vb.net 由于其保护级别，它可能无法访问

Question

表格 1 代码:

Public Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

    WebBrowser1.Navigate("http://www.----------.org/login.php?")
    WaitForPageLoad()
    WebBrowser1.Document.GetElementById("username").SetAttribute("value", TextBox1.Text)
    WebBrowser1.Document.GetElementById("password").SetAttribute("value", TextBox2.Text)
    WebBrowser1.Document.GetElementById("login").InvokeMember("Click")

End Sub

模块代码:

Private Property pageready As Boolean = False

区域“页面加载功能”

Private Sub WaitForPageLoad()
    AddHandler WebBrowser1.DocumentCompleted, New WebBrowserDocumentCompletedEventHandler(AddressOf PageWaiter)
    While Not pageready
        Application.DoEvents()
    End While
    pageready = False
End Sub

Private Sub PageWaiter(ByVal sender As Object, ByVal e As WebBrowserDocumentCompletedEventArgs)
    If WebBrowser1.ReadyState = WebBrowserReadyState.Complete Then
        pageready = True
        RemoveHandler WebBrowser1.DocumentCompleted, New WebBrowserDocumentCompletedEventHandler(AddressOf PageWaiter)
    End If
End Sub

结束区域

所以我在互联网上搜索一个可以让 webbrowser1 在继续下一个代码之前完全加载的模块，我在 How to wait until WebBrowser is completely loaded in VB.NET? 找到了代码，但我在可访问性方面遇到了一些问题，(在模块 WebBrowser1.* 和主窗体上)它说没有声明，并且由于其保护级别可能无法访问。
我是编程新手，希望有人可以帮助我。

这是图片链接
http://s18.postimg.org/8qokcnzh5/Untitled.jpg

Answer 1

您的保护级别错误是因为您必须访问功能WaitForPageLoad()在您的模块中等待页面加载 来自 Form1 的按钮单击事件

Public Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    WebBrowser1.Navigate("http://www.----------.org/login.php?")
    WaitForPageLoad.WaitForPageLoad() 'Example: ModuleName.FuncionOrMethodName()
    WebBrowser1.Document.GetElementById("username").SetAttribute("value", TextBox1.Text)
    WebBrowser1.Document.GetElementById("password").SetAttribute("value", TextBox2.Text)
    WebBrowser1.Document.GetElementById("login").InvokeMember("Click")
End Sub

你需要让你的WaitForPageLoad() 公众 所以你可以从 访问它表格1 .

您需要访问您的 网络浏览器1 使用 表格1 (因为您的 WebBrowser1 位于您的 Form1

新 WaitForPageLoad()

Public Sub WaitForPageLoad()
    AddHandler Form1.WebBrowser1.DocumentCompleted, New WebBrowserDocumentCompletedEventHandler(AddressOf PageWaiter)
    While Not pageready
        Application.DoEvents()
    End While
    pageready = False
End Sub

Private Sub PageWaiter(ByVal sender As Object, ByVal e As WebBrowserDocumentCompletedEventArgs)
    If Form1.WebBrowser1.ReadyState = WebBrowserReadyState.Complete Then
        pageready = True
        RemoveHandler Form1.WebBrowser1.DocumentCompleted, New WebBrowserDocumentCompletedEventHandler(AddressOf PageWaiter)
    End If
End Sub