正文
ASP.NET Core 1.0 中 EntityFramework 与 PostgreSQL 的使用
提示：扫一扫查出行【扫一扫了解最新限行尾号】
复制提示
https://docs.efproject.net/en/latest/providers/npgsql/index.html
前面在CentOS6.7环境下配置好了PostgreSQL, 就顺便试了一下 ASP.NET Core 1.0 环境下EF与PostgreSQL的使用,就是.NET Core 还不支持CentOS，要么就可以部署一下试试。
依赖包
"dependencies": {
"Microsoft.AspNet.Diagnostics": "1.0.0-rc1-final",
"Microsoft.AspNet.IISPlatformHandler": "1.0.0-rc1-final",
"Microsoft.AspNet.Mvc": "6.0.0-rc1-final",
"Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-rc1-final",
"Microsoft.AspNet.Server.Kestrel": "1.0.0-rc1-final",
"Microsoft.AspNet.StaticFiles": "1.0.0-rc1-final",
"Microsoft.AspNet.Tooling.Razor": "1.0.0-rc1-final",
"Microsoft.Extensions.Configuration.FileProviderExtensions": "1.0.0-rc1-final",
"Microsoft.Extensions.Configuration.Json": "1.0.0-rc1-final",
"Microsoft.Extensions.Logging": "1.0.0-rc1-final",
"Microsoft.Extensions.Logging.Console": "1.0.0-rc1-final",
"Microsoft.Extensions.Logging.Debug": "1.0.0-rc1-final",
"Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-rc1-final",
"EntityFramework.Commands": "7.0.0-rc1-final",
"EntityFramework7.Npgsql": "3.1.0-rc1-3",
"EntityFramework7.Npgsql.Design": "3.1.0-rc1-5"
},
"commands": {
"web": "Microsoft.AspNet.Server.Kestrel",
"ef": "EntityFramework.Commands"
},
CODE FISRT
public class StockHqDbContext : DbContext
{
public DbSet<Blog> Blogs { get; set; }
public DbSet<Post> Posts { get; set; } protected override void OnModelCreating(ModelBuilder modelBuilder)
{
// Make Blog.Url required
modelBuilder.Entity<Blog>()
.Property(b => b.Url)
.IsRequired();
}
}
public class Blog
{
public int BlogId { get; set; }
public string Url { get; set; }
public List<Post> Posts { get; set; }
}
public class Post
{
public int PostId { get; set; }
public string Title { get; set; }
public string Content { get; set; }
public int BlogId { get; set; }
public Blog Blog { get; set; }
}
注册PostgreSqlProvider
public void ConfigureServices(IServiceCollection services)
{
var connection = Configuration["PostgreSqlProvider:ConnectionString"];
services.AddEntityFramework()
.AddNpgsql()
.AddDbContext<StockHqDbContext>(options => options.UseNpgsql(connection));
// Add framework services.
services.AddMvc();
}
配置文件
{
"Logging": {
"IncludeScopes": false,
"LogLevel": {
"Default": "Verbose",
"System": "Information",
"Microsoft": "Information"
}
},
"PostgreSqlProvider": {
"ConnectionString": "User ID=postgres;Password=xxxxx;Host=xxx.xxx.xxx.xxx;Port=5432;Database=stockhq;Pooling=true;"
}
}
执行命令
dnvm use 1.0.0-rc1-final(dnvm install 1.0.0-rc1-final)
dnx ef migrations add FirstMigration
dnx ef database update
构造页面
public class BlogsController : Controller
{
private StockHqDbContext _context; public BlogsController(StockHqDbContext context)
{
_context = context;
} public IActionResult Index()
{
return View(_context.Blogs.ToList());
} public IActionResult Create()
{
return View();
} [HttpPost]
[ValidateAntiForgeryToken]
public IActionResult Create(Blog blog)
{
if (ModelState.IsValid)
{
_context.Blogs.Add(blog);
_context.SaveChanges();
return RedirectToAction("Index");
} return View(blog);
} }
视图
@model IEnumerable<StockHq.Models.Blog>
@{
ViewBag.Title = "Blogs";
}
<h2>Blogs</h2>
<p>
<a asp-controller="Blogs" asp-action="Create">Create New</a>
</p>
<table class="table">
<tr>
<th>Id</th>
<th>Url</th>
</tr>
@foreach (var item in Model)
{
<tr>
<td>
@Html.DisplayFor(modelItem => item.BlogId)
</td>
<td>
@Html.DisplayFor(modelItem => item.Url)
</td>
</tr>
}
</table> @model StockHq.Models.Blog
@{
ViewBag.Title = "New Blog";
}
<h2>@ViewData["Title"]</h2>
<form asp-controller="Blogs" asp-action="Create" method="post" class="form-horizontal" role="form">
<div class="form-horizontal">
<div asp-validation-summary="ValidationSummary.All" class="text-danger"></div>
<div class="form-group">
<label asp-for="Url" class="col-md-2 control-label"></label>
<div class="col-md-10">
<input asp-for="Url" class="form-control" />
<span asp-validation-for="Url" class="text-danger"></span>
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Create" class="btn btn-default" />
</div>
</div>
</div>
</form>
访问：http://localhost:49648/Blogs/Create 增加数据，完事，睡觉。
REFER:
http://dotnet.github.io/getting-startedhttps://github.com/aspnet/EntityFramework
https://github.com/npgsql/npgsql
.NET跨平台：在Linux上基于ASP.NET 5用EF7生成数据库
http://www.cnblogs.com/dudu/p/4621933.html十分钟轻松让你认识Entity Framework 7
http://www.cnblogs.com/n-pei/p/4274907.html
