/// <summary>
    /// 备份数据库至制定目录
    /// </summary>
    /// <param name="sSeverName">服务器名</param>
    /// <param name="sDataBase">数据库名</param>
    /// <param name="sUserName">用户名</param>
    /// <param name="sPassWord">密码</param>
    /// <param name="sPath">保存路径</param>
    /// <returns></returns>
    public static FileInfo BackUp(string sSeverName,string sDataBase,string sUserName,string sPassWord,string sPath)
    {
        sqldmo.BackupClass oBackup=new sqldmo.BackupClass();
        sqldmo.SQLServerClass oSqlServer=new sqldmo.SQLServerClass();
        oSqlServer.LoginSecure=false;
        oSqlServer.Connect(sSeverName,sUserName,sPassWord);
        oBackup.Action = SQLDMO_BACKUP_TYPE.SQLDMOBackup_Database;
        oBackup.Database = sDataBase;
        oBackup.Files = sPath;
        oBackup.BackupSetName = sDataBase;
        oBackup.BackupSetDescription = sDataBase+"Back";
        oBackup.Initialize = true;
        oBackup.SQLBackup(oSqlServer);
        oSqlServer.DisConnect();
        FileInfo fi = new System.IO.FileInfo(sPath);
        return fi;
    }