Datasnap basic example, simple service, the client reads data to achieve the three-tier structure

DataSnap xe2\Client\Client.dpr
............\......\Client.dproj
............\......\Client.dproj.local
............\......\Client.identcache
............\......\Client.res
............\......\Project1.identcache
............\......\Project1.res
............\......\Unit1.dfm
............\......\Unit1.pas
............\......\Win32\Debug\CalculatorEh.dcu
............\......\.....\.....\Client.exe
............\......\.....\.....\DBAxisGridsEh.dcu
............\......\.....\.....\DBCtrlsEh.dcu
............\......\.....\.....\DBGridEh.dcu
............\......\.....\.....\DBGridEhFindDlgs.dcu
............\......\.....\.....\DBGridEhGrouping.dcu
............\......\.....\.....\DBGridEhImpExp.dcu
............\......\.....\.....\DBGridEhSimpleFilterDlg.dcu
............\......\.....\.....\DBGridEhToolCtrls.dcu
............\......\.....\.....\DBGridFilterDropDownFormsEh.dcu
............\......\.....\.....\DBLookupGridsEh.dcu
............\......\.....\.....\DBLookupUtilsEh.dcu
............\......\.....\.....\DBSumLst.dcu
............\......\.....\.....\DbUtilsEh.dcu
............\......\.....\.....\DropDownFormEh.dcu
............\......\.....\.....\DynVarsEh.dcu
............\......\.....\.....\EhLibConsts.dcu
............\......\.....\.....\EhLibVCL.dcu
............\......\.....\.....\EhLibXmlConsts.dcu
............\......\.....\.....\FilterDropDownFormsEh.dcu
............\......\.....\.....\GridsEh.dcu
............\......\.....\.....\GridToolCtrlsEh.dcu
............\......\.....\.....\IndyCore160.bpl
............\......\.....\.....\IndyProtocols160.bpl
............\......\.....\.....\IndySystem160.bpl
............\......\.....\.....\IPIndyImpl160.bpl
............\......\.....\.....\MemoEditFormsEh.dcu
............\......\.....\.....\MemTableDataEh.dcu
............\......\.....\.....\MemTreeEh.dcu
............\......\.....\.....\PictureEditFormsEh.dcu
............\......\.....\.....\Project1.exe
............\......\.....\.....\PropFilerEh.dcu
............\......\.....\.....\RichEditFormsEh.dcu
............\......\.....\.....\ToolCtrlsEh.dcu
............\......\.....\.....\Unit1.dcu
............\......\__history\Client.dpr.~1~
............\......\.........\Project1.dpr.~1~
............\......\.........\Unit1.dfm.~10~
............\......\.........\Unit1.dfm.~11~
............\......\.........\Unit1.dfm.~12~
............\......\.........\Unit1.dfm.~13~
............\......\.........\Unit1.dfm.~14~
............\......\.........\Unit1.dfm.~15~
............\......\.........\Unit1.dfm.~6~
............\......\.........\Unit1.dfm.~7~
............\......\.........\Unit1.dfm.~8~
............\......\.........\Unit1.dfm.~9~
............\......\.........\Unit1.pas.~1~
............\......\.........\Unit1.pas.~2~
............\......\.........\Unit1.pas.~3~
............\......\.........\Unit1.pas.~4~
............\ProjectGroup1.groupproj
............\ProjectGroup1.groupproj.local
............\Server\Project1.identcache
............\......\Project1.res
............\......\Server.dpr
............\......\Server.dproj
............\......\Server.dproj.local
............\......\Server.identcache
............\......\Server.res
............\......\ServerContainerUnit1.dfm
............\......\ServerContainerUnit1.pas
............\......\ServerMethodsUnit1.dfm
............\......\ServerMethodsUnit1.pas
............\......\Unit1.dfm
............\......\Unit1.pas
............\......\Win32\Debug\Project1.exe
............\......\.....\.....\Server.exe
............\......\.....\.....\ServerContainerUnit1.dcu
............\......\.....\.....\ServerMethodsUnit1.dcu
............\......\.....\.....\Unit1.dcu
............\......\__history\Project1.dpr.~1~
............\......\.........\Server.dpr.~1~
............\......\.........\ServerContainerUnit1.dfm.~1~
............\......\.........\ServerContainerUnit1.dfm.~2~
............\......\.........\ServerContainerUnit1.dfm.~3~
............\......\.........\ServerContainerUnit1.pas.~1~
............\......\.........\ServerContainerUnit1.pas.~2~
............\......\.........\ServerMethodsUnit1.dfm.~1~
............\......\........

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