sqlserver 通过压缩bak文件实现从服务器还原数据库《数据差异数个小时》

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1、备份主服务器数据库并压缩

   public void DbBack(){var bakname = @"ChargeDB_" + DateTime.Now.ToString("yyyyMMdd") + ".bak";string filepath = @"D:\dbback\" + bakname;if (File.Exists(filepath)){File.Delete(filepath);}string sql = @"declare @date nvarchar(10)  
set @date = CONVERT(nvarchar(10),getdate(),112) 
declare @path nvarchar(250) 
set @path = 'D:\dbback\' 
declare @db_filename nvarchar(150)  
set @db_filename = @path + 'ChargeDB_'+@date+'.bak' 
backup database ChargeDB TO DISK=@db_filename  ";DataRepository.ExecuteCommand(sql);//压缩文件 供备份服务器下载var dbpath = @"D:\dbback\ChargeDB_" + DateTime.Now.ToString("yyyyMMdd") + ".bak";var zippath = @"D:\dbback\ChargeDB_" + DateTime.Now.ToString("yyyyMMdd") + ".zip";if (File.Exists(dbpath)){Console.WriteLine("存在数据备份文件");ZipUtility zip = new ZipUtility();zip.ZipFile(dbpath, zippath, 2, 2048);}}

2、从服务器解压缩并还原

        static void Main(string[] args){var zippath = @"C:\dbback";var zipname = @"ChargeDB_" + DateTime.Now.ToString("yyyyMMdd") + ".zip";var bakname = @"ChargeDB_" + DateTime.Now.ToString("yyyyMMdd") + ".bak";FileLoad(zipname, zippath);//
            ZipUtility zip = new ZipUtility();zip.UnZip(zippath+@"\"+ zipname, zippath);Console.WriteLine("UnZipOVER");RestoreDataBase("ChargeDB", zippath+@"\" + bakname);Console.WriteLine(" RestoreDataBaseOver");Console.Read();}/// <summary>/// 下载文件/// </summary>/// <param name="fileName">客户端保存的文件名</param>/// <param name="filePath">保存的文件夹路径</param>/// <returns></returns>public static void FileLoad(string fileName, string filePath){//判断保存的文件夹是否存在if (!Directory.Exists(filePath)){//不存在则创建
                Directory.CreateDirectory(filePath);}//System.Net 中的验证和下载方法WebClient client = new WebClient();client.Credentials = CredentialCache.DefaultCredentials;client.DownloadFile("https://chengxiangzhineng.com/dbsite/ChargeDB_20240605.zip", filePath + "\\" + fileName);Console.WriteLine("下载完成");}public static void RestoreDataBase(string dataBaseName, string dataBaseBackupFile){var CommandText = string.Format(@"USE [master]
ALTER DATABASE {0}
SET SINGLE_USER
WITH ROLLBACK IMMEDIATE;
restore database {0}  from DISK='{1}'  
WITH  REPLACE
ALTER DATABASE {0}
SET MULTI_USER;", dataBaseName, dataBaseBackupFile);DataRepository.ExecuteCommand(CommandText);}

3、帮助类

using ICSharpCode.SharpZipLib.Checksum;
using ICSharpCode.SharpZipLib.Zip;
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;namespace swapCommon
{public class ZipUtility{/// <summary>  /// 所有文件缓存  /// </summary>  List<string> files = new List<string>();/// <summary>  /// 所有空目录缓存  /// </summary>  List<string> paths = new List<string>();/// <summary>  /// 压缩单个文件  /// </summary>  /// <param name="fileToZip">要压缩的文件</param>  /// <param name="zipedFile">压缩后的文件全名</param>  /// <param name="compressionLevel">压缩程度，范围0-9，数值越大，压缩程序越高</param>  /// <param name="blockSize">分块大小</param>  public void ZipFile(string fileToZip, string zipedFile, int compressionLevel, int blockSize){if (!System.IO.File.Exists(fileToZip))//如果文件没有找到，则报错  
            {throw new FileNotFoundException("The specified file " + fileToZip + " could not be found. Zipping aborderd");}FileStream streamToZip = new FileStream(fileToZip, FileMode.Open, FileAccess.Read);FileStream zipFile = File.Create(zipedFile);ZipOutputStream zipStream = new ZipOutputStream(zipFile);ZipEntry zipEntry = new ZipEntry(fileToZip);zipStream.PutNextEntry(zipEntry);zipStream.SetLevel(compressionLevel);byte[] buffer = new byte[blockSize];int size = streamToZip.Read(buffer, 0, buffer.Length);zipStream.Write(buffer, 0, size);try{while (size < streamToZip.Length){int sizeRead = streamToZip.Read(buffer, 0, buffer.Length);zipStream.Write(buffer, 0, sizeRead);size += sizeRead;}}catch (Exception ex){GC.Collect();throw ex;}zipStream.Finish();zipStream.Close();streamToZip.Close();GC.Collect();}/// <summary>  /// 压缩目录（包括子目录及所有文件）  /// </summary>  /// <param name="rootPath">要压缩的根目录</param>  /// <param name="destinationPath">保存路径</param>  /// <param name="compressLevel">压缩程度，范围0-9，数值越大，压缩程序越高</param>  public void ZipFileFromDirectory(string rootPath, string destinationPath, int compressLevel){GetAllDirectories(rootPath);/* while (rootPath.LastIndexOf("\\") + 1 == rootPath.Length)//检查路径是否以"\"结尾 { rootPath = rootPath.Substring(0, rootPath.Length - 1);//如果是则去掉末尾的"\" } *///string rootMark = rootPath.Substring(0, rootPath.LastIndexOf("\\") + 1);//得到当前路径的位置，以备压缩时将所压缩内容转变成相对路径。  string rootMark = rootPath + "\\";//得到当前路径的位置，以备压缩时将所压缩内容转变成相对路径。  Crc32 crc = new Crc32();ZipOutputStream outPutStream = new ZipOutputStream(File.Create(destinationPath));outPutStream.SetLevel(compressLevel); // 0 - store only to 9 - means best compression  foreach (string file in files){FileStream fileStream = File.OpenRead(file);//打开压缩文件  byte[] buffer = new byte[fileStream.Length];fileStream.Read(buffer, 0, buffer.Length);ZipEntry entry = new ZipEntry(file.Replace(rootMark, string.Empty));entry.DateTime = DateTime.Now;entry.Size = fileStream.Length;fileStream.Close();crc.Reset();crc.Update(buffer);entry.Crc = crc.Value;outPutStream.PutNextEntry(entry);outPutStream.Write(buffer, 0, buffer.Length);}this.files.Clear();foreach (string emptyPath in paths){ZipEntry entry = new ZipEntry(emptyPath.Replace(rootMark, string.Empty) + "/");outPutStream.PutNextEntry(entry);}this.paths.Clear();outPutStream.Finish();outPutStream.Close();GC.Collect();}/// <summary>  /// 取得目录下所有文件及文件夹，分别存入files及paths  /// </summary>  /// <param name="rootPath">根目录</param>  private void GetAllDirectories(string rootPath){string[] subPaths = Directory.GetDirectories(rootPath);//得到所有子目录  foreach (string path in subPaths){GetAllDirectories(path);//对每一个字目录做与根目录相同的操作：即找到子目录并将当前目录的文件名存入List  
            }string[] files = Directory.GetFiles(rootPath);foreach (string file in files){this.files.Add(file);//将当前目录中的所有文件全名存入文件List  
            }if (subPaths.Length == files.Length && files.Length == 0)//如果是空目录  
            {this.paths.Add(rootPath);//记录空目录  
            }}/// <summary>  /// 解压缩文件(压缩文件中含有子目录)  /// </summary>  /// <param name="zipfilepath">待解压缩的文件路径</param>  /// <param name="unzippath">解压缩到指定目录</param>  /// <returns>解压后的文件列表</returns>  public List<string> UnZip(string zipfilepath, string unzippath){//解压出来的文件列表  List<string> unzipFiles = new List<string>();//检查输出目录是否以“\\”结尾  if (unzippath.EndsWith("\\") == false || unzippath.EndsWith(":\\") == false){unzippath += "\\";}ZipInputStream s = new ZipInputStream(File.OpenRead(zipfilepath));ZipEntry theEntry;while ((theEntry = s.GetNextEntry()) != null){string directoryName = Path.GetDirectoryName(unzippath);string fileName = Path.GetFileName(theEntry.Name);//生成解压目录【用户解压到硬盘根目录时，不需要创建】  if (!string.IsNullOrEmpty(directoryName)){Directory.CreateDirectory(directoryName);}if (fileName != String.Empty){//如果文件的压缩后大小为0那么说明这个文件是空的,因此不需要进行读出写入  if (theEntry.CompressedSize == 0)continue;//解压文件到指定的目录  directoryName = Path.GetDirectoryName(unzippath + fileName);//建立下面的目录和子目录  
                    Directory.CreateDirectory(directoryName);//记录导出的文件  unzipFiles.Add(unzippath + fileName);FileStream streamWriter = File.Create(unzippath + fileName);int size = 2048;byte[] data = new byte[2048];while (true){size = s.Read(data, 0, data.Length);if (size > 0){streamWriter.Write(data, 0, size);}else{break;}}streamWriter.Close();}}s.Close();GC.Collect();return unzipFiles;}public string GetZipFileExtention(string fileFullName){int index = fileFullName.LastIndexOf(".");if (index <= 0){throw new Exception("The source package file is not a compress file");}//extension stringstring ext = fileFullName.Substring(index);if (ext == ".rar" || ext == ".zip"){return ext;}else{throw new Exception("The source package file is not a compress file");}}}
}

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