我相信以下VB.Net代码等效于前面的C#代码,但是VB.Net测试失败了-事件处理Lambda从未被调用。发生了什么事情?VB.Net版本-失败:
<TestFixture()> _
Public Class TestClass
<Test()> _
Public Sub EventTest()
Dim eventClass As New EventClass
Dim eventRaised As Boolean = False
AddHandler eventClass.AnEvent, Function() (eventRaised = True)
eventClass.RaiseIt()
Assert.IsTrue(eventRaised)
End Sub
End Class
Public Class EventClass
Public Event AnEvent()
Public Sub RaiseIt()
RaiseEvent AnEvent()
End Sub
End Class
C#版本 - 通过:
[TestFixture]
public class TestClass
{
[Test]
public void EventTest()
{
var eventClass = new EventClass();
var eventRaised = false;
eventClass.AnEvent += () => { eventRaised = true; };
eventClass.RaiseIt();
Assert.IsTrue(eventRaised);
}
}
public class EventClass
{
public delegate void EventHandler();
public event EventHandler AnEvent;
public void RaiseIt()
{
AnEvent();
}
}
Sub() statement1 statement2 End Sub
(总共四行)。 - svick