上次做了個項目，涉及到資料庫的還原和恢復，到網路上找了一下，是利用SQLDMO實現的，只要加入SQLDMO引用就好了，然後利用下邊的類的方法就可以實現了。
我把原作者的類別擴充了一下，可以自動辨識web.config裡的資料庫連接字串，可以透過變數設定還原恢復的資訊。
要注意的時還原，還原的時候問題最大了，有別的使用者使用資料庫的時候無法還原，解決方法就是在MASTER資料庫中新增一個預存程序：
create proc killspid (@dbname varchar(20))
as
begin
declare @sql nvarchar(500)
declare @spid int
set @sql='declare getspid cursor for
select spid from sysprocesses where dbid=db_id( '''+@dbname+''')'
exec (@sql)
open getspid
fetch next from getspid into @spid
while @@fetch_status<>-1
begin
exec('kill '+@spid )
fetch next from getspid into @spid
end
close getspid
deallocate getspid
end
GO
在還原之前先執行這個預存程序，需要傳遞dbname，就是你的資料庫的名字。下邊是類別的原始程式碼：（web.config裡的資料庫連接字串是constr）
using System;
using System.Configuration;
using System.Data.SqlClient;
using System.Data;
namespace web.base_class
{
/// <summary>
/// DbOper類別,主要應用SQLDMO實作對Microsoft SQL Server資料庫的備份與復原
/// </summary>
public class DbOper
{
private string server;
private string uid;
private string pwd;
private string database;
private string conn;
/// <summary>
/// DbOper類別的建構子
/// </summary>
public DbOper()
{
conn=System.Configuration.ConfigurationSettings.AppSettings["constr"].ToString();
server=cut(conn,"server=",";");
uid=cut(conn,"uid=",";");
pwd=cut(conn,"pwd=",";");
database=cut(conn,"database=",";");
}
public string cut(string str,string bg,string ed)
{
string sub;
sub=str.Substring(str.IndexOf(bg)+bg.Length);
sub=sub.Substring(0,sub.IndexOf(";"));
return sub;
}
/// <summary>
/// 資料庫備份
/// </summary>
public bool DbBackup(string url)
{
SQLDMO.Backup oBackup = new SQLDMO.BackupClass();
SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass();
try
{
oSQLServer.LoginSecure = false;
oSQLServer.Connect(server,uid, pwd);
oBackup.Action = SQLDMO.SQLDMO_BACKUP_TYPE.SQLDMOBackup_Database;
oBackup.Database = database;
oBackup.Files = url;//"d:Northwind.bak";
oBackup.BackupSetName = database;
oBackup.BackupSetDescription = "資料庫備份";
oBackup.Initialize = true;
oBackup.SQLBackup(oSQLServer);
return true;
}
catch
{
return false;
throw;
}
finally
{
oSQLServer.DisConnect();
}
}
/// <summary>
/// 資料庫恢復
/// </summary>
public string DbRestore(string url)
{
if(exepro()!=true)//執行預存程序
{
return "操作失敗";
}
else
{
SQLDMO.Restore oRestore = new SQLDMO.RestoreClass();
SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass();
try
{
oSQLServer.LoginSecure = false;
oSQLServer.Connect(server, uid, pwd);
oRestore.Action = SQLDMO.SQLDMO_RESTORE_TYPE.SQLDMORestore_Database;
oRestore.Database = database;
oRestore.Files = url;//@"d:Northwind.bak";
oRestore.FileNumber = 1;
oRestore.ReplaceDatabase = true;
oRestore.SQLRestore(oSQLServer);
return "ok";
}
catch(Exception e)
{
return "恢復資料庫失敗";
throw;
}
finally
{
oSQLServer.DisConnect();
}
}
}
private bool exepro()
{
SqlConnection conn1 = new SqlConnection("server="+server+";uid="+uid+";pwd="+pwd+";database=master");
SqlCommand cmd = new SqlCommand("killspid",conn1);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("@dbname","port");
try
{
conn1.Open();
cmd.ExecuteNonQuery();
return true;
}
catch(Exception ex)
{
return false;
}
finally
{
conn1.Close();
}
}
}
}