我将模型对象的可观察集合绑定到数据网格。但是当我将绑定设置到集合时，我收到了指向人员的路径错误。
在调试此问题时，我检查了 CustomerModel 中的公共属性在 DataGrid 绑定中是否正确命名。而且返回到模型的集合不为空。我还检查了视图后面的代码中的数据上下文是否设置正确。
我认为由于我在 xaml 中指定绑定路径的方式，这可能是一个错误。
每个字段的绑定错误的完整详细信息如下：
System.Windows.Data Error: 40 : BindingExpression path error: 'FirstName' property not found on 'object' ''MainViewModel' (HashCode=55615518)'. BindingExpression:Path=FirstName; DataItem='MainViewModel' (HashCode=55615518); target element is 'TextBox' (Name='fNameTbx'); target property is 'Text' (type 'String')
System.Windows.Data Error: 40 : BindingExpression path error: 'LastName' property not found on 'object' ''MainViewModel' (HashCode=55615518)'. BindingExpression:Path=LastName; DataItem='MainViewModel' (HashCode=55615518); target element is 'TextBox' (Name='lNameTbx'); target property is 'Text' (type 'String')
System.Windows.Data Error: 40 : BindingExpression path error: 'Email' property not found on 'object' ''MainViewModel' (HashCode=55615518)'. BindingExpression:Path=Email; DataItem='MainViewModel' (HashCode=55615518); target element is 'TextBox' (Name='emailTbx'); target property is 'Text' (type 'String')
有人能指出我正确的方向，以便进一步调试吗？
DataGrid绑定路径和源设置如下：
<DataGrid Name="infogrid"
Grid.Row="0"
Grid.RowSpan="3"
Grid.Column="1"
Grid.ColumnSpan="3"
AutoGenerateColumns="False"
ItemsSource="{Binding Customers}"
SelectedItem="{Binding SelectedCustomer}">
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding Customers.Id}" Header="ID" />
<DataGridTextColumn Binding="{Binding Customers.FirstName}" Header="First Name" />
<DataGridTextColumn Binding="{Binding Customers.LastName}" Header="Last Name" />
<DataGridTextColumn Binding="{Binding Customers.Email}" Header="Email" />
</DataGrid.Columns>
</DataGrid>
视图模型包含一个 CustomerModel 类型的 Observable 集合，称为 Customers。这就是我将 DataGrid ItemSource 设置为的内容。 （为了便于阅读，我从虚拟机中删除了其他代码）
namespace MongoDBApp.ViewModels
{
class MainViewModel : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged = delegate { };
private ICustomerDataService _customerDataService;
public MainViewModel(ICustomerDataService customerDataService)
{
this._customerDataService = customerDataService;
QueryDataFromPersistence();
}
private ObservableCollection<CustomerModel> customers;
public ObservableCollection<CustomerModel> Customers
{
get
{
return customers;
}
set
{
customers = value;
RaisePropertyChanged("Customers");
}
}
private void QueryDataFromPersistence()
{
Customers = _customerDataService.GetAllCustomers().ToObservableCollection();
}
private void RaisePropertyChanged(string propertyName)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
}
}
这些是 CustomerModel 中的字段，因此不确定为什么在绑定过程中找不到这些属性：
public class CustomerModel : INotifyPropertyChanged
{
private ObjectId id;
private string firstName;
private string lastName;
private string email;
[BsonElement]
ObservableCollection<CustomerModel> customers { get; set; }
/// <summary>
/// This attribute is used to map the Id property to the ObjectId in the collection
/// </summary>
[BsonId]
public ObjectId Id { get; set; }
[BsonElement("firstName")]
public string FirstName
{
get
{
return firstName;
}
set
{
firstName = value;
RaisePropertyChanged("FirstName");
}
}
[BsonElement("lastName")]
public string LastName
{
get
{
return lastName;
}
set
{
lastName = value;
RaisePropertyChanged("LastName");
}
}
[BsonElement("email")]
public string Email
{
get
{
return email;
}
set
{
email = value;
RaisePropertyChanged("Email");
}
}
public event PropertyChangedEventHandler PropertyChanged;
private void RaisePropertyChanged(string propertyName)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
}
这是在视图后面的代码中设置数据上下文的方式：
public partial class MainView : Window
{
private MainViewModel ViewModel { get; set; }
private static ICustomerDataService customerDataService = new CustomerDataService(CustomerRepository.Instance);
public MainView()
{
InitializeComponent();
ViewModel = new MainViewModel(customerDataService);
this.DataContext = ViewModel;
}
}
