vb.net - 如何在VB.NET代码中触发事件？

Question

我有一个带有开始按钮的表单（允许用户根据需要反复运行进程），并且我想在加载表单时发送一个btnStart.Click事件，以便进程自动启动。
我为btnStart.Click事件提供了以下功能，但实际上如何告诉Visual Basic'假装有人单击了按钮并触发了此事件'？
我尝试过非常简单的方法，该方法本质上是可行的。但是，Visual Studio给我一个警告Variable 'sender' is used before it has been assigned a value，所以我猜想这不是真正的方法：

Dim sender As Object
btnStart_Click(sender, New EventArgs())

我也尝试使用 RaiseEvent btnStart.Click，但是会出现以下错误：

'btnStart'不是'MyProject.MyFormClass的事件

码

Imports System.ComponentModel

Partial Public Class frmProgress

    Private bw As BackgroundWorker = New BackgroundWorker

    Public Sub New()

        InitializeComponent()

        ' Set up the BackgroundWorker
        bw.WorkerReportsProgress = True
        bw.WorkerSupportsCancellation = True
        AddHandler bw.DoWork, AddressOf bw_DoWork
        AddHandler bw.ProgressChanged, AddressOf bw_ProgressChanged
        AddHandler bw.RunWorkerCompleted, AddressOf bw_RunWorkerCompleted

        ' Fire the 'btnStart.click' event when the form loads
        Dim sender As Object
        btnStart_Click(sender, New EventArgs())

    End Sub

    Private Sub btnStart_Click(sender As Object, e As EventArgs) Handles btnStart.Click

        If Not bw.IsBusy = True Then

            ' Enable the 'More >>' button on the form, as there will now be details for users to view
            Me.btnMore.Enabled = True

            ' Update the form control settings so that they correctly formatted when the processing starts
            set_form_on_start()

            bw.RunWorkerAsync()

        End If

    End Sub

    ' Other functions exist here

End Class

Answer 1

您应该将按钮作为sender发送到事件处理程序中：

btnStart_Click(btnStart, New EventArgs())