[C#] Winform 抓取所有開啟的Internet Explorer 開啟的網頁，並且抓到那網頁的原始碼
2017-05-19
根據上篇文章 [C#] 透過 Win32 EnumWindows 和 GetWindowText 取得所有執行程式的hWnd還有標題 我們來抓取到開啟的應用程式，這一篇我們繼續聊聊，抓到開啟的IE 並且抓取開啟網頁的原始碼，其中抓取到IE 的hWnd的部分，可以參考[C#] 透過 Win32 EnumWindows 和 GetWindowText 取得所有執行程式的hWnd還有標題 這篇文章，結果的畫面是長這樣
1. 抓取 所有開啟的IE ，根據上篇文章 ，我們只要搜尋 GetWindowText 帶有 Internet Explorer
private bool ShowIEWindowHandler(int hWnd, int lParam) { string mystring; StringBuilder text = new StringBuilder(255); GetWindowText(hWnd, text, 255); mystring = text.ToString(); if (mystring.Contains("Internet Explorer")) { listBox1.Items.Insert(0, text + "," + hWnd); } return true; }
2. 因為我們要抓取該hWnd 其中子項目的 Internet Explorer_Server 類型的hWnd 送指令 取抓取source 轉成 IHTMLDocument 這時候
引入win32 介面 :
[DllImport("user32.dll", EntryPoint = "GetClassNameA")] public static extern int GetClassName(IntPtr hwnd, StringBuilder lpClassName, int nMaxCount); /*delegate to handle EnumChildWindows*/ public delegate int EnumProc(IntPtr hWnd, ref IntPtr lParam); [DllImport("user32.dll")] public static extern int EnumChildWindows(IntPtr hWndParent, EnumProc lpEnumFunc, ref IntPtr lParam); [DllImport("user32.dll", EntryPoint = "RegisterWindowMessageA")] public static extern int RegisterWindowMessage(string lpString); [DllImport("user32.dll", EntryPoint = "SendMessageTimeoutA")] public static extern int SendMessageTimeout(IntPtr hwnd, int msg, int wParam, int lParam, int fuFlags, int uTimeout, out int lpdwResult); [DllImport("OLEACC.dll")] public static extern int ObjectFromLresult(int lResult, ref Guid riid, int wParam, ref IHTMLDocument2 ppvObject); public const int SMTO_ABORTIFHUNG = 0x2; public Guid IID_IHTMLDocument = new Guid("626FC520-A41E-11CF-A731-00A0C9082637");
3. 抓取 Internet Explorer_Server class 的 hWnd :
private int EnumWindows(IntPtr hWnd, ref IntPtr lParam) { int retVal = 1; StringBuilder classname = new StringBuilder(128); GetClassName(hWnd, classname, classname.Capacity); if ((bool)(string.Compare(classname.ToString(), "Internet Explorer_Server") == 0)) { lParam = hWnd; retVal = 0; } return retVal; }
4. 送指令 ，並且轉換成 IHTMLDocument :
private IHTMLDocument2 documentFromDOM(IntPtr hWnd) { int lngMsg = 0; int lRes; EnumProc proc = new EnumProc(EnumWindows); EnumChildWindows(hWnd, proc, ref hWnd); if (!hWnd.Equals(IntPtr.Zero)) { lngMsg = RegisterWindowMessage("WM_HTML_GETOBJECT"); if (lngMsg != 0) { SendMessageTimeout(hWnd, lngMsg, 0, 0, SMTO_ABORTIFHUNG, 1000, out lRes); if (!(bool)(lRes == 0)) { int hr = ObjectFromLresult(lRes, ref IID_IHTMLDocument, 0, ref document); if ((bool)(document == null)) { MessageBox.Show("CANNOT FOUND IHTMLDocument"); } } } } return document; }
5. 使用上面的code :
var document = documentFromDOM(new IntPtr(int.Parse(txtHwnd.Text))); if (document != null) { txtTitle.Text = document.title; txtSource.Text = document.body.innerHTML; } else { MessageBox.Show("Sorry I cant fetch it."); return; }
如果有不清楚的地方，這邊提供source code : https://github.com/donma/GetHwndAndGetSourceFromIE
如果有問題直接看code 吧
reference :http://blog.csdn.net/cz19800823/article/details/11909881