我正在使用C#的WebBrowser功能。尝试通过我的应用程序登录网站。一切都很顺利,除了当输入错误的ID或密码时,会弹出一个小消息框(设置在网页本身上),它会阻止一切直到点击“确定”。
所以问题是:有没有可能管理这个小窗口(比如读取里面的文本)?如果可以那太好了!但如果无法做到这一点,那么有没有办法通过编程使这个消息框消失?
所以问题是:有没有可能管理这个小窗口(比如读取里面的文本)?如果可以那太好了!但如果无法做到这一点,那么有没有办法通过编程使这个消息框消失?
public class Foo
{
[DllImport("user32.dll", SetLastError = true)]
static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);
[DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)]
private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
[DllImport("user32.dll", CharSet = CharSet.Auto)]
static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);
private void ClickOKButton()
{
IntPtr hwnd = FindWindow("#32770", "Message from webpage");
hwnd = FindWindowEx(hwnd, IntPtr.Zero, "Button", "OK");
uint message = 0xf5;
SendMessage(hwnd, message, IntPtr.Zero, IntPtr.Zero);
}
}
从Sires的回答中复制粘贴:https://dev59.com/fHVD5IYBdhLWcg3wHn6d#251524
private void InjectAlertBlocker() {
HtmlElement head = webBrowser1.Document.GetElementsByTagName("head")[0];
HtmlElement scriptEl = webBrowser1.Document.CreateElement("script");
IHTMLScriptElement element = (IHTMLScriptElement)scriptEl.DomElement;
string alertBlocker = "window.alert = function () { }";
element.text = alertBlocker;
head.AppendChild(scriptEl);
}
这是Saeb答案的精炼版本。Saeb的代码对我不起作用,我添加了一步激活按钮,然后再点击它。
using System;
using System.Runtime.InteropServices;
namespace IE_Automation
{
public class IEPoppupWindowClicker
{
[DllImport("user32.dll", SetLastError = true)]
static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);
[DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)]
private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
[DllImport("user32.dll", CharSet = CharSet.Auto)]
static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, int wParam, int lParam);
private const int BM_CLICK = 0xF5;
private const uint WM_ACTIVATE = 0x6;
private const int WA_ACTIVE = 1;
public void ActivateAndClickOkButton()
{
// find dialog window with titlebar text of "Message from webpage"
var hwnd = FindWindow("#32770", "Message from webpage");
if (hwnd != IntPtr.Zero)
{
// find button on dialog window: classname = "Button", text = "OK"
var btn = FindWindowEx(hwnd, IntPtr.Zero, "Button", "OK");
if (btn != IntPtr.Zero)
{
// activate the button on dialog first or it may not acknowledge a click msg on first try
SendMessage(btn, WM_ACTIVATE, WA_ACTIVE, 0);
// send button a click message
SendMessage(btn, BM_CLICK, 0, 0);
}
else
{
//Interaction.MsgBox("button not found!");
}
}
else
{
//Interaction.MsgBox("window not found!");
}
}
}
}