Question

我正在制作饼图＆amp;从数据表中获取值。这是我的代码：

.aspx代码

<asp:Chart ID="Chart1" runat="server" Width="500px">
                        <Series>
                            <asp:Series Name="Series1">
                            </asp:Series>
                        </Series>
                        <ChartAreas>
                            <asp:ChartArea Name="ChartArea1">
                            </asp:ChartArea>
                        </ChartAreas>
                    </asp:Chart>

.cs代码

Chart1.Series["Series1"].ChartType = SeriesChartType.Pie; 
Chart1.Series["Series1"]["DrawingStyle"] = "Emboss";
Chart1.ChartAreas["ChartArea1"].Area3DStyle.Enable3D = true;
Chart1.Series["Series1"].IsValueShownAsLabel = true; 

DataTable dt = new DataTable();
        DataColumn dc;

        con.ConnectionString = ConfigurationManager.ConnectionStrings["mySQLConnection"].ToString();
    con.Open();

        SqlCommand cmd = new SqlCommand("Select Name, COUNT(code) AS quantity from vTable GROUP BY Name", con1);
        var dr = cmd.ExecuteReader();
        dt.Load(dr);

        Chart1.DataSource = dt;
        Chart1.Series["Series1"].XValueMember = "Name";
        Chart1.Series["Series1"].YValueMembers = "quantity";
        Chart1.DataBind();

我想在饼图上显示两个标签及其值。 SQL查询中的Name列应显示为label＆amp;数量作为价值。怎么可能？

Answer 1

我相信您正在寻找DataPointCollection.DataBindXY(IEnumerable, IEnumerable[])，MSDN。

示例：

        string[] Names = new string[] { "Item1", "Item2", "Item3" };
        double[] Values = new double[] { 0.1, 0.2, 0.3 };
        chart1.Series[0].Points.DataBindXY(Names, Values);

希望能让你朝着正确的方向前进！

ASP饼图添加带有值的标签

1 个答案: