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How To Programmatically Save an HTML Page to Disk

This article was previously published under Q292485
This article demonstrates how to programmatically save to disk an HTML page that has been loaded into Internet Explorer without prompting the user.
More information
As a Web browser control host, or an application that is automating Internet Explorer, you may find it useful to be able to programmatically save the currently loaded document to disk without user intervention. The following code samples illustrate how to accomplish this in both Visual C++ and Visual Basic. While the Visual Basic solution also works in Visual C++, you cannot implement the Visual C++ solution in Visual Basic.

Visual Basic Solution

You can use the Internet Explorer Document Object Model to capture all of the HTML sources into a string variable. The string variable can then be written out to a text file and saved to disk.
    Dim hElm As IHTMLElement    Dim htmltext As String    Dim fso As Object    Dim file As Object            Set hElm = WebBrowser1.Document.all.tags("html").Item(0)    htmltext = hElm.outerHTML    Set fso = CreateObject("Scripting.FileSystemObject")    Set file = fso.OpenTextFile("c:\test.htm", 2, True)    file.write htmltext    file.Close    Set file = Nothing    Set fso = Nothing				

Visual C++ Solution

Accomplishing this task from a Visual C++ host is very straightforward. You can use an IWebBrowser2 interface to call the QueryInterface method for the IHTMLDocument2 interface. After you obtain a pointer to the document, then call QueryInterface for the IPersistFile interface. After you obtain this interface pointer, you can call the save method to save the file to disk.
    HRESULT          hr    = E_FAIL;    IDispatch*       pDisp = NULL;    IHTMLDocument2*  pDoc  = NULL;	    pDisp                  = m_webOC.GetDocument();   if(SUCCEEDED(hr = pDisp->QueryInterface(IID_IHTMLDocument2,(void**)&pDoc)))   {       IPersistFile*	pFile	=	NULL;       if(SUCCEEDED(pDoc->QueryInterface(IID_IPersistFile,(void**)&pFile)))       {	LPCOLESTR	file = L"c:\\test1.htm";	pFile->Save(file,TRUE);       }   }				
For additional information, click the article numbers below to view the articles in the Microsoft Knowledge Base:
206891 PRB: Value of outerHTML Does Not Match Original File
244757 How To Download a File Without Prompting
271868 BUG: IPersistStreamInit Not Available for a FRAME in a FRAMESET
For more information about the IPersistFile interface, see the following MSDN Web site:For more information about developing Web-based solutions for Microsoft Internet Explorer, visit the following Microsoft Web sites:

Article ID: 292485 - Last Review: 10/24/2012 07:33:00 - Revision: 4.0

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