Flutter Textformfield search receives data but does not display other data - flutter

Question

This is my search code. It works by typing id the codes to display the information.
onSearch(String text) async {
if (text.isNotEmpty) {
List<Item> itemList = [];
for (var item in items) {
if (item.custnum == text.toLowerCase().toUpperCase()) {
itemList.add(item);
}
}
setState(() {
searchitems.clear();
searchitems.addAll(itemList);
print('name : ${searchitems[0].name}');
// if (searchitems.isEmpty) {
// searchitems = [];
// print('searchitems : ${searchitems[0].address!.length}');
// print('searchitems : ${searchitems[0].address!}');
});
} else {
setState(() {
searchCus.clear();
searchitems.clear();
// searchitems.addAll(items);
print('searchitems : $searchitems');
});
}
}
This is my textformfield, it can find and display data. But what I will do is Getting a code from another page It's received and shows the code. But it doesn't show me the information. It has to delete and type at least 1 new password to show the information. Please help me i tried a lot.
TextFormField(
initialValue:
'${searchCus.isEmpty ? "" : searchCus[widget.indexCus].custnum}',
onChanged: onSearch,
decoration: InputDecoration(
labelText: 'custnum',
labelStyle: TextStyle(fontFamily: 'supermarket', fontSize: 14),
isDense: true,
),
),

Answer 1

The reason the initial value not do the search is that you search logic is only works when you type in the textfield, if your initial value come from class constructor you can call onSearch in initState like this:
#override
void initState() {
super.initState();
if(searchCus.isNotEmpty){
onSearch(searchCus[widget.indexCus].custnum);
}
}