{"id":2424,"date":"2021-10-06T00:55:45","date_gmt":"2021-10-05T16:55:45","guid":{"rendered":"https:\/\/www.develop-note.com\/blog\/?p=2424"},"modified":"2022-02-16T17:29:34","modified_gmt":"2022-02-16T09:29:34","slug":"dapper","status":"publish","type":"post","link":"https:\/\/www.develop-note.com\/blog\/2021\/10\/06\/dapper\/","title":{"rendered":"D-09 \u8cc7\u6599\u5eab\u5b58\u53d6 ? Dapper"},"content":{"rendered":"

\u600e\u9ebc\u8655\u7406\u8cc7\u6599\u5eab\u6e9d\u901a<\/h1>\n

\u76f8\u4fe1\u9019\u9ede\u662f\u6bcf\u500b\u7a0b\u5f0f\u958b\u767c\u5de5\u7a0b\u5e2b\u95dc\u6ce8\u7684\u9ede\uff0c\u5728dotnetcore\u4e2d\u53ef\u4ee5\u9078\u64c7EntityFramework\u6216\u662f\u7528ADO.NET\u4f86\u8655\u7406\u8cc7\u6599\u5eab\u554f\u984c\uff0c\u4e0d\u904e\u4eca\u5929\u8981\u4ecb\u7d39\u7684\u662f\u7fbd\u91cf\u7d1a\u7684\u5957\u4ef6Dapper\uff0c\u8acb\u5927\u5bb6\u7e7c\u7e8c\u770b\u4e0b\u53bb\u3002<\/p>\n

<\/p>\n

\u5982\u4f55\u8655\u7406\u8cc7\u6599\u5eab\u6e9d\u901a<\/h2>\n

\u300c\u524d\u8f29\uff0c\u6211\u8981\u958b\u59cb\u641e\u8cc7\u6599\u5eab\u4e86\uff0c\u6211\u8a72\u5f9e\u54ea\u88e1\u8457\u624b\u300d
\n\u4e00\u65e9\u5927\u982d\u53c8\u6709\u9700\u6c42\u4e0a\u7684\u554f\u984c\uff0c\u4eca\u5929\u4f3c\u4e4e\u662f\u8ddf\u8cc7\u6599\u5eab\u76f8\u95dc\u7684\u554f\u984c\uff0c\u7531\u65bc\u5c0f\u5149\u4e5f\u66fe\u7d93\u6709\u985e\u4f3c\u7684\u554f\u984c\uff0c\u6240\u4ee5\u4e5f\u60f3\u66b8\u89e3\u8a72\u5982\u4f55\u8655\u7406\u3002
\n\u300c\u90a3\u4f60\u6709\u4ec0\u9ebc\u9700\u6c42\u5462\uff1f\u300d
\n\u8001K\u807d\u5230\u5927\u982d\u7684\u554f\u984c\u4e4b\u5f8c\u53cd\u554f\u4ed6\u9019\u500b\u554f\u984c\uff0c\u9019\u6642\u5927\u982d\u6b6a\u4e86\u982d\u60f3\u4e86\u4e00\u4e0b\uff0c\u5c31\u9019\u9ebc\u8aaa\u3002
\n\u300c\u6211\u60f3\u8981\u5beb\u4e00\u500b\u8655\u7406\u901f\u5ea6\u5feb\u53c8\u53ef\u4ee5\u7c21\u55ae\u5beb\u7684\u300d
\n\u807d\u5230\u9019\u56de\u7b54\u5f8c\u63db\u8001K\u601d\u8003\u4e86\u5e7e\u5206\u9418\u5f8c\u9019\u9ebc\u8aaa\u3002
\n\u300c\u90a3\u4f60\u8ddf\u5c0f\u5149\u53bb\u7814\u7a76\u4e00\u4e0bDapper\u300d<\/p>\n

Dapper<\/h2>\n

Dapper<\/a>\u662f\u4e00\u500b\u91dd\u5c0d\u95dc\u806f\u662f\u8cc7\u6599\u8868\u4f86\u8655\u7406\u6548\u80fd\u512a\u5316\u7684\u5957\u4ef6\uff0c\u800c\u4e14\u4f7f\u7528\u4e0a\u4e5f\u4e0d\u50cfADO.NET\u8981\u7d93\u904e\u7e41\u7463\u7684\u52d5\u4f5c\u624d\u53ef\u4ee5\u89e3\u6790\u8cc7\u6599\u5eab\u7684\u8cc7\u6599\uff0c\u800c\u4e14\u4f7f\u7528\u4e0a\u76f8\u7576\u7c21\u55ae\uff0c\u4e0d\u904e\u5728\u9032\u5165\u6559\u5b78\u524d\u5148\u4f86\u770b\u4e00\u4e0b\u74b0\u5883\u8a2d\u5b9a\u7684\u90e8\u5206\u3002<\/p>\n

\u74b0\u5883\u8a2d\u5b9a<\/h3>\n

\u9996\u5148\u8981\u5b89\u88dd\u7684\u5957\u4ef6\u5982\u4e0b\u5217\u547d\u4ee4\u5217\u3002<\/p>\n

dotnet add package Dapper\ndotnet add package System.Data.SqlClient<\/code><\/pre>\n
\u9019\u908a\u8aaa\u660e\u4e00\u4e0b\uff0c\u4e0a\u9762\u662f\u5b89\u88ddDapper\u800c\u4e0b\u9762\u5b89\u88dd\u7684\u662fMsSql\u7684\u9023\u63a5\u7a0b\u5f0f\uff0c\u6240\u4ee5\u4e4b\u5f8c\u5148\u8aaa\u660e\u5982\u4f55\u8ddfMsSql\u9023\u7dda\u3002<\/p>\n
\u9023\u7dda\u8655\u7406<\/h3>\n
\u9019\u908a\u6211\u5011\u662f\u900f\u904eDbProviderFactories<\/code>\u4f86\u53d6\u5f97\u5c0d\u61c9\u7684\u9023\u7dda\u5de5\u5177\uff0c\u4ee5\u76ee\u524d\u4f8b\u5b50\u4f86\u8aaa\u5c0d\u65bcMsSql\u5c31\u662f\u8981\u6307\u5b9aSystem.Data.SqlClient<\/code>\u3002<\/p>\n
var providerFactory = DbProviderFactories.GetFactory(ProviderName);\nvar connection = providerFactory.CreateConnection();\nif (connection != null)\n{\n    connection.ConnectionString = connectionString;\n}\n\nreturn connection;<\/code><\/pre>\n
\u4e0d\u904e\u4e26\u4e0d\u662f\u9019\u6a23\u5c31\u53ef\u4ee5\u4e86\uff0c\u6211\u5011\u5fc5\u9808\u5728\u7a0b\u5f0f\u958b\u59cb\u524d\u5148\u8a3b\u518a\u624d\u884c\uff0c\u6240\u4ee5\u5728Program.Main<\/code>\u57f7\u884c\u4ee5\u4e0b\u52d5\u4f5c\u3002<\/p>\n
DbProviderFactories.RegisterFactory("System.Data.SqlClient", System.Data.SqlClient.SqlClientFactory.Instance);<\/code><\/pre>\n
\u63a5\u4e0b\u4f86\u8981\u6ce8\u610f\u7684\u662f\uff0c\u4f7f\u7528\u9023\u7dda\u4e32\u7684\u8a9e\u53e5\u6642\u8981\u7528using\u628a\u4ed6\u5305\u8d77\u4f86\uff0c\u7c21\u55ae\u8b1b\u5c31\u662f\u505a\u5b8c\u67e5\u8a62\u5f8c\u8981\u91cb\u653e\u6389\uff0c\u9019\u6a23MsSql\u7684\u9023\u7dda\u624d\u6703\u900f\u904e\u9023\u7dda\u6c60\u7684\u7ba1\u7406\uff0c\u8a73\u7d30\u7684\u8cc7\u8a0a\u53ef\u4ee5\u770b\u4e00\u4e0b\u9019\u7bc7[SQL Connection Pooling \u884c\u70ba\u89c0\u5bdf<\/a>]\u3002<\/p>\n
using (var connection = await GetConnection("\u9023\u7dda\u4e32"))\n{\n    var sql = @"SELECT GETUTCDATE()";\n    result = await connection.QueryFirstOrDefaultAsync<DateTime>(sql);\n}<\/code><\/pre>\n
\u81f3\u65bc\u9023\u7dda\u4e32\u7684\u90e8\u5206\u53ef\u4ee5\u900f\u904e\u4e4b\u524d\u4ecb\u7d39\u7684\u8a2d\u5b9a\u6a94\u4f86\u53d6\u7684\u5373\u53ef\u3002<\/p>\n
\u57f7\u884c\u8a9e\u6cd5<\/h3>\n
\u5176\u4e0a\u5728\u4e0a\u9762\u7684\u7bc4\u4f8b\u7a2e\u5df2\u7d93\u770b\u5230\u57f7\u884c\u8a9e\u6cd5\u4e86\uff0c\u53ea\u8981\u719f\u6089Linq\u7684\u8a9e\u53e5\u61c9\u8a72\u5c31\u5982\u4f55\u4f7f\u7528\u4e86\uff0c\u518d\u4f86\u5c31\u662f\u5f8c\u8d05\u8a5e\u6709Async<\/code>\u6307\u7684\u5c31\u662f\u975e\u540c\u6b65\u7684\u65b9\u6cd5\uff0c\u6240\u4ee5\u5982\u679c\u8981\u7b49\u5f85\u5b8c\u6210\u7684\u8a71\u524d\u9762\u8981\u8a18\u7684\u52a0\u4e0aawait<\/code>\uff0c\u6700\u5f8c\u6cdb\u578b\u7684\u90e8\u5206\u5c31\u662f\u8981\u8f49\u578b\u6210\u751a\u9ebc\u985e\u5225\u3002
\n\u5982\u679c\u6709\u9700\u8981\u50b3\u5165\u53c3\u6578\u7684\u8a71\u5c31\u900f\u904e\u4ee5\u4e0b\u65b9\u5f0f\u4f86\u50b3\u905e\u3002<\/p>\n
public class Dog\n{\n    public int? Age { get; set; }\n    public Guid Id { get; set; }\n    public string Name { get; set; }\n    public float? Weight { get; set; }\n\n    public int IgnoredProperty { get { return 1; } }\n}\n\nvar guid = Guid.NewGuid();\nvar dog = connection.Query<Dog>("select Age = @Age, Id = @Id", new { Age = (int?)null, Id = guid });<\/code><\/pre>\n
\u4e0d\u904e\u9019\u908a\u8981\u6ce8\u610f\u4e00\u4e0b\u95dc\u65bc\u4f7f\u7528\u5230\u6307\u5b9a\u9577\u5ea6\u7684\u5b57\u4e32\uff0cDapper\u7684\u57f7\u884c\u6703\u5f71\u97ff\u57f7\u884c\u8a08\u756b\uff0c\u8a73\u7d30\u8acb\u770b\u9019\u7bc7Dapper \u7528\u8d77\u4f86\u5f88\u53cb\u5584\uff0c\u4f46\u662f\u9810\u8a2d\u7684\u53c3\u6578\u578b\u5225\u5c0d\u57f7\u884c\u8a08\u5283\u4e0d\u592a\u53cb\u5584\u3002<\/a>\uff0c\u6240\u4ee5\u5728\u8f38\u5165\u5b57\u4e32\u6642\u8981\u6ce8\u610f\u8f38\u5165\u7684\u503c\u8ddf\u8cc7\u6599\u5eab\u5b9a\u7fa9\u7684\u503c\u4e00\u81f4\uff0c\u5982\u4e0b\u6240\u793a\u3002<\/p>\n
await connection.QueryFirstOrDefaultAsync<PlayInfo>(sql,\nnew\n{\n    Name = new DbString { Value = name, Length = 32 }\n}<\/code><\/pre>\n
\u7c21\u55ae\u8aaa\u660e\u5c31\u662f\u4f7f\u7528DbString<\/code>\u9019\u985e\u5225\u5373\u53ef\uff0c\u81f3\u65bc\u7d30\u90e8\u8cc7\u8a0a\u8acb\u770b\u524d\u9762\u90a3\u4e00\u7bc7\u3002<\/p>\n
\u6b04\u4f4d\u5c0d\u61c9<\/h3>\n
\u7576\u7136\u985e\u5225\u7684\u5c6c\u6027\u540d\u7a31\u672a\u5fc5\u6703\u8ddf\u8cc7\u6599\u5eab\u7684\u6b04\u4f4d\u76f8\u7b26\uff0c\u6240\u4ee5\u9019\u908a\u53ef\u4ee5\u900f\u904e\u4ee5\u4e0b\u65b9\u6cd5\u4f86\u5c07\u5c6c\u6027\u540d\u7a31\u5c0d\u61c9\u5230\u8cc7\u6599\u5eab\u6b04\u4f4d\uff0c\u9996\u5148\u5148\u5b89\u88dd\u4ee5\u4e0b\u5957\u4ef6Dapper.FluentMap<\/a>\u3002<\/p>\n
dotnet add package Dapper.FluentMap<\/code><\/pre>\n
\u63a5\u4e0b\u4f86\u5efa\u7acb\u5c0d\u61c9\u7684\u985e\u5225\u3002<\/p>\n
public class ProductMap : EntityMap<Product>\n{\n    public ProductMap()\n    {\n        \/\/ Map property 'Name' to column 'strName'.\n        Map(p => p.Name)\n            .ToColumn("strName");\n\n        \/\/ Ignore the 'LastModified' property when mapping.\n        Map(p => p.LastModified)\n            .Ignore();\n    }\n}<\/code><\/pre>\n
\u5982\u679c\u9019\u908a\u4e0d\u5728\u4e4e\u6b04\u4f4d\u5927\u5c0f\u5beb\u7684\u8a71\u53ef\u4ee5\u7528\u4ee5\u4e0b\u8a9e\u6cd5\u3002<\/p>\n
Map(p => p.Name).ToColumn("strName", caseSensitive: false)<\/code><\/pre>\n
\u5efa\u7acb\u597d\u5c0d\u61c9\u7684\u985e\u5225\u5f8c\u518d\u5c07\u4ed6\u8a3b\u518a\u9032\u53bb\u5373\u53ef\uff0c\u8a3b\u518a\u7684\u65b9\u6cd5\u8981\u5728Startup.ConfigureServices<\/code>\u52a0\u4e0a\u4ee5\u4e0b\u8a9e\u6cd5\u5373\u53ef\u3002<\/p>\n
FluentMapper.Initialize(cfg =>\n{\n    cfg.AddMap(new ProductMap());\n});<\/code><\/pre>\n
\u5f8c\u8a18<\/h2>\n
\u4eca\u5929\u8ddf\u5c0f\u5149\u9084\u6709\u5927\u982d\u8a8d\u8b58\u5982\u4f55\u8655\u7406\u9023\u7dda\u554f\u984c\uff0c\u5df2\u7d93\u5982\u4f55\u4f7f\u7528Dapper\u4f86\u57f7\u884c\u8cc7\u6599\u5eab\u8a9e\u6cd5\u4ee5\u53ca\u8cc7\u6599\u5eab\u6b04\u4f4d\u8ddf\u985e\u5225\u5c6c\u6027\u7684\u5c0d\u61c9\u554f\u984c\uff0c\u5e0c\u671b\u5c0d\u5927\u5bb6\u5728\u8cc7\u6599\u5eab\u7684\u8655\u7406\u53ef\u4ee5\u5feb\u901f\u958b\u767c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u600e\u9ebc\u8655\u7406\u8cc7\u6599\u5eab\u6e9d\u901a \u76f8\u4fe1\u9019\u9ede\u662f\u6bcf\u500b\u7a0b\u5f0f\u958b\u767c\u5de5\u7a0b\u5e2b\u95dc\u6ce8\u7684\u9ede\uff0c\u5728dotnetcore\u4e2d\u53ef\u4ee5\u9078\u64c7EntityFram … <\/p>\n
\u95b1\u8b80\u5168\u6587\u3008D-09 \u8cc7\u6599\u5eab\u5b58\u53d6 ? Dapper\u3009<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[2],"tags":[90,138,92],"class_list":["post-2424","post","type-post","status-publish","format-standard","hentry","category-develop","tag-2021ironman","tag-dapper","tag-dotnetcore"],"_links":{"self":[{"href":"https:\/\/www.develop-note.com\/blog\/wp-json\/wp\/v2\/posts\/2424","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.develop-note.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.develop-note.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.develop-note.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.develop-note.com\/blog\/wp-json\/wp\/v2\/comments?post=2424"}],"version-history":[{"count":19,"href":"https:\/\/www.develop-note.com\/blog\/wp-json\/wp\/v2\/posts\/2424\/revisions"}],"predecessor-version":[{"id":2932,"href":"https:\/\/www.develop-note.com\/blog\/wp-json\/wp\/v2\/posts\/2424\/revisions\/2932"}],"wp:attachment":[{"href":"https:\/\/www.develop-note.com\/blog\/wp-json\/wp\/v2\/media?parent=2424"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.develop-note.com\/blog\/wp-json\/wp\/v2\/categories?post=2424"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.develop-note.com\/blog\/wp-json\/wp\/v2\/tags?post=2424"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}