Entity Framework 6以Code First方式搭建Sqlite數據庫環境

 

 

對於EF支持Sqlite數據庫映射,網上似乎說得都不是很清楚,自己研究了會兒,現在給大家分享下~

 

所使用的庫版本

EntityFramework.6.1.0

SQLite.1.0.92.0

 

以上兩個庫可以通過nuget下載,具體下載方式不在此說明.

 

引用結構

 

 配置

App.config配置

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <entityFramework>
    <providers>
      <provider invariantName="System.Data.SQLite.EF6" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
    </providers>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="v11.0" />
      </parameters>
    </defaultConnectionFactory>
  </entityFramework>
  <connectionStrings>
    <add name="NorthwindContext" connectionString="Data Source=Northwind.sl3" providerName="System.Data.SQLite.EF6" />
  </connectionStrings>
  <system.data>
    <DbProviderFactories>
      <remove invariant="System.Data.SQLite.EF6" />
      <add name="SQLite Data Provider (Entity Framework 6)" invariant="System.Data.SQLite.EF6" description=".Net Framework Data Provider for SQLite (Entity Framework 6)" type="System.Data.SQLite.EF6.SQLiteProviderFactory, System.Data.SQLite.EF6" />
    </DbProviderFactories>
  </system.data>
</configuration>

 

這里provider配置只需要System.Data.SQLite.EF6就行.

 

 代碼實現

繼承DbContext,並定義實體

    public class NorthwindContext : DbContext
    {
        public DbSet<Employee> Employees { get; set; }
    }

    public class Employee
    {
        public int EmployeeID { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }
    }

 

測試

    class Program
    {
        static void Main(string[] args)
        {
            NorthwindContext context = new NorthwindContext();
            var empList = context.Employees.OrderBy(c => c.FirstName).ToList();

            Console.WriteLine(empList.Count);
            Console.ReadLine();
        }
    }

可以正確執行Linq.

 

參考:

http://hintdesk.com/sqlite-with-entity-framework-code-first-and-migration/

http://www.nullskull.com/a/10476742/sqlite-in-wpf-with-entity-framework-6.aspx

 

希望以上信息對你有用~

 

代碼下載