{"id":1070,"date":"2022-04-09T18:11:09","date_gmt":"2022-04-09T10:11:09","guid":{"rendered":"http:\/\/www.wayln.com\/?p=1070"},"modified":"2022-04-09T23:01:52","modified_gmt":"2022-04-09T15:01:52","slug":"ef-core","status":"publish","type":"post","link":"https:\/\/www.wayln.com\/?p=1070","title":{"rendered":"EF Core"},"content":{"rendered":"<div id=\"toc_container\" class=\"toc_transparent no_bullets\"><p class=\"toc_title\">Contents<\/p><ul class=\"toc_list\"><li><a href=\"#i\"><span class=\"toc_number toc_depth_1\">1<\/span> \u6570\u636e\u5e93<\/a><\/li><li><a href=\"#SQLLocalDB\"><span class=\"toc_number toc_depth_1\">2<\/span> SQLLocalDB<\/a><ul><li><a href=\"#i-2\"><span class=\"toc_number toc_depth_2\">2.1<\/span> \u547d\u4ee4\u884c\u67e5\u8be2<\/a><\/li><\/ul><\/li><li><a href=\"#VSSqllocaldb\"><span class=\"toc_number toc_depth_1\">3<\/span> \u5728VS\u4e2d\u67e5\u770bSqllocaldb<\/a><\/li><li><a href=\"#VSSQLLocalDB\"><span class=\"toc_number toc_depth_1\">4<\/span> \u5728VS\u4e2d\u8fde\u63a5SQLLocalDB<\/a><\/li><\/ul><\/div>\n<h1><span id=\"i\">\u6570\u636e\u5e93<\/span><\/h1>\n<ul>\n<li>MSSQL LocalDB<\/li>\n<li>PostgreSQL<\/li>\n<li>MySQL\/MariaDB<\/li>\n<li>Oracle<\/li>\n<li>DB2<\/li>\n<li>SQLite<\/li>\n<li>In Memory<\/li>\n<li>&#8230;<\/li>\n<\/ul>\n<h1><span id=\"SQLLocalDB\">SQLLocalDB<\/span><\/h1>\n<h2><span id=\"i-2\">\u547d\u4ee4\u884c\u67e5\u8be2<\/span><\/h2>\n<ul>\n<li>SQLLocalDB<\/li>\n<li>SQLLocalDB info<\/li>\n<\/ul>\n<p>\u5982\u679c\u6ca1\u6709\u5b9e\u4f8b \u5219\u521b\u5efa\uff0c\u542f\u52a8\u3002\u521b\u5efa\u542f\u52a8\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>sqllocaldb create mssqllocaldb<\/p>\n<\/li>\n<li>\n<p>sqllocaldb start mssqllocaldb<\/p>\n<\/li>\n<\/ul>\n<h1><span id=\"VSSqllocaldb\">\u5728VS\u4e2d\u67e5\u770bSqllocaldb<\/span><\/h1>\n<p><a class=\"wp-editor-md-post-content-link\" href=\"http:\/\/www.wayln.com\/wp-content\/uploads\/2022\/04\/wp_editor_md_90121c4f7c528beada2470b813545eb3.jpg\"><img decoding=\"async\" src=\"http:\/\/www.wayln.com\/wp-content\/uploads\/2022\/04\/wp_editor_md_90121c4f7c528beada2470b813545eb3.jpg\" alt=\"\" \/><\/a><\/p>\n<h1><span id=\"VSSQLLocalDB\">\u5728VS\u4e2d\u8fde\u63a5SQLLocalDB<\/span><\/h1>\n<ol>\n<li>\u5728VS Sql server\u5bf9\u8c61\u8d44\u6e90\u7ba1\u7406\u5668\u4e2d\u67e5\u770b\u5bf9\u5e94\u6570\u636e\u5e93\u7684\u8fde\u63a5\u5b57\u7b26\u4e32<br \/>\n\u4f8b\u5982\uff1a<br \/>\nData Source=(localdb)\\MSSQLLocalDB;Initial Catalog=ASPEFCoreDemo;Integrated Security=True;Connect Timeout=30;Encrypt=False;TrustServerCertificate=False;ApplicationIntent=ReadWrite;MultiSubnetFailover=False<\/li>\n<li>\u5728\u9879\u76ee\u7684appsettings.json\u4e2d\u6dfb\u52a0\u8fde\u63a5\u5b57\u7b26\u4e32<\/li>\n<\/ol>\n<pre><code class=\"language-json line-numbers\">{\n  \"Logging\": {\n    \"LogLevel\": {\n      \"Default\": \"Information\",\n      \"Microsoft\": \"Warning\",\n      \"Microsoft.Hosting.Lifetime\": \"Information\"\n    }\n  },\n  \"AllowedHosts\": \"*\",\n  \"ConnectionStrings\": {\n    \"DefaultConnection\": \"Data Source=(localdb)\\\\MSSQLLocalDB;Initial Catalog=ASPEFCoreDemo;Integrated Security=True;Connect Timeout=30;Encrypt=False;TrustServerCertificate=False;ApplicationIntent=ReadWrite;MultiSubnetFailover=False\"\n  }\n}\n<\/code><\/pre>\n<ol start=\"3\">\n<li>\u6dfb\u52a0Nuget\u5305\u6587\u4ef6\n<ul>\n<li>Microsoft.EntityFrameworkCore<\/li>\n<li>Microsoft.EntityFrameworkCore.SqlServer<\/li>\n<li>Microsoft.EntityFrameworkCore.Tools<\/li>\n<\/ul>\n<\/li>\n<li>\u5efa\u7acbData\u6587\u4ef6\u5939<\/li>\n<\/ol>\n<p>&#8211; \u5728Data\u6587\u4ef6\u5939\u4e2d\u521b\u5efaDataContext.cs<br \/>\n&#8211; \u8ba9\u8be5\u7c7b\u7ee7\u627f\u81eaDbContext<br \/>\n&#8211; \u6dfb\u52a0\u547d\u540d\u7a7a\u95f4using Microsoft.EntityFrameworkCore;<br \/>\n&#8211; \u5728\u6784\u9020\u51fd\u6570\u4e2d\u6dfb\u52a0DbContextOptions\u5e76\u4f20\u7ed9\u7236\u7c7b<br \/>\n&#8211; \u6dfb\u52a0\u6240\u7528\u7684\u6620\u5c04\u5230\u6570\u636e\u5e93\u8868\u7684DbSet\u7c7b<\/p>\n<pre><code class=\"language-CSharp line-numbers\">    public class DataContext : DbContext\n    {\n    \/\/public\u5f88\u91cd\u8981\uff0c\u9ed8\u8ba4alt+enter\u751f\u6210\u7684\u662fprotected,\u5bfc\u81f4\u6570\u636e\u5e93\u8fc1\u79fb\u4e0d\u6210\u529f\n        public DataContext(DbContextOptions&lt;DataContext&gt; options):base(options)\n        {\n        }\n        public DbSet&lt;Student&gt; Students { get; set; }\n    }\n<\/code><\/pre>\n<ul>\n<li>\u4e3a\u4e86\u65b9\u4fbf\u6d4b\u8bd5\uff0c\u4f7f\u7528\u4f9d\u8d56\u6ce8\u5165\uff0c\u5efa\u7acb\u4e00\u4e2aDataCOntext\u7684\u670d\u52a1<br \/>\n\u5728Startup.cs\u4e2d\u6dfb\u52a0\u6ce8\u518c\u670d\u52a1<\/li>\n<\/ul>\n<pre><code class=\"language-CSharp line-numbers\">\/\/\u914d\u7f6e\u6587\u4ef6\uff0c\u8bfb\u53d6appsettings.json\u7684\u6570\u636e\u5e93\u8fde\u63a5\u5b57\u7b26\u4e32\n  private readonly IConfiguration configuration;\n\n          public Startup(IConfiguration configuration)\n        {\n            this.configuration = configuration;\n        }\n\n        public void ConfigureServices(IServiceCollection services)\n        {\n            services.AddControllersWithViews();\n            var connectionString = configuration[\"ConnectionStrings:DefaultConnection\"];\n            services.AddDbContext&lt;DataContext&gt;(options =&gt; { options.UseSqlServer(connectionString); });\n        }\n<\/code><\/pre>\n<ol start=\"5\">\n<li>\u8fc1\u79fb<br \/>\n\u6240\u7528\u7684\u5de5\u5177\u4e3b\u8981\u6709\u4ee5\u4e0b\u4e24\u4e2a<\/li>\n<\/ol>\n<p>&#8211; Package Manage Console<br \/>\n&#8211; dotnet cli<br \/>\n\u6240\u7528\u5230\u7684\u547d\u4ee4\u6709\u4ee5\u4e0b\u4e24\u4e2a<br \/>\n&#8211; Add-Migration Xxxxx<br \/>\n&#8211; Update-Database<br \/>\n\u6bd4\u5982\u5728PM\u4e2d\u8f93\u5165\u4ee5\u4e0b\u6307\u4ee4\uff1a<\/p>\n<pre><code class=\"language-CSharp line-numbers\"> Add-Migration InitialDB\n<\/code><\/pre>\n<p>\u4f1a\u5728\u9879\u76ee\u4e2d\u751f\u6210Migrations\u6587\u4ef6\u5939\uff0c\u5e76\u5728\u5176\u4e2d\u751f\u6210InitialDB.cs\u548cSnapshot.cs\u7684\u6587\u4ef6<br \/>\n\u5728PM\u4e2d\u8f93\u5165Update-Database -Verbose<br \/>\n\u4f1a\u66f4\u65b0\u6570\u636e\u5e93<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Contents1 \u6570\u636e\u5e932 SQLLocalDB2.1 \u547d\u4ee4\u884c\u67e5\u8be23 \u5728VS\u4e2d\u67e5\u770bSqllocaldb4 \u5728 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[44,4,2],"tags":[],"class_list":["post-1070","post","type-post","status-publish","format-standard","hentry","category-asp-net-core","category-c","category-2"],"_links":{"self":[{"href":"https:\/\/www.wayln.com\/index.php?rest_route=\/wp\/v2\/posts\/1070","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wayln.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wayln.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wayln.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wayln.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1070"}],"version-history":[{"count":16,"href":"https:\/\/www.wayln.com\/index.php?rest_route=\/wp\/v2\/posts\/1070\/revisions"}],"predecessor-version":[{"id":1086,"href":"https:\/\/www.wayln.com\/index.php?rest_route=\/wp\/v2\/posts\/1070\/revisions\/1086"}],"wp:attachment":[{"href":"https:\/\/www.wayln.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1070"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wayln.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1070"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wayln.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1070"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}