迁移';手柄';从VB.NET到C#
我正在将一些代码从VB.NET迁移到C#(3.5) 我发现这样的结构:迁移';手柄';从VB.NET到C#,c#,vb.net,events,handles,C#,Vb.net,Events,Handles,我正在将一些代码从VB.NET迁移到C#(3.5) 我发现这样的结构: Public Event DataLoaded(ByVal sender As Object, ByVal e As EventArgs) Protected Sub Mag_Button_Load_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Mag_Button_Load.Click [..] RaiseEvent DataLoa
Public Event DataLoaded(ByVal sender As Object, ByVal e As EventArgs)
Protected Sub Mag_Button_Load_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Mag_Button_Load.Click
[..]
RaiseEvent DataLoaded(Me, EventArgs.Empty)
End Sub
[..]
'Other Class
Private Sub LoadData(ByVal sender As Object, ByVal e As System.EventArgs) Handles oData.DataLoaded
[..]
End Sub
将这种行为转化为C#的最直接的方法是什么?我建议首先使用
C#不像VB.NET那样,通过“Handles”关键字自动附加事件处理程序
//EventHandler declaration
public event EventHandler DataLoaded;
protected void Mag_Button_Load_Click(object sender, EventArgs e)
{
//Raise Event
if (DataLoaded != null) {
DataLoaded(this, EventArgs.Empty);
}
}
此外,还需要将事件处理程序分配给以下对象:
Button1.Click += Button1_Click;
protected void Button1_Click(object sender, EventArgs e)
{
//do something.
}
然而,C#也有简洁的能力做到这一点:
Button1.Click += (sender, e)=>
{
//do something
}
我认为您可能忘记了最后一段代码中lambda表达式的=>或匿名方法的委托关键字和参数类型。也可以在VB.NET中向事件添加lambda表达式,但会出现以下问题:
AddHandler Button1.Click,Sub(sender,e)'do some here
,或AddHandler按钮1。单击,Sub(发送者,e)'do some here over multiple line'结束Sub