Question

我在C＃中有一个代码片段，我想将其转换为VB.Net

public class ModuleAViewOne : UserControl
{
    public ModuleAViewOne(ModuleAViewOneViewModel model)
    {
        InitializeComponent();

        this.Loaded += (s, e) =>
        {
            this.DataContext = model;
        }
    }
}

我用这种方式将其转换为VB.Net

Partial Public Class ModuleAViewOne
 Inherits UserControl

Public Sub New(ByVal model As ModuleAViewOneViewModel)
        InitializeComponent()

        Me.model = model

        AddHandler Loaded, AddressOf _Loaded
    End Sub

    Dim model As ModuleAViewOneViewModel

    Private Sub _Loaded(ByVal s As Object, ByVal e As RoutedEventArgs)
        DataContext = model
    End Sub
End Class

但是可以在构造函数中编写事件，这样我就不必创建新的全局model变量吗？

Answer 1

您可以简单地使用lambda表达式

Public Sub New(model As ModuleAViewOneViewModel)
    InitializeComponent()

    AddHandler Loaded, Sub(s, e) DataContext = model
End Sub

或者，自VB 10.0（Visual Studio 2010附带）以来，您可以使用多行lambda：

Public Sub New(model As ModuleAViewOneViewModel)
    InitializeComponent()

    AddHandler Loaded, Sub(s, e) 
                          DataContext = model
                       End Sub
End Sub

在VB.Net中添加Eventhandler就像构造函数中的C＃一样？

1 个答案: