雷达图（只有一个产品时）：
将Series1的Color=“Transparent”，设置为透明，Or是整个区域的颜色。是一个产品的趋势时候还无所谓，如果是两个产品的前面的就会覆盖后面的趋势图。
HTML
1 <asp:Chart ID="Chart3" runat="server" Width="768px" Height="600px" BackColor="WhiteSmoke" BackSecondaryColor="AliceBlue" BorderlineDashStyle="Solid" BorderlineColor="Gray" BackGradientStyle="DiagonalLeft">
2 <Series>
3 <asp:Series Name="Series1" Color="Transparent" BorderColor="#0066FF" BorderWidth="2"></asp:Series>
4 </Series>
5 <ChartAreas>
6 <asp:ChartArea Name="ChartArea1">
7 <AxisY>
8 <MajorGrid LineColor="#999999" LineDashStyle="Solid" />
9 </AxisY>
10 <AxisX>
11 <MajorGrid LineColor="#999999" LineDashStyle="Solid" />
12 <LabelStyle Font="Microsoft Sans Serif, 8pt" />
13 </AxisX>
14 </asp:ChartArea>
15 </ChartAreas>
16 </asp:Chart>
后台代码：
View Code
1 Chart3.Series["Series1"].Points.DataBind(dt.DefaultView, "Feature", "FeatureScore", "LegendText=Feature,YValues=FeatureScore,ToolTip=FeatureScore");
2 Chart3.Series["Series1"].ChartType = SeriesChartType.Radar;
3 Chart3.Series["Series1"].IsValueShownAsLabel = true;
4 Chart3.DataBind();