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我有一个使用 Webview2 浏览器打开表单的模块。然后,Webview2 控件使用用户用户名和密码(他之前在两个文本框中输入)登录网站并通过几个链接加载到用户可以搜索客户的特定网页www.login.ca/search。在用户输入名称并单击搜索按钮后,下一页会加载一秒钟,然后再次加载www.login.ca/search页面。我只是希望用户能够继续浏览该页面,而无需浏览器重新加载“login.ca/search”网页。

我有这个:

Imports System.Windows.Interop
Imports Microsoft.Web.WebView2.Core

Module SearchForCustomer

Public Sub CheckCustomer()
    WebviewForm.Show()
    OpenAndLogIn()
End Sub

Public Sub OpenAndLogIn()

    'Open webpage and log in
    Dim Loginwebaddress As String = "https://www.login.ca"
    WebviewForm.WebView21.Source = New Uri(Loginwebaddress)

    AddHandler(WebviewForm.WebView21.NavigationCompleted), AddressOf FirstPageWebView
End Sub

Private Async Sub FirstPageWebView(ByVal sender As Object, ByVal e As CoreWebView2NavigationCompletedEventArgs)
    Dim msg = TextBox1.Text 'Username
    Dim msg2 = TextBox2.Text 'password

    Await WebviewForm.WebView21.ExecuteScriptAsync($"document.getElementById('LoginUN').value = '{msg}';")
    Await WebviewForm.WebView21.ExecuteScriptAsync($"document.getElementById('Login1PW').value = '{msg2}';")
    Await WebviewForm.WebView21.ExecuteScriptAsync($"document.getElementById('Login1_DoLogin').click();")

    AddHandler(WebviewForm.WebView21.NavigationCompleted), AddressOf LoginWebpageLoaded
End Sub

Private Sub LoginWebpageLoaded

    'Load the search for customer page
    Dim Loginwebaddress As String = "https://www.login.ca/search"

    WebviewForm.WebView21.Source = New Uri(Loginwebaddress)

End Sub
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1 回答 1

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的第一行FirstPageWebView应该再次删除处理程序,因为它应该只使用一次。

当您致电时,AddHandler您实际上已经注册了 2 个处理程序,它们将在每个NavigationCompleted事件上都运行。

(我不知道 Vb.Net 所以这段代码可能是错误的,但我希望你明白:

Private Async Sub FirstPageWebView(ByVal sender As Object, ByVal e As CoreWebView2NavigationCompletedEventArgs)
    RemoveHandler(WebviewForm.WebView21.NavigationCompleted), AddressOf LoginWebpageLoaded
    ......... more code .........
于 2022-01-13T13:52:55.470 回答