可以实现例如通过应用程序操作google搜索，用户输入要搜索的内容，然后在google中搜索；可以自动点击网页上的按钮等功能
1. 加入对Microsoft Internet Controls的引用； 2. 加入对Microsoft HTML Object Library的引用；
（要引入Microsoft.mshtml.dll 地址是C:/Program Files/Microsoft.NET/Primary Interop Assemblies） 3. 通过mshtml.IHTMLDocument2、SHDocVw.InternetExplorer、SHDocVw.ShellWindowsClass获取当前打开的google搜索页面的IE窗口句柄； 4. 根据3返回的句柄，获得当前打开的google页面的mshtml.IHTMLDocument2对象； 5. 根据4返回的IHTMLDocument2对象，获得搜索输入框和提交按钮（可查看google页面源文件，确认输入框和提交按钮的类型和名字）； 6. 在搜索输入框中输入要搜索的内容，并执行提交按钮的click动作即可进行搜索；
简单来说：
打开ie：
SHDocVw.ShellWindows shellWindows = new SHDocVw.ShellWindowsClass();object objFlags = 1;object objTargetFrameName = "";object objPostData = "";object objHeaders = "";SHDocVw.InternetExplorer webBrowser1= (SHDocVw.InternetExplorer)shellWindows.Item(shellWindows.Count-1);webBrowser1.Navigate(“http://www.google.cn”, ref objFlags, ref objTargetFrameName, ref objPostData, ref objHeaders);
(可以简略点写：object c=null; myWeb.Navigate("http://zhidao.baidu.com/",ref c,ref c,ref c,ref c); )mshtml.IHTMLDocument2 htmlDoc = webBrowser1.Document as mshtml.IHTMLDocument2;
//...获取WebBroswer中的body代码mshtml.HTMLDocumentClass doc=(mshtml.HTMLDocumentClass)myWeb.Document;mshtml.HTMLBody body=(mshtml.HTMLBody)docCC.body;string html=body.innerHTML.ToString();//...如果里面有Form，要给里面的text填充信息mshtml.IHTMLDocument2 doc2=(mshtml.IHTMLDocument2)myWeb.Document;mshtml.IHTMLElementCollection inputs;inputs=(mshtml.IHTMLElementCollection)doc2.all.tags("INPUT");mshtml.IHTMLElement element=(mshtml.IHTMLElement)inputs.item("userName",0);mshtml.IHTMLInputElement inputElement=(mshtml.IHTMLInputElement)element;inputElement.value="填充信息";//...要点击里面的某个按钮mshtml.IHTMLDocument2 doc2=(mshtml.IHTMLDocument2)myWeb.Document;mshtml.IHTMLElementCollection inputs;inputs=(mshtml.IHTMLElementCollection)doc2.all.tags("INPUT");mshtml.IHTMLElement element=(mshtml.IHTMLElement)inputs.item("SubmitBut",0);element.click();
1、根据元素ID获取元素的值。
比如要获取<img class="" id="regimg" src="/register/checkregcode.html?1287068791" width="80" height="22">这个标签里的src属性的值：
mshtml.IHTMLDocument2 doc2 = (mshtml.IHTMLDocument2)webBrowser1.Document;mshtml.IHTMLElement img = (mshtml.IHTMLElement)doc2.all.item("regimg", 0);
string imgUrl = (string)img.getAttribute("src");
2、填写表单，并确定
mshtml.IHTMLElement loginname = (mshtml.IHTMLElement)doc2.all.item("loginname", 0); mshtml.IHTMLElement loginPW = (mshtml.IHTMLElement)doc2.all.item("password", 0); mshtml.IHTMLElement loginBT = (mshtml.IHTMLElement)doc2.all.item("formsubmit", 0); mshtml.IHTMLElement loginYZ = (mshtml.IHTMLElement)doc2.all.item("regcode", 0); loginname.setAttribute("value", tbLoginName.Text); loginPW.setAttribute("value", tbLoginPassWord.Password); loginYZ.setAttribute("value", tbYZ.Text); loginBT.click();
3、获取源码
textBox1.Text = doc2.body.innerHTML;
4、执行JS
mshtml.IHTMLWindow2 win = (mshtml.IHTMLWindow2)doc2.parentWindow;win.execScript("changeRegImg()", "javascript");//使用JS
5、禁止JS，WPF下目前发现唯一适用的一种方法：
public void HideScriptErrors(WebBrowser wb, bool Hide) {
FieldInfo fiComWebBrowser = typeof(WebBrowser).GetField("_axIWebBrowser2", BindingFlags.Instance | BindingFlags.NonPublic);
if (fiComWebBrowser == null) return;
object objComWebBrowser = fiComWebBrowser.GetValue(wb);
if (objComWebBrowser == null) return;
objComWebBrowser.GetType().InvokeMember(
"Silent", BindingFlags.SetProperty, null, objComWebBrowser, new object[] { Hide });
}
void webBrowser1_Navigated(object sender, NavigationEventArgs e) {
HideScriptErrors(webBrowser1,
true);
}
下面是另外一遍博客里写的比较好的
#region Search public static void Search(string searchText) { SHDocVw.InternetExplorer ieWnd = GetIEWndOfGoogle(); mshtml.IHTMLDocument2 ieDoc = GetIEDocOfGoogle(ref ieWnd); System.Diagnostics.Trace.Assert(ieDoc != null); SearchTextInGoogle(ieDoc, searchText); //activate ie window SetForegroundWindow(ieWnd.HWND); } #endregion #region get ie window of google page public static SHDocVw.InternetExplorer GetIEWndOfGoogle() { mshtml.IHTMLDocument2 ieDoc; SHDocVw.InternetExplorer ieWnd = null; SHDocVw.ShellWindowsClass shellWindows = new SHDocVw.ShellWindowsClass(); foreach (SHDocVw.InternetExplorer ie in shellWindows) { //if it is ie window if (ie.FullName.ToUpper().IndexOf("IEXPLORE.EXE") > 0) { //get the document displayed ieDoc = (mshtml.IHTMLDocument2)ie.Document; if (ieDoc.title.ToUpper().IndexOf("GOOGLE") >= 0) { ieWnd = ie; break; } } } shellWindows = null; return ieWnd; } #endregion #region get ie document of google page public static mshtml.IHTMLDocument2 GetIEDocOfGoogle(ref SHDocVw.InternetExplorer ieWnd) { object missing = null; mshtml.IHTMLDocument2 ieDoc; if (ieWnd == null) { ieWnd = new SHDocVw.InternetExplorer(); ieWnd.Visible = true; ieWnd.Navigate("http://www.google.com", ref missing, ref missing, ref missing, ref missing); //wait for loading completed, or using DocumentComplete Event while (ieWnd.StatusText.IndexOf("完成") == -1) Application.DoEvents(); } ieDoc = (mshtml.IHTMLDocument2)ieWnd.Document; return ieDoc; } #endregion#region Search the given text in google / <summary> /// search the given text in google home page /// we can see the source file of google home page to confirm the elements we need /// the html file of google home page is as follows /// /// <table cellpadding=0 cellspacing=0> /// <tr valign=top> /// <td width=25%> </td> /// <td align=center nowrap> /// <input name=hl type=hidden value=zh-CN> /// <input autocomplete="off" maxlength=2048 name=q size=55 title="Google 搜索" value=""> /// <br> /// <input name=btnG type=submit value="Google 搜索"> /// <input name=btnI type=submit value=" 手气不错 "> /// </td> /// ... / </summary> public static void SearchTextInGoogle(mshtml.IHTMLDocument2 ieDoc, string searchText) { mshtml.HTMLInputElementClass input; //set the text to be searched foreach (mshtml.IHTMLElement ieElement in ieDoc.all) { //if its tag is input and name is q(question) if (ieElement.tagName.ToUpper().Equals("INPUT")) { input = ((mshtml.HTMLInputElementClass)ieElement); if (input.name == "q") { input.value = searchText; break; } } } //click the submit button to search foreach (mshtml.IHTMLElement ieElement in ieDoc.all) { //if its tag is input if (ieElement.tagName.ToUpper().Equals("INPUT")) { input = (mshtml.HTMLInputElementClass)ieElement; if (input.name == "btnG") { input.click(); break; } } } } #endregion
参考文章：
http://blog.csdn.net/livelylittlefish/archive/2008/08/25/2829873.aspx
http://hi.baidu.com/andyleesoft/blog/item/802e02289fcc1f94023bf66a.html
http://zhidao.baidu.com/question/48084010.html
