Question

如果我有一个由SubSonic 2.2创建的DAL，我如何将它创建的集合转换为代码（pref.VB.NET）中的WPF ObservableCollections以供WPF使用？

Answer 1

抱歉！VB：

[Test]
public void Exec_Testing()
{
    ProductCollection products =
        DB.Select().From("Products")
            .Where("categoryID").IsEqualTo(5)
            .And("productid").IsGreaterThan(50)
            .ExecuteAsCollection<ProductCollection>();

    Assert.IsTrue(products.Count == 77);

    ObservableCollection<Product> obsProducts = new ObservableCollection<Product>(products);
}

Answer 2

您必须手动将其添加到DAL类中，但这并不难。在每个数据访问层类的顶部，添加“Implements INotifyPropertyChanged”，然后在每个属性中，在“set”中添加代码，如下所示。

Private _Book As String
Public Property Book() As String
    Get
        Return _Book
    End Get
    Set(ByVal value As String)
        If Not _Book = value Then
            _Book = value
            ' Raise the property changed event.
            RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs("Book"))
        End If
    End Set
End Property 

Public Event PropertyChanged(ByVal sender As Object, ByVal e As System.ComponentModel.PropertyChangedEventArgs) Implements System.ComponentModel.INotifyPropertyChanged.PropertyChanged

从SubSonic 2.2集合创建WPF ObservableCollection

2 个答案: