Aspose.Slides for .NET是一个独特的演示处理API，它允许应用程序读取、写入、修改和转换PowerPoint演示文稿。作为一个独立的API，它提供了管理PowerPoint关键功能的功能，如管理文本、形状、表格和动画、向幻灯片添加音频和视频、预览幻灯片等，而不需要Microsoft PowerPoint。
Aspose.Slides for .NET迎来2020年9月更新v20.9，实现自主的跨平台3D引擎，在SVG中生成支持单个tspan的Id属性，修复保存.ppt文件时发生异常等诸多问题。
具体更新内容
| key | 概述 | 类别 |
|---|---|---|
| SLIDESNET-42081 | 在SVG中生成支持单个tspan的Id属性 | 增强功能 |
| SLIDESNET-42123 | 保存.ppt文件时发生异常 | Bug修复 |
| SLIDESNET-42117 | 音频帧未通过VideoPlayerHtmlController导出为HTML | Bug修复 |
| SLIDESNET-42111 | 导出的PDF中缺少文本 | Bug修复 |
| SLIDESNET-42098 | 使用空数据生成树图图表的操作不正确。 | Bug修复 |
| SLIDESNET-42096 | 将生成的缩略图中的形状滑动为空 | Bug修复 |
| SLIDESNET-42094 | 组形状WriteAsSvg（）-旋转丢失 | Bug修复 |
公共API更改
添加3D支持
在Aspose.Slides 20.9 中宣布了自己的跨平台3D引擎。新的3D引擎可以导出和栅格化具有3D效果的形状和文本。
在以前的版本中，已应用3D效果的“幻灯片”形状被渲染为平坦。但是，现在可以使用成熟的3D渲染形状。此外，现在可以通过Slides公共API创建具有3D效果的形状：
using (Presentation pres = new Presentation()){
IAutoShape shape = pres.Slides[0].Shapes.AddAutoShape(ShapeType.Rectangle, 200, 150, 200, 200);
shape.TextFrame.Text = "3D";
shape.TextFrame.Paragraphs[0].ParagraphFormat.DefaultPortionFormat.FontHeight = 64;
shape.ThreeDFormat.Camera.CameraType = CameraPresetType.OrthographicFront;
shape.ThreeDFormat.Camera.SetRotation(20, 30, 40);
shape.ThreeDFormat.LightRig.LightType = LightRigPresetType.Flat;
shape.ThreeDFormat.LightRig.Direction = LightingDirection.Top;
shape.ThreeDFormat.Material = MaterialPresetType.Powder;
shape.ThreeDFormat.ExtrusionHeight = 100;
shape.ThreeDFormat.ExtrusionColor.Color = Color.Blue;
pres.Slides[0].GetThumbnail(2, 2).Save("sample_3d.png");
pres.Save("sandbox_3d.pptx", SaveFormat.Pptx);}
渲染的缩略图如下所示：
添加IBulletFormatEffectiveData.FillFormat属性
新的FillFormat属性已添加到IBulletFormatEffectiveData接口。使用此属性可以获取段落项目符号填充的有效值。
下面的代码段演示了如何检索项目符号的填充有效数据：
using (Presentation pres = new Presentation("SomePresentation.pptx"))
{ // Assume that the first shape on the first slide is AutoShape with some text...
// Output information about text paragraphs' bullets
AutoShape autoShape = (AutoShape)pres.Slides[0].Shapes[0]; foreach (Paragraph para in autoShape.TextFrame.Paragraphs)
{
IBulletFormatEffectiveData bulletFormatEffective = para.ParagraphFormat.Bullet.GetEffective();
Console.WriteLine("Bullet type: " + bulletFormatEffective.Type); if (bulletFormatEffective.Type != BulletType.None)
{
Console.WriteLine("Bullet fill type: " + bulletFormatEffective.FillFormat.FillType); switch (bulletFormatEffective.FillFormat.FillType)
{ case FillType.Solid:
Console.WriteLine("Solid fill color: " + bulletFormatEffective.FillFormat.SolidFillColor); break; case FillType.Gradient:
Console.WriteLine("Gradient stops count: " + bulletFormatEffective.FillFormat.GradientFormat.GradientStops.Count); foreach (IGradientStopEffectiveData gradStop in bulletFormatEffective.FillFormat.GradientFormat.GradientStops)
Console.WriteLine(gradStop.Position + ": " + gradStop.Color); break; case FillType.Pattern:
Console.WriteLine("Pattern style: " + bulletFormatEffective.FillFormat.PatternFormat.PatternStyle);
Console.WriteLine("Fore color: " + bulletFormatEffective.FillFormat.PatternFormat.ForeColor);
Console.WriteLine("Back color: " + bulletFormatEffective.FillFormat.PatternFormat.BackColor); break;
}
}
Console.WriteLine();
}
}
Aspose.Slides.Export.Web成员应用程序示例
下面的代码示例演示了Aspose.Slides.Export.Web成员的实际应用。它代表Presentation类的扩展，该扩展创建并设置一个WebDocument对象，该对象将演示文稿保存为HTML。请注意，转换模板未包含在示例中。
public static class PresentationExtensions
{ public static WebDocument ToSinglePageWebDocument( this Presentation pres,
WebDocumentOptions options, string templatesPath, string outputPath)
{
WebDocument document = new WebDocument(options);
SetGlobals(document, options, outputPath); document.Global.Put("slidesPath", outputPath); document.Global.Put("stylesPath", outputPath); document.AddCommonInputOutput(options, templatesPath, outputPath, pres); return document;
}
private static void SetGlobals(WebDocument document, WebDocumentOptions options, string outputPath)
{ string imagesPath = Path.Combine(outputPath, "images"); string fontsPath = Path.Combine(outputPath, "fonts"); string mediaPath = Path.Combine(outputPath, "media"); document.Global.Put("slideMargin", 10); document.Global.Put("embedImages", options.EmbedImages); document.Global.Put("imagesPath", imagesPath); document.Global.Put("fontsPath", fontsPath); document.Global.Put("mediaPath", mediaPath);
}
private static void AddCommonInputOutput(this WebDocument document, WebDocumentOptions options, string templatesPath, string outputPath, Presentation pres)
{ string stylesPath = document.Global.Get<string>("stylesPath"); document.Input.AddTemplate<Presentation>("styles-pres", Path.Combine(templatesPath, @"styles\pres.css")); document.Input.AddTemplate<MasterSlide>("styles-master", Path.Combine(templatesPath, @"styles\master.css")); document.Input.AddTemplate<Presentation>("index", Path.Combine(templatesPath, "index.html")); document.Input.AddTemplate<Slide>("slide", Path.Combine(templatesPath, "slide.html")); document.Input.AddTemplate<AutoShape>("autoshape", Path.Combine(templatesPath, "autoshape.html")); document.Input.AddTemplate<TextFrame>("textframe", Path.Combine(templatesPath, "textframe.html")); document.Input.AddTemplate<Paragraph>("paragraph", Path.Combine(templatesPath, "paragraph.html")); document.Input.AddTemplate<Paragraph>("bullet", Path.Combine(templatesPath, "bullet.html")); document.Input.AddTemplate<Portion>("portion", Path.Combine(templatesPath, "portion.html")); document.Input.AddTemplate<VideoFrame>("videoframe", Path.Combine(templatesPath, "videoframe.html")); document.Input.AddTemplate<PictureFrame>("pictureframe", Path.Combine(templatesPath, "pictureframe.html")); document.Input.AddTemplate<Table>("table", Path.Combine(templatesPath, "table.html")); document.Input.AddTemplate<Shape>("shape", Path.Combine(templatesPath, "shape.html")); document.Output.Add(Path.Combine(outputPath, "index.html"), "index", pres); document.Output.Add(Path.Combine(stylesPath, "pres.css"), "styles-pres", pres); document.Output.Add(Path.Combine(stylesPath, "master.css"), "styles-master", (MasterSlide)pres.Masters[0]); if (!options.EmbedImages)
{ string imagesPath = document.Global.Get<string>("imagesPath"); document.AddImagesOutput(imagesPath, pres);
}
}
private static void AddImagesOutput(this WebDocument document, string outputPath, Presentation pres)
{ for (int index = 0; index < pres.Images.Count; index++)
{
IPPImage image = pres.Images[index]; string path; string ext; if (image.ContentType == "image/x-emf"
|| image.ContentType == "image/x-wmf") //save metafile as PNG to make it supported by various browsers
{
ext = "png";
path = Path.Combine(outputPath, string.Format("image{0}.{1}", index, ext)); var bitmap = ImageHelper.MetafileToBitmap(image); document.Output.Add(path, new ThumbnailOutputFile(bitmap), image); continue;
}
ext = MimeTypesMap.GetExtension(image.ContentType);
path = Path.Combine(outputPath, string.Format("image{0}.{1}", index, ext)); document.Output.Add(path, image);
}
}
}
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