Selenium:使用 C# 在 IWebElement 上触发鼠标滚轮
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【中文标题】Selenium:使用 C# 在 IWebElement 上触发鼠标滚轮【英文标题】:Selenium: Trigger mousewheel on an IWebElement with C# 【发布时间】:2017-05-19 04:37:40 【问题描述】:描述: 屏幕上显示的 html 元素(矩形)的复杂结构,没有重叠,每个矩形都有不同的 HTML id 属性(因此可由 Selenium IWebDriver 和 C# 代码选择)。
目标:我需要使用 Selenium 和 C# 以编程方式在 selected 矩形元素上创建和触发鼠标滚轮事件(通过 IjavascriptExecutor 或其他一些方法)。
问:如何做到这一点?谢谢
【问题讨论】:
【参考方案1】:这是我调查后的实现
//wheelTicks: negative for zoomin, positive to zoomout
public object zoomElementById(string elemId, int wheelTicks=1)
object response = null;
string myJavaScript =
// Callback (place in first!) used to notify the caller that the async callee is ready
" var callback = arguments[arguments.length - 1]; " +
" var maxIntervals = arguments[1]; " +
//ms
" var intervalDuration = 150; " +
" console.log('javascripting...', callback, arguments); " +
"var d = new Date(); " +
"var n = d.getTime(); " +
" var myZoomCenterElement = document.getElementById('" + elemId + "'); " +
// some debug output in the console
" console.log(myZoomCenterElement); " +
// *** THE CORE OF THE SOLUTION *** Creates proper WheelEvent object and triggers WheelEvent(Zoom)
" var box = myZoomCenterElement.getBoundingClientRect(); " +
" var boxMiddleX = Math.round((box.right + box.left )/2); " +
" var boxMiddleY = Math.round((box.bottom + box.top )/2); " +
" var myWheelableElement = document.getElementsByClassName('svg-tree-view')[0]; " +
" var wheelEventInitDict = " +
" 'deltaX' : 0.0, " +
" 'deltaY' : -200.0, " +
" 'deltaZ' : 0.0, " +
" 'deltaMode' : 0, " +
" 'clientX' : boxMiddleX, " +
" 'clientY' : boxMiddleY " +
" ; " +
" var myWheelEvent = new WheelEvent('wheel', wheelEventInitDict); " +
" console.log(wheelEventInitDict, boxMiddleX, boxMiddleY, myWheelEvent); " +
" var myIntervalCounter = 0; " +
" var myInterval = setInterval(function() " +
" myWheelableElement.dispatchEvent(myWheelEvent); " +
" myIntervalCounter++; " +
" if (myIntervalCounter > maxIntervals) clearInterval(myInterval); " +
" , intervalDuration); " +
" var sthToReturn = 'Returning: Nothing requested!'; " +
" var asyncAwaitInMiliSeconds = Math.ceil( 1.2 * intervalDuration * maxIntervals ); " +
// Triggers the callback (to indicate async ready)
" setTimeout( function() " +
" console.log((new Date()).getTime()-n); " +
" callback(sthToReturn); " +
" , asyncAwaitInMiliSeconds); " +
""
;
_driver.Manage().Timeouts().SetScriptTimeout(new TimeSpan(0, 0, 20));
IJavaScriptExecutor js = _driver as IJavaScriptExecutor;
try
// addititonal args(optional) to be sent to the javascript func are put after the first arg
return response = js.ExecuteAsyncScript(myJavaScript, elemId, wheelTicks);
catch(UnhandledAlertException e)
Console.WriteLine("Error Occured! \n 0", e.ToString() );
return null;
【讨论】:
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