{"id":3055,"date":"2015-11-11T16:03:14","date_gmt":"2015-11-11T08:03:14","guid":{"rendered":"http:\/\/blog.qdac.cc\/?p=3055"},"modified":"2015-11-12T08:59:22","modified_gmt":"2015-11-12T00:59:22","slug":"qdb-%e4%bd%bf%e7%94%a8-tqconverter-%e7%9b%b4%e6%8e%a5%e5%b0%86%e6%95%b0%e6%8d%ae%e6%b5%81%e4%bb%8e%e4%b8%80%e7%a7%8d%e6%a0%bc%e5%bc%8f%e8%bd%ac%e6%8d%a2%e4%b8%ba%e5%8f%a6%e4%b8%80%e7%a7%8d%e6%a0%bc","status":"publish","type":"post","link":"https:\/\/blog.qdac.cc\/?p=3055","title":{"rendered":"[QDB] \u4f7f\u7528 TQConverter \u76f4\u63a5\u5c06\u6570\u636e\u6d41\u4ece\u4e00\u79cd\u683c\u5f0f\u8f6c\u6362\u4e3a\u53e6\u4e00\u79cd\u683c\u5f0f"},"content":{"rendered":"<p>TQConverter \u65b0\u589e\u4e86SaveToConverter \/ LoadFromConverter \u65b9\u6cd5\u6765\u7b80\u5316\u6570\u636e\u6d41\u683c\u5f0f\u7684\u8f6c\u6362\uff0c\u652f\u6301\u4ece\u6d41\u4e2d\u548c\u6587\u4ef6\u4e2d\u8f6c\u6362\u6570\u636e\u683c\u5f0f\u540e\u4fdd\u5b58\u5230\u53e6\u4e00\u4e2a\u6d41\u6216\u6587\u4ef6\u4e2d\u3002<\/p>\n<p>\u4e0b\u9762\u7684\u793a\u4f8b\u4ee3\u7801\u6f14\u793a\u4e86\uff1a<\/p>\n<ol>\n<li>\u5c06\u5f53\u524d FDataSet \u6570\u636e\u96c6\u7684\u5185\u5bb9\u4f7f\u7528 TQBinaryConverter \u6765\u4fdd\u5b58\u5230 ASourceStream \u4e2d\uff08 QDB \u539f\u751f\u7684\u4e8c\u8fdb\u5236\u683c\u5f0f \uff09\u3002<\/li>\n<li>\u5c06 ASourceStream \u7684\u5185\u5bb9\uff0c\u901a\u8fc7\u8c03\u7528 TBinaryConverter .SaveToConverter \u65b9\u6cd5\uff0c\u901a\u8fc7\u00a0TQMSSQLConverter \u8f6c\u6362\u5668\uff0c\u4fdd\u5b58\u5230 SQL \u811a\u672c\u6570\u636e\u6d41 \u00a0ATargetStream \u4e2d\u3002<\/li>\n<li>\u5c06 \u00a0ATargetStream \u4e2d\u7684\u6570\u636e\u6d41\u901a\u8fc7 LoadTextW \u51fd\u6570\u52a0\u8f7d\u5e76\u663e\u793a\u5230 Memo1 \u4e2d\uff0c\u5448\u73b0\u7ed9\u7528\u6237\u3002<\/li>\n<\/ol>\n<pre class=\"lang:delphi decode:true\">var\r\n  ASource, ADest: TQConverter;\r\n  ASourceStream,ADestStream: TStream;\r\n  I: Integer;\r\nbegin\r\n  \/\/\u521b\u5efa\u8f6c\u6362\u5668\u548c\u6d41\u5bf9\u8c61\r\n  ASource := TQBinaryConverter.Create(nil);\r\n  ADest := TQMSSQLConverter.Create(nil);\r\n  TQMSSQLConverter(ADest).AllAsInsert := True;\r\n  ASourceStream := TMemoryStream.Create;\r\n  ADestStream:=TMemoryStream.Create;\r\n  try\r\n    \/\/\u4fdd\u5b58\u6e90\u6570\u636e\u5230\u6d41\u4e2d\uff0c\u505a\u4e3a\u6d4b\u8bd5\u8f6c\u6362\u683c\u5f0f\u7684\u6570\u636e\u4e00\u4e2a\u6765\u6e90\uff0c\u5b9e\u9645\u4f7f\u7528\u65f6\u6e90\u5e94\u8be5\u662f\u4e00\u4e2a\u5df2\u5b58\u5728\u7684\u6587\u4ef6\u6216\u6d41\r\n    ASource.SaveToStream(FDataSet, ASourceStream);\r\n    ASourceStream.Position := 0;\r\n    \/\/\u4f7f\u7528 ASource.SaveToConverter \u6216 ADest.LoadFromConverter \u6765\u5b8c\u6210\u683c\u5f0f\u8f6c\u6362\r\n    ASource.SaveToConverter(ADest,ASourceStream,ADestStream);\r\n    \/\/\u5c06\u8f6c\u6362\u751f\u6210\u7684SQL\u52a0\u8f7d\u5230Memo\u91cc\u663e\u793a     \r\n    ADestStream.Position:=0;\r\n    Memo1.Lines.Text := LoadTextW(ADestStream);\r\n  finally\r\n    FreeAndNil(ASource);\r\n    FreeAndNil(ADest);\r\n    FreeAndNil(ASourceStream);\r\n    FreeAndNil(ADestStream);\r\n  end;<\/pre>\n<p>\u4e0a\u9762\u7684\u4ee3\u7801\uff0c\u5b9e\u9645\u4e0a\u9664\u53bb\u51c6\u5907\u6d41\u6570\u636e\u548c\u663e\u793a\u90a3\u5757\uff0c\u53ea\u7528\u4e86\u4e00\u53e5\u8bdd<\/p>\n<blockquote><p>ASource.SaveToConverter(ADest,ASourceStream,ADestStream);<\/p><\/blockquote>\n<p>\u5c31\u5b8c\u6210\u4e86\u683c\u5f0f\u7684\u8f6c\u6362\u3002\u5f53\u7136\uff0c\u5982\u679c\u4f60\u60f3\u76f4\u63a5\u8f6c\u6362\u5230\u6587\u4ef6\uff0c\u7b80\u5355\u7684\u5c06\u4e0a\u9762\u7684\u6d41\u6362\u6210\u6587\u4ef6\u540d\u5373\u53ef\u3002\u6211\u4eec\u6765\u8be6\u7ec6\u4e86\u89e3\u4e0b TQConverter \u7684 LoadFromConverter \u548c SaveToConverter \u65b9\u6cd5\u3002<\/p>\n<pre class=\"lang:delphi decode:true \">procedure LoadFromConverter(AConverter: TQConverter;ASourceStream, ATargetStream: TStream); overload;\r\nprocedure LoadFromConverter(AConverter: TQConverter;ASourceFile, ATargetFile: QStringW); overload;\r\nprocedure LoadFromConverter(AConverter: TQConverterClass;SourceStream, ATargetStream: TStream); overload;\r\nprocedure LoadFromConverter(AConverter: TQConverterClass;ASourceFile, ATargetFile: QStringW); overload;\r\n\r\nprocedure SaveToConverter(AConverter: TQConverter;ASourceStream, ATargetStream: TStream); overload;\r\nprocedure SaveToConverter(AConverter: TQConverter;ASourceFile, ATargetFile: QStringW); overload;\r\nprocedure SaveToConverter(AConverter: TQConverterClass;ASourceStream, ATargetStream: TStream); overload;\r\nprocedure SaveToConverter(AConverter: TQConverterClass;ASourceFile, ATargetFile: QStringW); overload;<\/pre>\n<p>\u5b9e\u9645\u4e0a\uff0c\u4e24\u4e2a\u51fd\u6570\u6211\u4eec\u53ef\u4ee5\u8ba4\u4e3a\u5b83\u662f\u9006\u8fd0\u7b97 ConverterA.LoadFromConverter(ConverterB) \u7b49\u4ef7\u4e8e ConverterB.SaveToConverter(ConverterA)\uff0c\u5185\u90e8\u7684\u5b9e\u73b0\u5b9e\u9645\u6700\u7ec8\u4e5f\u6307\u5411\u4e86\u540c\u4e00\u4e2a\u51fd\u6570\uff0c\u5c01\u88c5\u6210\u4e0d\u540c\u7684\u63a5\u53e3\u662f\u4e3a\u4e86\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u6613\u7528\u6027\u3002\u54b1\u4eec\u5bf9\u51fd\u6570\u7684\u58f0\u660e\u4ee5 SaveToConverter \u6765\u8bf4\u660e\uff1a<\/p>\n<ul>\n<li>AConverter : \u4e00\u4e2a\u8f6c\u6362\u5668\u5b9e\u4f8b\u6216\u7c7b\u578b\u3002\u533a\u522b\u5728\u4e8e\u5982\u679c\u4f7f\u7528\u8f6c\u6362\u5668\u5b9e\u4f8b\uff0c\u5219\u4f60\u53ef\u4ee5\u9884\u5148\u8c03\u8282\u8f6c\u6362\u5668\u7684\u53c2\u6570\uff0c\u4ece\u800c\u63a7\u5236\u8f93\u51fa\u5230\u76ee\u6807\u6570\u636e\u6d41\u4e2d\u7684\u6570\u636e\u5185\u5bb9\u3001\u683c\u5f0f\u3001\u8fdb\u5ea6\u7b49\u7b49\uff0c\u800c\u4f7f\u7528\u7c7b\u578b\u7684\u8bdd\uff0c\u4f60\u53ea\u80fd\u91c7\u7528\u9ed8\u8ba4\u53c2\u6570\u4e86\uff08\u8fd9\u4e0d\u5e9f\u8bdd\u561b~~~\uff09<\/li>\n<li>ASourceStream\/ASourceFile : \u6e90\u6570\u636e\u6d41\u6216\u6587\u4ef6\u540d\u3002\u6e90\u6570\u636e\u6d41\u6216\u6587\u4ef6\u5185\u5bb9\u5fc5\u9700\u662f\u6e90\u8f6c\u6362\u5668\u7684\u683c\u5f0f\uff0c\u800c\u4e0d\u662f\u76ee\u6807\u8f6c\u6362\u5668\u7684\u683c\u5f0f\u3002<\/li>\n<li>ATargetStream\/ATargetFile : \u76ee\u6807\u6570\u636e\u6d41\u6216\u6587\u4ef6\u540d\u3002\u6587\u4ef6\u65f6\uff0c\u5982\u679c\u76ee\u6807\u6587\u4ef6\u4e0d\u5b58\u5728\uff0c\u4f1a\u81ea\u52a8\u521b\u5efa\uff0c\u5982\u679c\u5b58\u5728\uff0c\u4f1a\u81ea\u52a8\u8986\u76d6\uff0c\u63d0\u793a\u662f\u5426\u8986\u76d6\u662f\u4e0a\u5c42\u8c03\u7528\u8005\u7684\u8d23\u4efb\u3002<\/li>\n<\/ul>\n<p>\u597d\u4e86\uff0c\u7ed3\u679c\u51fa\u6765\u4e86\uff1a<\/p>\n<p><a href=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2015\/11\/directconverter.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-3056\" src=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2015\/11\/directconverter.jpg\" alt=\"directconverter\" width=\"423\" height=\"299\" srcset=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2015\/11\/directconverter.jpg 423w, https:\/\/blog.qdac.cc\/wp-content\/uploads\/2015\/11\/directconverter-300x212.jpg 300w\" sizes=\"auto, (max-width: 423px) 100vw, 423px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>TQConverter \u65b0\u589e\u4e86SaveT [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[69,8,9,66],"tags":[57],"class_list":["post-3055","post","type-post","status-publish","format-standard","hentry","category-c-builder","category-delphi","category-qdac","category-qdb","tag-57"],"views":5629,"_links":{"self":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/3055","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3055"}],"version-history":[{"count":4,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/3055\/revisions"}],"predecessor-version":[{"id":3061,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/3055\/revisions\/3061"}],"wp:attachment":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3055"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3055"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3055"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}