{"id":5888,"date":"2022-07-07T04:32:11","date_gmt":"2022-07-07T04:32:11","guid":{"rendered":"https:\/\/studysection.com\/blog\/?p=5888"},"modified":"2022-07-07T05:03:51","modified_gmt":"2022-07-07T05:03:51","slug":"table-data-gateway-pattern-in-c","status":"publish","type":"post","link":"https:\/\/studysection.com\/blog\/table-data-gateway-pattern-in-c\/","title":{"rendered":"Table Data Gateway Pattern in C#"},"content":{"rendered":"<p>It is an object that acts as a Gateway to a database table. It handles all the rows in the table.<br \/>\n<strong>Gateway:<\/strong> It is an object that encapsulates access to an external system or resource.<\/p>\n<h2>It holds all the SQL for accessing a single table or view:<\/h2>\n<ul>\n<li>Selects, inserts, updates, and deletes. <\/li>\n<li>It is a method for all interactions with the database.<\/li>\n<li>Providing a gateway class for each database table and mixing <a href=\"https:\/\/studysection.com\/blog\/sql-best-practices\/\">SQL<\/a> in application logic can cause several problems and separates the SQL queries from code.<\/li>\n<li>It has a simple interface, usually consisting of several find methods to get data from the database and update, insert, and delete methods.<\/li>\n<li>The maps are the input parameters into a SQL call and execute the SQL against a database connection. It is usually stateless, as its role is to push data back and forth.<\/li>\n<\/ul>\n<h3>The pattern separates the SQL queries from the source code.<\/h3>\n<ul>\n<li>It is probably the database interface pattern to use, as it maps so nicely onto a database table or record type. <\/li>\n<li>I use it least with Domain Model because Data Mapper gives better isolation between the Domain Model and a database.<\/li>\n<li>It has one for each table in the database. <\/li>\n<li>It is a single Table Data Gateway that handles all methods for all tables.<\/li>\n<li>To encapsulate database access and the same interface can work both for using SQL to manipulate the database and for using stored procedures.<\/li>\n<\/ul>\n<h3>Sample Code:<\/h3>\n<p><strong>Step1:<\/strong><br \/>\n<code>Create a Model Class:<br \/>\npublic class Employee{<br \/>\nprivate  int id;<br \/>\nprivate  string emp_name;<br \/>\nprivate  string dept_name;<br \/>\nprivate  string gender;<br \/>\nprivate int age;<br \/>\nprivate  float salary;<br \/>\n}<\/code><\/p>\n<p><strong>Step 2:<\/strong> Create an EmployeeGatway class: It holds all the SQL for accessing a single table or view: select, inserts, updates, and deletes.<br \/>\n<code>public class EmployeeGateWay{<br \/>\npublic RecordSet find(int id)<br \/>\n{<br \/>\n\/\/ find employee record by id.<br \/>\n}<br \/>\npublic  RecordSet findByName()<br \/>\n{<br \/>\n\/\/ find employee records by Name.<br \/>\n}<br \/>\npublic  void update(sting emp_name,string dept_name,int age)<br \/>\n{<br \/>\n\/\/update employee entity.<br \/>\n}<br \/>\npublic void insert(string emp_name,string dept_name,string gender,int age,float salary)<br \/>\n{<br \/>\n\/\/insert employee entity<br \/>\n}<br \/>\npublic  void delete(int id)<br \/>\n{<br \/>\n\/\/Delete employee records by id from the database.<br \/>\n}<br \/>\n}<\/code><\/p>\n<p><small><em>English is a commonly used language in almost all fields today. Having a certification in the English language can enhance your career aspects. StudySection offers both basic level and advanced level <a href=\"https:\/\/www.studysection.com\/english-language-advanced-diploma\">English Certification Exams<\/a> to test and certify the English language skills.<\/em><\/small><\/p>\n","protected":false},"excerpt":{"rendered":"<p>It is an object that acts as a Gateway to a database table. It handles all the rows in the<\/p>\n","protected":false},"author":1,"featured_media":5889,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[142,792],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Table Data Gateway Pattern in C#-StudySection Blog<\/title>\n<meta name=\"description\" content=\"A Table Data Gateway Pattern is an object that encapsulates access to an external system or resource. 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