Chart控件使用初步

学习了Chart控件的初步使用方法，生成柱形图和饼图。

   <asp:Chart ID="Chart1" runat="server" Width="553px" Height="403px">
            <Series>
                <asp:Series LegendText="得票数" Name="Series1" IsValueShownAsLabel="True" XValueMember="选择项"
                    YValueMembers="数量" Legend="Legend1" Color="Red" Font="Microsoft Sans Serif, 12pt"
                    LabelForeColor="Green">
                </asp:Series>
                <asp:Series ChartArea="ChartArea2" ChartType="Pie" Legend="Legend2" 
                    Name="Series2" IsValueShownAsLabel="True" XValueMember="选择项"
                    YValueMembers="数量" XValueType="String">
                </asp:Series>
            </Series>
            <ChartAreas>
                <asp:ChartArea Name="ChartArea1">
                    <AxisY Title="得票数">
                        <LabelStyle ForeColor="Blue" />
                    </AxisY>
                    <AxisX Title="课程">
                        <MajorGrid LineColor="Yellow" />
                        <%--线条颜色--%>
                    </AxisX>
                </asp:ChartArea>
                <asp:ChartArea Name="ChartArea2">
                    <AxisY Title="得票数">
                        <LabelStyle ForeColor="Blue" />
                    </AxisY>
                    <AxisX Title="课程">
                        <MajorGrid LineColor="Yellow" />
                        <%--线条颜色--%>
                    </AxisX>
                </asp:ChartArea>
            </ChartAreas>
            <Legends>
                <asp:Legend Name="Legend1">
                </asp:Legend>
                <asp:Legend Name="Legend2">
                <Position X="80" Y="50" Height="20" Width="30" />
                </asp:Legend>
            </Legends>
            <Titles>
                <asp:Title Name="Title1" Text="投票结果">
                </asp:Title>
            </Titles>
        </asp:Chart>
后台代码：

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
 
                Chart1.DataSource = GetTable();
                //#XVAL表示数据点的X值，#YVAL表示数据点的Y值
                Chart1.Series[1].Label = "课程:#VALX，得票数：#VALY";
                //显示在饼图外面
                Chart1.Series[1].CustomProperties = "PieLabelStyle=Outside";
                Chart1.Series[1].LabelToolTip = "#VALX: #VALY";
                //自定义图例
                Chart1.Series[1].LegendText = "#VALX";
                
            }
        }
        public DataTable GetTable()
        {
            string collectionstring = @"Data Source=.sqlexpress;Initial Catalog=OnlineVoteDB;User ID=sa;Pwd=xx;Persist Security Info=True;"; 
            SqlConnection conn = new SqlConnection(collectionstring);
            SqlDataAdapter sad = new SqlDataAdapter("select name as 选择项,votecount as 数量 from [Items] where [SubjectID]=13 ", conn);
            DataSet ds = new DataSet();
            sad.Fill(ds, "table"); conn.Close();
            return ds.Tables[0];
        }
    }
效果：