用 Aspose.Words 净值在折线图中显示最新值

Question

按照 Working with Charts 教程，我一直在尝试在当前或上一年的图表线系列中显示最新值。我收到如下所示的两个矩阵，其中它们的计数属性始终介于 1 和 2 之间。如前所述，DateTime 矩阵可能有一个或两个列表，每个列表至少有 365 天。第二个矩阵每一天都有相应的double。

List<List<DateTime>> AxisX, List<List<double>> AxisY, List<string> seriesName

shape = (Shape)doc.Range.Bookmarks[bookmarkName.GetDescription()].BookmarkStart.NextSibling;
Chart chart = shape.Chart;
chart.Legend.Position = LegendPosition.TopRight;
chart.Legend.Overlay = true;
chart.Series.Clear();
chart.AxisX.CategoryType = AxisCategoryType.Time;
chart.AxisX.BaseTimeUnit = AxisTimeUnit.Days;
chart.AxisX.MajorUnitScale = AxisTimeUnit.Months;
chart.AxisX.MajorUnit = 1;
chart.AxisX.TickLabelAlignment = ParagraphAlignment.Center;

if (eixoX.Any() && eixoX.ElementAt(0).Any())
{
      chart.AxisX.Scaling.Maximum = new AxisBound(eixoX.ElementAt(0).Last());
      chart.AxisX.Scaling.Minimum = new AxisBound(eixoX.ElementAt(0).First());
}

直到现在，如果 AxisY[1] 具有如下 continuous 值，我能够在图表中显示最新值：

            chart.AxisX.NumberFormat.FormatCode = "mmm";
            eixosY.ForEach((eixoY, i) =>
            {
                if (eixoX.ElementAt(i).Any() && eixoY.Any())
                {
                    var x = eixoX.ElementAt(i).ToArray();
                    var y = eixoY.ToArray();
                    var s = nomeSeries.ElementAt(i);
                    chart.Series.Add(s, x, y);
                }
            });

然后我遍历 AxisY[1] 并获得最新值如下：

                var array = chart.Series.Count - 1;
                var serie = eixosY[array].ToArray();
                var last = 0;



                for (int i = serie.Length - 1; i >= 0; i--)
                {
                    if (Double.IsNaN(serie[i])) continue;
                    last = i;
                    break;
                }

                var labels = chart.Series[array].DataLabels;
                ChartDataLabel l = labels.Add(last);
                l.ShowValue = true;

按预期产生以下结果：

现在是问题。当 AxisY[1] 不连续时，我无法得到相同的结果。相反，我得到了这样的东西：
我只是无法像上一张图片那样显示元组 X 和 Y 值。我希望图表显示值 57.1，因为它是 AxisY[1]:

中数据的最新值

-       y   {double[366]}   double[]
        [0] 29.9338 double
        [1] 29.5862 double
        [2] NaN double
        [3] NaN double
        [4] NaN double
        [5] NaN double
        [6] NaN double
        [7] NaN double
        [8] NaN double
        [9] NaN double
        [10]    NaN double
        [11]    NaN double
        [12]    NaN double
        [13]    NaN double
        [14]    NaN double
        [15]    NaN double
        [16]    NaN double
        [17]    NaN double
        [18]    NaN double
        [19]    NaN double
        [20]    NaN double
        [21]    NaN double
        [22]    NaN double
        [23]    NaN double
        [24]    NaN double
        [25]    NaN double
        [26]    NaN double
        [27]    NaN double
        [28]    NaN double
        [29]    NaN double
        [30]    NaN double
        [31]    NaN double
        [32]    NaN double
        [33]    NaN double
        [34]    23.282  double
        [35]    NaN double
        [36]    NaN double
        [37]    NaN double
        .
        . 
        .
        [147]   NaN double
        [148]   16.5327 double
        .
        .
        .       
        .
        [254]   57.1    double

任何帮助将不胜感激。提前致谢。

Answer 1

在您的情况下，您不需要使用 DataLabels.Add method, since it is obsolete. It is enough to set ChartSeries.HasDataLabels 属性到 true 然后通过索引访问所需的 DataLabel。我创建了一个简单的代码示例，其中 X 值在中间和末尾具有 NaN 值。如屏幕截图所示，数据标签正确显示。

Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);

Shape shape = builder.InsertChart(ChartType.Line, 500, 300);
Chart chart = shape.Chart;

chart.Series.Clear();

double[] xValues = new double[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };
double[] yValues = new double[] { 1, 2, double.NaN, double.NaN, 5, 6, 7, 8, 9, 10, 11, double.NaN };

ChartSeries series = chart.Series.Add("Test", xValues, yValues);

// Determine the last no NaN value index.
int last = yValues.Length - 1;
while (double.IsNaN(yValues[last]) && last > 0)
    last--;

// Enable data labels.
series.HasDataLabels = true;
// Display the value of the last not NaN value.
series.DataLabels[last].ShowValue = true;

doc.Save(@"C:\Temp\out.docx");

用 Aspose.Words 净值在折线图中显示最新值

Showing the latest value in a line chart with Aspose.Words Net

aspose.words