delphi中ADODATASET的CURSORLOCATION和CURSORTYPE和LUCKTYPE的关系

carnivalcarnival 2008-09-18 10:38:24

如果CURSORLOCATION为clUseClient

那么CURSORTYPE只能为ctStatic
这个时候,是不是LUCKTYPE是什么都无所谓了?因为只有自已一个人使用本地的记录集了.
另请高手指导三者之间如何搭配.

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JeffChung 2008-09-18

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http://bbs.verycd.com/index.php?automodule=blog&blogid=10344&showentry=22264

内存泄漏 2008-09-18

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你到底是要实现什么功能？？

panrongzeng 2008-09-18

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平時沒怎么注意這兩個屬性，一般默認就好了。
還是問一句，你需要什么功能？出現了什么錯誤？

Delphi 7.1 Update Release Notes=======================================================This file contains important supplemental and late-breakinginformation that may not appear in the main productdocumentation, and supersedes information contained in otherdocuments, including previously installed release notes.Borland recommends that you read this file in its entirety.NOTE: If you are updating a localized version of Delphi 7, visit the Borland Registered User web site to obtain a localized readme file that may contain important late- breaking information not included in this readme file.IMPORTANT: Delphi must be closed before installing this update. =====================================================CONTENTS * INSTALLING THIS UPDATE * UPDATING LOCALIZED VERSIONS OF DELPHI 7 * KNOWN ISSUES * ISSUES ADDRESSED BY THIS UPDATE - IDE - CORE DATABASE - DATASNAP - DBGO (ADO COMPONENTS) - dbExpress - dbExpress COMPONENTS AND DB VCL - dbExpress CORE DRIVER AND METADATA - dbExpress VENDOR ISSUES - dbExpress CERTIFICATION - WEB SNAP - ACTIVEX - COMPILER - RTL - VCL - THIRD PARTY - BOLD FOR DELPHI * VERIFYING THAT THE UPDATE WAS SUCCESSFUL * FILES INSTALLED BY THIS UPDATE =======================================================INSTALLING THIS UPDATE* This update can not be applied to Delphi 7 Architect Trial version. * This update can not be removed after it is installed.* You will need the original Delphi 7 installation CD available to install this update.* To install this update from the CD, insert the CD, and launch the d7_ent_upd1.exe file appropriate for your locale.* To install this update from the Web, double-click the self-executing installation file and follow the prompts. * The Delphi 7 documentation PDF files are available on the update CD.========================================================UPDATING LOCALIZED VERSIONS OF DELPHI 7* This update can be applied only to the English version of Delphi 7. There are separate updates for the German, French and Japanese ver

看过好多主从数据表更新保存的操作，都不能解决我遇到的问题，问题是这样的：
主从表结构，设置两个表的
CursorType: ctKeyset，
CursorLocation: clUseClient，
LockType: ltBatchOptimistic
然后用MasterField关联起来两表，在新增一个单据时，主表输入数据，从表输入数据，
当保存时，原来我的保存是这样的：
if not DM.ADOConnectio

ADO游标(ADO Cursors) 我们已经了解了如何使用几个数据访问组件来连接Access数据库并检索数据。有一项可以肯定：ADOExpress组件非常适用于基于ADO数据访问和元数据对象映射。 ADO的核心是记录集对象（Recordset）。 Recordset对象（又称为DataSet数据集）是查询命令执行后的结果（例如，TADOQuery组件的SELECT语句）。当一个基于ADO

2.5万条数据。加载数据集速度对比： clientdataset MemTableEh kbmMemTable dxMemData 656 984 1062 1359 656 1016 1031 1344 625 1031 1031 1343 645.6666667 1010.333333 104

Delphi(Pascal) code var sqlStr:String;begin sqlStr:= ' begin ' sqlStr:= sqlStr+ 'update table1 set col1 = ''test'' where 1=2;'; sqlStr:= sqlStr+ 'update table1 set col1 = ''test2'' where 1=2;'; ...

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