如何通过IHTMLDocument2接口知道网页是否已经被修改过了?

深宇 2006-08-08 09:47:38

虽然有一个lastModified,但是无论有没有改变过,每次取值的结果都不一样.
通过什么方法可以知道内容是否改变呢?

...全文

609 15 打赏收藏转发到动态举报

写回复

用AI写文章

15 条回复

切换为时间正序

请发表友善的回复…

发表回复

深宇 2006-09-19

打赏
举报

十分感谢!
我现在试试!

蒋晟 2006-09-17

打赏
举报

<snip>
' *** Put this in your main class

Private m_ihcl As mshtml.IHTMLChangeLog
Private m_imc2 As mshtml.IMarkupContainer2
Private m_ihcs As mshtml.IHTMLChangeSink
Private m_cookie As UInt32

Private Sub CreateChangeLog()

' Get a handle to the current MarkupContainer
m_imc2 = DirectCast(AxWebBrowser1.Document,
mshtml.IMarkupContainer2)

' Create a new change sink
m_ihcs = New ChangeSink(Me)

' Create the change log
m_imc2.CreateChangeLog(m_ihcs, m_ihcl, 1, 1)

m_imc2.RegisterForDirtyRange(m_ihcs, m_cookie)

End Sub
</snip>

<snip>
Public Class ChangeSink

Implements mshtml.IHTMLChangeSink

Private m_Owner As Form1

Public Sub New(ByVal frm As Form1)
m_Owner = frm
End Sub

Public Sub Notify() Implements mshtml.IHTMLChangeSink.Notify

Static count As Integer = 0

count += 1

Debug.WriteLine("Notify: " & count)

End Sub

End Class
</snip>

深宇 2006-09-17

打赏
举报

试验了一下，发现这个CreateChangeLog函数需要IHTMLChangeLog和IHTMLChangeSink类型的参数。
查了很多资料都不知道如何获取这两个参数。
能否给出一个简短的例子？

深宇 2006-09-17

打赏
举报

我说的是编辑模式下的

蒋晟 2006-09-15

打赏
举报

你说的修改是编辑模式下的修改还是在浏览模式下的修改？如果是编辑模式，可以用IMarkupContainer2::CreateChangeLog来获得

深宇 2006-09-15

打赏
举报

假如是这样的话，那些HTML编辑器是如何得知网页是否被修改了呢？

蒋晟 2006-09-13

打赏
举报

在IHTMLDocument2可用之前window.onload已经加载完毕了，这时候作的修改没办法知道

richmain 2006-09-13

打赏
举报

BOOL CHtmlView::GetSource(CString& refString)
{
BOOL bRetVal = FALSE;
CComPtr<IDispatch> spDisp = GetHtmlDocument();

if (spDisp != NULL)
{
HGLOBAL hMemory;
hMemory = GlobalAlloc(GMEM_MOVEABLE, 0);
if (hMemory != NULL)
{
CComQIPtr<IPersistStreamInit> spPersistStream = spDisp;
if (spPersistStream != NULL)
{
CComPtr<IStream> spStream;
if (SUCCEEDED(CreateStreamOnHGlobal(hMemory, TRUE, &spStream)))
{
spPersistStream->Save(spStream, FALSE);

LPCTSTR pstr = (LPCTSTR) GlobalLock(hMemory);
if (pstr != NULL)
{
// Stream is always ANSI, but CString
// assignment operator will convert implicitly.

bRetVal = TRUE;
TRY
{
refString = pstr;
}
CATCH_ALL(e)
{
bRetVal = FALSE;
// DELETE_EXCEPTION(e);
}
END_CATCH_ALL

if(bRetVal == FALSE)
GlobalFree(hMemory);
else
GlobalUnlock(hMemory);
}
}
}
}
}

return bRetVal;
}

深宇 2006-09-12