vb.net用委托更新UI

想看自定义事件可转此处：http://blog.youkuaiyun.com/qq_35952946/article/details/79185511

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直接上代码：
1、单纯委托使用：

Delegate Sub wt(data As String) '定义委托

Public Class Form1

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

        Dim xc As New Threading.Thread(AddressOf betweenClass) 
        xc.Start()

    End Sub

    ''' <summary>
    ''' 被委托的中间类
    ''' </summary>
    Private Sub betweenClass()
        Me.Invoke(New wt(AddressOf changeUI), "你好") '用Invoke跨线程更新UI
    End Sub

    Private Sub changeUI(data As String) '这里要和委托定义时的参数保持一致
        Label1.Text = data
    End Sub
End Class

2、自定义事件 加 委托更新UI

''' <summary>
''' 自定义事件 加 委托更新UI
''' 
''' 委托：原本是自己的事，但是由于某种原因自己做不了，就委托别人来帮助完成
''' </summary>

Delegate Sub wt(data As String) '定义委托---有参
'Delegate Sub wt()  '无参

Public Class Form1
    Private WithEvents eveDemo As New EveDemo '获取事件类的对象，并用WithEvents修饰

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        eveDemo.Test() '1、先调用另一个类中的方法来触发自定义事件，在事件回调方法中来用Invoke跨线程更新UI
    End Sub

    ''' <summary>
    ''' 自定义事件回调处理方法
    ''' </summary>
    ''' <param name="data"></param>
    Private Sub mEve_Eve(data As String) Handles eveDemo.Eve
        Me.Invoke(New wt(AddressOf changeUI), data) '定义委托有参数时，可在这里加参数
        'Me.Invoke(New wt(AddressOf caozuo)) ’这是无参
    End Sub

    Private Sub changeUI(data As String) '这里要和委托定义时的参数保持一致
        Label1.Text = data
    End Sub
End Class