sqlsever2008数据库的备份与还原

 本文数据库的名称为ProjectControl
  public static SqlConnection conn = new SqlConnection("server=(local);uid=sa;pwd=000;database=ProjectControl");
//备份

        public bool BackUpDataBase(string databasefile)

        {

            if (!File.Exists(databasefile))

            {



            }

            //还原的数据库MyDataBase

            string sql = "BACKUP DATABASE " + "ProjectControl" + " TO DISK = '" + databasefile + ".bak' ";

            conn.Open();

            SqlCommand comm = new SqlCommand(sql, conn);

            comm.CommandType = CommandType.Text;

            try

            {

                comm.ExecuteNonQuery();

            }

            catch (Exception err)

            {

                string str = err.Message;

                MessageBox.Show(str);

                conn.Close();



                return false;

            }

            MessageBox.Show("备份成功");

            conn.Close();//关闭数据库连接

            return true;

        }

        //还原

        public string RestoreDatabase(string backfile)

        {

            ///杀死原来所有的数据库连接进程

            SqlConnection conn = new SqlConnection();

            conn.ConnectionString = "Data Source=.;Initial Catalog=master;User ID=sa;pwd =000";

            conn.Open();

            string sql = "SELECT spid FROM sysprocesses ,sysdatabases WHERE sysprocesses.dbid=sysdatabases.dbid AND sysdatabases.Name='" +

                          "ProjectControl" + "'";

            SqlCommand cmd1 = new SqlCommand(sql, conn);

            SqlDataReader dr;

            ArrayList list = new ArrayList();

            try

            {

                dr = cmd1.ExecuteReader();

                while (dr.Read())

                {

                    list.Add(dr.GetInt16(0));

                }

                dr.Close();

            }

            catch (SqlException eee)

            {

                MessageBox.Show(eee.ToString());

            }

            finally

            {

                conn.Close();

            }

            //MessageBox.Show(list.Count.ToString());

            for (int i = 0; i < list.Count; i++)

            {

                conn.Open();

                cmd1 = new SqlCommand(string.Format("KILL {0}", list[i].ToString()), conn);

                cmd1.ExecuteNonQuery();

                conn.Close();

                //MessageBox.Show("系统已经清除的数据库线程： " + list[i].ToString() + "\r\n正在还原数据库！");

            }

            //这里一定要是master数据库，而不能是要还原的数据库，因为这样便变成了有其它进程

            //占用了数据库。

            string constr = @"Data Source=.;Initial Catalog=master;User ID=sa;pwd =tc0001";

            string database = "ProjectControl";

            string path = backfile;

            string BACKUP = String.Format("RESTORE DATABASE {0} FROM DISK = '{1}' WITH REPLACE", database, path);

            SqlConnection con = new SqlConnection(constr);

            SqlCommand cmd = new SqlCommand(BACKUP, con);

            con.Open();

            try

            {

                cmd.ExecuteNonQuery();

                MessageBox.Show("还原成功,点击退出系统！");

                Application.Exit();

            }

            catch (SqlException ee)

            {

                //throw(ee);



                //MessageBox.Show("还原失败");



                MessageBox.Show(ee.ToString());



            }

            finally

            {

                con.Close();

            }

            return "成功与否字符串";

        }