{"id":61139,"date":"2024-10-13T08:45:16","date_gmt":"2024-10-13T00:45:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/61139\/"},"modified":"2024-10-13T08:45:17","modified_gmt":"2024-10-13T00:45:17","slug":"delphi%e6%8a%80%e5%b7%a7%ef%bc%9a%e8%bc%95%e9%ac%86%e8%a7%a3%e6%b1%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e7%95%b0%e5%b8%b8%e6%8a%93%e5%8f%96-delphi%e6%8a%93%e6%95%b8%e6%93%9a%e5%ba%ab%e7%95%b0%e5%b8%b8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/61139\/","title":{"rendered":"Delphi\u6280\u5de7\uff1a\u8f15\u9b06\u89e3\u6c7a\u6578\u64da\u5eab\u7570\u5e38\u6293\u53d6 (delphi\u6293\u6578\u64da\u5eab\u7570\u5e38)"},"content":{"rendered":"

Delphi\u6280\u5de7\uff1a\u8f15\u9b06\u89e3\u6c7a\u6578\u64da\u5eab\u7570\u5e38\u6293\u53d6<\/h1>\n

\u5728\u958b\u767c\u61c9\u7528\u7a0b\u5f0f\u6642\uff0c\u6578\u64da\u5eab\u7684\u7570\u5e38\u6293\u53d6\u662f\u4e00\u500b\u5e38\u898b\u7684\u6311\u6230\u3002\u4f7f\u7528Delphi\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u958b\u767c\u8005\u9700\u8981\u6709\u6548\u5730\u8655\u7406\u5404\u7a2e\u7570\u5e38\uff0c\u4ee5\u78ba\u4fdd\u61c9\u7528\u7a0b\u5f0f\u7684\u7a69\u5b9a\u6027\u548c\u7528\u6236\u9ad4\u9a57\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728Delphi\u4e2d\u8f15\u9b06\u89e3\u6c7a\u6578\u64da\u5eab\u7570\u5e38\u6293\u53d6\u7684\u6280\u5de7\u3002<\/p>\n

\u7406\u89e3\u6578\u64da\u5eab\u7570\u5e38<\/h2>\n

\u6578\u64da\u5eab\u7570\u5e38\u901a\u5e38\u662f\u7531\u65bc\u591a\u7a2e\u539f\u56e0\u5f15\u8d77\u7684\uff0c\u5305\u62ec\u9023\u63a5\u554f\u984c\u3001\u67e5\u8a62\u932f\u8aa4\u3001\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\u7b49\u3002\u9019\u4e9b\u7570\u5e38\u53ef\u80fd\u6703\u5c0e\u81f4\u61c9\u7528\u7a0b\u5f0f\u5d29\u6f70\u6216\u6578\u64da\u640d\u58de\uff0c\u56e0\u6b64\uff0c\u958b\u767c\u8005\u9700\u8981\u63d0\u524d\u505a\u597d\u6e96\u5099\uff0c\u59a5\u5584\u8655\u7406\u9019\u4e9b\u60c5\u6cc1\u3002<\/p>\n

\u4f7f\u7528Try-Except\u7d50\u69cb<\/h2>\n

\u5728Delphi\u4e2d\uff0c\u6700\u5e38\u7528\u7684\u7570\u5e38\u8655\u7406\u65b9\u6cd5\u662f\u4f7f\u7528Try-Except\u7d50\u69cb\u3002\u9019\u7a2e\u7d50\u69cb\u5141\u8a31\u958b\u767c\u8005\u6355\u7372\u7570\u5e38\u4e26\u57f7\u884c\u76f8\u61c9\u7684\u8655\u7406\u908f\u8f2f\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n

try\n  \/\/ \u5617\u8a66\u57f7\u884c\u6578\u64da\u5eab\u64cd\u4f5c\n  DatabaseConnection.Open;\n  Query.SQL.Text := 'SELECT * FROM Users';\n  Query.Open;\nexcept\n  on E: Exception do\n  begin\n    \/\/ \u6355\u7372\u7570\u5e38\u4e26\u986f\u793a\u932f\u8aa4\u4fe1\u606f\n    ShowMessage('\u6578\u64da\u5eab\u64cd\u4f5c\u51fa\u932f: ' + E.Message);\n  end;\nend;<\/code><\/pre>\n
\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u7576\u6578\u64da\u5eab\u64cd\u4f5c\u51fa\u73fe\u7570\u5e38\u6642\uff0c\u7a0b\u5e8f\u4e0d\u6703\u5d29\u6f70\uff0c\u800c\u662f\u6703\u986f\u793a\u4e00\u689d\u932f\u8aa4\u4fe1\u606f\uff0c\u8b93\u7528\u6236\u77e5\u9053\u767c\u751f\u4e86\u4ec0\u9ebc\u554f\u984c\u3002<\/p>\n
\u8a18\u9304\u7570\u5e38\u4fe1\u606f<\/h2>\n
\u9664\u4e86\u986f\u793a\u932f\u8aa4\u4fe1\u606f\uff0c\u8a18\u9304\u7570\u5e38\u4fe1\u606f\u4e5f\u662f\u4e00\u500b\u826f\u597d\u7684\u7fd2\u6163\u3002\u9019\u6a23\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u5728\u5f8c\u671f\u9032\u884c\u6545\u969c\u6392\u67e5\u3002\u53ef\u4ee5\u4f7f\u7528Delphi\u7684\u65e5\u8a8c\u5eab\u4f86\u8a18\u9304\u7570\u5e38\u4fe1\u606f\uff1a<\/p>\n
uses\n  SysUtils, Classes, LogFile;\n\nprocedure LogError(const Msg: string);\nvar\n  Log: TLogFile;\nbegin\n  Log := TLogFile.Create('error.log');\n  try\n    Log.Add(Msg);\n  finally\n    Log.Free;\n  end;\nend;\n\ntry\n  \/\/ \u5617\u8a66\u57f7\u884c\u6578\u64da\u5eab\u64cd\u4f5c\nexcept\n  on E: Exception do\n  begin\n    LogError('\u6578\u64da\u5eab\u64cd\u4f5c\u51fa\u932f: ' + E.Message);\n    ShowMessage('\u6578\u64da\u5eab\u64cd\u4f5c\u51fa\u932f\uff0c\u8a73\u60c5\u5df2\u8a18\u9304\u3002');\n  end;\nend;<\/code><\/pre>\n
\u4f7f\u7528\u81ea\u5b9a\u7fa9\u7570\u5e38\u985e\u578b<\/h2>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u958b\u767c\u8005\u53ef\u80fd\u9700\u8981\u5275\u5efa\u81ea\u5b9a\u7fa9\u7570\u5e38\u985e\u578b\uff0c\u4ee5\u4fbf\u66f4\u597d\u5730\u63cf\u8ff0\u7279\u5b9a\u7684\u932f\u8aa4\u60c5\u6cc1\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n
type\n  EDatabaseError = class(Exception);\n\nprocedure ExecuteQuery;\nbegin\n  \/\/ \u5047\u8a2d\u9019\u88e1\u6709\u4e00\u500b\u6578\u64da\u5eab\u64cd\u4f5c\n  if not DatabaseConnection.Connected then\n    raise EDatabaseError.Create('\u6578\u64da\u5eab\u672a\u9023\u63a5');\nend;\n\ntry\n  ExecuteQuery;\nexcept\n  on E: EDatabaseError do\n    ShowMessage('\u81ea\u5b9a\u7fa9\u7570\u5e38: ' + E.Message);\nend;<\/code><\/pre>\n
\u7d50\u8ad6<\/h2>\n
\u5728Delphi\u4e2d\u8655\u7406\u6578\u64da\u5eab\u7570\u5e38\u662f\u78ba\u4fdd\u61c9\u7528\u7a0b\u5f0f\u7a69\u5b9a\u6027\u7684\u91cd\u8981\u6b65\u9a5f\u3002\u901a\u904e\u4f7f\u7528Try-Except\u7d50\u69cb\u3001\u8a18\u9304\u7570\u5e38\u4fe1\u606f\u4ee5\u53ca\u5275\u5efa\u81ea\u5b9a\u7fa9\u7570\u5e38\u985e\u578b\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u548c\u89e3\u6c7a\u6578\u64da\u5eab\u7570\u5e38\u554f\u984c\u3002\u9019\u4e0d\u50c5\u80fd\u63d0\u9ad8\u7528\u6236\u9ad4\u9a57\uff0c\u9084\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u5728\u672a\u4f86\u7684\u7dad\u8b77\u4e2d\u66f4\u5feb\u5730\u5b9a\u4f4d\u554f\u984c\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u7a0b\u5f0f\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f \u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u638c\u63e1Delphi\u6280\u5de7\uff0c\u8f15\u9b06\u89e3\u6c7a\u6578\u64da\u5eab\u7570\u5e38\u6293\u53d6\u554f\u984c\uff0c\u63d0\u5347\u958b\u767c\u6548\u7387\uff0c\u78ba\u4fdd\u6578\u64da\u6e96\u78ba\u6027\u8207\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-61139","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61139","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=61139"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61139\/revisions"}],"predecessor-version":[{"id":61140,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61139\/revisions\/61140"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=61139"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=61139"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=61139"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}