Diagram till bild med Node.js via C++

Rendering av diagram

Aspose.Cells API:er stödjer konvertering av Excel-diagram till bildformat utan att kräva ytterligare verktyg eller applikationer. För att möjliggöra rendering erbjuder Chart-klassen toImage(string) metoder med olika överlagrade versioner för att bäst passa applikationsbehoven.

Rendera diagram till bilder

Metoden Chart.toImage(string) har olika överlagringar för att stödja enkel samt avancerad rendering. Om applikationskravet är att rendera diagrammet i dess standardmått rekommenderar vi att du använder metoden Chart.toImage(string) som följer.

const path = require("path");
const AsposeCells = require("aspose.cells.node");

// The path to the documents directory.
const dataDir = path.join(__dirname, "data");

// Instantiating a Workbook object
const workbook = new AsposeCells.Workbook();
// Adding a new worksheet to the Workbook
const sheetIndex = workbook.getWorksheets().add();
// Obtaining the reference of the newly added worksheet by passing its index to WorksheetCollection
const worksheet = workbook.getWorksheets().get(sheetIndex);

// Adding sample values to cells
worksheet.getCells().get("A1").putValue(50);
worksheet.getCells().get("A2").putValue(100);
worksheet.getCells().get("A3").putValue(150);
worksheet.getCells().get("B1").putValue(4);
worksheet.getCells().get("B2").putValue(20);
worksheet.getCells().get("B3").putValue(50);

// Adding a chart to the worksheet
const chartIndex = worksheet.getCharts().add(AsposeCells.ChartType.Column, 5, 0, 15, 5);
// Accessing the instance of the newly added chart
const chart = worksheet.getCharts().get(chartIndex);
// Adding Series Collection (chart data source) to the chart ranging from "A1" cell to "B3"
chart.getNSeries().add("A1:B3", true);

// Converting chart to image
chart.toImage(path.join(dataDir, "chartEMF_out.emf"), AsposeCells.ImageType.Emf);

// Converting chart to Bitmap
chart.toImage(path.join(dataDir, "chartBMP_out.bmp"), AsposeCells.ImageType.Bmp);

Det är också möjligt att rendera diagram till bilder med avancerade inställningar. Aspose.Cells API:er har en exponerad överlagrad version av Chart.toImage(string)-metoden som accepterar en instans av ImageOrPrintOptions, samtidigt som man kan specificera parametrar som upplösning, mjukhetsläge, bildformat och så vidare.

const path = require("path");
const AsposeCells = require("aspose.cells.node");

// The path to the documents directory.
const dataDir = path.join(__dirname, "data");
const filePath = path.join(dataDir, "sample.xlsx");
// Instantiating a Workbook object
const workbook = new AsposeCells.Workbook();
// Adding a new worksheet to the Workbook
const sheetIndex = workbook.getWorksheets().add();
// Obtaining the reference of the newly added worksheet by passing its index to WorksheetCollection
const worksheet = workbook.getWorksheets().get(sheetIndex);

// Adding sample values to cells
worksheet.getCells().get("A1").putValue(50);
worksheet.getCells().get("A2").putValue(100);
worksheet.getCells().get("A3").putValue(150);
worksheet.getCells().get("B1").putValue(4);
worksheet.getCells().get("B2").putValue(20);
worksheet.getCells().get("B3").putValue(50);

// Adding a chart to the worksheet
const chartIndex = worksheet.getCharts().add(AsposeCells.ChartType.Column, 5, 0, 15, 5);
// Accessing the instance of the newly added chart
const chart = worksheet.getCharts().get(chartIndex);
// Adding Series Collection (chart data source) to the chart ranging from "A1" cell to "B3"
chart.getNSeries().add("A1:B3", true);

// Create an instance of ImageOrPrintOptions and set a few properties
const options = new AsposeCells.ImageOrPrintOptions();
options.setVerticalResolution(300);
options.setHorizontalResolution(300);

// Convert chart to image with additional settings
chart.toImage(path.join(dataDir, "chartPNG_out.png"), options);

Supportade diagramtyper för rendering

Det finns några diagramtyper som för närvarande inte stöds för rendering. Sådana diagramtyper innehåller N i Stöds kolumnen i nedanstående tabell.

Diagramtyp	Diagramundertyp	Stöd
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

Om du försöker rendera de icke-supportade diagramtyperna till bild eller PDF kan du sluta med bilder som är 0 i storlek eller blanka PDF:er.

Fortsatta ämnen

• Konvertera Diagram till PDF