MSChart的：如何分组RangeBar数据和文本标签，而不是指标？ [英] MSChart: How to group RangeBar data with text labels instead of indexes?

问题描述

我在找绘制出RangeBar图表区域（System.Windows.Forms.DataVisualization.Charting）数据和我有问题，分组数据时，我有文本值，在垂直轴上的标签。

I'm looking to plot data on a RangeBar chart area (System.Windows.Forms.DataVisualization.Charting) and I'm having issues grouping the data when I have text values for the labels on the vertical axis.

下面是相关的code：

Here's the pertinent code:

var connectedTimeRangeSeries = theChart.Series.Add("ConnectedTimeRangeSeries");
var connectedTimeRangesChartArea = theChart.ChartAreas["PerItemConnectedChartArea"];

connectedTimeRangeSeries.ChartArea = connectedTimeRangesChartArea.Name;
connectedTimeRangeSeries.ChartType = SeriesChartType.RangeBar;
connectedTimeRangeSeries.XValueType = ChartValueType.Auto;
connectedTimeRangeSeries.YValueType = ChartValueType.Auto;

for (int i = 0; i < timeRanges.Count; i++)
{
    string theLabel = timeRanges[i].ItemLabel;

    connectedTimeRangeSeries.Points.AddXY(timeRanges[i].ItemId + 1, timeRanges[i].StartConnectionTime, timeRanges[i].StopConnectionTime);
}

timeRanges 与拥有这些成员类型项目的列表（通过公共属性访问与相应的大写名称）：

timeRanges is a list with items having these member types (accessed through public properties with corresponding capitalized names):

private int itemId;
private string itemLabel;
private DateTime startConnectionTime;
private DateTime stopConnectionTime;

当我称之为 DataSeries.Points.AddXY（）与X型为一个整数（召回X是范围栏上的垂直轴）是我想要做什么。的时间段是根据该指数在底部图表进行分组：

When I call DataSeries.Points.AddXY() with the X type as an integer (recall X is the vertical axis on the range bar) it does what I want. The time ranges are grouped according to the index in the bottom graph:

不过，当我改变要尽量使用文本标签将它们分组，通过更换 AddXY 这一点：

However, when I change to try to use a text label to group them, by replacing AddXY with this:

connectedTimeRangeSeries.Points.AddXY(theLabel, timeRanges[i].StartConnectionTime, timeRanges[i].StopConnectionTime);

数据不再划分：

the data are no longer grouped:

这就像每个人都有自己的箱子，我只是希望他们通过标签结合使用。 （每个指数都有且只有一个标签。）

It's like each one gets its own bin, and I just want them to be combined by label. (Each index has one and only one label.)

任何想法？谢谢！

推荐答案

在数据点使用一个AxisLabel属性。 一种方式做这将是这样的：

Use AxisLabel property of the DataPoint. One way to do it would be something like this:

for (int i = 0; i < timeRanges.Count; i++)
{
    string theLabel = timeRanges[i].ItemLabel;
    int pointIndex = connectedTimeRangeSeries.Points.AddXY(timeRanges[i].ItemId + 1,   timeRanges[i].StartConnectionTime, timeRanges[i].StopConnectionTime);
    connectedTimeRangeSeries.Points[pointIndex].AxisLabel = theLabel;
}

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