我正在尝试使用Silverlight（3）中的MVVM模式找到从ChildWindow / 弹出窗口获取数据的正确方法。例如：我有一个包含数据输入表单的主页面，我想打开一个包含客户列表的弹出窗口。当用户选择客户时，我想将所选客户转移到主页面。这是我目前正在使用的（示例）代码：
主页面
public partial class MainPage : UserControl
{
public MainPageViewModel ViewModel { get; private set; }
public MainPage()
{
InitializeComponent();
ViewModel = new MainPageViewModel();
DataContext = ViewModel;
}
private void SearchCustomer_Click(object sender, RoutedEventArgs e)
{
ViewModel.SearchCustomer();
}
}
public class MainPageViewModel: ViewModel
{
private string customer;
public string Customer
{
get { return customer; }
set { customer = value; RaisePropertyChanged("Customer"); }
}
public void SearchCustomer()
{
// Called from a view
SearchWindow searchWindow = new SearchWindow();
searchWindow.Closed += (sender, e) =>
{
if ((bool)searchWindow.DialogResult)
{
Customer = searchWindow.ViewModel.SelectedCustomer.ToString();
}
};
searchWindow.Show();
}
}
子窗口
public partial class SearchWindow : ChildWindow
{
public SearchWindowViewModel ViewModel { get; private set; }
public SearchWindow()
{
InitializeComponent();
ViewModel = new SearchWindowViewModel();
DataContext = ViewModel;
}
private void OKButton_Click(object sender, RoutedEventArgs e)
{
DialogResult = ViewModel.OkButtonClick();
}
private void CancelButton_Click(object sender, RoutedEventArgs e)
{
DialogResult = ViewModel.CancelButtonClick();
}
}
public class SearchWindowViewModel: ViewModel
{
private Customer selectedCustomer;
private ObservableCollection<Customer> customers;
public ObservableCollection<Customer> Customers
{
get { return customers; }
set {customers = value; RaisePropertyChanged("Customers"); }
}
public Customer SelectedCustomer
{
get { return selectedCustomer; }
set { selectedCustomer = value; RaisePropertyChanged("SelectedCustomer"); }
}
public SearchWindowViewModel()
{
Customers = new ObservableCollection<Customer>();
ISearchService searchService = new FakeSearchService();
foreach (Customer customer in searchService.FindCustomers("dummy"))
Customers.Add(customer);
}
public bool? OkButtonClick()
{
if (SelectedCustomer != null)
return true;
else
return null; // show some error message before that
}
public bool? CancelButtonClick()
{
return false;
}
}
这是正确的方式吗？还有更简单的方法吗？
谢谢， Rok