连接加密Access数据库的字符串设置方法
Access数据库在一些小的系统程序中经常用到，为了给数据库中的信息增加一些安全性，最简单的方法就是给Access文件加上密码（当然也可以 将数据库中的数据进行加密后在存放到文件里来保护数据，只不过这种方法需要在程序中考虑加密和解密的问题），那针对有密
Access数据库在一些小的系统程序中经常用到，为了给数据库中的信息增加一些安全性，最简单的方法就是给Access文件加上密码（当然也可以 将数据库中的数据进行加密后在存放到文件里来保护数据，只不过这种方法需要在程序中考虑加密和解密的问题），那针对有密码的文件通过数据库连接字符串来进 行连接访问呢？下面是我在网络上找到的一些解决方案。收集起来以备后用。
access数据库加密分3种
以下以access xp为例
1、工具 -> 安全-> 加密/解密数据库，打开时无需任何更改
2、工具 -> 安全-> 设置数据库密码，打开密码为 1 打开时需要使用
| "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\1.mdb;User ID=admin;Password=;Jet OLEDB:Database Password=1" |
也可以用
| "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\1.mdb;User ID='admin';Password=;Jet OLEDB:Database Password='1'" |
3、工具 -> 安全-> 用户组与权限 .... ，用户名为 admin 密码为 rr 用户组文件为 c:\system.mdw，打开时需要使用
| "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\1.mdb;User ID=admin;Password=rr;Jet OLEDB:Database Password=1;Jet OLEDB:System database=c:\system.mdw" |
也可以用
| "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:\1.mdb;User ID='admin';Password='rr';Jet OLEDB:Database Password='1';Jet OLEDB:System database=c:\system.mdw" |
如果在局域网上共享访问数据库，只要将绝对路径更改为 "\\计算机名\共享目录名\文件名.MDB" 即可，比如
| "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=\\access911\floder1\1.mdb;User ID='admin';Password='rr';Jet OLEDB:Database Password='1';Jet OLEDB:System database=\\access911\floder1\system.mdw" |
直接在连接字串里面定义 MODE 属性达到独占/公享等目的也是可以的，比如：
| JetOLEDB:GlobalPartialBulkOps=2;JetOLEDB:RegistryPath=;JetOLEDB:DatabaseLockingMode=1;JetOLEDB:DatabasePassword=;DataSource=D:\db.mdb;Password=;JetOLEDB:EngineType=5;JetOLEDB:GlobalBulkTransactions=1;Provider=Microsoft.Jet.OLEDB.4.0;JetOLEDB:Systemdatabase=;JetOLEDB:SFP=False;ExtendedProperties=;Mode=ShareDenyNone;JetOLEDB:NewDatabasePassword=;JetOLEDB:CreateSystemDatabase=False;JetOLEDB:Don'tCopyLocaleonCompact=False;JetOLEDB:CompactWithoutReplicaRepair=False;UserID=Admin;JetOLEDB:EncryptDatabase=False |
注意：Access 2007 在数据格式上有了很大变化，因此数据提供者已经不是 jet db 4.0 了，Microsoft.ACE.OLEDB.12.0 才是 *.accdb 的数据提供者。
Provider=Microsoft.ACE.OLEDB.12.0;User ID=Admin;Data Source=C:\Documents and Settings\chenge\My Documents\数据库1.accdb;Mode=Share Deny Read|Share Deny Write;Extended Properties="";Jet OLEDB:System database=C:\Documents and Settings\chenge\Application Data\Microsoft\Access\System.mdw;Jet OLEDB:Registry Path=Software\Microsoft\Office\12.0\Access\Access Connectivity Engine;Jet OLEDB:Database Password="";Jet OLEDB:Engine Type=6;Jet OLEDB:Database Locking Mode=0;Jet OLEDB:Global Partial Bulk Ops=2;Jet OLEDB:Global Bulk Transactions=1;Jet OLEDB:New Database Password="";Jet OLEDB:Create System Database=False;Jet OLEDB:Encrypt Database=False;Jet OLEDB:Don't Copy Locale on Compact=False;Jet OLEDB:Compact Without Replica Repair=False;Jet OLEDB:SFP=False;Jet OLEDB:Support Complex Data=True
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