{"id":2155,"date":"2015-03-18T17:00:54","date_gmt":"2015-03-18T09:00:54","guid":{"rendered":"http:\/\/blog.qdac.cc\/?p=2155"},"modified":"2015-03-18T17:00:54","modified_gmt":"2015-03-18T09:00:54","slug":"qdataset-%e4%bb%8e%e5%8f%a6%e4%b8%80%e4%b8%aa%e6%95%b0%e6%8d%ae%e9%9b%86%e4%b8%ad%e5%90%88%e5%b9%b6%e5%86%85%e5%ae%b9%e5%88%b0%e5%bd%93%e5%89%8d%e6%95%b0%e6%8d%ae%e9%9b%86","status":"publish","type":"post","link":"https:\/\/blog.qdac.cc\/?p=2155","title":{"rendered":"QDataSet &#8211; \u4ece\u53e6\u4e00\u4e2a\u6570\u636e\u96c6\u4e2d\u5408\u5e76\u5185\u5bb9\u5230\u5f53\u524d\u6570\u636e\u96c6"},"content":{"rendered":"<p>QDataSet \u63d0\u4f9b\u4e86\u4e00\u4e2a Merge \u51fd\u6570\u7528\u4e8e\u5c06\u4e00\u4e2a\u6570\u636e\u96c6\u4e2d\u7684\u6570\u636e\u5408\u5e76\u5230\u5df2\u6709\u7684\u6570\u636e\u96c6\u4e2d\u3002\u5229\u7528\u5b83\uff0c\u53ef\u4ee5\u5b9e\u73b0\u6e10\u8fdb\u5f0f\u5237\u65b0\u6570\u636e\u7684\u6548\u679c\uff1a<\/p>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u53ef\u4ee5\u53d6\u4e00\u90e8\u5206\u6570\u636e\u663e\u793a\u7ed9\u7528\u6237\uff0c\u7136\u540e\u5728\u7528\u6237\u9700\u8981\u65f6\uff0c\u518d\u53d6\u4e00\u90e8\u5206\u6570\u636e\uff0c\u7136\u540e\u5408\u5e76\u5230\u524d\u9762\u7684\u7ed3\u679c\u96c6\u4e2d\u663e\u793a\u7ed9\u7528\u6237\uff0c\u8fd9\u6837\u5b50\u5c31\u53ef\u4ee5\u5b9e\u73b0\u6570\u636e\u7684\u589e\u91cf\u5408\u5e76\u3002<\/p>\n<p>\u6211\u4eec\u6765\u770b\u4e0b\u51fd\u6570\u58f0\u660e\uff1a<\/p>\n<pre class=\"lang:delphi decode:true \">function Merge(const ACmdText: QStringW; AType: TQDataMergeMethod;AWaitDone: Boolean): Boolean; overload;\r\nprocedure Merge(ASource: TQDataSet; AType: TQDataMergeMethod;ACheckDeleted: Boolean = False); overload;\r\nprocedure Union(ASource: TQDataSet; AUnionAll: Boolean = False); overload;\r\n<\/pre>\n<p>\u8fd9\u91cc\u63d0\u4f9b\u4e86\u4e09\u4e2a\u51fd\u6570\uff1a<\/p>\n<p>\u7b2c\u4e00\u4e2a Merge \u51fd\u6570\u7528\u4e8e\u6267\u884c\u4e00\u4e2a\u811a\u672c\u6765\u83b7\u53d6\u8981\u5408\u5e76\u7684\u6570\u636e\uff0c\u7136\u540e\u5c06\u6570\u636e\u5408\u5e76\u5230\u5f53\u524d\u7ed3\u679c\u96c6\u4e2d\u3002AWaitDone \u53c2\u6570\u5982\u679c\u4e3a True\uff0c\u5219\u4f1a\u7b49\u5f85\u811a\u672c\u6267\u884c\u6210\u529f\uff0c\u8fd4\u56de\u7ed3\u679c\u96c6\u540e\u6267\u884c\u5408\u5e76\u64cd\u4f5c\uff0c\u5982\u679c\u4e3a False\uff0c\u5219\u4f1a\u5c1d\u8bd5\u5f02\u6b65\u6267\u884c\u811a\u672c\u5e76\u8fd4\u56de\u7ed3\u679c\u96c6\u3002\u5728\u5f02\u6b65\u6267\u884c\u6210\u529f\u5e76\u8fd4\u56de\u7ed3\u679c\u96c6\u540e\uff0c\u518d\u6267\u884c\u5408\u5e76\u64cd\u4f5c\u3002<\/p>\n<p>\u7b2c\u4e8c\u4e2a Merge \u51fd\u6570\u7528\u4e8e\u76f4\u63a5\u4ece ASource \u8fd9\u4e2a\u6570\u636e\u96c6\u4e2d\u5408\u5e76\u6570\u636e\u3002<\/p>\n<p>\u7b2c\u4e09\u4e2a Union \u51fd\u6570\u5b9e\u9645\u4e0a\u8c03\u7528\u7684\u662f\u7b2c\u4e8c\u4e2a Merge \u51fd\u6570\uff0c\u5982\u679c AUnionAll \u4e3a True\uff0c\u5219\u7b49\u4ef7\u4e8e Merge(ASource,dmmAppend,False)\uff0c\u5426\u5219\uff0c\u7b49\u4ef7\u4e8e Merge(ASource,dmmMerge,False)\u3002<\/p>\n<p>\u6211\u4eec\u91cd\u70b9\u6765\u8bf4\u7b2c\u4e8c\u4e2a\u51fd\u6570\u7684\u53c2\u6570\uff1a<\/p>\n<ul>\n<li>ASource : \u8981\u5408\u5e76\u5230\u5f53\u524d\u6570\u636e\u96c6\u4e2d\u7684\u6e90\u6570\u636e\u96c6\uff0c\u5b83\u7684\u5404\u4e2a\u5b57\u6bb5\u548c\u7c7b\u578b\u5e94\u5408\u5f53\u524d\u7ed3\u679c\u96c6\u4fdd\u6301\u4e00\u81f4\u3002<\/li>\n<li>AType : \u5408\u5e76\u65b9\u5f0f\uff0c\u6709\u4e09\u79cd\uff1a\n<ul>\n<li>dmmAppend : \u8ffd\u52a0\u6a21\u5f0f\uff0c\u76f4\u63a5\u5c06 ASource \u7684\u6570\u636e\u65e0\u6761\u4ef6\u7684\u8ffd\u52a0\u5230\u5f53\u524d\u7ed3\u679c\u96c6\u4e2d<\/li>\n<li>dmmReplace : \u66ff\u6362\u6a21\u5f0f\uff0c\u6e05\u7a7a\u5f53\u524d\u7684\u7ed3\u679c\u96c6\u4e2d\u5df2\u6709\u7684\u5185\u5bb9\uff0c\u7136\u540e\u5c06 ASource \u7684\u5185\u5bb9\u8ffd\u52a0\u8fdb\u5f53\u524d\u7ed3\u679c\u96c6<\/li>\n<li>dmmMerge : \u5408\u5e76\u6a21\u5f0f\uff0c\u5ffd\u7565\u6389 ASource \u4e2d\u5728\u5f53\u524d\u7ed3\u679c\u96c6\u4e2d\u5df2\u5b58\u5728\u7684\u8bb0\u5f55<\/li>\n<\/ul>\n<\/li>\n<li>ACheckDeleted : \u5728 dmmMerge \u6a21\u5f0f\u65f6\u662f\u5426\u68c0\u67e5\u5f53\u524d\u7ed3\u679c\u96c6\u4e2d\u5df2\u7ecf\u5220\u9664\u7684\u8bb0\u5f55\uff0c\u4e00\u822c\u6211\u4eec\u53d6 False\u3002<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>QDataSet \u63d0\u4f9b\u4e86\u4e00\u4e2a Merge [&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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