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Browser web kontrol adalah kontrol mudah untuk bekerja dengan dalam Visual Studio.NET atau versi sebelumnya dari Microsoft Visual Studio. Namun, Anda dapat menemukan lebih sulit untuk menangani peristiwa kontrol browser web dalam Visual Studio.NET.
Antarmuka acara berikut memperlihatkan sebagian besar peristiwa dokumen yang Anda menangani dalam aplikasi Anda:
Mshtml.HTMLDocumentEvents2_Event
Untuk menangani acara, Anda harus membuat Anda sendiri Sub prosedur atau fungsi yang Anda dapat ketika peristiwa terjadi. Anda harus cocok dengan tanda tangan dari acara yang kebakaran. Sebagai contoh, berikut Sub prosedur menangani Gunaka mouse di atas acara dokumen:
Private Sub document_onmouseover(ByVal e As mshtml.IHTMLEventObj)
Setelah event handler di tempat, Anda harus menghubungkan acara. Anda dapat menghubungkan peristiwa setiap saat setelah DocumentComplete peristiwa pada browser web pengendalian kebakaran. Berikut adalah sintaks kait:
Kode ini panggilan AddHandler pernyataan dan menggunakan CType fungsi untuk melewati acara. The CType fungsi melemparkan objek dokumen untuk (jenis yang sesuaiMshtml.HTMLDocumentEvents2_Event), dan kemudian OnMouseOver acara berlalu dari itu. The Me.document_onmouseoverSub prosedur dilewatkan ke parameter kedua, AddressOf pernyataan, yang menyediakan alamat Anda Handler.
Dalam contoh berikut, menelusuri kontrol browser web untuk http://www.microsoft.com
(http://www.microsoft.com)
. Setelah halaman load, sampel kait OnMouseOver dan OnClick peristiwa. Sampel kemudian menambahkan teks ke kotak daftar setiap kali peristiwa kebakaran.
Mulai Visual Studio.NET.
Membuat proyek aplikasi Windows baru dalam Visual Basic.NET
Menambahkan referensi ke Microsoft.mshtml dalam proyek.
Dalam toolbox, klik General.
Klik kanan panel terbuka, dan kemudian klik Menyesuaikan Toolbox.
Pilih Microsoft Web Browser Periksa kotak, dan kemudian klik Oke.
Dalam toolbox, klik dua kali Explorer.
Dalam toolbox, klik Windows Forms, kemudian klik dua kali ListBox kontrol.
Mengatur kontrol sehingga mereka mudah untuk melihat pada formulir.
Menambahkan kode berikut ke atas AssemblyInfo.vb, menggantikan kalimat impor ada
Tambahkan kode berikut antara Kode Windows Form Designer dihasilkan dan Akhir kelas dalam tampilan kode Form1.vb
Publik
Shared dwCookie2 As Integer
Public Sub add_list(ByVal a As Object)
ListBox1.Items.Insert(0, a)
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
AxWebBrowser1.Navigate2("http://www.microsoft.com")
Dim x As IEEvents = New IEEvents(AxWebBrowser1)
x.fm = Me
End Sub
Private Sub AxWebBrowser1_Enter(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AxWebBrowser1.Enter
End Sub
Private Sub AxWebBrowser1_DocumentComplete(ByVal sender As Object, ByVal e As AxSHDocVw.DWebBrowserEvents2_DocumentCompleteEvent) Handles AxWebBrowser1.DocumentComplete
Dim doc As mshtml.HTMLDocument
doc = AxWebBrowser1.Document
AddHandler CType(doc, _
mshtml.HTMLDocumentEvents2_Event).onclick, AddressOf Document_onclick
AddHandler CType(doc, _
mshtml.HTMLDocumentEvents2_Event).onmouseover, AddressOf Document_onmouseover
End Sub
Private Sub AxWebBrowser1_BeforeNavigate2(ByVal sender As Object, ByVal e As AxSHDocVw.DWebBrowserEvents2_BeforeNavigate2Event) Handles AxWebBrowser1.BeforeNavigate2
Dim doc As mshtml.HTMLDocument
doc = AxWebBrowser1.Document
RemoveHandler CType(doc, _
mshtml.HTMLDocumentEvents2_Event).onclick, _
AddressOf Document_onclick
RemoveHandler CType(doc, _
mshtml.HTMLDocumentEvents2_Event).onmouseover, _
AddressOf Document_onmouseover
End Sub
Private Sub Document_onmouseover(ByVal e As mshtml.IHTMLEventObj)
ListBox1.Items.Insert(0, "onMouseOver: " & _
e.srcElement.tagName.ToString())
End Sub
Private Function Document_onclick(ByVal e As mshtml.IHTMLEventObj) _
As Boolean
ListBox1.Items.Insert(0, "onClick: " & _
e.srcElement.tagName.ToString())
Return True
End Function
Tambahkan kode berikut setelah Akhir kelas
Public Class IEHTMLDocumentEvents
Implements mshtml.HTMLDocumentEvents2
Public Sub onactivate(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.onactivate
End Sub
Public Sub onafterupdate(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.onafterupdate
End Sub
Public Function onbeforeactivate(ByVal pEvtObj As mshtml.IHTMLEventObj) As Boolean Implements mshtml.HTMLDocumentEvents2.onbeforeactivate
Return True
End Function
Public Function onbeforedeactivate(ByVal pEvtObj As mshtml.IHTMLEventObj) As Boolean Implements mshtml.HTMLDocumentEvents2.onbeforedeactivate
Return True
End Function
Public Sub onbeforeeditfocus(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.onbeforeeditfocus
End Sub
Public Function onbeforeupdate(ByVal pEvtObj As mshtml.IHTMLEventObj) As Boolean Implements mshtml.HTMLDocumentEvents2.onbeforeupdate
Return True
End Function
Public Sub oncellchange(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.oncellchange
End Sub
Public Function onclick(ByVal pEvtObj As mshtml.IHTMLEventObj) As Boolean Implements mshtml.HTMLDocumentEvents2.onclick
Return True
End Function
Public Function oncontextmenu(ByVal pEvtObj As mshtml.IHTMLEventObj) As Boolean Implements mshtml.HTMLDocumentEvents2.oncontextmenu
Return True
End Function
Public Function oncontrolselect(ByVal pEvtObj As mshtml.IHTMLEventObj) As Boolean Implements mshtml.HTMLDocumentEvents2.oncontrolselect
Return True
End Function
Public Sub ondataavailable(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.ondataavailable
End Sub
Public Sub ondatasetchanged(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.ondatasetchanged
End Sub
Public Sub ondatasetcomplete(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.ondatasetcomplete
End Sub
Public Function ondblclick(ByVal pEvtObj As mshtml.IHTMLEventObj) As Boolean Implements mshtml.HTMLDocumentEvents2.ondblclick
Return True
End Function
Public Sub ondeactivate(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.ondeactivate
End Sub
Public Function ondragstart(ByVal pEvtObj As mshtml.IHTMLEventObj) As Boolean Implements mshtml.HTMLDocumentEvents2.ondragstart
Return True
End Function
Public Function onerrorupdate(ByVal pEvtObj As mshtml.IHTMLEventObj) As Boolean Implements mshtml.HTMLDocumentEvents2.onerrorupdate
Return True
End Function
Public Sub onfocusin(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.onfocusin
End Sub
Public Sub onfocusout(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.onfocusout
End Sub
Public Function onhelp(ByVal pEvtObj As mshtml.IHTMLEventObj) As Boolean Implements mshtml.HTMLDocumentEvents2.onhelp
Return True
End Function
Public Sub onkeydown(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.onkeydown
End Sub
Public Function onkeypress(ByVal pEvtObj As mshtml.IHTMLEventObj) As Boolean Implements mshtml.HTMLDocumentEvents2.onkeypress
Return True
End Function
Public Sub onkeyup(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.onkeyup
End Sub
Public Sub onmousedown(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.onmousedown
End Sub
Public Sub onmousemove(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.onmousemove
End Sub
Public Sub onmouseout(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.onmouseout
End Sub
Public Sub onmouseover(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.onmouseover
End Sub
Public Sub onmouseup(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.onmouseup
End Sub
Public Function onmousewheel(ByVal pEvtObj As mshtml.IHTMLEventObj) As Boolean Implements mshtml.HTMLDocumentEvents2.onmousewheel
Return True
End Function
Public Sub onpropertychange(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.onpropertychange
End Sub
Public Sub onreadystatechange(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.onreadystatechange
End Sub
Public Sub onrowenter(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.onrowenter
End Sub
Public Function onrowexit(ByVal pEvtObj As mshtml.IHTMLEventObj) As Boolean Implements mshtml.HTMLDocumentEvents2.onrowexit
Return True
End Function
Public Sub onrowsdelete(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.onrowsdelete
End Sub
Public Sub onrowsinserted(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.onrowsinserted
End Sub
Public Sub onselectionchange(ByVal pEvtObj As mshtml.IHTMLEventObj) Implements mshtml.HTMLDocumentEvents2.onselectionchange
End Sub
Public Function onselectstart(ByVal pEvtObj As mshtml.IHTMLEventObj) As Boolean Implements mshtml.HTMLDocumentEvents2.onselectstart
Return True
End Function
Public Function onstop(ByVal pEvtObj As mshtml.IHTMLEventObj) As Boolean Implements mshtml.HTMLDocumentEvents2.onstop
Return True
End Function
End Class
Public Class IEEvents
Implements SHDocVw.DWebBrowserEvents2
Public fm As Form1
Private icp As System.Runtime.InteropServices.UCOMIConnectionPoint
Private cookie As Integer = -1
Private m_ie As AxSHDocVw.AxWebBrowser
Public Sub New(ByRef ie As AxSHDocVw.AxWebBrowser)
' Call QueryInterface for IConnectionPointContainer
m_ie = ie
Dim icpc As System.Runtime.InteropServices.UCOMIConnectionPointContainer = CType(ie.GetOcx(), System.Runtime.InteropServices.UCOMIConnectionPointContainer)
' Find the connection point for the
' DWebBrowserEvents2 source interface
Dim g As Guid = GetType(SHDocVw.DWebBrowserEvents2).GUID
icpc.FindConnectionPoint(g, icp)
'Pass a pointer to the host to the connection point
icp.Advise(Me, cookie)
' Show the browser
ie.Visible = True
Dim oURL As Object = "http://www.microsoft.com"
Dim oEmpty As Object = ""
ie.Navigate2(oURL, oEmpty, oEmpty, oEmpty, oEmpty)
End Sub
Public Sub BeforeNavigate2(ByVal pDisp As Object, ByRef URL As Object, ByRef Flags As Object, ByRef TargetFrameName As Object, ByRef PostData As Object, ByRef Headers As Object, ByRef Cancel As Boolean) Implements SHDocVw.DWebBrowserEvents2.BeforeNavigate2
End Sub
Public Sub ClientToHostWindow(ByRef CX As Integer, ByRef CY As Integer) Implements SHDocVw.DWebBrowserEvents2.ClientToHostWindow
End Sub
Public Sub CommandStateChange(ByVal Command As Integer, ByVal Enable As Boolean) Implements SHDocVw.DWebBrowserEvents2.CommandStateChange
End Sub
Public Sub DocumentComplete(ByVal pDisp As Object, ByRef URL As Object) Implements SHDocVw.DWebBrowserEvents2.DocumentComplete
Dim doc As mshtml.HTMLDocument = CType(CType(pDisp, SHDocVw.IWebBrowser2).Document, mshtml.HTMLDocument)
Dim pConPtCon As System.Runtime.InteropServices.UCOMIConnectionPointContainer = CType(doc, System.Runtime.InteropServices.UCOMIConnectionPointContainer)
Dim guid As Guid = System.Type.GetType("mshtml.HTMLDocumentEvents2").GUID
Dim pConPt As System.Runtime.InteropServices.UCOMIConnectionPoint
pConPtCon.FindConnectionPoint(guid, pConPt)
Dim d As IEHTMLDocumentEvents = New IEHTMLDocumentEvents
pConPt.Advise(d, Form1.dwCookie2)
Dim iEvent As mshtml.HTMLDocumentEvents2_Event
iEvent = CType(doc, mshtml.HTMLDocumentEvents2_Event)
AddHandler iEvent.onclick, AddressOf ClickEventHandler
AddHandler iEvent.onmouseover, AddressOf MouseOverEventHandler
End Sub
Private Function ClickEventHandler(ByVal e As mshtml.IHTMLEventObj) As Boolean
fm.add_list(e.type + ":" + e.srcElement.tagName)
Return True
End Function
Private Sub MouseOverEventHandler(ByVal e As mshtml.IHTMLEventObj)
fm.add_list(e.type + ":" + e.srcElement.tagName)
End Sub
Public Sub DownloadBegin() Implements SHDocVw.DWebBrowserEvents2.DownloadBegin
End Sub
Public Sub DownloadComplete() Implements SHDocVw.DWebBrowserEvents2.DownloadComplete
End Sub
Public Sub FileDownload(ByRef Cancel As Boolean) Implements SHDocVw.DWebBrowserEvents2.FileDownload
End Sub
Public Sub NavigateComplete2(ByVal pDisp As Object, ByRef URL As Object) Implements SHDocVw.DWebBrowserEvents2.NavigateComplete2
End Sub
Public Sub NavigateError(ByVal pDisp As Object, ByRef URL As Object, ByRef Frame As Object, ByRef StatusCode As Object, ByRef Cancel As Boolean) Implements SHDocVw.DWebBrowserEvents2.NavigateError
End Sub
Public Sub NewWindow2(ByRef ppDisp As Object, ByRef Cancel As Boolean) Implements SHDocVw.DWebBrowserEvents2.NewWindow2
End Sub
Public Sub OnFullScreen(ByVal FullScreen As Boolean) Implements SHDocVw.DWebBrowserEvents2.OnFullScreen
End Sub
Public Sub OnMenuBar(ByVal MenuBar As Boolean) Implements SHDocVw.DWebBrowserEvents2.OnMenuBar
End Sub
Public Sub OnQuit() Implements SHDocVw.DWebBrowserEvents2.OnQuit
End Sub
Public Sub OnStatusBar(ByVal StatusBar As Boolean) Implements SHDocVw.DWebBrowserEvents2.OnStatusBar
End Sub
Public Sub OnTheaterMode(ByVal TheaterMode As Boolean) Implements SHDocVw.DWebBrowserEvents2.OnTheaterMode
End Sub
Public Sub OnToolBar(ByVal ToolBar As Boolean) Implements SHDocVw.DWebBrowserEvents2.OnToolBar
End Sub
Public Sub OnVisible(ByVal Visible As Boolean) Implements SHDocVw.DWebBrowserEvents2.OnVisible
End Sub
Public Sub PrintTemplateInstantiation(ByVal pDisp As Object) Implements SHDocVw.DWebBrowserEvents2.PrintTemplateInstantiation
End Sub
Public Sub PrintTemplateTeardown(ByVal pDisp As Object) Implements SHDocVw.DWebBrowserEvents2.PrintTemplateTeardown
End Sub
Public Sub PrivacyImpactedStateChange(ByVal bImpacted As Boolean) Implements SHDocVw.DWebBrowserEvents2.PrivacyImpactedStateChange
End Sub
Public Sub ProgressChange(ByVal Progress As Integer, ByVal ProgressMax As Integer) Implements SHDocVw.DWebBrowserEvents2.ProgressChange
End Sub
Public Sub PropertyChange(ByVal szProperty As String) Implements SHDocVw.DWebBrowserEvents2.PropertyChange
End Sub
Public Sub SetSecureLockIcon(ByVal SecureLockIcon As Integer) Implements SHDocVw.DWebBrowserEvents2.SetSecureLockIcon
End Sub
Public Sub StatusTextChange(ByVal Text As String) Implements SHDocVw.DWebBrowserEvents2.StatusTextChange
End Sub
Public Sub TitleChange(ByVal Text As String) Implements SHDocVw.DWebBrowserEvents2.TitleChange
End Sub
Public Sub UpdatePageStatus(ByVal pDisp As Object, ByRef nPage As Object, ByRef fDone As Object) Implements SHDocVw.DWebBrowserEvents2.UpdatePageStatus
End Sub
Public Sub WindowClosing(ByVal IsChildWindow As Boolean, ByRef Cancel As Boolean) Implements SHDocVw.DWebBrowserEvents2.WindowClosing
End Sub
Public Sub WindowSetHeight(ByVal Height As Integer) Implements SHDocVw.DWebBrowserEvents2.WindowSetHeight
End Sub
Public Sub WindowSetLeft(ByVal Left As Integer) Implements SHDocVw.DWebBrowserEvents2.WindowSetLeft
End Sub
Public Sub WindowSetResizable(ByVal Resizable As Boolean) Implements SHDocVw.DWebBrowserEvents2.WindowSetResizable
End Sub
Public Sub WindowSetTop(ByVal Top As Integer) Implements SHDocVw.DWebBrowserEvents2.WindowSetTop
End Sub
Public Sub WindowSetWidth(ByVal Width As Integer) Implements SHDocVw.DWebBrowserEvents2.WindowSetWidth
End Sub
End Class
Proses ini adalah sama jika Anda mengotomasi Internet Explorer. Ganti AxWebBrowser1 dengan nama variabel lokal untuk Internet Explorer.
Sampel ini tidak mempertimbangkan framesets. Ketika Anda menavigasi ke bingkai, Anda mungkin tidak melihat adanya peristiwa dalam aplikasi Anda. Jika diperlukan dalam aplikasi Anda, Anda harus menambahkan kode untuk menangani bingkai kemungkinan.
Untuk informasi lebih lanjut tentang kontrol browser web, serta metode, properti, dan peristiwa-peristiwa yang WebBrowser kontrol mengekspos, merujuk pada dokumentasi MSDN berikut:
PENTING: Artikel ini diterjemahkan menggunakan perangkat lunak mesin penerjemah Microsoft dan bukan oleh seorang penerjemah. Microsoft menawarkan artikel yang diterjemahkan oleh seorang penerjemah maupun artikel yang diterjemahkan menggunakan mesin sehingga Anda akan memiliki akses ke seluruh artikel baru yang diterbitkan di Pangkalan Pengetahuan (Knowledge Base) dalam bahasa yang Anda gunakan. Namun, artikel yang diterjemahkan menggunakan mesin tidak selalu sempurna. Artikel tersebut mungkin memiliki kesalahan kosa kata, sintaksis, atau tata bahasa, hampir sama seperti orang asing yang berbicara dalam bahasa Anda. Microsoft tidak bertanggung jawab terhadap akurasi, kesalahan atau kerusakan yang disebabkan karena kesalahan penerjemahan konten atau penggunaannya oleh para pelanggan. Microsoft juga sering memperbarui perangkat lunak mesin penerjemah.
Klik disini untuk melihat versi Inggris dari artikel ini:311284
(http://support.microsoft.com/kb/311284/en-us/
)
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