Microsoft^® Visio 通过 Python 进行格式转换

将 MS Visio 图表转换为 HTML、PDF 和图像，包括 JPG、BMP、PNG、TIFF，以构建跨平台Python应用程序。

对于任何 Microsoft Visio 格式的渲染解决方案，例如设计流程图和业务流程图等 Python Visio API 以一种简单的方式促进所有复杂的绘图。使用加载源文件 Diagram 类并使用适当的参数调用 save 方法。

相互转换 Visio 文件

程序员可以轻松转换 VSDX、VSX、VTX、VDX、VSSX、VSTX、VSDM、VSSM、VSTM 格式以及加载 VDW、VSD、 VSS、VST 并呈现为 PDF、HTML 和图像。考虑 VSDX 到 VDX 的场景，过程是，使用 diagram 类加载源 VSDX 文件并通过提供输出文件和调用 save 方法保存文件格式作为参数。

Python VSDX 到 VDX 转换的代码

	// Load the VSDX in an object of Diagram
	Diagram visio = new Diagram("template.vsdx");

	// save VSDX as VDX
	visio.save("output.vdx", SaveFileFormat.VDX);

view raw convert-vsdx-to-vdx.java hosted with ❤ by GitHub

Visio 到图像转换

对于通用转换，将 visio 文件转换为图像的过程是相同的。只需通过 Diagram 类加载文件并使用输出文件和 SaveFileFormat 输出参数调用 save 方法。并且每当需要定义特定选项时，开发人员可以在将 diagram 页面转换为图像时使用 ImageSaveOptions 类，并使用 SVGSaveOptions 进行 SVG 转换。

Python 将 Visio 转换为图像格式的代码

	Diagram vsdxtoImages = new Diagram("sourceDocument.vsdx");

	ImageSaveOptions ImgOptions = new ImageSaveOptions(SaveFileFormat.JPEG);

	// specify the quality level to use during compositing.
	ImgOptions.setCompositingQuality(CompositingQuality.HIGH_QUALITY);

	//The default value is 0.5. The value must be in the range between 0 and 1.
	ImgOptions.setImageBrightness(1f);

	ImgOptions.setDefaultFont("MS Gothic");

	// sets the number of pages to render in image.
	ImgOptions.setPageCount(2);

	// sets the 0-based index of the first page to render. Default is 0.
	ImgOptions.setPageIndex(0);

	// set page size
	PageSize pgSize = new PageSize(PaperSizeFormat.A_1);
	ImgOptions.setPageSize(pgSize);

	// discard saving background pages of the Visio diagram
	ImgOptions.setSaveForegroundPagesOnly(true);

	// sets the color mode for the generated images.
	ImgOptions.setImageColorMode(ImageColorMode.BLACK_AND_WHITE);

	// the default value is 0.5. The value must be in the range between 0 and 1.
	ImgOptions.setImageContrast(1f);

	// this property has effect only when saving to raster image formats.
	ImgOptions.setInterpolationMode(InterpolationMode.NEAREST_NEIGHBOR);

	// the value may vary from 0 to 100 where 0 means worst quality,
	ImgOptions.setJpegQuality(100);

	// set a value specifying how pixels are offset during rendering.
	ImgOptions.setPixelOffsetMode(PixelOffsetMode.HIGH_SPEED);

	// sets the resolution for the generated images, in dots per inch. The default value is 96.
	ImgOptions.setResolution(2f);

	// the default value is 1.0. The value must be greater than 0.
	ImgOptions.setScale(1f);

	// specify whether smoothing (antialiasing) is applied to lines
	// and curves and the edges of filled areas.
	ImgOptions.setSmoothingMode(SmoothingMode.HIGH_QUALITY);
	// sets the type of compression to apply when saving generated images to the TIFF format.
	ImgOptions.setTiffCompression(TiffCompression.CCITT_3);

	// save in visio file into image of choice
	vsdxtoImages.save("visiofiletoimage_Out.jpeg", ImgOptions);

view raw convert-vsdx-to-images.java hosted with ❤ by GitHub

Python 将 Visio 转换为 SVG 的代码

	Diagram vsdxTosvg = new Diagram("sourceFile.vsdx");

	SVGSaveOptions svgOpts = new SVGSaveOptions();

	svgOpts.setDefaultFont("MS Gothic");

	// sets the 0-based index of the first page to render. Default is 0.
	svgOpts.setPageIndex(0);

	// set page size
	PageSize pgSize = new PageSize(PaperSizeFormat.A_1);
	svgOpts.setPageSize(pgSize);

	vsdxTosvg.save("visio-to-svg.svg", svgOpts);

view raw convert-vsdx-to-svg.java hosted with ❤ by GitHub

将 Visio 转换为 PDF 和 HTML

API 能够将 visio 格式转换为 PDF 和 HTML。只需使用保存文件格式保存方法中的 .PDF 和 SaveFileFormat.HTML 作为参数。对于特殊设置，开发人员可以使用 PdfSaveOptions 和 HTMLSaveOptions 类。

Python Visio 到 PDF 转换的代码

	// call the diagram constructor to load diagram from a VSDX file
	Diagram vsdxtopdf = new Diagram("sourfile.vsdx");

	// Options when saving a diagram into the PDF format
	PdfSaveOptions pdfOpts = new PdfSaveOptions();

	// discard saving background pages of the Visio diagram
	pdfOpts.setSaveForegroundPagesOnly(true);

	// specify the quality of JPEG compression for images (if JPEG compression is used). Default is 95.
	pdfOpts.setJpegQuality(100);

	// specify default font name
	pdfOpts.setDefaultFont("Arial");

	// conformance level for generated PDF document.
	pdfOpts.setCompliance(PdfCompliance.PDF_15);

	// sets a digital signature details. If not set, then no signing will be performed.
	pdfOpts.setDigitalSignatureDetails(new PdfDigitalSignatureDetails(cert, "Test Signing", "Aspose Office", DateTime.getNow(), PdfDigitalSignatureHashAlgorithm.SHA_256));

	// set encription details
	PdfEncryptionDetails encriptionDetails = new PdfEncryptionDetails("user password", "Owner Password", PdfEncryptionAlgorithm.RC_4_128);
	pdfOpts.setEncryptionDetails(encriptionDetails);
	// sets the number of pages to render in PDF.
	pdfOpts.setPageCount(2);
	// sets the 0-based index of the first page to render. Default is 0.
	pdfOpts.setPageIndex(0);

	// set page size
	PageSize pgSize = new PageSize(PaperSizeFormat.A_1);
	pdfOpts.setPageSize(pgSize);

	// save in visio file into PDF
	vsdxtopdf.save("UsePDFSaveOptions_Out.pdf", pdfOpts);

view raw convert-vsdx-to-pdf.java hosted with ❤ by GitHub

Python 将 Visio 转换为 HTML 文件的代码

	// call the diagram constructor to load diagram from a VSDX file
	Diagram vsdxtohtml = new Diagram("sourceFile.vsdx");

	// Options when saving a diagram into the HTML format
	HTMLSaveOptions htmlOpt = new HTMLSaveOptions();

	htmlOpt.setDefaultFont("MS Gothic");
	// sets the number of pages to render in HTML.
	htmlOpt.setPageCount(2);
	// sets the 0-based index of the first page to render. Default is 0.
	htmlOpt.setPageIndex(0);

	// set page size
	PageSize pgSize = new PageSize(PaperSizeFormat.A_1);
	htmlOpt.setPageSize(pgSize);
	// discard saving background pages of the Visio diagram
	htmlOpt.setSaveForegroundPagesOnly(true);

	// specify whether to include the toolbar or not. Default value is true.
	htmlOpt.setSaveToolBar(false);
	// set title of the HTML document
	htmlOpt.setTitle("Title goes here");

	// save visio file in HTML file format
	vsdxtohtml.save("UseHTMLSaveOptions_Out.html", htmlOpt);