C#操作ACCESS数据库(创建,压缩,备份,恢复)
2009-04-20 08:26:30 来源:WEB开发网当调用此方法时请确认被压缩数据库无打开的连接.
C#操作ACCESS数据库 代码如下:
/// MBD compact method © 2004 Alexander Youmashev
/// !!IMPORTANT!!
/// !make sure there's no open connections
/// to your db before calling this method!
/// !!IMPORTANT!!
///
///
connection string to your db
///
FULL name
/// of an MDB file you want to compress.
Public static void CompactAccessDB(string connectionString, string mdwfilename)
{
object[] oParams;
//create an inctance of a Jet Replication Object
object objJRO =
Activator.CreateInstance(Type.GetTypeFromProgID("JRO.JetEngine"));
//filling Parameters array
//cnahge "Jet OLEDB:Engine Type=5" to an appropriate value
// or leave it as is if you db is JET4X format (access 2000,2002)
//(yes, jetengine5 is for JET4X, no misprint here)
oParams = new object[] {
connectionString,
"Provider=Microsoft.Jet.OLEDB.4.0;Data" +
" Source=C:tempdb.mdb;Jet OLEDB:Engine Type=5"};
//invoke a CompactDatabase method of a JRO object
//pass Parameters array
objJRO.GetType().InvokeMember("CompactDatabase",
System.Reflection.BindingFlags.InvokeMethod,
null,
objJRO,
oParams);
//database is compacted now
//to a new file C:tempdb.mdw
//let's copy it over an old one and delete it
System.IO.File.Delete(mdwfilename);
System.IO.File.Move("C:tempdb.mdb", mdwfilename);
//clean up (just in case)
System.Runtime.InteropServices.Marshal.ReleaseComObject(objJRO);
objJRO=null;
}
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