項目－添加引用－COM，添加下面兩個：

Microsoft Internet Controls
Microsoft HTML Object Library

private void button1_Click(object sender, EventArgs e)
{
SHDocVw.InternetExplorer ie = new SHDocVw.InternetExplorer();
ie.DocumentComplete += ie_DocumentComplete;
ie.Navigate("http://www.baidu.com");
ie.Visible = true;
compWait();
mshtml.HTMLDocument doc = ie.Document;
doc.getElementById("kw").innerText = "中國";
doc.getElementById("su").click();
}
private bool ie_read = false;
private void ie_DocumentComplete(object pDisp, ref object URL) //加載完成事件
{
ie_read = true;
}
private void compWait() //等待，直到加載完成
{
while (ie_read != true)
{
Application.DoEvents();
}
}

如果網頁中沒有設置id，只能通過name查找

mshtml.IHTMLElementCollection userids = doc.getElementsByName("userid");
foreach (mshtml.IHTMLElement userid in userids)
{
userid.innerText = "USERID";
}

控制已經打開的IE瀏覽器：

public static SHDocVw.InternetExplorer getInternetExploer(string url)
{
var shell = new Shell32.Shell();
var windows = (SHDocVw.IShellWindows)shell.Windows();
SHDocVw.InternetExplorer ie;
foreach (object window in windows)
{
ie = window as SHDocVw.InternetExplorer;
if (ie != null &&
string.Equals(System.IO.Path.GetFileName(ie.FullName),
"iexplore.exe", StringComparison.CurrentCultureIgnoreCase))
{
if (ie.LocationURL == url)
{
return ie;
}
}
}
return null;
}

Frame的控制

mshtml.HTMLDocument doc2 = ie.Document;
var frame = doc2.frames.item(0);
var doc = frame.Document;
doc.getElementById...

總結

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