sqlserver备份

/// <summary>
    /// sqlserver备份
    /// </summary>
    public class SqlserverBack : IBack
    {
        private string backPath = string.Empty;

        public SqlserverBack()
        {
            backPath = ConfigurationManager.AppSettings["backPath"];
        }

        public string Back(string connstr)
        {
            if (string.IsNullOrWhiteSpace(connstr))
            {
                throw new ArgumentNullException("连接字符串不能为空");
            }
            using (SqlConnection conn = new SqlConnection(connstr))
            {
                conn.Open();

                string dbName = conn.Database;

                string backDirectory = Path.Combine(backPath, dbName);
                if (!Directory.Exists(backDirectory))
                {
                    Directory.CreateDirectory(backDirectory);
                }

                string backFileName = Path.Combine(backDirectory, $"{dbName}{DateTime.Now.ToString("yyyyMMddHHmmss")}.bak");

                string backSql = $"backup database {dbName} to disk='{backFileName}' WITH INIT;";

                SqlCommand cmd = new SqlCommand(backSql, conn);
                cmd.ExecuteNonQuery();
                return backFileName;
            }

        }

    }