Get.to(GetHomePage()); // diğer sayfaya gider

Get.off(GetHomePage()); // bulunduğum sayfayı siler ve gider

Get.offAll(GetHomePage()); // her sayfayı siler ve gider

Get.back(); // geri gider

Get.to(GetHomePage(),arguments:"Hello World!"); // değer yollama
Get.back(result: "Hello world"); // result olarak geri değer yollar

GetMaterialApp(

  home: Home(),

  getPages: [

    GetPage(name: '/', page: () => Home()),

    GetPage(name: '/second', page: () => Second()),

    GetPage(name: '/third', page: () => Third()),

    GetPage(name: "/fourth", page: () => Fourth()),

  ],

);

2. Then After we can use simple method as per below :

Get.toNamed("/second");

Also we can pass an arguments with Named Navigator as per below example :

Get.toNamed("/fourth", arguments: "Hello World!");

import 'package:get/get.dart';

class GetxArtan extends GetxController{
  var sayi =0.obs;
  GetxArtan(){
    print("burası çalıştı ");
  }
}

var getxArtan = Get.put(GetxArtan()); // hafızadakini alır

//var getxArtan = new GetxArtan(); // hafızadakini almaz

Obx(() => Text(getxArtan.sayi.value.toString()))

onPressed: () {
 getxArtan.sayi.value++;
},

import 'package:get/get.dart';
import 'KategorilerApi.dart';
import 'KategorilerModel.dart';

class GetxKategori extends GetxController{
  var kategoriModel  = <KategorilerModel>[].obs;
  var verilerGeldimi = false.obs;
  void kategoriYukle(){
    KategorilerApi api = new KategorilerApi();
    api.getKategoriler().then((value) {
      kategoriModel.value=value;
      verilerGeldimi.value=true;
    });
  }
}

var getxKategori = Get.put(GetxKategori());

@override
void initState() {
  super.initState();
  getxKategori.kategoriYukle();
}

@override
Widget build(BuildContext context) {
  return Scaffold(
      appBar: AppBar(
        title: Text("Başlık"),
      ),
      body: Container(
        child: GetX<GetxKategori>(
          builder: (controller) {
            return controller.verilerGeldimi.value==false?Center(child: CircularProgressIndicator(),): ListView.builder(
                itemCount: controller.kategoriModel.value.length,
                itemBuilder: (context, index) {
                  var model = controller.kategoriModel.value[index];
                  return Container(
                    height: 50,
                    child: Card(
                      child: Text(model.ad!),
                    ),
                  );
                });
          },
        ),
      ));
}

body: Container(
  child: GetBuilder<GetxKategori>( // GetBuilder kullanırsan update yapmak zorundasın
    builder: (controller){
      if(controller.verilerGeldimi==false) return Container();
      return Text(controller.kategoriModel.value[0].ad!);
    },
  ),

body: Container(
  child: GetX<GetxKategori>( // GetBuilder kullanırsan update yapmak zorundasın
    builder: (controller){
      if(controller.verilerGeldimi==false) return Container();
      return Text(controller.kategoriModel.value[0].ad!);
    },
  ),

import 'package:get/get.dart';
import 'KategorilerApi.dart';
import 'KategorilerModel.dart';

class GetxKategori extends GetxController{
  var kategoriModel  = <KategorilerModel>[].obs;
  var verilerGeldimi = false.obs;
  void kategoriYukle(){
    KategorilerApi api = new KategorilerApi();
    api.getKategoriler().then((value) {
      kategoriModel.value=value;
      verilerGeldimi.value=true;
      update(); // GetBuilder için eklendi
    });
  }
}

Obx(
  () {
    return Container(
        child: GridView.builder(
            itemCount: getxKategori.urunModels.value.length,
            gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
                mainAxisExtent: 60, crossAxisCount: 2),
            itemBuilder: (context, index) {
              var model = getxKategori.urunModels.value[index];

              return Card(
                child: Column(
                  children: [
                    Text(model.urunAdiTr!),
                    Expanded(
                        child: Image.memory(
                      Base64Decoder().convert(model.urunResim!),
                      height: 150,
                      fit: BoxFit.fill,
                    )),
                  ],
                ),
              );
            }));
  },
)

import 'package:get/get.dart';

class UrunModel2 extends GetxController{
  var urunAdiTr="".obs;
  String? urunResim;
  var sayac=0.obs;

  UrunModel2({required this.urunAdiTr, this.urunResim});

  UrunModel2.fromJson(Map<String, dynamic> json) {
    urunAdiTr.value = json['Urun_AdiTr'];
    urunResim = json['Urun_Resim'];
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    data['Urun_AdiTr'] = this.urunAdiTr.obs;
    data['Urun_Resim'] = this.urunResim;
    return data;
  }
}

body: Obx(
  () {
    return Container(
        child: GridView.builder(
            itemCount: getxKategori.urunModels.value.length,
            gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
                mainAxisExtent: 120, crossAxisCount: 2),
            itemBuilder: (context, index) {
              var model = getxKategori.urunModels.value[index];

              print(index);
              return Card(
                child: Column(
                  children: [
                    Obx(() => Text(model.urunAdiTr.value),),
                    Expanded(
                        child: Image.memory(
                      Base64Decoder().convert(model.urunResim!),
                      height: 150,
                      fit: BoxFit.fill,
                    )),
                    Expanded(
                        child: ElevatedButton(
                      onPressed: () {
                        model.sayac.value++;
                        model.urunAdiTr.value = model.urunAdiTr.value + " a";
                      },
                      child: Obx(() => Text("Ekle " + model.sayac.value.toString())),
                    ))
                  ],
                ),
              );
            }));
  },

class GetxKategori extends GetxController{
    var urunModels  = <UrunModel2>[].obs;
 

void urunYukle(){
  KategorilerApi api = new KategorilerApi();
  api.getUruns().then((value) {
    urunModels.value=value;
      });
}

}

Future<List<UrunModel2>> getUruns() async {
  var path ="/api/Kategoriler/getUruns";
  var uri = Uri.http(apiBaseIrl,path);
  var header = {
    'Content-Type':'application/json:charset=UTF-8'
  };
  return http.post(uri,headers: header,).then((response)  {
    int statusCode = response.statusCode;
    String donenDeger = response.body.toString();
    var modelim = (jsonDecode(donenDeger) as List)
        .map((e) => UrunModel2.fromJson(e))
        .toList();

    print(donenDeger);
    return modelim;
  });

}