删除或添加后刷新数据网格 - MVVM WPF

本文介绍了删除或添加后刷新数据网格 - MVVM WPF的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 您好， 从我的DataGrid中删除一行后，我遇到了刷新DataGrid的问题， Voici mon XAML： < DataGrid x：名称 = EmpDataGrid ItemsSource = {Binding loadDataBinding，Mode = TwoWay} CanUserResizeRows = False CanUserAddRows = False SelectedItem = {Binding CurrentCustomer} Grid.ColumnSpan = 2 > ViewModel： 当我点击删除按钮时，Datagrid不刷新！并在我的数据库中删除 如何更正此错误？ 谢谢 我尝试过： < pre> private ObservableCollection< Custmor> _loadDataBinding; public ObservableCollection< Custmor> loadDataBinding { get { return _loadDataBinding ; } set {_loadDataBinding = value ; OnPropertyChanged（ loadDataBinding）; } } public ViewModel1（） { // Affichage mon DataGrid 使用（Test1Entities context = new Test1Entities（）） { _loadDataBinding = new 的ObservableCollection< Custmor>（context.Custmor.ToList（））; } deleteCustomer = new RelayCommand（delete，canexecute）; } private ICommand deleteCustomer; public ICommand DeleteCustomer { get { return deleteCustomer; } } 私有 void delete（ object obj） { 使用（Test1Entities context = new Test1Entities（）） { Custmor cus = context.Custmor.Find（currentCustomer.ID）; context.Custmor.Remove（cus）; context.SaveChanges（）; } } 私人 Custmor currentCustomer; public Custmor CurrentCustomer { get { return currentCustomer; } set { currentCustomer = value ; test = currentCustomer; OnPropertyChanged（ CurrentCustomer）; } } loadDataBinding.ToList（）; 解决方案 你是从数据库中删除项目，但不从绑定到 DataGrid （ _loadDataBinding ）的集合中删除。您可以在 delete 方法中执行此操作： private void delete（object obj ） { 使用（Test1Entities context = new Test1Entities（）） { Custmor cus = context.Custmor.Find（currentCustomer.ID）; context.Custmor.Remove（cus）; context.SaveChanges（）; } //从集合中删除项目 _loadDataBinding.Remove（CurrentCustomer）; } Hello,After deleting a line from my DataGrid, I have a problem to Refresh the DataGrid,Voici mon XAML:<DataGrid x:Name="EmpDataGrid" ItemsSource="{Binding loadDataBinding,Mode=TwoWay}" CanUserResizeRows="False" CanUserAddRows="False" SelectedItem="{Binding CurrentCustomer}" Grid.ColumnSpan="2">ViewModel:And when I click the delete button, the Datagrid does not refresh !! and in my database is deletedHow will I correct this error?ThanksWhat I have tried:<pre>private ObservableCollection<Custmor> _loadDataBinding; public ObservableCollection<Custmor> loadDataBinding{ get { return _loadDataBinding; } set { _loadDataBinding = value; OnPropertyChanged("loadDataBinding"); }} public ViewModel1(){ //Affichage mon DataGrid using (Test1Entities context = new Test1Entities()) { _loadDataBinding = new ObservableCollection<Custmor>(context.Custmor.ToList()); } deleteCustomer = new RelayCommand(delete, canexecute); } private ICommand deleteCustomer;public ICommand DeleteCustomer{ get { return deleteCustomer; }} private void delete(object obj){ using (Test1Entities context = new Test1Entities()) { Custmor cus = context.Custmor.Find(currentCustomer.ID); context.Custmor.Remove(cus ); context.SaveChanges(); }} private Custmor currentCustomer; public Custmor CurrentCustomer{ get { return currentCustomer; } set { currentCustomer = value; test = currentCustomer; OnPropertyChanged("CurrentCustomer"); }} loadDataBinding.ToList(); 解决方案 You are removing an item from the database, but not from the collection binded to your DataGrid (_loadDataBinding). You can do this in your delete method:private void delete(object obj){ using (Test1Entities context = new Test1Entities()) { Custmor cus = context.Custmor.Find(currentCustomer.ID); context.Custmor.Remove(cus ); context.SaveChanges(); } // remove item from collection _loadDataBinding.Remove(CurrentCustomer);} 这篇关于删除或添加后刷新数据网格 - MVVM WPF的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！