描述:显示在屏幕上的 HTML 元素(矩形)的复杂结构，没有重叠，每个矩形具有不同的 HTML id 属性(因此可由 Selenium IWebDriver 和 C# 代码选择)。
目标:我需要以编程方式使用 Selenium 和 C# 在选定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
最佳答案
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;
}
}
关于javascript - Selenium:使用 C# 在 IWebElement 上触发鼠标滚轮，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/41471422/