VB.NET 从 Webbrowser1 抓取 URL [英] VB.NET Grab URL From Webbrowser1

问题描述

如何获取此网址并将其粘贴到文本框中?

How can i grab this url and paste it in a textbox?

注销 (Kassy Daniels) · 帮助

Logout (Kassy Daniels) · Help

从此在 webbrowser1

from this in webbrowser1

我想让它获取/logout.php?url 因为每个用户都不一样

i want it to grab the /logout.php? url cause each user is different

当您点击按钮时，只需将其粘贴到 textbox1 中

and just paste it in a textbox1 when you hit a button

推荐答案

假设你的浏览器是 WebBrowser1,

Assuming your webbrowser is WebBrowser1,

使用 WebBrowser1.Document.Links 将获得页面上所有链接的 HTMLElementCollection.

Using WebBrowser1.Document.Links will get you a HTMLElementCollection of all of the links on the page.

您可以遍历这些链接，并检查每个链接的 OuterHtml 元素(它将为您提供一个包含原始链接、ID 等的字符串)以获取您的文本寻找(在这种情况下注销?).

You can iterate through those, and check the OuterHtml element of each of those links (which will give you a string that contains the raw link, the IDs, etc.) for the text your are looking for (in this case logout?).

使用 substring 命令，提取该 URL，并消除周围的文本，然后您可以将其直接插入文本框.

Using the substring command, extract that URL, and eliminate the surrounding text, and you can plug that right into the textbox.

更新:使用 Firebug 或者你最喜欢的 DOM 工具，你可以发现注销链接在文档的根 div 中

Update: Using Firebug or your favorite DOM tool, you can find that the logout link is in the root div of the document

    Dim rootDiv As HtmlElement = WebBrowser1.Document.GetElementById("root")
    Dim links As HtmlElementCollection = rootDiv.GetElementsByTagName("a")
    Dim index As Integer
    For i As Integer = 0 To links.Count - 1
        If links(i).InnerHtml.Contains("Logout") Then
            index = i
            Exit For
        End If
    Next i

    Dim stringofLink As String = links(index).OuterHtml

如果页面结构发生变化，这应该对其具有一定的弹性，但您可能需要进一步概括它.处理 stringofLink 无论如何你想打破它(找到你需要的&然后从问号复制到那个点).

If the page changes in structure, this should be somewhat resilient to it, but you may need to generalize it further. Process stringofLink however you want to break it up (find the ampersand that you need and then copy from the question mark to that point).

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