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”;

 

posted @ 2017-07-12 16:46  君莫笑·秋  阅读(533)  评论(0编辑  收藏  举报