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This article mainly explains "how to solve the Linq To SQL data problem". The content of the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn how to solve the Linq To SQL data problem.

1. Build a project named DLinq, add a Linq To SQL data source, here take the classic Northwind database as an example, named NWDB.dbml.

two。 Build another Project as the DAL layer and add a Table factory so that we can get the Table through the entity

Using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace DAL {public staticclass TableFactory {publicstatic System.Data.Linq.Table CreateTable () where T: class {return Database.NWDB.GetTable ();} using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace DAL {publicstatic class Database {private static DLinq.NWDBDataContext _ NWDB = null Public static DLinq.NWDBDataContext NWDB {get {if (_ NWDB = = null) _ NWDB = new DLinq.NWDBDataContext (); return _ NWDB;}

3. With the help of Linq, you can now write general database operation classes.

Using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace DAL {public class Utility {public static void Insert (T TEntity) where T: class {var table = TableFactory.CreateTable (); table.InsertOnSubmit (TEntity);} public static IEnumerable Where (Func predicate) where T: class {var table = TableFactory.CreateTable (); return table.Where (predicate). AsEnumerable ();} public static void SubmitChanges () {Database.NWDB.SubmitChanges () } Thank you for reading, the above is the content of "how to solve the Linq To SQL data problem". After the study of this article, I believe you have a deeper understanding of how to solve the Linq To SQL data problem, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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