ASP.NET Core 1.0 中 EntityFramework 与 PostgreSQL 的使用
2016-03-18 00:36
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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-started
https://github.com/aspnet/EntityFramework
https://github.com/npgsql/npgsql
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