брат хэй вэня

readme.md

@@ -1,275 +1,197 @@
-# Поиск, сортировка ("Университет")
-## Поиск
+# Каркас приложения. Модель данных. Привязка данных. Табличный вывод. ("Университет")
+## Создадим класс Студент
 ```
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Windows;
-using System.Windows.Controls;
-using System.Windows.Input;
-
-namespace University
+namespace WpfApp3.model
 {
-    public partial class MainWindow : Window
+    public class Student
     {
-        private List<Student> students;
-        private Dictionary<string, Func<Student, bool>> filters;
-        private AgeRange selectedAge = new AgeRange { ageFrom = 19, ageTo = 23 };
-        private string searchFilter = "";
-
-        public MainWindow()
-        {
-            InitializeComponent();
-            SearchFilterTextBox.KeyUp += SearchFilter_KeyUp;
-            InitializeData();
-
-            // Отображаем всех студентов в listview
-            UpdateStudentList(students);
-        }
-
-        private void InitializeData()
-        {
-            // Создаем список студентов
-            students = new List<Student>
-            {
-                new Student { Name = "Хэй Вэнь", Course = 3, Nationality = "Китаец", Age = 22 },
-                new Student { Name = "Эдвард Каллен", Course = 1, Nationality = "Американец", Age = 20 },
-                new Student { Name = "Джейк Ли", Course = 1, Nationality = "Китаец", Age = 19 },
-                new Student { Name = "Семен Хомяк", Course = 4, Nationality = "Русский", Age = 23 },
-                new Student { Name = "Эндрю Уилсон", Course = 3, Nationality = "Американец", Age = 21 },
-                new Student { Name = "Ариадна Санчес", Course = 2, Nationality = "Испанец", Age = 20 }
-            };
-
-            // Создаем словарь фильтров
-            filters = new Dictionary<string, Func<Student, bool>>
-            {
-                { "Все", s => true },
-                { "Первый курс", s => s.Course == 1 },
-                { "Второй курс", s => s.Course == 2 },
-                { "Третий курс", s => s.Course == 3 },
-                { "Четвертый курс", s => s.Course == 4 },
-                { "Русские", s => s.Nationality == "Русский" },
-                { "Китайцы", s => s.Nationality == "Китаец" },
-                { "Американцы", s => s.Nationality == "Американец" },
-                { "Испанцы", s => s.Nationality == "Испанец" },
-                { "Возраст 19-20", s => s.Age >= 19 && s.Age <= 20 },
-
-                { "Возраст 21-23", s => s.Age >= 21 && s.Age <= 23 }
-            };
-        }
-
-        private IEnumerable<Student> FilteredStudentList
-        {
-            get
-            {
-                // сохраняем во временную переменную полный список
-                var res = students;
-
-                // фильтруем по возрасту
-                res = (List<Student>)res.Where(s => (s.Age >= selectedAge.ageFrom && s.Age < selectedAge.ageTo));
-
-                // если фильтр не пустой, то ищем ВХОЖДЕНИЕ подстроки поиска в имени без учета регистра
-                if (searchFilter != "")
-                    res = (List<Student>)res.Where(s => s.Name.IndexOf(searchFilter, StringComparison.OrdinalIgnoreCase) >= 0);
-
-                return res;
-            }
-        }
-
-        private void UpdateStudentList(List<Student> studentsToDisplay)
-        {
-            StudentListView.ItemsSource = studentsToDisplay;
-        }
-
-        private void SearchFilter_KeyUp(object sender, KeyEventArgs e)
+        public string Name { get; set; }
+        public int Age { get; set; }
+        public int Course { get; set; }
+        public string Nation { get; set; }
+        public string Photo { get; set; }
+    }
+}
+```
+## создадим интерфейс IDataProvider
+```
+namespace WpfApp3.model
+{
+    internal interface IDataProvider
+    {
+    }
+}
+```
+## класс LocalDataProvider
+```
+namespace WpfApp3.model
+{
+    public class LocalDataProvider : IDataProvider
+    {
+        public IEnumerable<Student> GetStudents()
         {
-            searchFilter = SearchFilterTextBox.Text;
-            UpdateStudentList(FilteredStudentList.ToList());
+            return new Student[]{
+            new Student{
+                Age=24,
+                Nation="Китаец",
+                Course=4,
+                Name="Хэй Вэнь"},
+            new Student{
+                Age=22,
+                Nation="Русский",
+                Course=2,
+                Name="Семен Хомяк"},
+            new Student{
+                Age=19,
+                Nation="Американец",
+                Course=1,
+                Name="Джейк Ли"}
+        };
         }
     }
-
-    public class Student
+}
+```
+## создадим класс Globals
+```
+namespace WpfApp3
+{
+    internal class Glocals
     {
-        public string Name { get; set; }
-        public int Course { get; set; }
-        public string Nationality { get; set; }
-        public int Age { get; set; }
     }
-
-    public class AgeRange
+    class Globals
     {
-        public int ageFrom { get; set; }
-        public int ageTo { get; set; }
+        public static IDataProvider dataProvider;
     }
 }
-
 ```
 ```
-<Window x:Class="University.MainWindow"
+<Window x:Class="WpfApp3.MainWindow"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-        xmlns:local="clr-namespace:University"
+        xmlns:local="clr-namespace:WpfApp3"
         mc:Ignorable="d"
-        Title="University" Height="450" Width="800">
-    <Grid>
+        Title="MainWindow" Height="450" Width="800">
+    <Grid ShowGridLines="True">
         <Grid.RowDefinitions>
-            <RowDefinition Height="Auto" />
-            <RowDefinition Height="*" />
+            <RowDefinition Height="auto"/>
+            <RowDefinition />
+            <RowDefinition Height="auto"/>
         </Grid.RowDefinitions>
-
-        <StackPanel Orientation="Horizontal" Margin="10">
-            <Label 
-    Content="искать" 
-    VerticalAlignment="Center"/>
-            <TextBox
-    Width="200"
-    VerticalAlignment="Center"
-    x:Name="SearchFilterTextBox" 
-    KeyUp="SearchFilter_KeyUp"/>
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="200"/>
+            <ColumnDefinition/>
+        </Grid.ColumnDefinitions>
+
+        <!-- типа логотип компании -->
+        <Image 
+            Source="/img/student.jpg" 
+            Grid.RowSpan="2"/>
+
+        <StackPanel 
+            Orientation="Vertical"
+            Grid.RowSpan="3"
+            VerticalAlignment="Bottom">
+            <Button 
+                x:Name="ExitButton"
+                Content="Выход" 
+                Click="ExitButton_Click"
+                Height="50"/>
         </StackPanel>
 
-        <ListView x:Name="StudentListView" Grid.Row="1" Margin="10">
-            <ListView.View>
-                <GridView>
-                    <GridViewColumn Header="Имя" DisplayMemberBinding="{Binding Name}" />
-                    <GridViewColumn Header="Курс" DisplayMemberBinding="{Binding Course}" />
-                    <GridViewColumn Header="Национальность" DisplayMemberBinding="{Binding Nationality}" />
-                    <GridViewColumn Header="Возраст" DisplayMemberBinding="{Binding Age}" />
-                </GridView>
-            </ListView.View>
-        </ListView>
+        <WrapPanel
+            Orientation="Horizontal"
+            Grid.Column="1"
+            MinHeight="50">
+            
+        </WrapPanel>
+
+        <DataGrid
+            Grid.Row="1"
+            Grid.Column="1"
+            CanUserAddRows="False"
+            AutoGenerateColumns="False"
+            ItemsSource="{Binding StudentList}">
+            <DataGrid.Columns>
+                <DataGridTextColumn
+                    Header="Имя"
+                    Binding="{Binding Name}"/>
+                <DataGridTextColumn
+                    Header="Возраст"
+                    Binding="{Binding Age}"/>
+                <DataGridTextColumn
+                    Header="Курс"
+                    Binding="{Binding Course}"/>
+                <DataGridTextColumn
+                    Header="Национальность"
+                    Binding="{Binding Nation}"/>
+            </DataGrid.Columns>
+        </DataGrid>
     </Grid>
 </Window>
 ```
-![](./img/Снимок%20экрана%202024-04-27%20222231.png)
-## Сортировка
 ```
 using System;
 using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using System.Linq;
 using System.Windows;
 using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+using WpfApp3.model;
 
-namespace University
+namespace WpfApp3
 {
     public partial class MainWindow : Window
     {
-        private List<Student> students;
-        private bool sortAsc = true;
+        public ObservableCollection<Student> StudentList { get; set; }
 
         public MainWindow()
         {
             InitializeComponent();
-
-            // Инициализируем список студентов
-            InitializeData();
-
-            // Отображаем всех студентов в listview
-            UpdateStudentList(students);
-        }
-
-        private void InitializeData()
-        {
-            // Создаем список студентов
-            students = new List<Student>
-            {
-                new Student { Name = "Хэй Вэнь", Course = 3, Nationality = "Китаец", Age = 22 },
-                new Student { Name = "Эдвард Каллен", Course = 1, Nationality = "Американец", Age = 19 },
-                new Student { Name = "Джейк Ли", Course = 1, Nationality = "Китаец", Age = 19 },
-                new Student { Name = "Семен Хомяк", Course = 4, Nationality = "Русский", Age = 23 },
-                new Student { Name = "Эндрю Уилсон", Course = 2, Nationality = "Американец", Age = 21 },
-                new Student { Name = "Мария Гонсалес", Course = 3, Nationality = "Испанец", Age = 20 }
-            };
+            DataContext = this;
+            Globals.dataProvider = new LocalDataProvider();
+            StudentList = new ObservableCollection<Student>(Globals.dataProvider.GetStudents());
         }
 
-        private void FilterComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
+        private void ExitButton_Click(object sender, RoutedEventArgs e)
         {
-            List<Student> filteredStudents = new List<Student>();
-
-            
-
-            UpdateStudentList(filteredStudents);
-        }
-
-        private void UpdateStudentList(List<Student> studentsToDisplay)
-        {
-            StudentListView.ItemsSource = studentsToDisplay;
+            Application.Current.Shutdown();
         }
+    }
 
-        private void RadioButton_Checked(object sender, RoutedEventArgs e)
-        {
-            sortAsc = (sender as RadioButton).Tag.ToString() == "1";
-            InvalidateVisual(); // Исправлено имя метода
-        }
+    internal interface IDataProvider
+    {
+        IEnumerable<Student> GetStudents();
+    }
 
-        private IEnumerable<Student> FilteredStudentList
+    public class LocalDataProvider : IDataProvider
+    {
+        public IEnumerable<Student> GetStudents()
         {
-            get
+            return new List<Student>
             {
-                // сохраняем во временную переменную полный список
-                var res = students;
-
-                return res;
-            }
+                new Student { Name = "Хэй Вэнь", Age = 24, Course = 4, Nation = "Китаец" },
+                new Student { Name = "Семен Хомяк", Age = 22, Course = 2, Nation = "Русский" },
+                new Student { Name = "Джейк Ли", Age = 19, Course = 1, Nation = "Американец" },
+            };
         }
     }
 
-    class Student
+    public class Student
     {
         public string Name { get; set; }
-        public int Course { get; set; }
-        public string Nationality { get; set; }
         public int Age { get; set; }
+        public int Course { get; set; }
+        public string Nation { get; set; }
     }
 }
 ```
-```
-<Window x:Class="University.MainWindow"
-        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
-        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-        xmlns:local="clr-namespace:University"
-        mc:Ignorable="d"
-        Title="University" Height="450" Width="800">
-	<Grid>
-		<Grid.RowDefinitions>
-			<RowDefinition Height="Auto" />
-			<RowDefinition Height="*" />
-		</Grid.RowDefinitions>
-
-		<StackPanel Orientation="Horizontal" Margin="10">
-			<Label
-    Content="Возраст:"
-    VerticalAlignment="Center"/>
-			<RadioButton
-				GroupName="Age"
-				Tag="1"
-				Content="по возрастанию"
-				IsChecked="True"
-				Checked="RadioButton_Checked"
-				VerticalAlignment="Center"/>
-			<RadioButton
-				GroupName="Age"
-				Tag="2"
-				Content="по убыванию"
-				Checked="RadioButton_Checked"
-				VerticalAlignment="Center"/>
-		</StackPanel>
-
-		<ListView x:Name="StudentListView" Grid.Row="1" Margin="10">
-			<ListView.View>
-				<GridView>
-					<GridViewColumn Header="Имя" DisplayMemberBinding="{Binding Name}" />
-					<GridViewColumn Header="Курс" DisplayMemberBinding="{Binding Course}" />
-					<GridViewColumn Header="Национальность" DisplayMemberBinding="{Binding Nationality}" />
-					<GridViewColumn Header="Возраст" DisplayMemberBinding="{Binding Age}" />
-				</GridView>
-			</ListView.View>
-		</ListView>
-	</Grid>
-</Window>
-```
-![](./img/Снимок%20экрана%202024-04-28%20203454.png)
+![](./img/Снимок%20экрана%202024-05-02%20214956.png)