GetPrevChart

返回上一个内联图表（如果存在）。

语法

expression.GetPrevChart();

expression - 表示 ApiChart 类的变量。

参数

此方法没有任何参数。

返回值

ApiChart | null

示例

此示例展示如何获取上一个图表。

// How to update minor horizontal gridlines of the previous chart.

// Get the previous chart and set its horizontal lines as a stroke. 

let doc = Api.GetDocument();
let paragraph = doc.GetElement(0);
let chart = Api.CreateChart("bar3D", [
	[200, 240, 280],
	[250, 260, 280]
], ["Projected Revenue", "Estimated Costs"], [2014, 2015, 2016], 4051300, 2347595, 24);
let fill = Api.CreateSolidFill(Api.RGB(51, 51, 51));
chart.SetSeriesFill(fill, 0, false);
fill = Api.CreateSolidFill(Api.RGB(255, 111, 61));
chart.SetSeriesFill(fill, 1, false);
chart.SetVerAxisTitle("USD In Hundred Thousands", 10);
chart.SetHorAxisTitle("Year", 11);
chart.SetLegendPos("bottom");
chart.SetShowDataLabels(false, false, true, false);
chart.SetTitle("Financial Overview", 13);
paragraph.AddDrawing(chart);
let copyChart = chart.Copy();
paragraph.AddDrawing(copyChart);
let prevChart = copyChart.GetPrevChart();
let stroke = Api.CreateStroke(1 * 150, Api.CreateSolidFill(Api.RGB(255, 111, 61)));
prevChart.SetMinorHorizontalGridlines(stroke);