轉：Asp.net 備份、還原Ms SQLServer及壓縮Access資料庫

 原文地址：http://www.opent.cn/article.asp?id=212

/**********************************************************************************
 *
 * 功能說明:備份和恢複SQL Server資料庫
 * 作者: 劉功勳;
 * 版本:V0.1(C#2.0);時間:2007-1-1
 * 當使用SQL Server時,請引用 COM組件中的,SQLDMO.dll組件
 * 當使用Access中,請瀏覽添加引用以下兩個dll
 *          引用C:\Program Files\Common Files\System\ado\msadox.dll,該DLL包含ADOX命名空間
 *          引用C:\Program Files\Common Files\System\ado\msjro.dll,該DLL包含JRO命名空間
 * *******************************************************************************/
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
using ADOX;//該命名空間包含建立ACCESS的類(方法)--解決方案 ==> 引用 ==> 添加引用 ==> 遊覽找到.dll
using JRO;//該命名空間包含壓縮ACCESS的類(方法)

namespace EC
{
    /// <summary>
    /// 資料庫恢複和備份
    /// </summary>
    public class SqlBackObject
    {
        public SqlBackObject()
        {
            //
            // TODO: 在此處添加建構函式邏輯
            //
        }

        #region SQLDatabase Backup
       /// <summary>
        /// SQLDatabase Backup
       /// </summary>
       /// <param name="ServerIP">SQL伺服器IP或(Localhost)</param>
       /// <param name="LoginName">資料庫登入名稱</param>
       /// <param name="LoginPass">資料庫登入密碼</param>
       /// <param name="DBName">資料庫名</param>
       /// <param name="BackPath">備份到的路徑</param>
        public static void SQLBACK(string ServerIP,string LoginName,string LoginPass,string DBName,string BackPath)
        {
            SQLDMO.Backup oBackup = new SQLDMO.BackupClass();
            SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass();
            try
            {
                oSQLServer.LoginSecure = false;
                oSQLServer.Connect(ServerIP, LoginName, LoginPass);
                oBackup.Database = DBName;
                oBackup.Files = BackPath;
                oBackup.BackupSetName = DBName;
                oBackup.BackupSetDescription = "Database Backup";
                oBackup.Initialize = true;
                oBackup.SQLBackup(oSQLServer);

            }
            catch (Exception e)
            {
                throw new Exception(e.ToString());
            }
            finally
            {
                oSQLServer.DisConnect();
            }
        }
        #endregion

        #region SQL恢複資料庫
        /// <summary>
        /// SQL恢複資料庫
        /// </summary>
        /// <param name="ServerIP">SQL伺服器IP或(Localhost)</param>
        /// <param name="LoginName">資料庫登入名稱</param>
        /// <param name="LoginPass">資料庫登入密碼</param>
        /// <param name="DBName">要還原的資料庫名</param>
        /// <param name="BackPath">Database Backup的路徑</param>

        public static void SQLDbRestore(string ServerIP,string LoginName,string LoginPass,string DBName,string BackPath)
        {
          
            SQLDMO.Restore orestore = new SQLDMO.RestoreClass();
            SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass();
            try
            {
                oSQLServer.LoginSecure = false;
                oSQLServer.Connect(ServerIP, LoginName, LoginPass);
                orestore.Action = SQLDMO.SQLDMO_RESTORE_TYPE.SQLDMORestore_Database;
                orestore.Database = DBName;
                orestore.Files = BackPath;
                orestore.FileNumber = 1;
                orestore.ReplaceDatabase = true;
                orestore.SQLRestore(oSQLServer);

            }
            catch (Exception e)
            {
                throw new Exception(e.ToString());
            }
            finally
            {
                oSQLServer.DisConnect();
            }
        }

        #endregion

        #region 根據指定的檔案名稱建立Access資料庫
        /// <summary>
        /// 根據指定的檔案名稱建立資料
        /// </summary>
        /// <param name="DBPath">絕對路徑+檔案名稱</param>
        public static void CreateAccess(string DBPath)
        {
            if (File.Exists(DBPath))//檢查資料庫是否已存在
            {
                throw new Exception("目標資料庫已存在,無法建立");
            }          
            DBPath = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+DBPath;
            //建立一個CatalogClass對象執行個體
            ADOX.CatalogClass cat = new ADOX.CatalogClass();
            //使用CatalogClass對象的Create方法建立ACCESS資料庫
            cat.Create(DBPath);

        }
        #endregion

        #region 壓縮Access資料庫
        /// <summary>
        /// 壓縮Access資料庫
        /// </summary>
        /// <param name="DBPath">資料庫絕對路徑</param>
        public static void CompactAccess(string DBPath)
        {
            if (!File.Exists(DBPath))
            {
                throw new Exception("目標資料庫不存在,無法壓縮");
            }
          
            //聲明臨時資料庫名稱
            string temp = DateTime.Now.Year.ToString();
            temp += DateTime.Now.Month.ToString();
            temp += DateTime.Now.Day.ToString();
            temp += DateTime.Now.Hour.ToString();
            temp += DateTime.Now.Minute.ToString();
            temp += DateTime.Now.Second.ToString() + ".bak";
            temp = DBPath.Substring(0, DBPath.LastIndexOf("\\") + 1) + temp;
            //定義臨時資料庫的連接字串
            string temp2 = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+temp;
            //定義目標資料庫的連接字串
            string DBPath2 = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+DBPath;
            //建立一個JetEngineClass對象的執行個體
            JRO.JetEngineClass jt = new JRO.JetEngineClass();
            //使用JetEngineClass對象的CompactDatabase方法壓縮修複資料庫
            jt.CompactDatabase(DBPath2, temp2);
            //拷貝臨時資料庫到目標資料庫(覆蓋)
            File.Copy(temp, DBPath, true);
            //最後刪除臨時資料庫
            File.Delete(temp);
        }
        #endregion

        #region 備份Access資料庫
        /// <summary>
        /// 備份Access資料庫
        /// </summary>
        /// <param name="srcPath">要備份的資料庫絕對路徑</param>
        /// <param name="aimPath">備份到的資料庫絕對路徑</param>
        /// <returns></returns>
        public static void Backup(string srcPath,string aimPath)
        {
           
            if (!File.Exists(srcPath))
            {
                throw new Exception("來源資料庫不存在,無法備份");
            }
            try
            {
                File.Copy(srcPath,aimPath,true);
            }
            catch(IOException ixp)
            {
                throw new Exception(ixp.ToString());
            }
           
        }

        #endregion

        #region 還原Access資料庫
        /// <summary>
        /// 還原Access資料庫
        /// </summary>
        /// <param name="bakPath">備份的資料庫絕對路徑</param>
        /// <param name="dbPath">要還原的資料庫絕對路徑</param>
        public static void RecoverAccess(string bakPath,string dbPath)
        {          
            if (!File.Exists(bakPath))
            {
                throw new Exception("備份資料庫不存在,無法還原");
            }
            try
            {
                File.Copy(bakPath, dbPath, true);
            }
            catch (IOException ixp)
            {
                throw new Exception(ixp.ToString());
            }       
        }       
        #endregion
    }
}