C# WinFormPDF和Word转换工具

C# WinFormPDF和Word转换工具

using System;
using System.IO;
using System.Windows.Forms;
using iTextSharp.text;
using iTextSharp.text.pdf;
using iTextSharp.text.pdf.draw;
using DocumentFormat.OpenXml;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Wordprocessing;
using A = DocumentFormat.OpenXml.Drawing;
using DW = DocumentFormat.OpenXml.Drawing.Wordprocessing;
using PIC = DocumentFormat.OpenXml.Drawing.Pictures;
using static System.Net.Mime.MediaTypeNames;
using static System.Windows.Forms.VisualStyles.VisualStyleElement.ProgressBar;
using static System.Windows.Forms.VisualStyles.VisualStyleElement.Tab;
using System.Drawing.Printing;
using System.Drawing;
using System.Xml.Linq;

namespace PdfWordConverter
{
    public partial class MainForm : Form
    {
        // 添加对以下NuGet包的引用：
        // 1. iTextSharp (5.5.13.3)
        // 2. DocumentFormat.OpenXml (2.20.0)
        // 3. System.Drawing.Common (6.0.0)

        private Label lblTitle;
        private GroupBox groupBoxPdfToWord;
        private GroupBox groupBoxWordToPdf;
        private TextBox txtPdfPath;
        private TextBox txtWordPath;
        private Button btnBrowsePdf;
        private Button btnBrowseWord;
        private Button btnPdfToWord;
        private Button btnWordToPdf;
        private ProgressBar progressBar;
        private Label lblStatus;
        private RichTextBox txtPreview;

        public MainForm()
        {
            this.Text = "PDF ↔ Word 转换器";
            this.Size = new System.Drawing.Size(900, 600);
            this.StartPosition = FormStartPosition.CenterScreen;
            this.BackColor = System.Drawing.Color.FromArgb(240, 240, 240);
            InitializeComponents();
        }

        private void InitializeComponents()
        {
            // 标题
            lblTitle = new Label
            {
                Text = "📄 PDF ↔ Word 文档转换器",
                Font = new System.Drawing.Font("微软雅黑", 20, System.Drawing.FontStyle.Bold),
                ForeColor = System.Drawing.Color.FromArgb(0, 120, 215),
                AutoSize = true,
                Location = new System.Drawing.Point(280, 20)
            };
            this.Controls.Add(lblTitle);

            // PDF转Word区域
            groupBoxPdfToWord = new GroupBox
            {
                Text = " PDF 转 Word ",
                Font = new System.Drawing.Font("微软雅黑", 12, System.Drawing.FontStyle.Bold),
                ForeColor = System.Drawing.Color.FromArgb(0, 100, 200),
                Location = new System.Drawing.Point(30, 70),
                Size = new System.Drawing.Size(400, 200),
                BackColor = System.Drawing.Color.White
            };

            txtPdfPath = new TextBox
            {
                Location = new System.Drawing.Point(20, 40),
                Size = new System.Drawing.Size(280, 25),
                Font = new System.Drawing.Font("微软雅黑", 10),
                ReadOnly = true,
                BackColor = System.Drawing.Color.FromArgb(245, 245, 245)
            };

            btnBrowsePdf = new Button
            {
                Text = "浏览...",
                Location = new System.Drawing.Point(310, 38),
                Size = new System.Drawing.Size(70, 28),
                Font = new System.Drawing.Font("微软雅黑", 9),
                BackColor = System.Drawing.Color.FromArgb(0, 120, 215),
                ForeColor = System.Drawing.Color.White,
                FlatStyle = FlatStyle.Flat
            };
            btnBrowsePdf.Click += BtnBrowsePdf_Click;

            btnPdfToWord = new Button
            {
                Text = "开始转换 → Word",
                Location = new System.Drawing.Point(20, 90),
                Size = new System.Drawing.Size(360, 50),
                Font = new System.Drawing.Font("微软雅黑", 12, System.Drawing.FontStyle.Bold),
                BackColor = System.Drawing.Color.FromArgb(76, 175, 80),
                ForeColor = System.Drawing.Color.White,
                FlatStyle = FlatStyle.Flat,
                Cursor = Cursors.Hand
            };
            btnPdfToWord.Click += BtnPdfToWord_Click;

            groupBoxPdfToWord.Controls.AddRange(new System.Windows.Forms.Control[] { txtPdfPath, btnBrowsePdf, btnPdfToWord });
            this.Controls.Add(groupBoxPdfToWord);

            // Word转PDF区域
            groupBoxWordToPdf = new GroupBox
            {
                Text = " Word 转 PDF ",
                Font = new System.Drawing.Font("微软雅黑", 12, System.Drawing.FontStyle.Bold),
                ForeColor = System.Drawing.Color.FromArgb(200, 80, 0),
                Location = new System.Drawing.Point(460, 70),
                Size = new System.Drawing.Size(400, 200),
                BackColor = System.Drawing.Color.White
            };

            txtWordPath = new TextBox
            {
                Location = new System.Drawing.Point(20, 40),
                Size = new System.Drawing.Size(280, 25),
                Font = new System.Drawing.Font("微软雅黑", 10),
                ReadOnly = true,
                BackColor = System.Drawing.Color.FromArgb(245, 245, 245)
            };

            btnBrowseWord = new Button
            {
                Text = "浏览...",
                Location = new System.Drawing.Point(310, 38),
                Size = new System.Drawing.Size(70, 28),
                Font = new System.Drawing.Font("微软雅黑", 9),
                BackColor = System.Drawing.Color.FromArgb(0, 120, 215),
                ForeColor = System.Drawing.Color.White,
                FlatStyle = FlatStyle.Flat
            };
            btnBrowseWord.Click += BtnBrowseWord_Click;

            btnWordToPdf = new Button
            {
                Text = "开始转换 → PDF",
                Location = new System.Drawing.Point(20, 90),
                Size = new System.Drawing.Size(360, 50),
                Font = new System.Drawing.Font("微软雅黑", 12, System.Drawing.FontStyle.Bold),
                BackColor = System.Drawing.Color.FromArgb(244, 67, 54),
                ForeColor = System.Drawing.Color.White,
                FlatStyle = FlatStyle.Flat,
                Cursor = Cursors.Hand
            };
            btnWordToPdf.Click += BtnWordToPdf_Click;

            groupBoxWordToPdf.Controls.AddRange(new System.Windows.Forms.Control[] { txtWordPath, btnBrowseWord, btnWordToPdf });
            this.Controls.Add(groupBoxWordToPdf);

            // 进度条
            progressBar = new ProgressBar
            {
                Location = new System.Drawing.Point(30, 290),
                Size = new System.Drawing.Size(830, 25),
                Style = ProgressBarStyle.Continuous,
                ForeColor = System.Drawing.Color.FromArgb(0, 150, 255)
            };
            this.Controls.Add(progressBar);

            // 状态标签
            lblStatus = new Label
            {
                Text = "就绪",
                Location = new System.Drawing.Point(30, 320),
                Size = new System.Drawing.Size(830, 25),
                Font = new System.Drawing.Font("微软雅黑", 10),
                ForeColor = System.Drawing.Color.Gray
            };
            this.Controls.Add(lblStatus);

            // 预览区域
            var lblPreview = new Label
            {
                Text = "📋 内容预览：",
                Location = new System.Drawing.Point(30, 350),
                Size = new System.Drawing.Size(200, 25),
                Font = new System.Drawing.Font("微软雅黑", 11, System.Drawing.FontStyle.Bold)
            };
            this.Controls.Add(lblPreview);

            txtPreview = new RichTextBox
            {
                Location = new System.Drawing.Point(30, 380),
                Size = new System.Drawing.Size(830, 160),
                Font = new System.Drawing.Font("Consolas", 10),
                BackColor = System.Drawing.Color.FromArgb(250, 250, 250),
                BorderStyle = BorderStyle.FixedSingle,
                ReadOnly = true
            };
            this.Controls.Add(txtPreview);
        }

        // PDF转Word功能
        private void BtnPdfToWord_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(txtPdfPath.Text) || !File.Exists(txtPdfPath.Text))
            {
                MessageBox.Show("请先选择有效的PDF文件！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return;
            }

            SaveFileDialog saveDialog = new SaveFileDialog
            {
                Filter = "Word文档|*.docx",
                FileName = Path.GetFileNameWithoutExtension(txtPdfPath.Text) + "_converted.docx",
                Title = "保存Word文档"
            };

            if (saveDialog.ShowDialog() == DialogResult.OK)
            {
                try
                {
                    SetStatus("正在转换 PDF 到 Word...", true);
                    ConvertPdfToWord(txtPdfPath.Text, saveDialog.FileName);
                    SetStatus($"转换完成！已保存到: {saveDialog.FileName}", false);
                    MessageBox.Show("PDF转Word转换成功！", "成功", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
                catch (Exception ex)
                {
                    SetStatus("转换失败", false);
                    MessageBox.Show($"转换失败：{ex.Message}", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }

        private void ConvertPdfToWord(string pdfPath, string wordPath)
        {
            progressBar.Value = 10;

            // 提取PDF文本
            string text = ExtractTextFromPdf(pdfPath);
            progressBar.Value = 50;

            // 创建Word文档
            using (WordprocessingDocument doc = WordprocessingDocument.Create(wordPath, WordprocessingDocumentType.Document))
            {
                MainDocumentPart mainPart = doc.AddMainDocumentPart();
                mainPart.Document = new DocumentFormat.OpenXml.Wordprocessing.Document();
                DocumentFormat.OpenXml.Wordprocessing.Body body = new DocumentFormat.OpenXml.Wordprocessing.Body();

                // 添加标题
                DocumentFormat.OpenXml.Wordprocessing.Paragraph titlePara = new DocumentFormat.OpenXml.Wordprocessing.Paragraph(
                    new Run
                    (
                        new DocumentFormat.OpenXml.Wordprocessing.Text("转换自: " + Path.GetFileName(pdfPath))
                        {
                            Space = SpaceProcessingModeValues.Preserve
                        }
                    )
                );
                titlePara.ParagraphProperties = new ParagraphProperties(
                    new ParagraphStyleId { Val = "Title" },
                    new Justification { Val = JustificationValues.Center }
                );
                body.Append(titlePara);

                // 添加分隔线
                body.Append(new DocumentFormat.OpenXml.Wordprocessing.Paragraph(new Run(new Break { Type = BreakValues.Page })));

                // 处理文本内容
                string[] lines = text.Split(new[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
                progressBar.Value = 70;

                foreach (string line in lines)
                {
                    if (!string.IsNullOrWhiteSpace(line))
                    {
                        DocumentFormat.OpenXml.Wordprocessing.Paragraph para = new DocumentFormat.OpenXml.Wordprocessing.Paragraph();
                        Run run = new Run();

                        // 处理可能的标题（短行且没有标点）
                        if (line.Length < 50 && !line.Contains(".") && !line.Contains("。"))
                        {
                            run.Append(new RunProperties(
                                new Bold(),
                                new FontSize { Val = "28" },
                                new DocumentFormat.OpenXml.Wordprocessing.Color { Val = "2E74B5" }
                            ));
                        }

                        run.Append(new DocumentFormat.OpenXml.Wordprocessing.Text(line) { Space = SpaceProcessingModeValues.Preserve });
                        para.Append(run);
                        body.Append(para);
                    }
                }

                // 添加页面设置
                SectionProperties sectionProps = new SectionProperties(
                    new DocumentFormat.OpenXml.Wordprocessing.PageSize { Width = 12240, Height = 15840 }, // Letter size
                    new PageMargin { Top = 1440, Right = 1440, Bottom = 1440, Left = 1440 }
                );
                body.Append(sectionProps);

                mainPart.Document.Append(body);
                mainPart.Document.Save();
            }

            progressBar.Value = 100;

            // 显示预览
            txtPreview.Text = text.Length > 2000 ? text.Substring(0, 2000) + "...\n\n[内容已截断，完整内容请查看生成的Word文件]" : text;
        }

        private string ExtractTextFromPdf(string pdfPath)
        {
            StringWriter output = new StringWriter();

            PdfReader reader = new PdfReader(pdfPath);

            for (int i = 1; i <= reader.NumberOfPages; i++)
            {
                //string text = PdfTextExtractor.GetTextFromPage(reader, i);
                //output.WriteLine(text);
                //output.WriteLine();
            }


            return output.ToString();
        }

        // Word转PDF功能
        private void BtnWordToPdf_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(txtWordPath.Text) || !File.Exists(txtWordPath.Text))
            {
                MessageBox.Show("请先选择有效的Word文件！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return;
            }

            SaveFileDialog saveDialog = new SaveFileDialog
            {
                Filter = "PDF文档|*.pdf",
                FileName = Path.GetFileNameWithoutExtension(txtWordPath.Text) + "_converted.pdf",
                Title = "保存PDF文档"
            };

            if (saveDialog.ShowDialog() == DialogResult.OK)
            {
                try
                {
                    SetStatus("正在转换 Word 到 PDF...", true);
                    ConvertWordToPdf(txtWordPath.Text, saveDialog.FileName);
                    SetStatus($"转换完成！已保存到: {saveDialog.FileName}", false);
                    MessageBox.Show("Word转PDF转换成功！", "成功", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
                catch (Exception ex)
                {
                    SetStatus("转换失败", false);
                    MessageBox.Show($"转换失败：{ex.Message}", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }

        private void ConvertWordToPdf(string wordPath, string pdfPath)
        {
            progressBar.Value = 20;

            // 读取Word内容
            string documentText = "";
            using (WordprocessingDocument doc = WordprocessingDocument.Open(wordPath, false))
            {
                DocumentFormat.OpenXml.Wordprocessing.Body body = doc.MainDocumentPart.Document.Body;
                documentText = body.InnerText;

                // 创建PDF
                using (FileStream fs = new FileStream(pdfPath, FileMode.Create, FileAccess.Write, FileShare.None))
                {
                    iTextSharp.text.Document pdfDoc = new iTextSharp.text.Document(iTextSharp.text.PageSize.A4, 50, 50, 50, 50);
                    PdfWriter writer = PdfWriter.GetInstance(pdfDoc, fs);
                    pdfDoc.Open();

                    progressBar.Value = 50;

                    // 添加中文字体支持
                    BaseFont baseFont = BaseFont.CreateFont("c:\\windows\\fonts\\simhei.ttf", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
                    iTextSharp.text.Font chineseFont = new iTextSharp.text.Font(baseFont, 12);
                    iTextSharp.text.Font titleFont = new iTextSharp.text.Font(baseFont, 18, iTextSharp.text.Font.BOLD);

                    // 添加标题
                    iTextSharp.text.Paragraph title = new iTextSharp.text.Paragraph("转换自: " + Path.GetFileName(wordPath), titleFont);
                    title.Alignment = Element.ALIGN_CENTER;
                    title.SpacingAfter = 20;
                    pdfDoc.Add(title);

                    // 添加分隔线
                    pdfDoc.Add(new iTextSharp.text.Chunk(new LineSeparator()));
                    pdfDoc.Add(new iTextSharp.text.Paragraph(" "));

                    progressBar.Value = 70;

                    // 处理段落
                    foreach (var para in body.Elements<DocumentFormat.OpenXml.Wordprocessing.Paragraph>())
                    {
                        string text = para.InnerText.Trim();
                        if (!string.IsNullOrEmpty(text))
                        {
                            // 检查是否是标题样式
                            bool isTitle = false;
                            var pPr = para.ParagraphProperties;
                            if (pPr?.ParagraphStyleId != null)
                            {
                                string styleId = pPr.ParagraphStyleId.Val;
                                isTitle = styleId != null && (styleId.Contains("Title") || styleId.Contains("Heading"));
                            }

                            iTextSharp.text.Font font = isTitle ?
                                new iTextSharp.text.Font(baseFont, 14, iTextSharp.text.Font.BOLD) : chineseFont;

                            iTextSharp.text.Paragraph pdfPara = new iTextSharp.text.Paragraph(text, font);

                            // 处理对齐方式
                            if (pPr?.Justification != null)
                            {
                                string justVal = pPr.Justification.Val;
                                if (justVal == "center")
                                    pdfPara.Alignment = Element.ALIGN_CENTER;
                                else if (justVal == "right")
                                    pdfPara.Alignment = Element.ALIGN_RIGHT;
                            }

                            pdfPara.SpacingAfter = 10;
                            pdfDoc.Add(pdfPara);
                        }
                    }

                    pdfDoc.Close();
                }
            }

            progressBar.Value = 100;

            // 显示预览
            txtPreview.Text = documentText.Length > 2000 ?
                documentText.Substring(0, 2000) + "...\n\n[内容已截断，完整内容请查看生成的PDF文件]" : documentText;
        }

        // 浏览按钮事件
        private void BtnBrowsePdf_Click(object sender, EventArgs e)
        {
            OpenFileDialog openDialog = new OpenFileDialog
            {
                Filter = "PDF文件|*.pdf",
                Title = "选择PDF文件",
                CheckFileExists = true
            };

            if (openDialog.ShowDialog() == DialogResult.OK)
            {
                txtPdfPath.Text = openDialog.FileName;
                lblStatus.Text = $"已选择PDF文件: {Path.GetFileName(openDialog.FileName)}";

                // 预览PDF内容
                try
                {
                    string preview = ExtractTextFromPdf(openDialog.FileName);
                    txtPreview.Text = preview.Length > 1500 ? preview.Substring(0, 1500) + "..." : preview;
                }
                catch { }
            }
        }

        private void BtnBrowseWord_Click(object sender, EventArgs e)
        {
            OpenFileDialog openDialog = new OpenFileDialog
            {
                Filter = "Word文档|*.docx|Word 97-2003|*.doc",
                Title = "选择Word文件",
                CheckFileExists = true
            };

            if (openDialog.ShowDialog() == DialogResult.OK)
            {
                txtWordPath.Text = openDialog.FileName;
                lblStatus.Text = $"已选择Word文件: {Path.GetFileName(openDialog.FileName)}";

                // 预览Word内容
                try
                {
                    using (WordprocessingDocument doc = WordprocessingDocument.Open(openDialog.FileName, false))
                    {
                        string text = doc.MainDocumentPart.Document.Body.InnerText;
                        txtPreview.Text = text.Length > 1500 ? text.Substring(0, 1500) + "..." : text;
                    }
                }
                catch { }
            }
        }

        private void SetStatus(string message, bool isProcessing)
        {
            lblStatus.Text = message;
            lblStatus.ForeColor = isProcessing ? System.Drawing.Color.Blue : System.Drawing.Color.Green;
            if (!isProcessing) progressBar.Value = 0;
            System.Windows.Forms.Application.DoEvents();
        }

    }
}

代码运行效果：

源代码地址：Gitee