ALV.ppt优质

03/01/2519:27ABAPListViewer03/01/2519:27•Thecommonfeaturesofreportarecolumnalignment,sorting,filtering,subtotals,totalsetc.Toimplementthese,alotofcodingandlogicistobeput.ToavoidthatwecanuseaconceptcalledABAPListViewer(ALV).•UsingALV,wecanhavethreetypesofreports:1.SimpleReport2.BlockReport3.HierarchicalSequentialReportINTRODUCTION03/01/2519:27Therearesomefunctionmoduleswhichwillenabletoproducetheabovereportswithoutmucheffort.Allthedefinitionsofinternaltables,structuresandconstantsaredeclaredinatype-poolcalledSLIS.03/01/2519:27SIMPLEREPORT1.SimpleReportTheimportantfunctionmodulesare:Reuse_alv_list_display输出列表（画线形式）Reuse_alv_fieldcatalog_merge转换成输出结构Reuse_alv_events_getReuse_alv_commentary_writeReuse_alv_grid_display输出网格03/01/2519:27SIMPLEREPORTCONTD….A.REUSE_ALV_LIST_DISPLAY:Thisisthefunctionmodulewhichprintsthedata.Theimportantparametersare:1.Export:a.I_callback_program:reportidb.I_callback_pf_status_set:routinewhereausercansethisownpfstatusorchangethefunctionalityoftheexistingpfstatus.c.I_callback_user_command:routinewherethefunctioncodesarehandled.03/01/2519:27SIMPLEREPORTCONTD...d.I_structurename:nameofthedictionarytablee.Is_Layout:structuretosetthelayoutofthereportf.It_fieldcat:internaltablewiththelistofallfieldsandtheirattributeswhicharetobeprinted(thistablecanbepopulatedautomaticallybythefunctionmoduleREUSE_ALV_FIELDCATALOG_MERGE)g.It_events:internaltablewithalistofallpossibleeventsofALVandtheircorrespondingroutinenames.2.Tables:a.t_outtab:internaltablewiththedatatobeoutput03/01/2519:27SIMPLEREPORTCONTD...B.REUSE_ALV_FIELDCATALOG_MERGE:ThisfunctionmoduleisusedtopopulateafieldcatalogwhichisessentialtodisplaythedatainALV.Iftheoutputdataisfromasingledictionarytableandallthecolumnsareselected,thenweneednotexclusivelycreatethefieldcatalog.Itsenoughtomentionthetablenameasaparameter(I_structure_name)intheREUSE_ALV_LIST_DISPLAY.Butinothercasesweneedtocreateit.03/01/2519:27SIMPLEREPORTCONTD...Theimportantparametersare:1.Export:a.I_program_name:reportidb.I_internal_tabname:theinternaloutputtablec.I_inclname:includeorthereportnamewhereallthedynamicformsarehandled.2.Changingct_fieldcat:aninternaltablewiththetypeSLIS_T_FIELDCAT_ALVwhichisdeclaredinthetypepoolSLIS.03/01/2519:27SIMPLEREPORTCONTD...C.REUSE_ALV_EVENTS_GET:Returnstableofpossibleeventsforaalisttype1.Import:Et_Events:TheeventtableisreturnedwithallpossibleCALLBACKeventsforthespecifiedlisttype(column‘NAME’).ForeventstobeprocessedbytheCallback,their‘FORM’fieldmustbefilled.Ifthefieldisinitialized,theeventisignored.Theentrycanbereadfromtheeventtable,thefield‘FORM’filledandtheentrymodifiedusingconstantsfromthetypepoolSLIS.03/01/2519:27SIMPLEREPORTCONTD...2.Export:I_list_type:0=simplelist1=hierarchical-sequentiallist2=simpleblocklist3=hierarchical-sequentialblocklist03/01/2519:27SIMPLEREPORTCONTD...D.REUSE_ALV_COMMENTARY_WRITE:ThisisusedintheTop-of-pageeventtoprinttheheadingsandothercommentsforthelist.1.It_list_commentary:Internaltablewiththeheadingsofthetypeslis_t_listheader.Thisinternaltablehasthreefields:Typ:‘H’-header,‘S’-selection,‘A’-actionKey:onlywhentypis‘S’.Info:thetexttobeprinted03/01/2519:27SIMPLEREPORTCONTD...E.REUSE_ALV_GRID_DISPLAY:Anewfunctionin4.6version,todisplaytheresultsingridratherthanasalist.Parameters:sameasreuse_alv_list_display03/01/2519:27Theexampleofas...