C# Word文档添加水印

缺乏、安全感 2024-04-18 22:34 106阅读 0赞

在工作中遇到个需求，需要给Word文档添加水印搞了一天才搞出来，所以在此记录一下：

重点用到了E-iceblue官网下载到的：Spire.dll

using Spire.Doc;
    using Spire.Doc.Documents;
    using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Linq;
    using System.Text;
    using System.Threading;
    using System.Windows.Forms;
    
    namespace WayGo.GZ.Common
    {
        public class WordSetWaterMark
        {
            private string loadpath
            {
                get;
                set;
            }
            private string filetype
            {
                get;
                set;
            }
    
            /// <summary>
            ///  流程正文添加水印
            /// </summary>
            /// <param name="wordpath">加载的文档路径</param>
            /// <param name="waterword">添加水印文字</param>
            /// <returns></returns>
            public static bool WordSetWaterExecute(string wordpath, string waterword, string type)
            {
    
                try
                {
                    if (type == "doc")
                    {
                        //word 添加水印
                        Document doc = new Document();
                        doc.LoadFromFile(wordpath);
                        TextWatermark txtWatermark = new TextWatermark();
                        txtWatermark.Text = waterword;
                        txtWatermark.FontSize = 30;
                        txtWatermark.Layout = WatermarkLayout.Diagonal;
                        doc.Watermark = txtWatermark;
                        Thread newThread = new Thread(new ParameterizedThreadStart(saveFileName));
                        newThread.SetApartmentState(ApartmentState.STA);//设置这个参数，指示应用程序的COM线程模型 是 单线程单元
                        newThread.Start(doc);
                        return true;
                    }
                    else
                    {
                        WordSetWaterMark model = new WordSetWaterMark();
                        model.filetype = type;
                        model.loadpath = wordpath;
                        Thread newThread = new Thread(new ParameterizedThreadStart(saveFileName));
                        newThread.SetApartmentState(ApartmentState.STA);//设置这个参数，指示应用程序的COM线程模型 是 单线程单元
                        newThread.Start(model);
                        return true;
                    }
    
    
                }
                catch (Exception e)
                {
                    throw;
                }
            }
    
            //打开保存路径
            private static void saveFileName(object document)
            {
                Document doc = (Document)document;
                SaveFileDialog sfd = new SaveFileDialog();
    
                //设置文件类型 
                sfd.Filter = "(*.doc)|*.doc";
    
                //设置默认文件类型显示顺序 
                sfd.FilterIndex = 1;
    
                //保存对话框是否记忆上次打开的目录 
                sfd.RestoreDirectory = true;
                //点了保存按钮进入 
                if (sfd.ShowDialog() == DialogResult.OK)
                {
                    string localFilePath = sfd.FileName.ToString(); //获得文件路径 
    
                    //添加水印保存
                    doc.SaveToFile(localFilePath);
    
                }
            }
    
            //非doc 文件打开保存路径
            private static void saveFileName1(object word)
            {
                WordSetWaterMark model = (WordSetWaterMark)word;
    
                SaveFileDialog sfd = new SaveFileDialog();
    
                //设置文件类型 
                sfd.Filter = "(*." + model.filetype + ")|*." + model.filetype;
    
                //设置默认文件类型显示顺序 
                sfd.FilterIndex = 1;
    
                //保存对话框是否记忆上次打开的目录 
                sfd.RestoreDirectory = true;
                //点了保存按钮进入 
                if (sfd.ShowDialog() == DialogResult.OK)
                {
                    string localFilePath = sfd.FileName.ToString(); //获得文件路径               
    
                    FileStream RFile = new FileStream(model.loadpath, FileMode.Open, FileAccess.Read);
    
                    FileStream WFile = new FileStream(localFilePath, FileMode.Create, FileAccess.Write);
                    Byte[] buffer = new byte[RFile.Length];
                    while (true)
                    {
                        int r = RFile.Read(buffer, 0, buffer.Length);
                        if (r == 0)
                        {
                            break;
                        }
                        WFile.Write(buffer, 0, r);
                    }
                    RFile.Close();
                    WFile.Close();
                }
            }
    
        }
    }

测试：

string path="需要添加水印文件的绝对地址";
    string waterword ="我是水印";
    string type="doc";
    //调用
     WordSetWaterMark.WordSetWaterExecute(path, waterword , type);