C# 處理PPT水印（一）——添加水印效果（文字水印、圖片水印）

對文檔添加水印能夠有效聲明和保護文檔，是保護重要文件的方式之一。在PPT文檔中一樣也能夠設置水印，包括文本水印和圖片水印，本文將講述如何經過Spire.Presentation for .NET來對PPT添加水印，下載安裝Free Spire.Presentationfor .NET後，添加引用dll文件，參考下面的操做步驟，完成水印添加。

1.添加文本水印

步驟一：初始化Presentation類實例，並加載文檔

Presentation ppt = new Presentation();
ppt.LoadFromFile(@"C:\Users\Administrator\Desktop\sample.pptx", FileFormat.Pptx2010);

步驟二：初始化一個Font類實例，並實例化字體格式

Font stringFont = new Font("Arial", 90);
Size size = TextRenderer.MeasureText("內部資料", stringFont);

步驟三：繪製一個shape並指定大小、填充顏色、邊框顏色和旋轉角度

RectangleF rect = new RectangleF((ppt.SlideSize.Size.Width - size.Width) / 2, (ppt.SlideSize.Size.Height - size.Height) / 2, size.Width, size.Height);
IAutoShape shape = ppt.Slides[0].Shapes.AppendShape(Spire.Presentation.ShapeType.Rectangle, rect);
shape.Fill.FillType = FillFormatType.None;
shape.ShapeStyle.LineColor.Color = Color.White;
shape.Rotation = -45;

步驟四：設定形狀屬性爲保護屬性

shape.Locking.SelectionProtection = true;
shape.Line.FillType = FillFormatType.None;

步驟五：設置文本大小、顏色

shape.TextFrame.Text = "內部資料";
TextRange textRange = shape.TextFrame.TextRange;
textRange.Fill.FillType = Spire.Presentation.Drawing.FillFormatType.Solid;
textRange.Fill.SolidColor.Color = Color.FromArgb(120, Color.Gray);
textRange.FontHeight = 45;

步驟六：保存文檔

ppt.SaveToFile("TextWatermark.pptx", FileFormat.Pptx2010);

完成以上代碼步驟後，調試運行項目程序，生成文件（可在該項目文件中bin>Debug中查看），以下圖所示：

 

 

所有代碼：

using System;
using System.Text;
using Spire.Presentation;
using System.Drawing;
using Spire.Presentation.Drawing;
using System.Windows.Forms;

namespace InsertWatermark_PPT
{
    class Program
    {
        static void Main(string[] args)
        {
            //初始化一個Presentation類實例並加載文檔
            Presentation ppt = new Presentation();
            ppt.LoadFromFile(@"C:\Users\Administrator\Desktop\sample.pptx", FileFormat.Pptx2010);

            //初始化一個Font類字體實例並實例化字體格式
            Font stringFont = new Font("Arial", 90);
            Size size = TextRenderer.MeasureText("內部資料", stringFont);

            //繪製一個Shape並指定大小、填充顏色、邊框顏色和旋轉度
            RectangleF rect = new RectangleF((ppt.SlideSize.Size.Width - size.Width) / 2, (ppt.SlideSize.Size.Height - size.Height) / 2, size.Width, size.Height);
            IAutoShape shape = ppt.Slides[0].Shapes.AppendShape(Spire.Presentation.ShapeType.Rectangle, rect);
            shape.Fill.FillType = FillFormatType.None;
            shape.ShapeStyle.LineColor.Color = Color.White;
            shape.Rotation = -45;

            //設定形狀屬性爲保護屬性
            shape.Locking.SelectionProtection = true;
            shape.Line.FillType = FillFormatType.None;

            //設置文本大小、顏色
            shape.TextFrame.Text = "內部資料";
            TextRange textRange = shape.TextFrame.TextRange;
            textRange.Fill.FillType = Spire.Presentation.Drawing.FillFormatType.Solid;
            textRange.Fill.SolidColor.Color = Color.FromArgb(150, Color.LightBlue);
            textRange.FontHeight = 90;

            //保存文檔
            ppt.SaveToFile("TextWatermark.pptx", FileFormat.Pptx2010);
        }
    }

View full Code

 

2.添加圖片水印

步驟一：初始化一個Presentation類實例並加載文檔

Presentation ppt = new Presentation();
ppt.LoadFromFile(@"C:\Users\Administrator\Desktop\sample.pptx", FileFormat.Pptx2010);

步驟二: 爲第一張幻燈片設置背景圖片類型和樣式

ppt.Slides[0].SlideBackground.Type = Spire.Presentation.Drawing.BackgroundType.Custom;
ppt.Slides[0].SlideBackground.Fill.FillType = FillFormatType.Picture;
ppt.Slides[0].SlideBackground.Fill.PictureFill.FillType = PictureFillType.Stretch;

步驟三：加載圖片併爲第一張幻燈片設置水印

Image img = Image.FromFile(@"C:\Users\Administrator\Desktop\images\1.jpg");
IImageData image = ppt.Images.Append(img);
ppt.Slides[0].SlideBackground.Fill.PictureFill.Picture.EmbedImage = image;

步驟四：保存文檔

 ppt.SaveToFile("ImageWatermark1.pptx", FileFormat.Pptx2010);

 

所有代碼：

using System;
using System.Drawing;
using Spire.Presentation;
using Spire.Presentation.Drawing;

namespace ImageWatermark_PPT
{
    class Program
    {
        static void Main(string[] args)
        {
            //初始化一個Presentation類實例並加載文檔
            Presentation ppt = new Presentation();
            ppt.LoadFromFile(@"C:\Users\Administrator\Desktop\sample.pptx", FileFormat.Pptx2010);

            //爲第一張幻燈片設置背景圖片類型和樣式
            ppt.Slides[0].SlideBackground.Type = Spire.Presentation.Drawing.BackgroundType.Custom;
            ppt.Slides[0].SlideBackground.Fill.FillType = FillFormatType.Picture;
            ppt.Slides[0].SlideBackground.Fill.PictureFill.FillType = PictureFillType.Stretch;

            //加載圖片併爲第一張幻燈片設置水印效果
            Image img = Image.FromFile(@"C:\Users\Administrator\Desktop\images\1.jpg");
            IImageData image = ppt.Images.Append(img);
            ppt.Slides[0].SlideBackground.Fill.PictureFill.Picture.EmbedImage = image;

            //保存文檔
            ppt.SaveToFile("ImageWatermark1.pptx", FileFormat.Pptx2010);
        }
    }
}

View full Code

 

 

以上是對PPT添加水印的代碼操做，但願該方法能提供幫助，感謝閱讀！