C#创建数据库 附加数据库等操作

				/// <summary>
				/// 附加数据库方法
				/// </summary>
				/// <param name="strSql">连接数据库字符串，连接master系统数据库</param>
				/// <param name="DataName">数据库名字</param>
				/// <param name="strMdf">数据库文件MDF的路径</param>
				/// <param name="strLdf">数据库文件LDF的路径</param>
				/// <param name="path">安装目录</param>
				private   void  CreateDataBase( string  strSql, string  DataName,  string  strMdf,  string  strLdf, string  path)
				{
				   SqlConnection myConn = new SqlConnection(strSql);
				   String str = null ;
				   try
				   {
				      str = " EXEC sp_attach_db @dbname='"+DataName+"',@filename1='"+strMdf+"',@filename2='"+strLdf+"'";
				      SqlCommand myCommand = new SqlCommand(str, myConn);
				      myConn.Open();
				      myCommand.ExecuteNonQuery();
				      MessageBox.Show("数据库安装成功！点击确定继续");//需Using System.Windows.Forms
				   }
				   catch(Exception e)
				   {
				      MessageBox.Show("数据库安装失败！" + e.Message+"\n\n"+"您可以手动附加数据");
				      System.Diagnostics.Process.Start(path);//打开安装目录
				   }
				   finally
				   {
				      myConn.Close();
				   }
				}
				
				public override void Install(System.Collections.IDictionary stateSaver)
				{
				   string server = this.Context.Parameters["server"];//服务器名称
				    string uid = this.Context.Parameters["user"];//SQlServer用户名
				    string pwd = this.Context.Parameters["pwd"];//密码
				    string path = this.Context.Parameters["targetdir"];//安装目录
				    string strSql = "server=" + server + ";uid=" + uid + ";pwd=" + pwd + ";database=master";//连接数据库字符串
				    string DataName = "JXC";//数据库名
				    string strMdf = path + @"JXC.mdf";//MDF文件路径，这里需注意文件名要与刚添加的数据库文件名一样！
				    string strLdf = path + @"jxc_log.ldf";//LDF文件路径
				    base.Install(stateSaver);
				   this.CreateDataBase(strSql, DataName, strMdf, strLdf, path);//开始创建数据库
				} 


 				/// <summary>
        /// 测试连接
        /// </summary>
        /// <param name="serverName"></param>
        /// <param name="dbName"></param>
        /// <param name="userName"></param>
        /// <param name="password"></param>
        private SqlConnection TestConnection(string serverName, string dbName, string userName, string password)
        {
            string connectionString = GetConnectionString(serverName, dbName, userName, password);
            SqlConnection connection = new SqlConnection(connectionString);
            try
            {
                if (connection.State != ConnectionState.Open)
                {
                    connection.Open();
                }
                return connection;
            }
            catch
            {
                CloseConnection(connection);
                throw new InstallException("安装失败!\n数据库配置有误,请正确配置信息！");
            }
        }


        /// <summary>
        /// 得到连接字符串
        /// </summary>
        /// <param name="serverName"></param>
        /// <param name="dbName"></param>
        /// <param name="userName"></param>
        /// <param name="password"></param>
        /// <returns></returns>
        private string GetConnectionString(string serverName, string dbName, string userName, string password)
        {
            string connectionString = "Data Source={0};Initial Catalog={1};User ID={2};Password={3}";
            connectionString = string.Format(connectionString, serverName, dbName, userName, password);
            return connectionString;
        }

        /// <summary>
        /// 创建数据库
        /// </summary>
        /// <param name="serverName"></param>
        /// <param name="dbName"></param>
        /// <param name="userName"></param>
        /// <param name="password"></param>
        /// <param name="connection"></param>
        /// <param name="stateSaver"></param>
        public int CreateDataBase(SqlConnection connection)
        {
            int result = -1;
            connection.ChangeDatabase("master");
            string createDBSql = @" if Exists(select 1 from sysdatabases where [name]=N'{0}')
                                    begin
                                    drop database {0}
                                    end
                                    GO 
                                    CREATE DATABASE {0} ";
            createDBSql = string.Format(createDBSql, _dbName);

            //因为有Go在SQLCommand中不认识，所以以Go为分隔符取sql语句

            char[] split = new char[] { 'G', 'O' };
            string[] sqlList = createDBSql.Split(split);

            SqlCommand command = null;
            try
            {
                command = connection.CreateCommand();
                command.CommandType = System.Data.CommandType.Text;
                foreach (string sqlItem in sqlList)
                {
                    if (sqlItem.Length > 2)
                    {
                        command.CommandText = sqlItem;
                        result = command.ExecuteNonQuery();
                    }
                }
                return result;
            }
            catch
            {
                CloseConnection(connection);
                command.Dispose();
                throw new InstallException("安装失败!\n数据库配置不正确!");
            }
        }

        /// <summary>
        /// 分隔SQL语句
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        private string[] splitSql(string sql)
        {
            Regex regex = new Regex("^GO", RegexOptions.IgnoreCase | RegexOptions.Multiline);
            string[] sqlList = regex.Split(sql.ToUpper());
            return sqlList;
        }