WPF DataGrid控件的使用

下面以一个例子说明DataGrid控件的使用方法：

一、程序框架
使用了MVVM Light框架

二、主要代码部分（使用MVVM Light框架）：
1.主窗体xaml代码 (MainWindow.xaml)：

2.ViewModel类代码（MainViewModel.cs）：

public class MainViewModel : ViewModelBase
    {
        public MainViewModel()
        {
            mylocalDB = new localDB();

            QueryCommand = new RelayCommand(Query);
            ResetCommand = new RelayCommand(()=>
            {
                Search = string.Empty;
                this.Query();
            });

            EditCommand = new RelayCommand(t => Edit(t));
            DelCommand = new RelayCommand(t => Del(t));

            AddCommand = new RelayCommand(Add);
        }
        localDB mylocalDB;

        private string search = string.Empty;
        public string Search
        {
            get { return search; }
            set { search = value;RaisePropertyChanged(); }
        }


        private ObservableCollection gridModelList;

        public ObservableCollection GridModelList
        {
            get { return gridModelList; }
            set { gridModelList = value;RaisePropertyChanged(); }
        }

        #region Command
        public RelayCommand QueryCommand { get; set; }
        public RelayCommand ResetCommand { get; set; }

        public RelayCommand EditCommand { get; set; }
        public RelayCommand DelCommand { get; set; }

        public RelayCommand AddCommand { get; set; }
        #endregion
        public void Query()
        {
            var models = mylocalDB.GetStudentsByName(Search);
            GridModelList = new ObservableCollection();
            if(models != null)
            {
                models.ForEach(arg =>
                {
                    GridModelList.Add(arg);
                });
            }
        }

        public void Edit(int id)
        {
            var model = mylocalDB.GetStudentById(id);
            if(model != null)
            {
                UserView view = new UserView(model);
                var res = view.ShowDialog();
                if(res.Value)
                {
                    var newModel =GridModelList.FirstOrDefault(t=>t.Id == model.Id);
                    if(newModel != null)
                    {
                        newModel.Name = model.Name;
                    }
                }
            }
        }

        public void Add()
        {
            Student stu = new Student();
            UserView view = new UserView(stu);
            var res = view.ShowDialog();
            if (res.Value)
            {
                stu.Id = gridModelList.Max(t => t.Id) + 1; ;
                mylocalDB.AddStudent(stu);
                this.Query();
            }
        }

        public void Del(int id)
        {
            var model = mylocalDB.GetStudentById(id);
            if (model != null)
            {
                var res = MessageBox.Show($"确认删除当前用户:{model.Name}?","操作提示：",MessageBoxButton.OK,MessageBoxImage.Question);
                if(res == MessageBoxResult.OK)
                {
                    mylocalDB.DelStudent(model.Id);
                }
                this.Query();
            }
        }
    }

3.主窗体后台代码（MainWindow.xaml.cs）：

public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

            MainViewModel viewModel = new MainViewModel();
            viewModel.Query();

            this.DataContext = viewModel;
        }
    }

4.Student类：

public class Student:ViewModelBase
    {
        private int id;
        private string name;

        public int Id
        {
            get { return id; }
            set 
            {
                id = value;
                RaisePropertyChanged();
            }
        }

        public string Name
        {
            get { return name; }
            set
            {
                name = value;
                RaisePropertyChanged();
            }
        }
    }

5.localDB类（这里充当数据库功能）

public class localDB
    {
        public localDB()
        {
            Init();
        }
        private List students;

        private void Init()
        {
            students = new List();
            for (int i = 0; i < 30; i++)
            {
                students.Add(new Student()
                {
                    Id = i,
                    Name = $"Sample{i}"
                }) ;
            }
        }

        public List GetStudents()
        {
            return students;
        }

        //新增
        public void AddStudent(Student stu)
        {
            students.Add(stu);
        }

        //删除
        public void DelStudent(int id)
        {
            var model = students.FirstOrDefault(t => t.Id == id);
            if(model!=null)
            {
                students.Remove(model);
            }
        }

        public List GetStudentsByName(string name)
        {
            return students.Where(q=>q.Name.Contains(name)).ToList();
        }

        public Student GetStudentById(int id)
        {
            var model = students.FirstOrDefault(t=>t.Id == id);
            if(model != null)
            {
                return new Student() { 
                    Id = model.Id,
                    Name = model.Name
                };
            }
            return null;
        }
    }

三、运行效果：

其他示例一：
如果不用MVVM，DataGrid中的按钮也可以Tag来绑定数据，用事件触发：

样式资源：

其他实例二：
（显示部分按钮）

其他实例三：