Spire.Presentation for .NET是專業(yè)的 PowerPoint® 組件，使用該組件，開(kāi)發(fā)者可以在 .NET 平臺(tái)上對(duì) PowerPoint® 文檔進(jìn)行生成、讀取、寫(xiě)入、修改、轉(zhuǎn)換和打印等操作。

Spire.Presentation for .NET支持 PPT、PPS、PPTX、PPSX 格式的 PowerPoint® 文檔，支持的主要功能有寫(xiě)入文本、插入圖片、添加圖形、表格、動(dòng)畫(huà)效果、音頻和視頻等元素到幻燈片。Spire.Presentation 也支持將幻燈片轉(zhuǎn)換為 EMF、JPG、TIFF、PDF、XPS、SVG、HTML 格式文件。

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1. 問(wèn)：如何給PowerPoint文檔添加密碼保護(hù)？

答：請(qǐng)使用Encrypt方法給文檔加密。全部代碼：

Presentation presentation = new Presentation();
presentation.LoadFromFile("sample.pptx");
presentation.Encrypt("test");
presentation.SaveToFile("encrypt.pptx", FileFormat.Pptx2010);

2. 問(wèn)：如何轉(zhuǎn)換PowerPoint文件到PDF？

答：只需要加載文件，然后保存成PDF即可。全部代碼：

Presentation presentation = new Presentation();

//加載文件
presentation.LoadFromFile("ppt.ppt");

//把文件保存成PDF
presentation.SaveToFile("ToPdf.pdf", FileFormat.PDF);

3. 問(wèn)：如何將幻燈片保存成圖片？

答：請(qǐng)使用SaveAsImage方法將幻燈片保存到Image中，然后將Image對(duì)象保存成圖片。全部代碼：

Presentation ppt = new Presentation();
ppt.LoadFromFile(@"F:\testing\Sample.pptx");
for (int i = 0; i < ppt.Slides.Count; i++) { //將幻燈片保存到Image中 Image image = ppt.Slides[i].SaveAsImage(); String fileName = String.Format("5614-img-{0}.png", i); //將image保存成文件 image.Save(fileName, System.Drawing.Imaging.ImageFormat.Png); }

4. 問(wèn)：如何設(shè)置文本框中文本的對(duì)齊方式？

答：請(qǐng)使用Alignment設(shè)置文本的對(duì)齊方式。全部代碼：

Presentation presentation = new Presentation();

//添加一個(gè)shape
IAutoShape shape = presentation.Slides[0].Shapes.AppendShape(ShapeType.Rectangle, new RectangleF(50, 70, 600, 400));

//設(shè)置shape里面第一段的對(duì)齊方式為左對(duì)齊
shape.TextFrame.Paragraphs[0].Alignment = TextAlignmentType.Left;
shape.Fill.FillType = FillFormatType.None;

//添加文本
shape.TextFrame.Text = "Demo about Alignment";
presentation.SaveToFile("alignment.pptx", FileFormat.Pptx2010);

5. 問(wèn)：如何提取PowerPoint中的文本？

答：請(qǐng)您使用TextParagraph的Text屬性。全部代碼：

StringBuilder sb = new StringBuilder();

for (int i = 0; i < ppt.Slides.Count;i++ ) { for (int j = 0; j < ppt.Slides[i].Shapes.Count;j++ ) { if (ppt.Slides[i].Shapes[j] is IAutoShape) { IAutoShape shape=ppt.Slides[i].Shapes[j] as IAutoShape; if (shape.TextFrame != null) { foreach (TextParagraph tp in shape.TextFrame.Paragraphs) { sb.Append(tp.Text + Environment.NewLine); } } } } }

6. 問(wèn)：如何用圖片填充形狀？

答：請(qǐng)使用PictureShape的Url屬性。全部代碼：

Presentation ppt = new Presentation();

IAutoShape shape = (IAutoShape)ppt.Slides[0].Shapes.AppendShape(ShapeType.DoubleWave, new RectangleF(100, 100, 400, 200));
string picUrl = @"C:\Users\Administrator\Desktop\image.jpg";
shape.Fill.FillType = FillFormatType.Picture;
shape.Fill.PictureFill.Picture.Url = picUrl;
shape.Fill.PictureFill.FillType = PictureFillType.Stretch;
shape.ShapeStyle.LineColor.Color = Color.Transparent;
ppt.SaveToFile("shape.pptx", FileFormat.Pptx2010);