C#中PDF文档操作类

清疚 2021-06-26 16:06 547阅读 0赞

## PDFOperation.cs ##

using System.IO;
    using iTextSharp.text;
    using iTextSharp.text.pdf;
    
    namespace DotNet.Utilities
    {
        /// <summary>
        /// PDF文档操作类
        /// </summary>
        //------------------------------------调用--------------------------------------------
        //PDFOperation pdf = new PDFOperation();
        //pdf.Open(new FileStream(path, FileMode.Create));
        //pdf.SetBaseFont(@"C:\Windows\Fonts\SIMHEI.TTF");
        //pdf.AddParagraph("测试文档（生成时间：" + DateTime.Now + "）", 15, 1, 20, 0, 0);
        //pdf.Close();
        //-------------------------------------------------------------------------------------
        public class PDFOperation
        {
            #region 构造函数
            /// <summary>
            /// 构造函数
            /// </summary>
            public PDFOperation()
            {
                rect = PageSize.A4;
                document = new Document(rect);
            }
    
            /// <summary>
            /// 构造函数
            /// </summary>
            /// <param name="type">页面大小(如"A4")</param>
            public PDFOperation(string type)
            {
                SetPageSize(type);
                document = new Document(rect);
            }
    
            /// <summary>
            /// 构造函数
            /// </summary>
            /// <param name="type">页面大小(如"A4")</param>
            /// <param name="marginLeft">内容距左边框距离</param>
            /// <param name="marginRight">内容距右边框距离</param>
            /// <param name="marginTop">内容距上边框距离</param>
            /// <param name="marginBottom">内容距下边框距离</param>
            public PDFOperation(string type, float marginLeft, float marginRight, float marginTop, float marginBottom)
            {
                SetPageSize(type);
                document = new Document(rect, marginLeft, marginRight, marginTop, marginBottom);
            }
            #endregion
    
            #region 私有字段
            private Font font;
            private Rectangle rect;   //文档大小
            private Document document;//文档对象
            private BaseFont basefont;//字体
            #endregion
    
            #region 设置字体
            /// <summary>
            /// 设置字体
            /// </summary>
            public void SetBaseFont(string path)
            {
                basefont = BaseFont.CreateFont(path, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
            }
    
            /// <summary>
            /// 设置字体
            /// </summary>
            /// <param name="size">字体大小</param>
            public void SetFont(float size)
            {
                font = new Font(basefont, size);
            }
            #endregion
    
            #region 设置页面大小
            /// <summary>
            /// 设置页面大小
            /// </summary>
            /// <param name="type">页面大小(如"A4")</param>
            public void SetPageSize(string type)
            {
                switch (type.Trim())
                {
                    case "A4":
                        rect = PageSize.A4;
                        break;
                    case "A8":
                        rect = PageSize.A8;
                        break;
                }
            }
            #endregion
    
            #region 实例化文档
            /// <summary>
            /// 实例化文档
            /// </summary>
            /// <param name="os">文档相关信息（如路径，打开方式等）</param>
            public void GetInstance(Stream os)
            {
                PdfWriter.GetInstance(document, os);
            }
            #endregion
    
            #region 打开文档对象
            /// <summary>
            /// 打开文档对象
            /// </summary>
            /// <param name="os">文档相关信息（如路径，打开方式等）</param>
            public void Open(Stream os)
            {
                GetInstance(os);
                document.Open();
            }
            #endregion
    
            #region 关闭打开的文档
            /// <summary>
            /// 关闭打开的文档
            /// </summary>
            public void Close()
            {
                document.Close();
            }
            #endregion
    
            #region 添加段落
            /// <summary>
            /// 添加段落
            /// </summary>
            /// <param name="content">内容</param>
            /// <param name="fontsize">字体大小</param>
            public void AddParagraph(string content, float fontsize)
            {
                SetFont(fontsize);
                Paragraph pra = new Paragraph(content, font);
                document.Add(pra);
            }
    
            /// <summary>
            /// 添加段落
            /// </summary>
            /// <param name="content">内容</param>
            /// <param name="fontsize">字体大小</param>
            /// <param name="Alignment">对齐方式（1为居中，0为居左，2为居右）</param>
            /// <param name="SpacingAfter">段后空行数（0为默认值）</param>
            /// <param name="SpacingBefore">段前空行数（0为默认值）</param>
            /// <param name="MultipliedLeading">行间距（0为默认值）</param>
            public void AddParagraph(string content, float fontsize, int Alignment, float SpacingAfter, float SpacingBefore, float MultipliedLeading)
            {
                SetFont(fontsize);
                Paragraph pra = new Paragraph(content, font);
                pra.Alignment = Alignment;
                if (SpacingAfter != 0)
                {
                    pra.SpacingAfter = SpacingAfter;
                }
                if (SpacingBefore != 0)
                {
                    pra.SpacingBefore = SpacingBefore;
                }
                if (MultipliedLeading != 0)
                {
                    pra.MultipliedLeading = MultipliedLeading;
                }
                document.Add(pra);
            }
            #endregion
    
            #region 添加图片
            /// <summary>
            /// 添加图片
            /// </summary>
            /// <param name="path">图片路径</param>
            /// <param name="Alignment">对齐方式（1为居中，0为居左，2为居右）</param>
            /// <param name="newWidth">图片宽（0为默认值，如果宽度大于页宽将按比率缩放）</param>
            /// <param name="newHeight">图片高</param>
            public void AddImage(string path, int Alignment, float newWidth, float newHeight)
            {
                Image img = Image.GetInstance(path);
                img.Alignment = Alignment;
                if (newWidth != 0)
                {
                    img.ScaleAbsolute(newWidth, newHeight);
                }
                else
                {
                    if (img.Width > PageSize.A4.Width)
                    {
                        img.ScaleAbsolute(rect.Width, img.Width * img.Height / rect.Height);
                    }
                }
                document.Add(img);
            }
            #endregion
    
            #region 添加链接、点
            /// <summary>
            /// 添加链接
            /// </summary>
            /// <param name="Content">链接文字</param>
            /// <param name="FontSize">字体大小</param>
            /// <param name="Reference">链接地址</param>
            public void AddAnchorReference(string Content, float FontSize, string Reference)
            {
                SetFont(FontSize);
                Anchor auc = new Anchor(Content, font);
                auc.Reference = Reference;
                document.Add(auc);
            }
    
            /// <summary>
            /// 添加链接点
            /// </summary>
            /// <param name="Content">链接文字</param>
            /// <param name="FontSize">字体大小</param>
            /// <param name="Name">链接点名</param>
            public void AddAnchorName(string Content, float FontSize, string Name)
            {
                SetFont(FontSize);
                Anchor auc = new Anchor(Content, font);
                auc.Name = Name;
                document.Add(auc);
            }
            #endregion
        }
    }