如何以编程方式按下网站的登录按钮 [英] How to press a login button of a website programmatically

问题描述

我正在将网站加载到 winform 中的 WebBrowser.我希望使用日志登录并通过 vb.net 自动通过

我在页面加载后执行以下代码

 WebBrowser1.Document.GetElementById("e").SetAttribute("value", "email@address")WebBrowser1.Document.GetElementById("p").SetAttribute("value", "password")WebBrowser1.Document.Forms(0).InvokeMember("submit")

我可以填写需要包含日志的框并通过，但我无法自动触发网页的登录按钮.经过研究，我确信我正确地复制了我找到​​的样本，但显然存在问题.没有按下按钮"，因为我什么也没发生.当我手动按下网站登录时，它会使用我填写的数据正确登录.

网页链接是https://www.weatherzone.com.au/customise.jsp

相关源数据如下

 
<div style="margin-bottom: 1em;"><label for="e">输入您的电子邮件地址:</label><输入样式="宽度:95%;"type="text" name="e" id="e"/><br/>

<div style="margin-bottom: 1em;"><label for="p">输入您的密码:</label><输入样式="宽度:95%;"type="password" name="p" id="p"/><br/>

<div style="margin-bottom: 1em;"><input type="checkbox" name="rmbr" id="rmbr" value="1"/><label for="rmbr" style="display: inline;">记住我(如果您是这台计算机的普通用户，请选中此框)</label>

<div style="text-align: right; margin-top: 20px; padding-top: 10px; border-top: 1px solid silver;"><input class="submit btn" type="submit" name="target" value="login"/>

<input type="hidden" name="dest" value="/"/></表单>

解决方案

我应用了这个逻辑:

• 将代码放入 DocumentCompleted 事件中，以便在文档完成后运行代码.
• 当 iframe 文档完成时，DocumentCompleted 也会引发，因此要摆脱 iframe，请使用诸如将 e.Url 与基本 url 进行比较的标准.
• 按名称找到提交按钮并点击它.

而且它工作正常.它重定向到相同的 url 并显示一条红色的未经身份验证的消息.

代码:

Private Sub WebBrowser1_DocumentCompleted(sender As Object, e As WebBrowserDocumentCompletedEventArgs) 处理 WebBrowser1.DocumentCompleted如果 (e.Url.ToString().StartsWith("https://www.weatherzone.com.au")) 然后WebBrowser1.Document.GetElementById("e").SetAttribute("value", "[e-mail]")WebBrowser1.Document.GetElementById("p").SetAttribute("value", "password")WebBrowser1.Document.All().GetElementsByName("target").Cast(Of HtmlElement).First().InvokeMember("click")万一结束子Private Sub Form1_Load(sender As Object, e As EventArgs) 处理 MyBase.LoadMe.WebBrowser1.Navigate("https://www.weatherzone.com.au/customise.jsp")结束子

为了使代码更稳定，添加必要的空检查.

I am loading a website into a WebBrowser in a winform. I wish to login using a log and pass automatically via vb.net

I have the following code executing once the page loads

 WebBrowser1.Document.GetElementById("e").SetAttribute("value", "email@address")
                WebBrowser1.Document.GetElementById("p").SetAttribute("value", "password")
                WebBrowser1.Document.Forms(0).InvokeMember("submit")

I am able to fill in the boxes that need to contain the Log and pass but I am not able to fire off the login button of the webpage automatically. After research I am confident that I replicated the sample I found properly but obviously there is an issue. The 'button' isn't pressed because I don't get anything happening. When I press the website login manually it logs in correctly using the data that I filled in .

the webpage link is https://www.weatherzone.com.au/customise.jsp

and the relevant source data is below

 <form action="/customise.jsp" method="post" style="width: 75%; text-align: left;">
  <div style="margin-bottom: 1em;">
    <label for="e">Enter your email address:</label>
    <input style="width: 95%;" type="text" name="e" id="e" /><br />
  </div>

  <div style="margin-bottom: 1em;">
    <label for="p">Enter your password:</label>
    <input style="width: 95%;" type="password" name="p" id="p" /><br />
  </div>

  <div style="margin-bottom: 1em;">
    <input type="checkbox" name="rmbr" id="rmbr" value="1" />
    <label for="rmbr" style="display: inline;">Remember me (check this box if you are a regular user of this computer)</label>
  </div>

  <div style="text-align: right; margin-top: 20px; padding-top: 10px; border-top: 1px solid silver;">
    <input class="submit btn" type="submit" name="target" value="login" />
  </div>

  <input type="hidden" name="dest" value="/" />
</form>

解决方案

I applied this logic:

• Put the code in a DocumentCompleted event to run the code after the document completed.
• The DocumentCompleted also raises when an iframe document completed, so to get rid of iframes use a criteria like comparing e.Url with the base url know.
• Find the submit button by name and click on it.

And it worked properly. It redirected to the same url and showed a red not authenticated message.

Code:

Private Sub WebBrowser1_DocumentCompleted(sender As Object, e As WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted
    If (e.Url.ToString().StartsWith("https://www.weatherzone.com.au")) Then
        WebBrowser1.Document.GetElementById("e").SetAttribute("value", "[e-mail]")
        WebBrowser1.Document.GetElementById("p").SetAttribute("value", "password")
        WebBrowser1.Document.All().GetElementsByName("target").Cast(Of HtmlElement).First().InvokeMember("click")
    End If
End Sub

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    Me.WebBrowser1.Navigate("https://www.weatherzone.com.au/customise.jsp")
End Sub

To make the code more stable, add required null checkings.

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