From 880ce862be80e30cc188456897e7aedc1257e07e Mon Sep 17 00:00:00 2001
From: syneffort <syneffort@gmail.com>
Date: Tue, 31 Jan 2023 15:35:49 +0900
Subject: [PATCH] listview grouping

---
 .../Views/SampleListViewPage.xaml             | 19 ++++++++++++++
 .../Views/SampleListViewPage.xaml.cs          | 26 ++++++++++---------
 2 files changed, 33 insertions(+), 12 deletions(-)

diff --git a/XamarinStudy/XamarinStudy/XamarinStudy/Views/SampleListViewPage.xaml b/XamarinStudy/XamarinStudy/XamarinStudy/Views/SampleListViewPage.xaml
index 6e98d49..bc0c0eb 100644
--- a/XamarinStudy/XamarinStudy/XamarinStudy/Views/SampleListViewPage.xaml
+++ b/XamarinStudy/XamarinStudy/XamarinStudy/Views/SampleListViewPage.xaml
@@ -23,6 +23,25 @@
                     </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>
+                    <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>
         </StackLayout>
     </ContentPage.Content>
 </ContentPage>
\ No newline at end of file
diff --git a/XamarinStudy/XamarinStudy/XamarinStudy/Views/SampleListViewPage.xaml.cs b/XamarinStudy/XamarinStudy/XamarinStudy/Views/SampleListViewPage.xaml.cs
index 8088a36..d4b94e7 100644
--- a/XamarinStudy/XamarinStudy/XamarinStudy/Views/SampleListViewPage.xaml.cs
+++ b/XamarinStudy/XamarinStudy/XamarinStudy/Views/SampleListViewPage.xaml.cs
@@ -25,23 +25,25 @@ namespace XamarinStudy.Views
 		{
 			//mainListView.ItemsSource = foods;
 			//mainListView.Footer = foods;
-			mainListView.BindingContext = GetFoodList();
+			foods = GetFoodList();
+			mainListView.BindingContext = foods;
+			groupedListView.BindingContext = foods.OrderBy(f => f.Name).GroupBy(f => f.Flavor).ToList();
 		}
 
 	    private List<Food> GetFoodList()
 		{
-			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" });
-			foods.Add(new Food() { Name = "라면", Price = 3000, Flavor = "매콤함" });
-			foods.Add(new Food() { Name = "짜장면", Price = 3000, Flavor = "달콤함" });
-			foods.Add(new Food() { Name = "떡라면", Price = 5000, Flavor = "매콤함" });
-			foods.Add(new Food() { Name = "짜장떡볶이", Price = 3000, Flavor = "달콤함" });
+			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 foods;
+			return list;
 		}
 
 		private void mainListView_ItemSelected(object sender, SelectedItemChangedEventArgs e)