在.Net中进行SQL Server数据库备份与还原操作实用类

#region 类说明

//-----------------------------------------------------------------------------

//

// 项目名称：***

// 文件名称：DBBakManager.cs

// 文件说明：对数据库备份文件进行管理。提供备份、还原、备份文件管理操作。

//

// 开始日期：2007年04月04日

// 开发人员：***

//

//-----------------------------------------------------------------------------

#endregion



using System;

using System.Collections.Generic;

using System.IO;

using System.Text;

using SQLDMO;       //添加引用C:Program FilesMicrosoft SQL Server80ToolsBinnSQLDMO.dll



namespace GSIM.StuManager

{

    /// <summary>

    /// 对SQL Server数据库备份文件进行管理。提供备份、还原、备份文件管理操作。

    /// </summary>

    public class DBBakManager

    {



        字段#region 字段



        private string _serverName;

        private string _userName;

        private string _password;

        private string _dbName;



        #endregion



        构造#region 构造



        /// <summary>

        /// 构造函数

        /// </summary>

        /// <param name="serverName">数据库服务器名

        /// <param name="userName">数据库用户名

        /// <param name="password">用户密码

        /// <param name="dbName">数据库名

        public DBBakManager(string serverName, string userName, string password,string dbName)

        {

            _serverName = serverName;

            _userName = userName;

            _password = password;

            _dbName = dbName;

        }



        #endregion



        方法#region 方法



        /// <summary>

        /// 备份数据库

        /// </summary>

        /// <param name="saveFileName">保存的备份文件路径(包括文件名,文件名格式为:"DBName(yyyyMMddHHmm).bak")

        /// <returns>操作成功返回true,否则返回false</returns>

        public bool BackUpDB(string saveFileName)

        {

            SQLDMO.SQLServer svr = new SQLDMO.SQLServerClass();

            try

            {

                svr.Connect(_serverName, _userName, _password);

                SQLDMO.Backup bak = new SQLDMO.BackupClass();

                bak.Action = SQLDMO.SQLDMO_BACKUP_TYPE.SQLDMOBackup_Database;

                bak.Initialize = true;

                bak.Database = _dbName;

                bak.Files = saveFileName;

                bak.SQLBackup(svr);

                return true;

            }

            catch (Exception err)

            {

                return false;

            }

            finally

            {

                svr.Close();

            }

        }



        /// <summary>

        /// 还原数据库备份

        /// </summary>

        /// <param name="fileName">还原的备份文件路径(包括文件名,文件名格式为:"DBName(yyyyMMddHHmm).bak")

        /// <returns>操作成功返回true,否则返回false</returns>

        public bool RestoreDB(string fileName)

        {

            SQLDMO.SQLServer svr = new SQLDMO.SQLServerClass();

            try

            {

                svr.Connect(_serverName, _userName, _password);

                //取得所有的进程列表

                SQLDMO.QueryResults qr = svr.EnumProcesses(-1);

                int iColPIDNum = -1;

                int iColDbName = -1;

                //找到和要恢复数据库相关的进程

                for (int i = 1; i <= qr.Columns; i++)

                {

                    string strName = qr.get_ColumnName(i);

                    if (strName.ToUpper().Trim() == "SPID")

                    {

                        iColPIDNum = i;

                    }

                    else if (strName.ToUpper().Trim() == "DBNAME")

                    {

                        iColDbName = i;

                    }

                    if (iColPIDNum != -1 && iColDbName != -1)

                        break;

                }

                //将相关进程关闭               

                for (int i = 1; i <= qr.Rows; i++)

                {

                    int lPID = qr.GetColumnLong(i, iColPIDNum);

                    string strDBName = qr.GetColumnString(i, iColDbName);

                    if (strDBName.ToUpper() == _dbName)

                        svr.KillProcess(lPID);

                }



                SQLDMO.Restore res = new SQLDMO.RestoreClass();



                res.Action = SQLDMO.SQLDMO_RESTORE_TYPE.SQLDMORestore_Database;

                res.Files = fileName;



                res.Database = _dbName;

                res.FileNumber = 1;



                res.ReplaceDatabase = true;

                res.SQLRestore(svr);



                return true;

            }

            catch (Exception err)

            {

                return false;

            }

            finally

            {

                svr.Close();

            }

        }



        /// <summary>

        /// 获得所有数据库备份文件信息,如:200704041120.

        /// </summary>

        /// <param name="filePath">保存备份文件的文件夹路径(不包括文件名)

        /// <returns>包含文件信息的字符串组</returns>

        public string[] GetAllDBBak(string filePath)

        {

            string[] DBBakInfo = Directory.GetFiles(filePath, "BMIS*");

            int start = DBBakInfo[0].IndexOf("(");

            int end = DBBakInfo[0].IndexOf(")");

            //除去多余部分,返回名字中的时间信息,如:200704041120.

            for (int i = 0; i < DBBakInfo.Length; i++)

            {

                DBBakInfo[i] = DBBakInfo[i].Substring(start + 1, end - start - 1);

            }

            return DBBakInfo;

        }



        /// <summary>

        /// 删除一个数据库备份文件

        /// </summary>

        /// <param name="fileName">删除的备份文件路径(包括文件名,文件名格式为:"DBName(yyyyMMddHHmm).bak")

        /// <returns>操作成功返回true,否则返回false</returns>

        public bool DeleteDBBak(string fileName)

        {

            if (File.Exists(fileName) == true)

            {

                File.Delete(fileName);

                return true;

            }

            else

            {

                return false;

            }



        }



        #endregion

    }

}

 

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