c# 备份与还原SQL/ACCESS 数据库的代码

//使用前须先引用SQLDMO.dll ADOX.dll JRO.dll 等组件，无须独立安装
//如：C:Program FilesCommon FilesSystemadomsadox.dll
//如：C:Program FilesCommon FilesSystemadomsjro.dll
//如：C:Program FilesMicrosoft SQL Server80ToolsBinnSQLDMO.DLL

using System;
using System.IO;

/// <summary>
/// 数据库恢复和备份
/// </summary>
public class DataBak
{
    public DataBak()
    {
        //
        // TO

        //DO: 在此处添加构造函数逻辑
        //
    }

    #region sql数据库备份
    /// <summary>
    /// SQL数据库备份
    /// </summary>
    /// <param name="ServerIP">SQL服务器IP或(Localhost)</param>
    /// <param name="LoginName">数据库登录名</param>
    /// <param name="LoginPass">数据库登录密码</param>
    /// <param name="DBName">数据库名</param>
    /// <param name="BackPath">备份到的路径</param>
    public static bool BakSql(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.Action = SQLDMO.SQLDMO_BACKUP_TYPE.SQLDMOBackup_Database;
            oBackup.Database = DBName;
            oBackup.Files = BackPath;
            oBackup.BackupSetName = DBName;
            oBackup.BackupSetDescription = "数据库备份";
            oBackup.Initialize = true;
            oBackup.SQLBackup(oSQLServer);
            return true;
        }
        catch (Exception e)
        {
            return false;
            throw new Exception(e.ToString());
        }
        finally
        {
            oSQLServer.DisConnect();
        }
    }
    #endregion

    #region SQL恢复数据库
    /// <summary>
    /// SQL恢复数据库
    /// </summary>
    /// <param name="ServerIP">SQL服务器IP或(Localhost)</param>
    /// <param name="LoginName">数据库登录名</param>
    /// <param name="LoginPass">数据库登录密码</param>
    /// <param name="DBName">要还原的数据库名</param>
    // <param name="BackPath">数据库备份的路径</param>
    public static bool RecoverSql(string ServerIP, string LoginName, string LoginPass, string DBName, string BackPath)
    {

        SQLDMO.Restore orestore = new SQLDMO.RestoreClass();
        SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass();
        try
        {
            //杀死所有SQL进程
            SQLDMO.QueryResults qr = oSQLServer.EnumProcesses(-1);
            int iColPIDNum = -1;
            int iColDbName = -1;
            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;
            }

            for (int i = 1; i <= qr.Rows; i++)
            {
                int lPID = qr.GetColumnLong(i, iColPIDNum);
                string strDBName = qr.GetColumnString(i, iColDbName);
                if (strDBName.ToUpper() == DBName.ToUpper())
                    oSQLServer.KillProcess(lPID);
            }

            //执行还原工作
            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);
            return true;
        }
        catch (Exception e)
        {
            return false;
            throw new Exception(e.ToString());
        }
        finally
        {
            oSQLServer.DisConnect();
        }
    }
    #endregion

    #region 备份SQL数据库
    /// <summary>
    /// 备份SQL数据库
    /// </summary>
    /// <param name="databasename">要备份的数据源名称</param>
    /// <param name="backuptodatabase">备份到的数据库文件名称及路径</param>
    /// <returns></returns>
    public static bool BakSql(string databaseName, string bakPath)
    {
        try
        {
            //声明临时数据库名称
            string bakName = databaseName;

            bakName += DateTime.Now.Year.ToString();
            bakName += DateTime.Now.Month.ToString();
            bakName += DateTime.Now.Day.ToString();
            bakName += DateTime.Now.Hour.ToString();
            bakName += DateTime.Now.Minute.ToString();
            bakName += DateTime.Now.Second.ToString();
            bakName += ".bak";

            if (bakPath.LastIndexOf('') != bakPath.Length)
                bakPath += '';

            string sqlbak = "BACKUP DATABASE " + databaseName + " TO DISK = '" + bakPath + bakName + "' WITH INIT";

            if (Common.ExeSql(sqlbak) != 0)
                return true;
            else
                return false;
        }
        catch
        {
            return false;
        }
    }
    #endregion

    #region 还原SQL数据库

    /// <summary>
    /// 还原指定的数据库文件
    /// </summary>
    /// <param name="databasename">要还原的数据库</param>
    /// <param name="databasefile">数据库备份文件及路径</param>
    /// <returns></returns>
    public static bool RecoverSql(string databasename, string databasefile)
    {
        try
        {
            //还原指定的数据库文件
            string sql = "RESTORE DATABASE " + databasename + " FROM DISK = '" + databasefile + "' ";

            if (Common.ExeSql(sql) != 0)
                return true;
            else
                return false;
        }
        catch
        {
            return false;
        }
    }
    #endregion

    #region 根据指定的文件名称创建access数据库
    /// <summary>
    /// 根据指定的文件名称创建数据
    /// </summary>
    /// <param name="mdbPath">绝对路径+文件名称</param>
    public static bool CreateAccess(string mdbPath)
    {
        if (File.Exists(mdbPath))//检查数据库是否已存在
        {
            return false;
        }
        else
        {
            try
            {
                mdbPath = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + mdbPath;
                //创建一个CatalogClass对象实例
                ADOX.CatalogClass cat = new ADOX.CatalogClass();
                //使用CatalogClass对象的Create方法创建ACCESS数据库
                cat.Create(mdbPath);
                return true;
            }
            catch
            {
                return false;
            }
        }
    }
    #endregion

    #region 压缩Access数据库
    /// <summary>
    /// 压缩Access数据库
    /// </summary>
    /// <param name="mdbPath">数据库绝对路径</param>
    public static bool CompactAccess(string mdbPath)
    {
        try
        {
            //声明临时数据库名称
            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";

            string srcconn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + mdbPath;
            string destPath = mdbPath.Substring(0, mdbPath.LastIndexOf("") + 1) + temp;
            string destconn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + destPath;

            //创建一个JetEngineClass对象的实例
            JRO.JetEngineClass jt = new JRO.JetEngineClass();
            //使用JetEngineClass对象的CompactDatabase方法压缩修复数据库
            jt.CompactDatabase(srcconn, destconn);
            //拷贝临时数据库到目标数据库(覆盖)
            File.Copy(destPath, mdbPath, true);
            //最后删除临时数据库
            File.Delete(destPath);
            return true;
        }
        catch
        {
            return false;
        }
    }
    #endregion

    #region 备份Access数据库
    /// <summary>
    /// 备份Access数据库
    /// </summary>
    /// <param name="srcPath">要备份的数据库绝对路径</param>
    /// <param name="aimPath">备份到的数据库绝对路径</param>
    /// <returns></returns>
    public static bool BakAccess(string srcPath, string aimPath)
    {
        try
        {
            //声明临时数据库名称
            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";

            string srcconn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + srcPath;
            string destconn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + aimPath.Substring(0, aimPath.LastIndexOf(".") + 1) + temp;

            //创建一个JetEngineClass对象的实例
            JRO.JetEngineClass jt = new JRO.JetEngineClass();
            //使用JetEngineClass对象的CompactDatabase方法压缩修复数据库
            jt.CompactDatabase(srcconn, destconn);
            return true;
        }
        catch
        {
            return false;
        }
    }

    #endregion

    #region 还原Access数据库
    /// <summary>
    /// 还原Access数据库
    /// </summary>
    /// <param name="bakPath">备份的数据库绝对路径</param>
    /// <param name="mdbPath">要还原的数据库绝对路径</param>
    public static bool RecoverAccess(string bakPath, string mdbPath)
    {
        try
        {
            File.Copy(bakPath, mdbPath, true);
            return true;
        }
        catch
        {
            return false;
        }
    }
    #endregion
}