从viewmodel fils MVVM WPF刷新datagrid [英] Refresh datagrid from viewmodel fils MVVM WPF

问题描述

我有MainWindow和Window Add，ViewModel和ViewModelADD..l'添加新客户在数据库中是正确的，但DataGrid的刷新没有！当我完成l'时，Window ADD不会关闭！



ViewModel：



ViewModelADD：



如何修复它？

添加新的Customer ..并刷新DataGrid，以及客户添加时...窗户添加关闭



谢谢，



我尝试过：

< pre> private  static  ViewModel1 instance =  new  ViewModel1（）; 
  public   static  ViewModel1 Instance { get  { return 实例; 
 
 
  private   void   add （ object  obj）
 {
 add addView =  new 添加（）; 
 addView.DataContext =  new  ViewModelADD（loadDataBinding）; 
 addView.Show（）; 
} 
 
  private  ObservableCollection< Custmor> _loadDataBinding; 
 
  public  ObservableCollection< Custmor> loadDataBinding 
 {
  get  
 {
  return  _loadDataBinding ; 
} 
 
  set  
 {
 _loadDataBinding =  value ; 
 OnPropertyChanged（  loadDataBinding）; 
} 
} 

< pre>  public  ViewModelADD（ObservableCollection< Custmor> loadDataBinding）
 {
 CustomerToAddObject =  new  Custmor （）; 
 
 addCustomer1 =  new  RelayCommand（ADDFunction）; 
} 
 
 
 私人 ICommand addCustomer1; 
  public  ICommand AddCustomer1 
 {
  get  { return  addCustomer1; } 
} 
 
 
 私有  void  ADDFunction（  object  obj）
 {
 使用（Test1Entities context =  new  Test1Entities（））
 {
 context.Custmor.Add（customerToAddObject）; 
 context.SaveChanges（）; 
 MessageBox.Show（ 客户aétéajoutéavecsuccès！）; 
} 
 
 ViewModel1.Instance.loadDataBinding.Add（customerToAddObject）; 

解决方案

我找到了解决方案，
首先我修改了ViewModel：

  private   void   add （ object  obj）
 {
添加addView =  new  Add（）; 
 addView.DataContext =  new  ViewModelADD（addView，loadDataBinding）; 
 addView.Show（）; 
} 

然后我修改ViewModelADD：

< pre>  private   readonly  Window _window; 
  private   readonly  ObservableCollection< Custmor> _loadDataBinding; 
 
  public  ViewModelADD（Window window，ObservableCollection< Custmor> loadDataBinding）
 {
 CustomerToAddObject =  new  Custmor（）; 
 
 addCustomer1 =  new  RelayCommand（ADDFunction）; 
 _window = window; 
 _loadDataBinding = loadDataBinding; 
} 
 
 
  private   void  ADDFunction（< span class =code-keyword> object  obj）
 {
  using （Test1Entities context =  new  Test1Entities（））
 {
 context.Custmor.Add（customerToAddObject）; 
 context.SaveChanges（）; 
 MessageBox.Show（ 客户aétéajoutéavecsuccès！）; 
} 
 
 _loadDataBinding.Add（customerToAddObject）; 
 _window.Close（）; 
} 

现在工作正常，

Hi,

I have MainWindow and Window Add , ViewModel and ViewModelADD..l'addition of new Customer is correct in database, but the refresh of DataGrid no ! and when i finish l'addition , the Window ADD doesn't close !

ViewModel:

ViewModelADD:

How can I fix it?
to add new Customer..and refresh the DataGrid, and when the Customer added..the Window ADD close

Thanks,

What I have tried:

<pre>private static ViewModel1 instance = new ViewModel1();
        public static ViewModel1 Instance { get { return instance; } }
		
		
		    private void add(object obj)
        {
			Add addView = new Add();
            addView.DataContext = new ViewModelADD(loadDataBinding);
            addView.Show();
		}
		
		 private ObservableCollection<Custmor> _loadDataBinding;     

        public ObservableCollection<Custmor> loadDataBinding
        {
            get
            {
                return _loadDataBinding;
            }

            set
            {
                _loadDataBinding = value;
                OnPropertyChanged("loadDataBinding");
            }
        }

<pre> public ViewModelADD(ObservableCollection<Custmor> loadDataBinding)
        {
            CustomerToAddObject = new Custmor();

            addCustomer1 = new RelayCommand(ADDFunction);
        }
		
		
		 private ICommand addCustomer1;      
          public ICommand AddCustomer1
        {
            get { return addCustomer1; }
        }

       
        private void ADDFunction(object obj)
        {
            using (Test1Entities context = new Test1Entities())
            {
                context.Custmor.Add(customerToAddObject);
                context.SaveChanges();
                MessageBox.Show("Customer a été ajouté avec succès!");
            }

            ViewModel1.Instance.loadDataBinding.Add(customerToAddObject);

解决方案

I found the solution,
first I modify the ViewModel:

private void add(object obj)
        {        
            Add addView = new Add();
            addView.DataContext = new ViewModelADD(addView,loadDataBinding);
            addView.Show();
        }

then i modify the ViewModelADD:

<pre> private readonly Window _window;       
        private readonly ObservableCollection<Custmor> _loadDataBinding;
		
		 public ViewModelADD(Window window,ObservableCollection<Custmor> loadDataBinding)
        {
            CustomerToAddObject = new Custmor();

            addCustomer1 = new RelayCommand(ADDFunction);
            _window = window;
            _loadDataBinding = loadDataBinding;
        }
		
		
		   private void ADDFunction(object obj)
        {
            using (Test1Entities context = new Test1Entities())
            {
                context.Custmor.Add(customerToAddObject);
                context.SaveChanges();
                MessageBox.Show("Customer a été ajouté avec succès!");
            }
                                
            _loadDataBinding.Add(customerToAddObject);
            _window.Close();           
        }

It works correct now,

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