Steema TeeChart Xamarin Forms - X 轴日期时间标签

Question

我正在使用 Steema TeeChart 构建烛台图表。我有这个 class 的数据：

public class Candles
    {
        public DateTime date { get; set; }
        public double open { get; set; }
        public double high { get; set; }
        public double low { get; set; }
        public double close { get; set; }

        public Candles (long date, double open, double high, double low, double close)
        {
            this.date = epoch2string(date/1000000);
            this.open = open;
            this.high = high;
            this.low = low;
            this.close = close;
        }

        public Candles(int date)
        {
            this.date = epoch2string(date);
        }

        private DateTime epoch2string(long epoch) {
            return new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc).AddSeconds(epoch); 
        }
    }

我正在循环添加数据：

foreach (var item in candleList) {
            chartStyle.Add (item.open, item.high, item.low, item.close);
        }

但是我应该如何将 class 的 "date" 值添加为 X 轴上的标签？

Answer 1

将日期作为 DateTime 值添加到每个蜡烛会自动执行此操作，例如：

  Steema.TeeChart.Styles.Candle candle1 = new Steema.TeeChart.Styles.Candle(tChart1.Chart);
  DateTime date = DateTime.Now;

  Random tmp = new Random();

  for (int i = 0; i < 10; i++)
  {
    double open = tmp.Next();
    double high = tmp.Next();
    double low = tmp.Next();
    double close = tmp.Next();

    candle1.Add(date.AddDays(i), open, high, low, close);
  }

你的情况应该是：

    foreach (var item in candleList) {
        chartStyle.Add (item.date, item.open, item.high, item.low, item.close);
    }

根据某些图表设置，这可能不是自动的，在这种情况下，您可以强制这样做：

  candle1.XValues.DateTime = true;
  tChart1.Axes.Bottom.Labels.Style = AxisLabelStyle.Value;
  tChart1.Axes.Bottom.Labels.DateTimeFormat = "dd/MMM";

基于我的示例代码。

如果您想将日期添加为文本标签并删除周末间隔，您可以使用 RemoveGaps property or as shown in the All Features\Welcome !\Chart styles\Financial\Candle (OHLC)\Axis Labels no Weekends example at the features demo included with TeeChart for .NET. I posted an example based on the mentiond demo here。

Steema TeeChart Xamarin Forms - X 轴日期时间标签

Steema TeeChart Xamarin Forms - X axis DateTime labels

teechart

xamarin

xamarin.forms