如何实现Web浏览器抓取弹窗Alert中的信息？

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1. 引用using ms; // Microsoft HTML Object Library

2.[ComVisible(true)] // 允许类在COM中可见

3.public partial class Form1 : Form

4.// 激活webBrowser1_Navigated事件

5.private void webBrowser1_Navigated(object sender, WebBrowserNavigatedEventArgs e)

1.引用using mshtml; //Microsoft HTML Object Library

2.[ComVisible(true)] //放到类的上边

public partial class Form1 : Form

3.//激活webBrowser1_Navigated事件

private void webBrowser1_Navigated(object sender, WebBrowserNavigatedEventArgs e)
{
IHTMLWindow2 ihtmlWin = webBrowser1.Document.Window.DomWindow as IHTMLWindow2;
StringBuilder strAlertBuilder = new StringBuilder();
strAlertBuilder.Append("var _alert=window.alert;\n");
strAlertBuilder.Append("window.alert=function(s){\n");
strAlertBuilder.Append("window.external.alertMessage(s);}");
ihtmlWin.execScript(strAlertBuilder.ToString(), "Javascript");
}

4. //接收alert的内容

public void alertMessage(string s)
{
this.textBox1.Text = s;
}

5.关键

private void Form1_Load(object sender, EventArgs e)
{
webBrowser1.ObjectForScripting = this;//此属性是得到alert关键设置，否则可以禁止弹出，但是无法得到信息
}