模拟键盘输入/将字符串插入文本区域(adwords) [英] simulate keyboard input / insert string into textarea (adwords)
问题描述
我正在尝试使用 CefSharp (版本43)从https://adwords.google.com/ko/KeywordPlanner/Home
抓取关键字
I am trying to scrape keywords from https://adwords.google.com/ko/KeywordPlanner/Home
using CefSharp (version 43)
我能够以编程方式登录adwords门户.
I am able to log into the adwords portal programmatically.
但是,每当我尝试通过将element.value
,element.innerText
和element.innerHtml
分配给所需的字符串来在特定的文本区域(id="gwt-debug-keywords-text-area"
)中插入一些文本(搜索关键字)时,都不会发生.
However, whenever I try to insert some text (search keywords) into the specific textarea (id="gwt-debug-keywords-text-area"
) by assigning element.value
, element.innerText
and element.innerHtml
to the desired string, but nothing happens.
var txtElem = document.getElementById("gwt-debug-keywords-text-area");
txtElem.addEventListener("keydown", onKeyPress, false);
function onKeyPress(e) {
alert(e.keyCode);
}
function triggerKeyboardEvent(el, keyCode) {
var evt = document.createEventObject ?
document.createEventObject() : document.createEvent("Events");
if (evt.initEvent) {
evt.initEvent("keydown", true, true);
}
evt.keyCode = keyCode;
evt.which = keyCode;
el.dispatchEvent ? el.dispatchEvent(evt) : el.fireEvent("onkeydown", evt);
}
triggerKeyboardEvent(txtElem, "s".charCodeAt(0));
在上面的代码中,出现警告消息,但文本框仍然为空.
In the above code alert message is raised, yet the textbox still remains empty.
很明显,该文本区域上的键上/下事件被Google自己的大量JS代码拦截.不幸的是,Google的源代码非常混乱,对于像我这样的JS新手来说,调试和调试非常困难.遵循逻辑.
Apparently, key-up/down events on that textarea are being intercepted by google's own voluminous JS code. Unfortunately Googles sourcecode are highly obfuscated and it's very difficult for a JS-noob like me to debug & follow the logic.
如何在文本区域中插入/模拟键盘输入?
How may I insert / simulate keyboard typing into the textarea?
我尝试过的其他一些代码(另请参见注释掉的部分):
Some other code I've tried (also see the commented out sections):
var txtElem = document.getElementById("gwt-debug-keywords-text-area");
txtElem.focus();
function simulateKeyEvent(character) {
var e = new KeyboardEvent("keydown", { bubbles: true, cancelable: true, key: character.charCodeAt(0), char: character, shiftKey: false });
//var e = new KeyboardEvent("keydown", { bubbles: true, cancelable: true, key: "a".charCodeAt(0), char: "a", shiftKey: true });
return !document.getElementById("gwt-debug-keywords-text-area").dispatchEvent(e);
var evt = document.createEvent("KeyboardEvent");
/*
if (e.initKeyboardEvent) { // Chrome, IE
e.initKeyboardEvent("keydown", true, true, document.defaultView, "Enter", 0, "", false, "");
} else { // FF
e.initKeyEvent("keydown", true, true, document.defaultView, false, false, false, false, character.charCodeAt(0), 0);
}
*/
//(evt.initKeyEvent || evt.initKeyboardEvent)('keypress', true, true, document.defaultView, 0, 0, 0, 0, 0, character.charCodeAt(0));
evt.initKeyboardEvent("keypress", true, true, document.defaultView, 0, 0, 0, 0, 0, character.charCodeAt(0));
return !document.getElementById("gwt-debug-keywords-text-area").dispatchEvent(evt);
}
simulateKeyEvent("s");
这些方法都不起作用....
None of these methods work....
推荐答案
好,我找到了解决方法:
Ok, I found the solution:
function setKeywordText(text) {
var el = document.getElementById("gwt-debug-keywords-text-area");
el.value = text;
var evt = document.createEvent("Events");
evt.initEvent("change", true, true);
el.dispatchEvent(evt);
}
setKeywordText("test");
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