValueMembers = "TotalStudents";

        chart1.DataBind();
HTML: 

            <asp:Chart ID="chart1" runat="server" ImageStorageMode="UseImageLocation" ImageLocation="ChartPic_#SEQ(300,3)">
                <ChartAreas>
                    <asp:ChartArea Name="abc">
                    </asp:ChartArea>
                </ChartAreas>
            </asp:Chart>
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