图表转为图像

渲染图表

Aspose.Cells for Python via .NET API 支持将 Excel 图表转换为图像格式，无需任何额外的工具或应用程序。为了提供渲染支持，Chart 类提供了 to_image 方法以及多种重载以最佳适应应用需求。

将图表渲染为图像

Chart.to_image方法具有多种重载，支持简单和高级渲染。如果应用程序的要求是在其默认尺寸下渲染图表，我们建议您使用Chart.to_image方法。

也可以使用高级设置将图表渲染为图像。Aspose.Cells for Python via .NET API 提供了 Chart.to_image 方法的重载版本，可以接受 ImageOrPrintOptions 实例，并允许指定诸如分辨率、平滑模式、图像格式等参数。

from aspose.cells.rendering import ImageOrPrintOptions
from aspose.pydrawing.drawing2d import SmoothingMode

options = ImageOrPrintOptions()
options.vertical_resolution = 300
options.horizontal_resolution = 300
options.smoothing_mode = SmoothingMode.ANTI_ALIAS
#  For complete examples and data files, please go to https:# github.com/aspose-cells/Aspose.Cells-for-.NET
#  Create an instance of ImageOrPrintOptions and set a few properties
options = options
#  Convert chart to image with additional settings
chart.to_image(dataDir + "chartPNG_out.png", options)

支持的图表类型的渲染

目前有一些不支持渲染的图表类型。这些图表类型在下表的Supported列中包含N。

图表类型	图表子类型	支持
Column	Column	Y
	ColumnStacked	Y
	Column100PercentStacked	Y
	Column3DClustered	Y
	Column3DStacked	Y
	Column3D100PercentStacked	Y
	Column3D	Y
Bar	Bar	Y
	BarStacked	Y
	Bar100PercentStacked	Y
	Bar3DClustered	Y
	Bar3DStacked	Y
	Bar3D100PercentStacked	Y
Line	Line	Y
	LineStacked	Y
	Line100PercentStacked	Y
	LineWithDataMarkers	Y
	LineStackedWithDataMarkers	Y
	Line100PercentStackedWithDataMarkers	Y
	Line3D	Y
Pie	Pie	Y
	Pie3D	Y
	PiePie	Y
	PieExploded	Y
	Pie3DExploded	Y
	PieBar	Y
Scatter	Scatter	Y
	ScatterConnectedByCurvesWithDataMarker	Y
	ScatterConnectedByCurvesWithoutDataMarker	Y
	ScatterConnectedByLinesWithDataMarker	Y
	ScatterConnectedByLinesWithoutDataMarker	Y
Area	Area	Y
	AreaStacked	Y
	Area100PercentStacked	Y
	Area3D	Y
	Area3DStacked	Y
	Area3D100PercentStacked	Y
Doughnut	Doughnut	Y
	DoughnutExploded	Y
Radar	Radar	Y
	RadarWithDataMarkers	Y
	RadarFilled	Y
Surface	Surface3D	N
	SurfaceWireframe3D	N
	SurfaceContour	N
	SurfaceContourWireframe	N
Bubble	Bubble	Y
	Bubble3D	N
Stock	StockHighLowClose	Y
	StockOpenHighLowClose	Y
	StockVolumeHighLowClose	Y
	StockVolumeOpenHighLowClose	Y
Cylinder	Cylinder	Y
	CylinderStacked	Y
	Cylinder100PercentStacked	Y
	CylindricalBar	Y
	CylindricalBarStacked	Y
	CylindricalBar100PercentStacked	Y
	CylindricalColumn3D	Y
Cone	Cone	Y
	ConeStacked	Y
	Cone100PercentStacked	Y
	ConicalBar	Y
	ConicalBarStacked	Y
	ConicalBar100PercentStacked	Y
	ConicalColumn3D	Y
Pyramid	Pyramid	Y
	PyramidStacked	Y
	Pyramid100PercentStacked	Y
	PyramidBar	Y
	PyramidBarStacked	Y
	PyramidBar100PercentStacked	Y
	PyramidColumn3D	Y
BoxWhisker	BoxWhisker	Y
Funnel	Funnel	Y
ParetoLine	ParetoLine	Y
Sunburst	Sunburst	Y
Treemap	Treemap	Y
Waterfall	Waterfall	Y
Histogram	Histogram	Y
Map	Map	N

如果尝试将不受支持的图表类型渲染为图像或PDF，则可能会得到大小为0的图像或空白PDF。

高级主题

• 将图表转换为PDF