C#WebBrowser控件使用教程与技巧收集
先来看看常用的方法
Navigate(string urlString):浏览urlString表示的网址 Navigate(System.Uri url):浏览url表示的网址 Navigate(string urlString, string targetFrameName, byte[] postData, string additionalHeaders): 浏览urlString表示的网址,并发送postData中的消息 //(通常我们登录一个网站的时候就会把用户名和密码作为postData发送出去) GoBack():后退 GoForward():前进 Refresh():刷新 Stop():停止 GoHome():浏览主页 WebBrowser控件的常用属性: Document:获取当前正在浏览的文档 DocumentTitle:获取当前正在浏览的网页标题 StatusText:获取当前状态栏的文本 Url:获取当前正在浏览的网址的Uri ReadyState:获取浏览的状态 WebBrowser控件的常用事件: DocumentTitleChanged, CanGoBackChanged, CanGoForwardChanged, DocumentTitleChanged, ProgressChanged, ProgressChanged DocumentCompleted 页面加载完成之后的事件
1、获取非input控件的值:
webBrowser1.Document.All["控件ID"].InnerText; 或webBrowser1.Document.GetElementById("控件ID").InnerText; 或webBrowser1.Document.GetElementById("控件ID").GetAttribute("value");
2.获取input控件的值:
webBrowser1.Document.All["控件ID"].GetAttribute("value");; 或webBrowser1.Document.GetElementById("控件ID").GetAttribute("value");
3、给输入框赋值:
//输入框 user.InnerText = "myname"; password.InnerText = "123456"; webBrowser1.Document.GetElementById("password").SetAttribute("value", "Welcome123");
4、下拉、复选、多选:
//下拉框: secret.SetAttribute("value", "question1"); //复选框 rememberme.SetAttribute("Checked", "True"); //多选框 cookietime.SetAttribute("checked", "checked");
5、根据已知有ID的元素操作没有ID的元素:
HtmlElement btnDelete = webBrowser1.Document.GetElementById(passengerId).Parent.Parent.Parent.Parent.FirstChild.FirstChild.Children[1].FirstChild.FirstChild;
根据Parent,FirstChild,Children[1]数组,多少层级的元素都能找到。
6、获取Div或其他元素的样式:
webBrowser1.Document.GetElementById("addDiv").Style;
7、直接执行页面中的脚本函数,带动态参数或不带参数都行:
Object[] objArray = new Object[1]; objArray[0] = (Object)this.labFlightNumber.Text; webBrowser1.Document.InvokeScript("ticketbook", objArray); webBrowser1.Document.InvokeScript("return false");
8、自动点击、自动提交:
HtmlElement btnAdd = doc.GetElementById("addDiv").FirstChild; btnAdd.InvokeMember("Click");
9、自动赋值,然后点击提交按钮的时候如果出现脚本错误或一直加载的问题,一般都是点击事件执行过快,这时需要借助Timer控件延迟执行提交按钮事件:
this.timer1.Enabled = true; this.timer1.Interval = 1000 * 2; private void timer1_Tick(object sender, EventArgs e) { this.timer1.Enabled = false; ClickBtn.InvokeMember("Click");//执行按扭操作 }
10、屏蔽脚本错误:
将WebBrowser控件ScriptErrorsSuppressed设置为True即可
11、自动点击弹出提示框:
private void webBrowser1_Navigated(object sender, WebBrowserNavigatedEventArgs e) { //自动点击弹出确认或弹出提示 IHTMLDocument2 vDocument = (IHTMLDocument2)webBrowser1.Document.DomDocument; vDocument.parentWindow.execScript("function confirm(str){return true;} ", "javascript"); //弹出确认 vDocument.parentWindow.execScript("function alert(str){return true;} ", "javaScript");//弹出提示 }
12.WebBrowser页面加载完毕之后,在页面中进行一些自动化操作的时候弹出框的自动点击(屏蔽)
private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e) { //自动点击弹出确认或弹出提示 IHTMLDocument2 vDocument = (IHTMLDocument2)webBrowser1.Document.DomDocument; vDocument.parentWindow.execScript("function confirm(str){return true;} ", "javascript"); //弹出确认 vDocument.parentWindow.execScript("function alert(str){return true;} ", "javaScript");//弹出提示 //下面是你的执行操作代码 }
13、获取网页中的Iframe,并设置Iframe的src
HtmlDocument docFrame = webBrowser1.Document.Window.Frames["mainFrame"].Document; 或 HtmlDocument docFrame = webBrowser1.Document.All.Frames["mainFrame"].Document; docFrame.All["mainFrame"].SetAttribute("src", "http://www.sufeinet.com/");
网页中存在Iframe的时候webBrowser1.Url和webBrowser1_DocumentCompleted中的e.Url不一样,前者是主框架的Url,后者是当前活动框口的Url。
14、让控件聚焦
this.webBrowser1.Select(); this.webBrowser1.Focus(); doc.All["TPL_password_1"].Focus();
15、打开本地网页文件
webBrowser1.Navigate(Application.StartupPath + @"\Test.html");
16、获取元素、表单
public HtmlElement GetElement_Index(WebBrowser wb,int index) { HtmlElement e = wb.Document.All[index]; return e; } //获取form表单名name,返回表单 public HtmlElement GetElement_Form(WebBrowser wb,string form_name) { HtmlElement e = wb.Document.Forms[form_name]; return e; } //设置元素value属性的值 public void Write_value(HtmlElement e,string value) { e.SetAttribute("value", value); } //执行元素的方法,如:click,submit(需Form表单名)等 public void Btn_click(HtmlElement e,string s) { e.InvokeMember(s); }
17、获取Cookie
[DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)] static extern bool InternetGetCookieEx(string pchUrl, string pchCookieName, StringBuilder pchCookieData, ref System.UInt32 pcchCookieData, int dwFlags, IntPtr lpReserved); private static string GetCookieString(string url) { uint datasize = 1024; StringBuilder cookieData = new StringBuilder((int)datasize); if (!InternetGetCookieEx(url, null, cookieData, ref datasize, 0x2000, IntPtr.Zero)) { if (datasize < 0) return null; cookieData = new StringBuilder((int)datasize); if (!InternetGetCookieEx(url, null, cookieData, ref datasize, 0x00002000, IntPtr.Zero)) return null; } return cookieData.ToString(); } private void webBrowser1_DocumentCompleted_1(object sender, WebBrowserDocumentCompletedEventArgs e) { richTextBox1.Text = string.Empty; if (cbcookie.Checked) { if (checkBox1.Checked) { richTextBox1.Text = GetCookieString(textBox1.Text.Trim()); } else { richTextBox1.Text = webBrowser1.Document.Cookie; } } }
18、怎么设置代理
/// <summary> /// 代理结构体 /// </summary> public struct Struct_INTERNET_PROXY_INFO { public int dwAccessType; public IntPtr proxy;//IP以及端口号 public IntPtr proxyBypass; }; /// <summary> /// 设置代理的Api /// </summary> /// <returns></returns> [DllImport("wininet.dll", SetLastError = true)] private static extern bool InternetSetOption(IntPtr hInternet, int dwOption, IntPtr lpBuffer, int lpdwBufferLength); /// <summary> /// 代理IP以及端口号 /// </summary> /// <param name="strProxy"></param> private void RefreshIESettings(string strProxy) { const int INTERNET_OPTION_PROXY = 38; const int INTERNET_OPEN_TYPE_PROXY = 3; Struct_INTERNET_PROXY_INFO struct_IPI; // Filling in structure struct_IPI.dwAccessType = INTERNET_OPEN_TYPE_PROXY; struct_IPI.proxy = Marshal.StringToHGlobalAnsi(strProxy); struct_IPI.proxyBypass = Marshal.StringToHGlobalAnsi("local"); // Allocating memory IntPtr intptrStruct = Marshal.AllocCoTaskMem(Marshal.SizeOf(struct_IPI)); // Converting structure to IntPtr Marshal.StructureToPtr(struct_IPI, intptrStruct, true); bool iReturn = InternetSetOption(IntPtr.Zero, INTERNET_OPTION_PROXY, intptrStruct, Marshal.SizeOf(struct_IPI)); }
19、怎么在加载完成某个页面之后执行代码
//本事件是当每次加载完成当前页面后才会执行的 private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e) { //e.Url是当前加载的页面, if (e.Url.ToString().Contains("http://sufeinet.com")) { //执行操作1 } else if (e.Url.ToString().Contains("http://baidu.com")) { //执行操作2 } }
20、怎么禁止在新窗口中打开网页
private void webBrowser1_NewWindow(object sender, CancelEventArgs e) { string url = ((System.Windows.Forms.WebBrowser)sender).StatusText; webBrowser1.Navigate(url); e.Cancel = true; }
21.怎么设置Cookie
webBrowser1.Document.Cookie=“你的Cookie值”;
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