//定义源文件和目标文件,绝对路径

   public static string source = @"E:\C#\C#编程语言详解.pdf";

    //2014-6-10 Training

            //拷贝大文件，分块拷贝

            AddBigFile(source);

    /// <summary>

        /// 拷贝大文件

        /// </summary>

        /// <param name="source">原绝对路径</param>

        private static void AddBigFile(string source)

        {

            int i = ;

            using (FileStream fsRead = new FileStream(source, FileMode.Open))

            {

                byte[] byts = new byte[ *  * ];

                while (true)

                {

                    int r = fsRead.Read(byts, , byts.Length);

                    if (r <= )

                    {

                        Console.WriteLine("----End----");

                        break;

                    }

                    DataBaseController.AddFiles(source, i, byts);

                    Console.WriteLine("FileName:" + source + "第 " + i + "个" + "大小：" + byts.Length);

                    i++;

                }

            }

        }

DataBaseController.AddFiles函数是拿到二进制数据，插入数据库操作：

 public static class DataBaseController

    {

       public static readonly string connstr = "Data Source=.;Initial Catalog=AddFile;Persist Security Info=True;User ID=sa;Password=sa";

       public static string Tosource = @"E:\C#\Copy123C#编程语言详解.pdf";

       public static void AddFiles(string FileName,int Code,byte[] Data)

       {

           string sql = @"insert into FileBlock(FileName, Code, Data) values(@FileName, @Code, @Data)";

           DateTime time = DateTime.Now;

           SqlParameter[] pars = {

                                new SqlParameter("@FileName",FileName),

                                new SqlParameter("@Code",Code),

                                new SqlParameter("@Data",Data)

                                };

           int count = SqlHelper.ExecuteNonQuery(connstr, CommandType.Text, sql, pars);

       }

       public static void GetFilesByName(string FileName)

       {

           string sql = @"select * from FileBlock where FileName = @FileName";

           DateTime time = DateTime.Now;

           SqlParameter[] pars = {

                                new SqlParameter("@FileName",FileName),

                                };

           List<FileBlock> list = new List<FileBlock>();

           using (SqlDataReader reader = SqlHelper.ExecuteReader(connstr, CommandType.Text, sql, pars))

           {

               list = Application.Data2Objects<FileBlock>(reader);

           }

           //循环查出文件的多个块，拼接写在一个文件中

           FileStream fs = new FileStream(Tosource,FileMode.Create);

           foreach (var item in list)

           {

               fs.Write(item.Data,,item.Data.Length);

           }

           //byte[] data = new byte[fs.Length];

           //fs.Read(data,0,fs.Length);

           //fs.Seek(0,SeekOrigin.Begin);

          // return data;

       }

    }

   public class FileBlock

   {

       public int ID { get; set; }

       public string  FileName { get; set; }

       public int Code { get; set; }

       public byte[] Data { get; set; }

   }