Chart控件使用初步

<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：