using CommunityToolkit.Mvvm.ComponentModel; using CommunityToolkit.Mvvm.Input; using NavTest.Eneities; using NavTest.Service.Ioc; using System.Collections.Generic; using System.Collections.ObjectModel; using System.Windows.Controls; using System.Windows.Media;  namespace NavTest.ViewModels {     public partial class Page5ViewModel : ObservableObject, ISingleton     {         private readonly PLCModels pLCModelsIoc;          public Page5ViewModel(PLCModels pLCModelsIoc)         {             this.pLCModelsIoc = pLCModelsIoc;             this.PLCModels = pLCModelsIoc.pLCModels;             MyBrush = new SolidColorBrush(Colors.Red);              for (int i = 0; i < 50; i++)             {                 MyStudents.Add(                     new()                     {                         Id = i,                         Age = $"{i + 10}",                         Name = $"Name{i + 5}",                         MyCourse = new()                         {                             new Course()                             {                                 CourseName = "语文",                                 Teacher = "张老师",                                 Score = i + 60,                                 Classroom = $"教室{i}"                             },                             new Course()                             {                                 CourseName = "英语",                                 Teacher = "李老师",                                 Score = i + 61,                                 Classroom = $"教室{i}"                             }                             ,                             new Course()                             {                                 CourseName = "数学",                                 Teacher = "张老师",                                 Score = i + 60,                                 Classroom = $"教室{i}"                             }                             ,                             new Course()                             {                                 CourseName = "语文",                                 Teacher = "张老师",                                 Score = i + 60,                                 Classroom = $"教室{i}"                             }                             ,                             new Course()                             {                                 CourseName = "语文",                                 Teacher = "张老师",                                 Score = i + 60,                                 Classroom = $"教室{i}"                             }                         }                     }                 );             }         }          [ObservableProperty]         private ObservableCollection pLCModels;          [ObservableProperty]         private Brush myBrush;          [ObservableProperty]         private List myStudents = new();          [ObservableProperty]         private int detailInex;          [RelayCommand]         public void Detail(DataGrid dataGrid)          {             DataGridRow dataGridRow = (DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromIndex(DetailInex);             if (dataGridRow.DetailsVisibility == System.Windows.Visibility.Visible)             {                 dataGridRow.DetailsVisibility = System.Windows.Visibility.Collapsed;             }             else             {                 dataGridRow.DetailsVisibility = System.Windows.Visibility.Visible;             }         }     } }  

    public class Student     {         public int Id { get; set; }         public string? Name { get; set; }         public string? Description { get; set; }         public string? Age { get; set; }         public List? MyCourse { get; set; }     } 

    public class Course     {         public string? CourseName { get; set; }         public string? Teacher { get; set; }         public int? Score { get; set; }         public string? Classroom { get; set; }     } 

效果: