asp.net/C# 备份与还原SqlServer数据库

asp.net/C# 备份与还原数据库

功能：
自动识别Web.Config配置信息.
备份与还原数据库.
代码如下：
using System;
using System.Configuration;
using System.Data.SqlClient;
using System.Data;

namespace OA.Web
{

/// <summary>
/// SqlDbBackUpRestore类,主要应用SQLDMO实现对Microsoft SQL Server数据库 的备份和恢复
/// 请先给项目添加COM(Mircrosoft SQLDMO Object Library)引用
/// </summary>

public class SqlDbBackUpRestore
{
/// <summary>
/// sql服务器名称或者IP地址
/// </summary>
private string server;

/// <summary>
///用户名称
/// </summary>
private string uid;

/// <summary>
/// 用户密码
/// </summary>
private string pwd;

/// <summary>
/// 数据库名称
/// </summary>
private string database;

/// <summary>
/// Web.Config连接字符串
/// </summary>
private string conn;

/// <summary>
/// SqlDbBackUpRestore类的构造函数
/// </summary>
public SqlDbBackUpRestore()
{

conn = System.Configuration.ConfigurationSettings.AppSettings["ConnectionSqlServer"].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>
/// 数据库database备份
/// </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 = "数据库备份";

oBackup.Initialize = true;

oBackup.SQLBackup(oSQLServer);

return true;
}

catch
{
return false;
throw;
}

finally
{
oSQLServer.DisConnect();
}

}

/// <summary>
/// 数据库database恢复
/// </summary>

public string DbRestore(string url)
{

if (KillProcesses() != true)//执行存储过程
{

return "操作失败";

}
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 "恢复数据库失败";
throw;
}
finally
{
oSQLServer.DisConnect();
}

}

}

/// <summary>
/// 杀死Sql database 连接进程
/// </summary>
/// <returns></returns>
private bool KillProcesses()
{

SQLDMO.SQLServer svr = new SQLDMO.SQLServerClass();
try
{
svr.Connect(server, uid, pwd);
SQLDMO.QueryResults qr = svr.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() == database.ToUpper())
{

svr.KillProcess(lPID);
}
}
return true;
}
catch
{
//失败
return false;
}
finally
{
svr.DisConnect();
}

}

}

}