单个图表中多个 ChartAreas 的单独图例

Question

我似乎无法让我的各个子图表（包含在我的单个图表对象中）为各自的数据系列托管各个图例。我想知道这是否可行，如果可以，我可以在我的代码中调整什么来实现这种效果。

感谢您的帮助

代码如下：

chart_MyChart.Legends.Clear();

ChartArea chartArea_MyData = new ChartArea("My Data");
ChartArea chartArea_YourData = new ChartArea("Your Data");
ChartArea chartArea_OtherData = new ChartArea("Other Data");

chart_MyChart.ChartAreas.Clear();
chart_MyChart.ChartAreas.Add(chartArea_MyData);
chart_MyChart.ChartAreas.Add(chartArea_YourData);
chart_MyChart.ChartAreas.Add(chartArea_OtherData);             

/* Chart Area: My Data */
Series series01 = this.chart_MyChart.Series.Add("My first series");
series01.ChartArea = chartArea_MyData.Name;
Series series02 = this.chart_MyChart.Series.Add("My second series");
series02.ChartArea = chartArea_MyData.Name;

Legend legend01 = new Legend(series01.Name);
Legend legend02 = new Legend(series02.Name);

legend01.DockedToChartArea = chartArea_MyData.Name;
legend02.DockedToChartArea = chartArea_MyData.Name;

chart_MyChart.Legends.Add(legend01);
chart_MyChart.Legends.Add(legend02);

/* Chart Area: Your Data */
Series series03 = this.chart_MyChart.Series.Add("Your first series");
series03.ChartArea = chartArea_YourData.Name;
Series series04 = this.chart_MyChart.Series.Add("Your second series");
series04.ChartArea = chartArea_YourData.Name;

Legend legend03 = new Legend(series03.Name);
Legend legend04 = new Legend(series04.Name);

legend03.DockedToChartArea = chartArea_YourData.Name;
legend04.DockedToChartArea = chartArea_YourData.Name;

chart_MyChart.Legends.Add(legend03);
chart_MyChart.Legends.Add(legend04);

/* Chart Area: Other Data */
Series series05 = this.chart_MyChart.Series.Add("Other series");
series05.ChartArea = chartArea_OtherData.Name;

Legend legend05 = new Legend(series05.Name);

legend05.DockedToChartArea = chartArea_OtherData.Name;

chart_MyChart.Legends.Add(legend05);

foreach(Legend legend in chart_MyChart.Legends)
{
    legend.IsDockedInsideChartArea = true;
}

foreach(widget myWidget in some.widget)
{
    series01.Points.AddXY(widget.timeStamp, widget.data1);
    series02.Points.AddXY(widget.timeStamp, widget.data2);
    series03.Points.AddXY(widget.timeStamp, widget.data3);
    series04.Points.AddXY(widget.timeStamp, widget.data4);
    series05.Points.AddXY(widget.timeStamp, widget.data5);
}

Answer 1

乍一看，您似乎忽略了该系列和 Legend 之间的关联，这是您可以下载的 WebSamples 项目here，查看完整的源示例确实很有帮助。

在 MultiLegends 部分，代码如下所示：

            // Add a second legend
            Legend secondLegend = new Legend("Second");
            secondLegend.BackColor = Color.FromArgb(((System.Byte)(220)), ((System.Byte)(255)), ((System.Byte)(255)), ((System.Byte)(255)));
            secondLegend.BorderColor = Color.Gray;
            secondLegend.Font = this.Chart1.Legends["Default"].Font;

            this.Chart1.Legends.Add(secondLegend);

            // Associate Series 2 with the second legend 
            this.Chart1.Series["Series 2"].Legend = "Second";

我在您的代码中唯一没有看到的是最后一行关联。