{"id":2524,"date":"2025-05-21T21:56:03","date_gmt":"2025-05-21T13:56:03","guid":{"rendered":"http:\/\/www.jh1999.cn\/?p=2524"},"modified":"2025-05-21T22:29:59","modified_gmt":"2025-05-21T14:29:59","slug":"parameters%e7%9a%84%e5%8a%a8%e6%80%81%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"http:\/\/www.jh1999.cn\/?p=2524","title":{"rendered":"Parameters\u7684\u52a8\u6001\u5e94\u7528"},"content":{"rendered":"
\n\n

\u5728\u6570\u636e\u5e93\u5e94\u7528\u7cfb\u7edf\u4e2d\uff0c\u7ecf\u5e38\u6709\u9ad8\u9891\u67e5\u8be2\u7684\u9700\u6c42\uff0c\u5373\u6bcf\u6b21\u67e5\u8be2\u63d0\u53d6\u7684\u6570\u636e\u7ed3\u6784\u76f8\u540c\uff0c\u53c2\u4e0e\u8fc7\u6ee4\u7684\u680f\u4f4d\u4e5f\u4e0d\u53d8\uff0c\u53ea\u662f\u6bcf\u6b21\u8fc7\u6ee4\u7684\u6761\u4ef6\u503c\u4e0d\u540c\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cADOQuery1.Parameters.ParamByName(‘F1’)\u7684\u6027\u80fd\u8868\u73b0\u6700\u4f73\u3002<\/p>\n\n\n\n

\u4e0e\u52a8\u6001\u4fee\u6539WHERE\u5b50\u53e5 \u6765\u5b9e\u73b0\u8fc7\u6ee4\u76f8\u6bd4\uff0cParameters\u6709\u4e0b\u5217\u4f18\u52bf\uff1a<\/p>\n\n\n\n

    \n
  1. \u907f\u514d SQL \u89e3\u6790\u5f00\u9500\uff1a\u6570\u636e\u5e93\u4f1a\u7f13\u5b58\u53c2\u6570\u5316\u67e5\u8be2\u7684\u6267\u884c\u8ba1\u5212\uff0c\u591a\u6b21\u6267\u884c\u65f6\u65e0\u9700\u91cd\u65b0\u89e3\u6790 SQL \u8bed\u6cd5\u3002<\/li>\n\n\n\n
  2. \u9632\u6b62 SQL \u6ce8\u5165\uff1a\u53c2\u6570\u5316\u67e5\u8be2\u81ea\u52a8\u5904\u7406\u503c\u7684\u8f6c\u4e49\uff0c\u5b89\u5168\u6027\u66f4\u9ad8\u3002<\/li>\n\n\n\n
  3. \u6267\u884c\u9632\u9519\uff1a\u53c2\u6570\u503c\u4f1a\u6309\u6307\u5b9a\u7c7b\u578b\u4f20\u9012\uff0c\u51cf\u5c11\u7c7b\u578b\u8f6c\u6362\u9519\u8bef\u3002<\/li>\n<\/ol>\n\n\n\n

    \u52a8\u6001\u8c03\u6574ADOQuery1.Parameters\uff0c\u4e25\u683c\u6309\u4e0b\u8ff0\u6b65\u9aa4\u5f00\u53d1\uff0c\u786e\u4fdd\u65e0\u5fe7\uff1a<\/p>\n\n\n\n

    \u4e00\u3001\u5728\u8bbe\u8ba1\u754c\u9762\u7ed9ADOQuery1\u914d\u7f6e\u4e24\u4e2aparameters\uff1aF1\u548cF2\uff0c\u76f8\u6bd4\u628a\u53c2\u6570\u5199\u5728\u4ee3\u7801\u4e2d\u66f4\u53ef\u9760\u3002<\/p>\n\n\n\n

    \u4e8c\u3001ADOQuery1\u7684\u9759\u6001SQL\u4e2d\uff0c\u4e0d\u8981\u5305\u542b\u53c2\u6570\uff0c\u53e6\u5916\u7528\u5168\u5c40\u53d8\u91cfsFixSql\u6682\u5b58\u9759\u6001SQL\u8bed\u53e5\u3002sFixSql:=qMaster.SQL.Text;<\/p>\n\n\n\n

    \u4e09\u3001\u5b9e\u6d4bADOQuery1\u7684SQL\u4e2d\u65e0\u53c2\u6570\uff0c\u4f46\u8bbe\u8ba1\u754c\u9762\u914d\u7f6e\u4e86\u53c2\u6570\uff0c\u6253\u5f00ADOQuery1\u6b63\u5e38\uff01\u4e14\u5168\u90e8\u663e\u793a\u3002<\/p>\n\n\n\n

    \u56db\u3001\u6267\u884c\u67e5\u8be2\u65f6\u52a8\u6001\u5957\u53c2\u6570\u7684\u4ee3\u7801\uff0cqMaster\u662fADOQuery\u5b9e\u4f8b\uff0csField1\u548csField2\u662f\u53c2\u4e0e\u8fc7\u6ee4\u7684\u4e24\u4e2a\u680f\u4f4d\uff0ccbbFilt1\u548ccbbFilt2\u662f\u4e24\u4e2a\u4e0b\u62c9\u9009\u62e9\u6846\uff0c\u7528\u6237\u9009\u62e9\u4e0d\u540c\u503c\u8fdb\u884c\u67e5\u8be2\u3002<\/p>\n\n\n\n

    procedure TfmsoChengpin.btnFindClick(Sender: TObject);\nvar\n  sValue:String;\nbegin\n  inherited;\n  qMaster.Close;\n  qMaster.Filtered:=false;\n  qMaster.SQL.Text:=sFixSql;\n  if cbbFilt1.ItemIndex > 0 then\n    qMaster.SQL.Text:=qMaster.SQL.Text+' and ('+sField1+' =:F1) '\n  else\n    qMaster.SQL.Text:=qMaster.SQL.Text+' and ('+sField1+' =:F1 or 1=1) ';\n  if cbbFilt2.ItemIndex > 0 then\n    qMaster.SQL.Text:=qMaster.SQL.Text+' and ('+sField2+' =:F2) '\n  else\n    qMaster.SQL.Text:=qMaster.SQL.Text+' and ('+sField2+' =:F2 or 1=1) ';\n  sValue:=cbbFilt1.Text;\n  sValue:=copy(sValue,1,pos('--',sValue)-1);\n  qMaster.Parameters[0].Value:=sValue;\n  sValue:=cbbFilt2.Text;\n  sValue:=copy(sValue,1,pos('--',sValue)-1);\n  qMaster.Parameters[1].Value:=sValue;\n  qMaster.Open;\nend;<\/code><\/pre>\n\n\n
    \n
    \"\"<\/figure>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"
    \u5728\u6570\u636e\u5e93\u5e94\u7528\u7cfb\u7edf\u4e2d\uff0c\u7ecf\u5e38\u6709\u9ad8\u9891\u67e5\u8be2\u7684\u9700\u6c42\uff0c\u5373\u6bcf\u6b21\u67e5\u8be2\u63d0\u53d6\u7684\u6570\u636e\u7ed3\u6784\u76f8\u540c\uff0c\u53c2\u4e0e\u8fc7\u6ee4\u7684\u680f\u4f4d\u4e5f\u4e0d\u53d8\uff0c\u53ea\u662f\u6bcf\u6b21\u8fc7\u6ee4\u7684\u6761 … \u9605\u8bfb\u66f4\u591a<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-2524","post","type-post","status-publish","format-standard","hentry","category-kfbj"],"_links":{"self":[{"href":"http:\/\/www.jh1999.cn\/index.php?rest_route=\/wp\/v2\/posts\/2524","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.jh1999.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.jh1999.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.jh1999.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.jh1999.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2524"}],"version-history":[{"count":7,"href":"http:\/\/www.jh1999.cn\/index.php?rest_route=\/wp\/v2\/posts\/2524\/revisions"}],"predecessor-version":[{"id":2533,"href":"http:\/\/www.jh1999.cn\/index.php?rest_route=\/wp\/v2\/posts\/2524\/revisions\/2533"}],"wp:attachment":[{"href":"http:\/\/www.jh1999.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2524"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.jh1999.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2524"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.jh1999.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2524"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}