asp.net 備份和恢復數據庫的方法示例

2024-07-10 13:27:09

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復制代碼代碼如下:

/**********************************************************************************

*
* 功能說明:備份和恢復SQL Server數據庫
* 作者: 劉功勛;
* 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;//該命名空間包含創建ACCESS的類(方法)--解決方案 ==> 引用 ==> 添加引用 ==> 游覽找到.dll
using JRO;//該命名空間包含壓縮ACCESS的類(方法)

namespace EC
{
    /// <summary>
    /// 數據庫恢復和備份
    /// </summary>
    public class SqlBackObject
    {
        public SqlBackObject()
        {
            //
            // TODO: 在此處添加構造函數邏輯
            //
        }

        #region SQL數據庫備份
       /// <summary>
        /// SQL數據庫備份
       /// </summary>
       /// <param>SQL服務器IP或(Localhost)</param>
       /// <param>數據庫登錄名</param>
       /// <param>數據庫登錄密碼</param>
       /// <param>數據庫名</param>
       /// <param>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 = "數據庫備份";
                oBackup.Initialize = true;
                oBackup.SQLBackup(oSQLServer);

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

        #region SQL恢復數據庫
        /// <summary>
        /// SQL恢復數據庫
        /// </summary>
        /// <param>SQL服務器IP或(Localhost)</param>
        /// <param>數據庫登錄名</param>
        /// <param>數據庫登錄密碼</param>
        /// <param>要還原的數據庫名</param>
        /// <param>數據庫備份的路徑</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 根據指定的文件名稱創建Access數據庫
        /// <summary>
        /// 根據指定的文件名稱創建數據
        /// </summary>
        /// <param>絕對路徑+文件名稱</param>
        public static void CreateAccess(string DBPath)
        {
            if (File.Exists(DBPath))//檢查數據庫是否已存在
            {
                throw new Exception("目標數據庫已存在,無法創建");
            }
            DBPath = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+DBPath;
            //創建一個CatalogClass對象實例
            ADOX.CatalogClass cat = new ADOX.CatalogClass();
            //使用CatalogClass對象的Create方法創建ACCESS數據庫
            cat.Create(DBPath);

}
#endregion

        #region 壓縮Access數據庫
        /// <summary>
        /// 壓縮Access數據庫
        /// </summary>
        /// <param>數據庫絕對路徑</param>
        public static void CompactAccess(string DBPath)
        {
            if (!File.Exists(DBPath))
            {
                throw new Exception("目標數據庫不存在,無法壓縮");
            }

            //聲明臨時數據庫名稱
            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("http://") + 1) + temp;
            //定義臨時數據庫的連接字符串
            string temp2 = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+temp;
            //定義目標數據庫的連接字符串
            string DBPath2 = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+DBPath;
            //創建一個JetEngineClass對象的實例
            JRO.JetEngineClass jt = new JRO.JetEngineClass();
            //使用JetEngineClass對象的CompactDatabase方法壓縮修復數據庫
            jt.CompactDatabase(DBPath2, temp2);
            //拷貝臨時數據庫到目標數據庫(覆蓋)
            File.Copy(temp, DBPath, true);
            //最后刪除臨時數據庫
            File.Delete(temp);
        }
        #endregion

        #region 備份Access數據庫
        /// <summary>
        /// 備份Access數據庫
        /// </summary>
        /// <param>要備份的數據庫絕對路徑</param>
        /// <param>備份到的數據庫絕對路徑</param>
        /// <returns></returns>
        public static void Backup(string srcPath,string aimPath)
        {

            if (!File.Exists(srcPath))
            {
                throw new Exception("源數據庫不存在,無法備份");
            }
            try
            {
                File.Copy(srcPath,aimPath,true);
            }
            catch(IOException ixp)
            {
                throw new Exception(ixp.ToString());
            }

        }

#endregion

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