Selenium:从文件系统拖放到WebDriver

单独使用硒是可能的，但这并不简单。它需要在页面中注入一个新的INPUT元素，以便通过SendKeys接收文件。然后，脚本需要通过向目标区域发送dragenter、dragover、drop事件来模拟丢弃。

static void Main(string[] args)
{
    var driver = new ChromeDriver();
    driver.Url = "https://react-dropzone.js.org/";
    IWebElement droparea = driver.FindElementByCssSelector("[data-preview='Basic example'] [style]");
    DropFile(droparea, @"C:'Users'florent'Desktop'capture.png");
    driver.Quit();
}
const string JS_DROP_FILE = "for(var b=arguments[0],k=arguments[1],l=arguments[2],c=b.ownerDocument,m=0;;){var e=b.getBoundingClientRect(),g=e.left+(k||e.width/2),h=e.top+(l||e.height/2),f=c.elementFromPoint(g,h);if(f&&b.contains(f))break;if(1<++m)throw b=Error('Element not interractable'),b.code=15,b;b.scrollIntoView({behavior:'instant',block:'center',inline:'center'})}var a=c.createElement('INPUT');a.setAttribute('type','file');a.setAttribute('style','position:fixed;z-index:2147483647;left:0;top:0;');a.onchange=function(){var b={effectAllowed:'all',dropEffect:'none',types:['Files'],files:this.files,setData:function(){},getData:function(){},clearData:function(){},setDragImage:function(){}};window.DataTransferItemList&&(b.items=Object.setPrototypeOf([Object.setPrototypeOf({kind:'file',type:this.files[0].type,file:this.files[0],getAsFile:function(){return this.file},getAsString:function(b){var a=new FileReader;a.onload=function(a){b(a.target.result)};a.readAsText(this.file)}},DataTransferItem.prototype)],DataTransferItemList.prototype));Object.setPrototypeOf(b,DataTransfer.prototype);['dragenter','dragover','drop'].forEach(function(a){var d=c.createEvent('DragEvent');d.initMouseEvent(a,!0,!0,c.defaultView,0,0,0,g,h,!1,!1,!1,!1,0,null);Object.setPrototypeOf(d,null);d.dataTransfer=b;Object.setPrototypeOf(d,DragEvent.prototype);f.dispatchEvent(d)});a.parentElement.removeChild(a)};c.documentElement.appendChild(a);a.getBoundingClientRect();return a;";
static void DropFile(IWebElement target, string filePath, double offsetX = 0, double offsetY = 0)
{
    if (!File.Exists(filePath))
        throw new FileNotFoundException(filePath);
    IWebDriver driver = ((RemoteWebElement)target).WrappedDriver;
    IJavaScriptExecutor jse = (IJavaScriptExecutor)driver;
    IWebElement input = (IWebElement)jse.ExecuteScript(JS_DROP_FILE, target, offsetX, offsetY);
    input.SendKeys(filePath);
}

来源：https://gist.github.com/florentbr/349b1ab024ca9f3de56e6bf8af2ac69e

前面的答案是正确的，与Chrome驱动程序完美配合，但Mozilla Gecko驱动程序可能存在问题，它会抛出org.openqa.selenium.ElementNotVisibleException

为了避免这种情况，请删除input.style.display = 'none';

如果需要使其消失，可以使用input.style.opacity = 0;。

您可以使用JSExecutor:

public void dropFile(File filePath, WebElement target, int offsetX, int offsetY) {
        if (!filePath.exists())
            throw new WebDriverException("File not found: " + filePath.toString());
        JavascriptExecutor jse = (JavascriptExecutor) driver;
        String JS_DROP_FILE =
                "var target = arguments[0]," +
                        "    offsetX = arguments[1]," +
                        "    offsetY = arguments[2]," +
                        "    document = target.ownerDocument || document," +
                        "    window = document.defaultView || window;" +
                        "" +
                        "var input = document.createElement('INPUT');" +
                        "input.type = 'file';" +
                        "input.style.display = 'none';" +
                        "input.onchange = function () {" +
                        "  var rect = target.getBoundingClientRect()," +
                        "      x = rect.left + (offsetX || (rect.width >> 1))," +
                        "      y = rect.top + (offsetY || (rect.height >> 1))," +
                        "      dataTransfer = { files: this.files };" +
                        "" +
                        "  ['dragenter', 'dragover', 'drop'].forEach(function (name) {" +
                        "    var evt = document.createEvent('MouseEvent');" +
                        "    evt.initMouseEvent(name, !0, !0, window, 0, 0, 0, x, y, !1, !1, !1, !1, 0, null);" +
                        "    evt.dataTransfer = dataTransfer;" +
                        "    target.dispatchEvent(evt);" +
                        "  });" +
                        "" +
                        "  setTimeout(function () { document.body.removeChild(input); }, 25);" +
                        "};" +
                        "document.body.appendChild(input);" +
                        "return input;";
        WebElement input = (WebElement) jse.executeScript(JS_DROP_FILE, target, offsetX, offsetY);
        input.sendKeys(filePath.getAbsoluteFile().toString());
        wait.until(ExpectedConditions.stalenessOf(input));
    }

如果您正在使用硒化物：

    public static void dragAndDropFileUpload(File file, SelenideElement target) throws IOException {
    String inputId = "seleniumDragAndDropInput";
    // Create the FileList
    executeJavaScript(inputId + "_files = [];");
        executeJavaScript(inputId + "_files.push(new File([new Blob(['" + file.getAbsolutePath() + "'], {type: '" + Files.probeContentType(file.toPath()) + "'})], '" + file.getName() + "'));");

    String targetId = target.getAttribute("id");
    // Add an id if the target doesn't have one
    if (targetId == null || targetId.isEmpty()) {
        targetId = "seleniumDragAndDropInput_target";
        executeJavaScript("sId=function(e, i){e.id = i;};sId(arguments[0], arguments[1]);", target, targetId);
    }
    // Add the item function the the FileList
    // Create the drop event and dispatch it on the target
    String initEventJS = inputId + "_files.item = function (i) {return this[i];};"
            + "var eve=document.createEvent('"HTMLEvents'");"
            + "eve.initEvent('"drop'", true, true);"
            + "eve.dataTransfer = {files:seleniumDragAndDropInput_files};"
            + "eve.preventDefault = function () {};"
            + "eve.type = '"drop'";"
            + "document.getElementById('" + targetId + "').dispatchEvent(eve);";
    executeJavaScript(initEventJS);
    if (targetId == "seleniumDragAndDropInput_target") {
        executeJavaScript("document.getElementById('seleniumDragAndDropInput_target').id = null");
    }
}