实例介绍
【实例简介】
【实例截图】
【核心代码】
using System; using System.Collections.Generic; using System.Linq; using System.Text; 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 BusinessDataSample.CustomersDataSetTableAdapters; using System.Data; using System.Data.OleDb; namespace BusinessDataSample { /// <summary> /// Interaction logic for Window1.xaml /// </summary> public partial class MainWindow : Window { private CustomersDataSet.CustomersDataTable customers; private CollectionView dataView; internal CollectionView DataView { get { if (dataView == null) { dataView = (CollectionView) CollectionViewSource.GetDefaultView( this.DataContext); } return dataView; } } public MainWindow() { InitializeComponent(); CustomersTableAdapter customersTableAdapter = new CustomersTableAdapter(); customers = customersTableAdapter.GetData(); this.DataContext = customers; } private void nextButton_Click(object sender, RoutedEventArgs e) { DataView.MoveCurrentToNext(); } private void previousButton_Click(object sender, RoutedEventArgs e) { DataView.MoveCurrentToPrevious(); } private void OnRowUpdated(object sender, OleDbRowUpdatedEventArgs e) { if (e.StatementType == StatementType.Insert) { OleDbCommand cmdNewID = new OleDbCommand( "SELECT @@IDENTITY", e.Command.Connection); e.Row["ID"] = (int)cmdNewID.ExecuteScalar(); } } private void saveButton_Click(object sender, RoutedEventArgs e) { CustomersTableAdapter customersTableAdapter = new CustomersTableAdapter(); customersTableAdapter.Adapter.RowUpdated = new OleDbRowUpdatedEventHandler(OnRowUpdated); int rows = customersTableAdapter.Update(customers); System.Windows.MessageBox.Show( "Changes saved back to the database, " rows " row(s) updated."); } private void addNewButton_Click(object sender, RoutedEventArgs e) { customers.AddCustomersRow("New Company", "", "", "", "", "", "", "", "", ""); customerListBox.SelectedIndex = customers.Rows.Count - 1; } private void deleteButton_Click(object sender, RoutedEventArgs e) { CustomersDataSet.CustomersRow selectedRow = (CustomersDataSet.CustomersRow) ((DataRowView)customerListBox.SelectedItem).Row; string company = selectedRow.CompanyName; string message = "Are you sure you want to delete the " "customer \"" company "\"?"; if (MessageBox.Show(message, "Delete Customer", MessageBoxButton.YesNoCancel, MessageBoxImage.Exclamation) == MessageBoxResult.Yes) { selectedRow.Delete(); } } } }
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