如何执行点击网页上的按钮？

Question

I'd like to click programmatically on the button when it appears on the web page, is there a way to do it?当按钮出现在网页上时，我想以编程方式单击它，有没有办法做到这一点？

here is the button, it has no ID, only this;这是按钮，它没有 ID，只有这个；

<div class="VotingButtons"><button class="VotingButton VotingButton--upvote btn-white" type="button">Like</button>

Here are more information about the button:以下是有关该按钮的更多信息：

<div class="VotingWrapper VotingWrapper--isBlocking"><p class="VotingWrapper__text"><strong>Do you like this image?</strong></p><div class="VotingButtons"><button class="VotingButton VotingButton--upvote btn-white" type="button">Like</button><button class="VotingButton VotingButton--downvote btn-white" type="button"><span class="VotingButton__text--hideOnMobile">Dislike</span></button></div></div>

I tried to use this code but it doesn't work:我尝试使用此代码但它不起作用：

private async void Btn_GoToDirectly_Click(object sender, EventArgs e)
    {
        
        var script = @"
document.getElementsByClassName('VotingButton VotingButton--upvote btn-white')[0].click();
browser.ExecuteScriptAsync(script);
    ";
            browser.ExecuteScriptAsync("document.getElementByClassName('VotingButton VotingButton--upvote btn-white').click()");

Answer 1

the string you have for the variable script has getElementsByClassName and uses the result at index 0 (seems correct), but the script you actually run has getElementByClassName , singular, which doesn't exist (and no indexer of course).. did you try to run the script variable?您用于变量脚本的字符串具有getElementsByClassName并使用索引 0 处的结果（似乎正确），但您实际运行的脚本具有getElementByClassName ，单数，它不存在（当然也没有索引器）.. 你试过吗？运行脚本变量？

    string script = @"document.getElementsByClassName('VotingButton VotingButton--upvote btn-white')[0].click();"
    browser.ExecuteScriptAsync(script);

this does everything but the cefsharp code- but if you have something like this in javascript, the code in script should work through cefsharp...除了cefsharp代码之外，这可以完成所有事情-但是如果您在javascript中有这样的东西， script的代码应该通过cefsharp工作...

 let like= function(){ console.log("like"); }; let trigger= function(){ console.log("trigger"); document.getElementsByClassName('VotingButton VotingButton--upvote btn-white')[0].click(); };

 <html> <body> <div class="VotingWrapper VotingWrapper--isBlocking"> <p class="VotingWrapper__text"> <strong>Do you like this image?</strong> </p> <div class="VotingButtons"> <button onclick="like()" class="VotingButton VotingButton--upvote btn-white" type="button">Like</button> <button class="VotingButton VotingButton--downvote btn-white" type="button"> <span class="VotingButton__text--hideOnMobile">Dislike</span> </button> </div> </div> <button onclick="trigger()" type="button">Trigger</button> </body> </html>

Answer 2

you can use selenium，你可以使用硒，

Nuget import Selenium.RC，Selenium.Support，Selenium.WebDriver, Nuget 导入 Selenium.RC，Selenium.Support，Selenium.WebDriver，

 using (IWebDriver driver = new OpenQA.Selenium.IE.InternetExplorerDriver())
     {
         driver.Navigate().GoToUrl("http://www.xxurl.com");  
         driver.FindElements(By.ClassName("VotingButton VotingButton--upvote btn-white")).Click();
     }

如何执行点击网页上的按钮？

问题描述

2 个解决方案

解决方案1
0 2020-10-20 00:49:18

解决方案2
-2 2020-10-20 00:56:34

如何执行点击网页上的按钮？

问题描述

2 个解决方案

解决方案1 0 2020-10-20 00:49:18

解决方案2 -2 2020-10-20 00:56:34

解决方案1
0 2020-10-20 00:49:18

解决方案2
-2 2020-10-20 00:56:34