ユーザーが Web ページでフレーム/iframe をプレビューし、その要素を強調表示し、一度強調表示すると、選択した要素の div または id を取得できるブラウザー コントロールを探しています。
それを行う方法はありますか？
6384 次
3 に答える
1
クロス フレームの問題を解決するには、イベント ハンドラーをフレーム ドキュメントにアタッチする際に、コードを 1 行変更する必要があります。
IHTMLDocument2 frameDocument = (IHTMLDocument2) CrossFrame.GetDocumentFromWindow (frameWindow);
Interop.SHDocVw.dll をインクルードし、以下のクラスを追加します。
public class CrossFrame
{
// Returns null in case of failure.
public static IHTMLDocument2 GetDocumentFromWindow(IHTMLWindow2 htmlWindow)
{
if (htmlWindow == null)
{
return null;
}
// First try the usual way to get the document.
try
{
IHTMLDocument2 doc = htmlWindow.document;
return doc;
}
catch (COMException comEx)
{
// I think COMException won't be ever fired but just to be sure ...
if (comEx.ErrorCode != E_ACCESSDENIED)
{
return null;
}
}
catch (System.UnauthorizedAccessException)
{
}
catch
{
// Any other error.
return null;
}
// At this point the error was E_ACCESSDENIED because the frame contains a document from another domain.
// IE tries to prevent a cross frame scripting security issue.
try
{
// Convert IHTMLWindow2 to IWebBrowser2 using IServiceProvider.
IServiceProvider sp = (IServiceProvider)htmlWindow;
// Use IServiceProvider.QueryService to get IWebBrowser2 object.
Object brws = null;
sp.QueryService(ref IID_IWebBrowserApp, ref IID_IWebBrowser2, out brws);
// Get the document from IWebBrowser2.
SHDocVw.IWebBrowser2 browser = (SHDocVw.IWebBrowser2)(brws);
return (IHTMLDocument2)browser.Document;
}
catch
{
}
return null;
}
private const int E_ACCESSDENIED = unchecked((int)0x80070005L);
private static Guid IID_IWebBrowserApp = new Guid("0002DF05-0000-0000-C000-000000000046");
private static Guid IID_IWebBrowser2 = new Guid("D30C1661-CDAF-11D0-8A3E-00C04FC9E26E");
}
// This is the COM IServiceProvider interface, not System.IServiceProvider .Net interface!
[ComImport(), ComVisible(true), Guid("6D5140C1-7436-11CE-8034-00AA006009FA"),
InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)]
public interface IServiceProvider
{
[return: MarshalAs(UnmanagedType.I4)]
[PreserveSig]
int QueryService(ref Guid guidService, ref Guid riid, [MarshalAs(UnmanagedType.Interface)] out object ppvObject);
}
于 2012-07-28T19:37:03.773 に答える
1
別の方法があります...
using System.Runtime.InteropServices;
デリゲートを宣言する
public delegate void DOMEvent(IHTMLEventObj e);
private void webBrowser1_DocumentCompleted_1(object sender, WebBrowserDocumentCompletedEventArgs e)
{
if (this.webBrowser1.ReadyState != WebBrowserReadyState.Complete)
return;
else
{
HTMLDocument htmlDoc = (HTMLDocument)this.webBrowser1.Document.DomDocument;
DispHTMLDocument doc = (DispHTMLDocument)htmlDoc;
DOMEventHandler onmousedownhandler = new DOMEventHandler(doc);
onmousedownhandler.Handler += new DOMEvent(Mouse_Down);
doc.onmousedown = onmousedownhandler;
if (htmlDoc.frames.length > 0)
{
FramesCollection FrameList = htmlDoc.frames;
for (int i = 0; i < FrameList.length; i++)
{
object id = (object)i;
IHTMLWindow2 frameWindow = (IHTMLWindow2)FrameList.item(ref id);
HTMLDocument frameDoc = (HTMLDocument)frameWindow.document;
DispHTMLDocument frameDispDoc = (DispHTMLDocument)frameDoc;
DOMEventHandler onmousedownhand = new DOMEventHandler(frameDispDoc);
onmousedownhand.Handler += new DOMEvent(Mouse_Down);
frameDispDoc.onmousedown = onmousedownhand;
}
}
}
}
public class DOMEventHandler
{
public DOMEvent Handler;
DispHTMLDocument Document;
public DOMEventHandler(DispHTMLDocument doc)
{
this.Document = doc;
}
[DispId(0)]
public void Call()
{
Handler(Document.parentWindow.@event);
}
}
public void Mouse_Down(IHTMLEventObj e)
{
IHTMLElement element = (mshtml.IHTMLElement)e.srcElement;
label1.Text = element.id;
}
于 2012-07-29T11:24:24.967 に答える
1
答えが出ました…！このコードを試して、Web ページに存在する iframe とフレームを取得し、同じドキュメント ハンドラーを追加します。シンプルです。各フレーム/iframe にドキュメント ハンドラーを追加する必要があります。
private void webBrowser1_DocumentCompleted_1(object sender, WebBrowserDocumentCompletedEventArgs e)
{
if (this.webBrowser1.ReadyState != WebBrowserReadyState.Complete)
return;
else
{
HtmlDocument _document = webBrowser1.Document;
_document.MouseOver += new HtmlElementEventHandler(document_MouseOver);
_document.MouseLeave += new HtmlElementEventHandler(document_MouseLeave);
mshtml.HTMLDocumentEvents2_Event iEvent;
IHTMLDocument2 currentDoc = (IHTMLDocument2)webBrowser1.Document.DomDocument;
iEvent = (mshtml.HTMLDocumentEvents2_Event)currentDoc;
iEvent.onclick += new mshtml.HTMLDocumentEvents2_onclickEventHandler(clickDocumentHandler);
if (currentDoc.frames.length > 0)
{
FramesCollection FrameList = currentDoc.frames;
for (int i = 0; i < FrameList.length; i++)
{
object id = (object)i;
IHTMLWindow2 frameWindow = (IHTMLWindow2)FrameList.item(ref id);
IHTMLDocument2 frameDocument = (IHTMLDocument2)frameWindow.document;
iEvent = (mshtml.HTMLDocumentEvents2_Event)frameDocument;
iEvent.onclick += new mshtml.HTMLDocumentEvents2_onclickEventHandler(clickDocumentHandler);
}
}
}
}
private bool clickDocumentHandler(IHTMLEventObj pEvtObj)
{
IHTMLElement element = (mshtml.IHTMLElement)pEvtObj.srcElement;
label2.Text = element.id;
pEvtObj.cancelBubble = true;
pEvtObj.returnValue = false;
return false;
}
private bool clickElementHandler(IHTMLEventObj pEvtObj)
{
IHTMLElement element = (mshtml.IHTMLElement)pEvtObj.srcElement;
label1.Text = element.id;
pEvtObj.cancelBubble = true;
pEvtObj.returnValue = false;
return false;
}
private void document_MouseOver(object sender, HtmlElementEventArgs e)
{
HtmlElement element = e.FromElement;
mshtml.HTMLElementEvents2_Event iEvent;
iEvent = element.DomElement as mshtml.HTMLElementEvents2_Event;
if (iEvent == null)
return;
iEvent.onclick += new mshtml.HTMLElementEvents2_onclickEventHandler(clickElementHandler);
}
private void document_MouseLeave(object sender, HtmlElementEventArgs e)
{
HtmlElement element = e.FromElement;
mshtml.HTMLElementEvents2_Event iEvent;
iEvent = element.DomElement as mshtml.HTMLElementEvents2_Event;
if (iEvent == null)
return;
iEvent.onclick -= new mshtml.HTMLElementEvents2_onclickEventHandler(clickElementHandler);
}
于 2012-07-28T12:42:40.297 に答える