在c#中运用sqldmo备份和恢复microsoft sql server数据

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Windows;
using System.Windows.Forms;
using System.Collections;

namespace WindowsApplication1
{
    class Class1
    {
        ProgressBar PBar;

        //取得数据库服务器列表：
        public ArrayList GetServerList()
        {
            ArrayList alServers = new ArrayList() ;
            SQLDMO.Application sqlApp = new SQLDMO.ApplicationClass() ;
            try
            {
                SQLDMO.NameList serverList = sqlApp.ListAvailableSQLServers() ;
                for(int i = 1;i<= serverList.Count;i++)
                {
                    alServers.Add(serverList.Item(i)) ;
                }
            }
            catch (Exception e)
            {
                throw (new Exception("取数据库服务器列表出错：" + e.Message));
            }
            finally
            {
                sqlApp.Quit();
            }
            return alServers;
        }

        //取得指定数据库服务器的数据库列表
        public ArrayList GetDbList(string strServerName, string strUserName, string strPwd)
        {
            string ServerName = strServerName;
            string UserName = strUserName;
            string Password = strPwd;

            ArrayList alDbs = new ArrayList();
            SQLDMO.Application sqlApp = new SQLDMO.ApplicationClass();
            SQLDMO.SQLServer svr = new SQLDMO.SQLServerClass();
            try
            {
                svr.Connect(ServerName, UserName, Password);
                foreach (SQLDMO.Database db in svr.Databases)
                {
                    if (db.Name != null)
                        alDbs.Add(db.Name);
                }
            }
            catch (Exception e)
            {
                throw (new Exception("连接数据库出错：" + e.Message));
            }
            finally
            {
                svr.DisConnect();
                sqlApp.Quit();
            }
            return alDbs;
        }

        //数据库的备份和实时进度显示代码：
        public bool BackUPDB(string ServerName, string UserName, string Password, string strDbName, string strFileName, ProgressBar pgbMain)
        {
            PBar = pgbMain;
            SQLDMO.SQLServer svr = new SQLDMO.SQLServerClass();
            try
            {
                svr.Connect(ServerName, UserName, Password);
                SQLDMO.Backup bak = new SQLDMO.BackupClass();
                bak.Action = 0;
                bak.Initialize = true;
                SQLDMO.BackupSink_PercentCompleteEventHandler pceh = new SQLDMO.BackupSink_PercentCompleteEventHandler(Step);
                bak.PercentComplete += pceh;

                bak.Files = strFileName;
                bak.Database = strDbName;
                bak.SQLBackup(svr);

                return true;
            }
            catch (Exception err)
            {
                throw (new Exception("备份数据库失败" + err.Message));
                //return false ;
                //MessageBox.Show("备份数据库失败"+err.Message);
            }
            finally
            {
                svr.DisConnect();
            }
        }

        //数据库的恢复和杀死进程的代码：
        public bool RestoreDB(string ServerName, string UserName, string Password, string strDbName, string strFileName, ProgressBar pgbMain)
        {
            PBar = pgbMain;
            SQLDMO.SQLServer svr = new SQLDMO.SQLServerClass();
            try
            {
                svr.Connect(ServerName, UserName, Password);
                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() == strDbName.ToUpper())
                        svr.KillProcess(lPID);
                }

                SQLDMO.Restore res = new SQLDMO.RestoreClass();
                res.Action = 0;
                SQLDMO.RestoreSink_PercentCompleteEventHandler pceh = new SQLDMO.RestoreSink_PercentCompleteEventHandler(Step);
                res.PercentComplete += pceh;
                res.Files = strFileName;

                res.Database = strDbName;
                res.ReplaceDatabase = true;
                res.SQLRestore(svr);
                return true;
            }
            catch (Exception err)
            {
                throw (new Exception("恢复数据库失败,请关闭所有和该数据库连接的程序！" + err.Message));
                //return false ;
                //MessageBox.Show("恢复数据库失败,请关闭所有和该数据库连接的程序！"+err.Message);
            }
            finally
            {
                svr.DisConnect();
            }
        }

        private void Step(string message, int percent)
        {
            PBar.Value = percent;
        }
    }
}