EF6使用Code First模式連線Postgresql資料庫
阿新 • • 發佈:2019-01-07
1. 通過Nuget 安裝 Npgsql
2. 通過Nuget 安裝 EntityFramework6.Npgsql
3. 建立一個包含空的Code Fisrt模型的專案。
4. 建立一個SysUser.cs的模型: (Table特性中Schema)
namespace YFrame.Model.EF { // EF會把dbo作為預設的資料庫schema, 而Postegres是public, // 解決方案 // 1. [Table("SysUser", Schema = "public")] 特性 // 2. 在PostgreSQL中建立完資料庫,再建立個名字為dbo的schema,所有的資料表和其他物件都建立在這個schema下 [Table("SysUser", Schema = "public")] public class SysUser { public int Id { get; set; } public string UserName { get; set; } public string Password { get; set; } } }
5. 修改YFrameContext.cs檔案
public class YFrameContext : DbContext { public YFrameContext() : base("name=YFrameContext") { } public virtual DbSet<SysUser> SysUser { get; set; } protected override void OnModelCreating(DbModelBuilder modelBuilder) { // 移除複數形式 modelBuilder.Conventions.Remove<PluralizingTableNameConvention>(); } }
6. 修改 App.config
<?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" /> <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 --> </configSections> <startup> <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" /> </startup> <connectionStrings> <add name="YFrameContext" connectionString="server=localhost;User Id=postgres;password=postgres;database=NAPP" providerName="Npgsql" /> </connectionStrings> <entityFramework> <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework"> <parameters> <parameter value="v13.0" /> </parameters> </defaultConnectionFactory> <providers> <provider invariantName="Npgsql" type="Npgsql.NpgsqlServices, EntityFramework6.Npgsql" /> <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" /> </providers> </entityFramework> <runtime> <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> <dependentAssembly> <assemblyIdentity name="Npgsql" publicKeyToken="5d8b90d52f46fda7" culture="neutral" /> <bindingRedirect oldVersion="0.0.0.0-3.1.0.0" newVersion="3.1.0.0" /> </dependentAssembly> </assemblyBinding> </runtime> <system.data> <DbProviderFactories> <remove invariant="Npgsql"></remove> <add name="Npgsql Data Provider" invariant="Npgsql" description=".Net Framework Data Provider for Postgresql Server" type="Npgsql.NpgsqlFactory, Npgsql" /> <add name="dotConnect for PostgreSQL" invariant="Devart.Data.PostgreSql" description="Devart dotConnect for PostgreSQL" type="Devart.Data.PostgreSql.PgSqlProviderFactory, Devart.Data.PostgreSql, Version= 7.7.804.0, Culture=neutral, PublicKeyToken=09af7300eec23701" /> </DbProviderFactories> </system.data> </configuration>
7. 建立YFrameInitializer.cs, 用來處理化資料庫。
namespace YFrame.Model.EF
{
public class YFrameInitializer : DropCreateDatabaseIfModelChanges<YFrameContext>
{
protected override void Seed(YFrameContext context)
{
new List<SysUser> {
new SysUser { Id = 10, UserName = "yang"},
new SysUser { Id = 11, UserName = "chao"}
}.ForEach(a => context.SysUser.Add(a));
context.SaveChanges();
}
}
}
8. 測試是否連線成功。
namespace ConsoleTest
{
class Program
{
static void Main(string[] args)
{
// 初始化資料庫
Database.SetInitializer<YFrameContext>(new YFrameInitializer());
using (var db = new YFrameContext())
{
SysUser user = new SysUser { Id = 1, UserName = "zhao" };
db.SysUser.Add(user);
db.SaveChanges();
var list = db.SysUser;
foreach (var item in list)
{
Console.WriteLine(item.Id + item.UserName);
}
}
Console.ReadLine();
}
}
}