今天的收獲只有一項，那就是這個啦。。。
呵呵， 主要的就是用到mshtml.IHTMLChangeSink 中的 Notify方法觸發自定義的事件，具體的代碼我也不懂，嘿嘿 這些都是從 東西市 Copy 來的，亂的成粥了。

幾點核心代碼：


public class Monitor : mshtml.IHTMLChangeSink
{
// for monitor htmleditor textchanged
private Guid IMarkupContainer2GUID = typeof(mshtml.IMarkupContainer2).GUID;
　　　
private uint cookie = 0;

private mshtml.IMarkupContainer2 markupContainer;

　　 private WebBrowser webBrowser;

　　　// Event
public event Action HtmlEditorEvent;


　 public Monitor(WebBrowser webControl)

　　　{
　　　　　　this.webBrowser= webControl;
}


#region For HtmlEditor TextChanged

// always monitor
private mshtml.IMarkupContainer2 GetMarkupContainer()
{
object oDocument = this.webBrowser.Document.DomDocument;

IntPtr pDocument = Marshal.GetIUnknownForObject(oDocument);

IntPtr pMarkupContainer = IntPtr.Zero;

// pMarkupContainer is different after a call to Navigate or designMode

Marshal.QueryInterface(pDocument, ref IMarkupContainer2GUID, out pMarkupContainer);

//object oMarkupContainer = Marshal.GetObjectForIUnknown(pMarkupContainer); // This does not work

object oMarkupContainer = Marshal.GetUniqueObjectForIUnknown(pMarkupContainer);

Marshal.Release(pDocument);

Marshal.Release(pMarkupContainer);

return (mshtml.IMarkupContainer2)oMarkupContainer;

}


// only one monitor
private mshtml.IMarkupContainer2 GetMarkupContainer2()
{
return (mshtml.IMarkupContainer2)this.webBrowser.Document.DomDocument;
}


public void MonitorTextChangedAlways()
{
this.markupContainer = GetMarkupContainer();

this.markupContainer.RegisterForDirtyRange((mshtml.IHTMLChangeSink)this, out this.cookie);
}


public void StopMonitorTextChanged()
{
if (this.markupContainer != null)
{
this.markupContainer.UnRegisterForDirtyRange(this.cookie);
}
}

#endregion


#region Implement Interface

public void Notify()
{
//觸發改變事件外界去接受
if (this.HtmlEditorEvent != null)
{
this.HtmlEditorEvent();
}
}

#endregion


}

轉載于:https://www.cnblogs.com/08shiyan/archive/2011/02/18/1957995.html

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