var
findcity:mapxlib_tlb.findfeature;
ds:mapxlib_tlb.dataset;
lyr:mapxlib_tlb.layer;
begin
lyr:=map1.Layers.Item[2];
ds:=map1.DataSets.Add(miDatasetLayer,lyr,emptyparam,emptyparam, emptyparam,emptyparam,emptyparam,emptyparam);
lyr.Find.finddataset:=ds;
lyr.Find.FindField:=ds.Fields.Item['roadid'] ; //限定查找字段
findcity:=lyr.find.search(edit_roadid.text,emptyparam);
if(findcity.FindRc mod 10 = 1) then // 精确查找
begin
map1.ZoomTo(map1.Zoom, findcity.CenterX,findcity.CenterY);
lyr.Selection.Replace(findcity); //高亮显示；
end
else showmessage('没找到');
end;