X++双向关联查询数据，初始化下拉选项

static client void lookupInfuseBOMId(FormStringControl _ctrl,ItemId _itemId)

{

//传入要查询的表
SysTableLookup sysTableLookup = SysTableLookup::newParameters(tablenum(BomTable), _ctrl);
Query query;
QueryBuildDataSource queryBuildDataSource;
QueryBuildDataSource queryBuildDataSourceSite;
QueryBuildDataSource qbdBomVersion;

QueryBuildRange queryBuildRange;
QueryBuildRange qbrVesionRange;
;
query = new Query();

queryBuildDataSource = query.addDataSource(tablenum(BomTable));

qbdBomVersion=queryBuildDataSource.addDataSource(tablenum(BomVersion));
qbdBomVersion.joinMode(JoinMode::ExistsJoin);
qbdBomVersion.addLink(fieldnum(BomTable,BomId),fieldnum(BomVersion,BomId));

queryBuildDataSourceSite = qbdBomVersion.addDataSource(tablenum(JaxBomType));
queryBuildDataSourceSite.joinMode(JoinMode::ExistsJoin);
queryBuildDataSourceSite.addLink(fieldnum(BomVersion,JaxBoMTypeId ), fieldnum(JaxBomType, JaxBoMTypeId));

queryBuildRange=queryBuildDataSourceSite.addRange(fieldnum(JaxBomType,isInfuseWax));
queryBuildRange.value(QueryValue(NoYes::Yes));

qbrVesionRange=qbdBomVersion.addRange(fieldnum(BomVersion,ItemId));
qbrVesionRange.value(_itemId);

//初始化要显示的栏位

sysTableLookup.addLookupfield(fieldnum(BomTable, BomId));
sysTableLookup.addLookupfield(fieldnum(BomTable, Name));
sysTableLookup.addLookupfield(fieldnum(BomTable, SiteId));
sysTableLookup.addLookupfield(fieldnum(BomTable, ItemGroupId));
sysTableLookup.addLookupfield(fieldnum(BomTable, JaxBOMTypeId));
sysTableLookup.addLookupfield(fieldnum(BomTable, JaxGoldContentId));
sysTableLookup.addLookupfield(fieldnum(BomTable, JaxStoneTypeId));
sysTableLookup.addLookupfield(fieldnum(BomTable, JaxPartsTypeId));
sysTableLookup.addLookupfield(fieldnum(BomTable, JaxEditionId));

//return sysTableLookup;
sysTableLookup.parmQuery(query);
sysTableLookup.performFormLookup();
}

调用位置，

重写数据源的lookup方法

public void lookup(FormControl _formControl, str _filterStr)
{
//super(_formControl, _filterStr);
;
BOMTable::lookupInfuseBOMId(_formControl,BOMVersion.ItemId);
}

用户在使用下拉列表的时候就会调用此方法