此演示向您展示如何将文本水印和图像水印添加到 PowerPoint 文档。

Set text watermark

Text:
Font:
Font Size:	The font size must be a valid number. The font size must be a valid number.
Color:	The format of color value must be rrggbb.
Rotate:	e-iceblue
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Set image watermark

Image:	Click here to browse files CustomValidator
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如果这不是您想要的 Demo，您可以通过填写表格获取免费定制 Demo。

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package ppt;import com.spire.presentation.*;import com.spire.presentation.drawing.BackgroundType;import com.spire.presentation.drawing.FillFormatType;import com.spire.presentation.drawing.IImageData;import com.spire.presentation.drawing.PictureFillType;import javax.imageio.ImageIO;import java.awt.*;import java.awt.geom.Rectangle2D;import java.awt.image.BufferedImage;import java.io.File;public class WatermarkDemo{public void watermark(String filePath,String watermarkType,String text,String imageFile,String resultFilePath) throws Exception{Presentation presentation = new Presentation();presentation.loadFromFile(filePath);switch (watermarkType){case "TEXT":addTextWatermark(presentation,text);break;case "IMAGE":File file = new File(imageFile);BufferedImage bufferedImage = ImageIO.read(file);addImageWatermark(presentation,bufferedImage);break;}presentation.saveToFile(resultFilePath,FileFormat.PPTX_2013);}private void addTextWatermark(Presentation presentation,String text) throws Exception{int width= 400;int height= 300;Rectangle2D.Double rect = new Rectangle2D.Double((presentation.getSlideSize().getSize().getWidth() - width) / 2,(presentation.getSlideSize().getSize().getHeight() - height) / 2,width,height);for (int i = 0;i<presentation.getSlides().getCount();i++){IAutoShape shape = presentation.getSlides().get(i).getShapes().appendShape(ShapeType.RECTANGLE,rect);shape.getFill().setFillType(FillFormatType.NONE);shape.getShapeStyle().getLineColor().setColor(Color.white);shape.setRotation(-45);shape.getLocking().setSelectionProtection(true);shape.getLine().setFillType(FillFormatType.NONE);shape.getTextFrame().setText(text);PortionEx textRange = shape.getTextFrame().getTextRange();TextFont font = new TextFont("Arial Rounded MT Bold");textRange.setLatinFont(font);textRange.getFill().setFillType(FillFormatType.SOLID);textRange.getFill().getSolidColor().setColor(Color.RED);textRange.setFontHeight(22);}}private void addImageWatermark(Presentation presentation,BufferedImage bufferedImage) throws DocumentEditException{IImageData image = presentation.getImages().append(bufferedImage);for (int i = 0;i<presentation.getSlides().getCount();i++){ISlide slide = presentation.getSlides().get(i);slide.getSlideBackground().setType(BackgroundType.CUSTOM);slide.getSlideBackground().getFill().setFillType(FillFormatType.PICTURE);slide.getSlideBackground().getFill().getPictureFill().setFillType(PictureFillType.STRETCH);slide.getSlideBackground().getFill().getPictureFill().getPicture().setEmbedImage(image);}}}

using Spire.Presentation;using Spire.Presentation.Drawing;using System.Drawing;using System.Windows.Forms;namespace DemoOnlineCode{class AddWatermark{public void AddTextOrImageWatermarkDemo(string filePath,string format,string text,string imagePath,string resultFileName){Presentation presentation = new Presentation();presentation.LoadFromFile(filePath);switch (format){case "TEXT":AddTextWatermark(presentation,text,resultFileName);break;case "IMAGE":AddImageWatermark(presentation,imagePath,resultFileName);break;}}private static void AddTextWatermark(Presentation presentation,string text,string resultFileName){Form frm = new Form();Graphics gc = frm.CreateGraphics();SizeF size = gc.MeasureString(text,new Font("Lucida Sans Unicode",50));//Define a rectangle range RectangleF rect = new RectangleF((presentation.SlideSize.Size.Width - size.Width) / 2,(presentation.SlideSize.Size.Height - size.Height) / 2,size.Width,size.Height);foreach (ISlide slide in presentation.Slides){IAutoShape shape =slide.Shapes.AppendShape(ShapeType.Rectangle,rect);//Set the style of the shape shape.Fill.FillType = FillFormatType.None;shape.ShapeStyle.LineColor.Color = Color.White;shape.Rotation = -45;shape.Locking.SelectionProtection = true;shape.Line.FillType = FillFormatType.None;//Add text to the shape shape.TextFrame.Text = text;TextRange textRange = shape.TextFrame.TextRange;//Set the style of the text range textRange.Fill.FillType = FillFormatType.Solid;textRange.Fill.SolidColor.Color = Color.FromArgb(120,Color.HotPink);textRange.FontHeight = 50;}presentation.SaveToFile(resultFileName + ".pptx",FileFormat.Pptx2013);}private static void AddImageWatermark(Presentation presentation,string imageFile,string resultFileName){IImageData image = presentation.Images.Append(Image.FromFile(imageFile));foreach (ISlide slide in presentation.Slides){slide.SlideBackground.Type = BackgroundType.Custom;slide.SlideBackground.Fill.FillType = FillFormatType.Picture;slide.SlideBackground.Fill.PictureFill.FillType = PictureFillType.Stretch;slide.SlideBackground.Fill.PictureFill.Picture.EmbedImage = image;}presentation.SaveToFile(resultFileName + ".pptx",FileFormat.Pptx2013);}}}