listview grouping

XamarinStudy/XamarinStudy/XamarinStudy/Views/SampleListViewPage.xaml

@@ -4,10 +4,31 @@
              x:Class="XamarinStudy.Views.SampleListViewPage">
     <ContentPage.Content>
         <StackLayout>
-            <ListView x:Name="mainListView" ItemSelected="mainListView_ItemSelected">
+            <SearchBar x:Name="foodSearchBar" Placeholder="원하시는 음식을 입력해 주세요" TextChanged="foodSearchBar_TextChanged"/>
+            <ListView x:Name="mainListView" ItemSelected="mainListView_ItemSelected" ItemsSource="{Binding .}" Footer="{Binding .}"
+                      IsPullToRefreshEnabled="True" Refreshing="mainListView_Refreshing">
                 <ListView.Header>
                     <ContentView BackgroundColor="Salmon">
-                        <Label Text="Food List" HorizontalTextAlignment="Center" FontSize="Large" TextColor="White"/>
+                        <Label Text="음식 리스트" HorizontalTextAlignment="Center" FontSize="Large" TextColor="White"/>
+                    </ContentView>
+                </ListView.Header>
+                <ListView.ItemTemplate>
+                    <DataTemplate>
+                        <TextCell Text="{Binding Name}" Detail="{Binding Price}"/>
+                    </DataTemplate>
+                </ListView.ItemTemplate>
+                <ListView.FooterTemplate>
+                    <DataTemplate>
+                        <Label Text="{Binding Count, StringFormat='{0}ea'}" HorizontalTextAlignment="Center" FontSize="Medium" TextColor="Navy"/>
+                    </DataTemplate>
+                </ListView.FooterTemplate>
+            </ListView>
+            <ListView x:Name="groupedListView" ItemSelected="mainListView_ItemSelected" ItemsSource="{Binding .}" Footer="{Binding .}"
+                      IsPullToRefreshEnabled="True" Refreshing="mainListView_Refreshing"
+                      IsGroupingEnabled="True" GroupDisplayBinding="{Binding Key}">
+                <ListView.Header>
+                    <ContentView BackgroundColor="Salmon">
+                        <Label Text="음식 리스트" HorizontalTextAlignment="Center" FontSize="Large" TextColor="White"/>
                     </ContentView>
                 </ListView.Header>
                 <ListView.ItemTemplate>

XamarinStudy/XamarinStudy/XamarinStudy/Views/SampleListViewPage.xaml.cs

@@ -23,14 +23,27 @@ namespace XamarinStudy.Views
 
 		private void InitInstance()
 		{
-			foods = new List<Food>();
-			foods.Add(new Food() { Name = "냉면", Price = 10000, Flavor = "시원함" });
-			foods.Add(new Food() { Name = "모밀", Price = 80000, Flavor = "시원함" });
-			foods.Add(new Food() { Name = "국수", Price = 5000, Flavor = "얼큰함" });
-			foods.Add(new Food() { Name = "쫄면", Price = 5000, Flavor = "매콤함" });
-			foods.Add(new Food() { Name = "떡볶이", Price = 3000, Flavor = "매콤함" });
-			mainListView.ItemsSource = foods;
-			mainListView.Footer = foods;
+			//mainListView.ItemsSource = foods;
+			//mainListView.Footer = foods;
+			foods = GetFoodList();
+			mainListView.BindingContext = foods;
+			groupedListView.BindingContext = foods.OrderBy(f => f.Name).GroupBy(f => f.Flavor).ToList();
+		}
+
+	    private List<Food> GetFoodList()
+		{
+			List<Food> list = new List<Food>();
+			list.Add(new Food() { Name = "냉면", Price = 10000, Flavor = "시원함" });
+			list.Add(new Food() { Name = "모밀", Price = 80000, Flavor = "시원함" });
+			list.Add(new Food() { Name = "국수", Price = 5000, Flavor = "얼큰함" });
+			list.Add(new Food() { Name = "쫄면", Price = 5000, Flavor = "매콤함" });
+			list.Add(new Food() { Name = "떡볶이", Price = 3000, Flavor = "매콤함" });
+			list.Add(new Food() { Name = "라면", Price = 3000, Flavor = "매콤함" });
+			list.Add(new Food() { Name = "짜장면", Price = 3000, Flavor = "달콤함" });
+			list.Add(new Food() { Name = "떡라면", Price = 5000, Flavor = "매콤함" });
+			list.Add(new Food() { Name = "짜장떡볶이", Price = 3000, Flavor = "달콤함" });
+
+			return list;
 		}
 
 		private void mainListView_ItemSelected(object sender, SelectedItemChangedEventArgs e)
@@ -42,5 +55,20 @@ namespace XamarinStudy.Views
 			DisplayAlert("맛", $"선택한 음식의 맛은 {selected.Flavor} 입니다.", "확인");
 			mainListView.SelectedItem = null;
 		}
+
+		private void foodSearchBar_TextChanged(object sender, TextChangedEventArgs e)
+		{
+			mainListView.BindingContext = 
+				foods.Where(food => food.Name.ToLower().Contains(e.NewTextValue.Replace(" ", "").ToLower())).ToList();
+		}
+
+		private void mainListView_Refreshing(object sender, EventArgs e)
+		{
+			foodSearchBar.Text = "";
+			mainListView.BindingContext = GetFoodList();
+			DisplayAlert("상태", "음식 리스트를 다시 불러왔습니다.", "확인");
+
+			mainListView.EndRefresh();
+		}
 	}
 }