using
System;
using System.Windows.Forms;
namespace WebBrowser
test {
p
ublic partial class Form1 : Form
{
public Form1()
{
Initialize
component();
}
PRivate void butto
n1_Click(object sender, Event
args e)
{
this.webBrowser1.
navigate(this.textBox1.Text);
}
private void button2_Click(object sender, EventArgs e)
{
VAR doc = this.webBrowser1.Document;
var frames = doc.Window.Frames;
String testValue = doc.GetElementById("search").GetAttribute("value");
frames[0].Document.GetElementById("kw").
setattribute("value", testValue);
frames[0].Document.GetElementById("su").InvokeMember("click");
}
}
}
我们运行我们的测试程序后,加载之前我们自己写的页面后,在自己的页面上输入我们要查询的词,点击测试按钮,就会看到程序报未处理 UnauthorizedAccessException错误:
IWebBrowser2这个接口来获取Ifream中的Dom,IWebBrowser2中的document可以转换为IHtmlDocument1,IHtmlDocument2,IHtmlDocument3。
using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using mshtml;
namespace WebBrowserTest
{
// 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 p
pvObject);
}
public enum OLECM
DF {
OLECMDF_DEFHIDEONCTXTMENU = 0x20,
OLECMDF_ENABLED = 2,
OLECMDF_INVISIBLE = 0
X10,
OLECMDF_LATCHED = 4,
OLECMDF_NINCHED = 8,
OLECMDF_SUPPORTED = 1
}
public enum OLECMDID
{
OLECMDID_PAGE
SETUP = 8,
OLECMDID_PRINT = 6,
OLECMDID_PRINTP
revIEW = 7,
OLECMDID_PROPERTIES = 10,
OLECMDID_SAVEAS = 4
}
public enum OLECMDEXECOPT
{
OLECMDEXECOPT_DODEFAULT,
OLECMDEXECOPT_P
romPTUSER,
OLECMDEXECOPT_DONTPROMPTUSER,
OLECMDEXECOPT_SHOWHELP
}
[ComImport, Guid("D30C1661-CDAF-11d0-8A3E-00C04
fc9E26E"), TypeLi
BType(TypeLibTypeFlags.FOleAutomation | TypeLibTypeFlags.FDual | TypeLibTypeFlags.FHidden)]
public interface IWebBrowser2
{
[DispId(100)]
void GoBack();
[DispId(0x65)]
void GoForward();
[DispId(0x66)]
void GoHome();
[DispId(0x67)]
void GoSearch();
[DispId(0x68)]
void Navigate([In] string Url, [In] ref object flags, [In] ref object targetFrameName, [In] ref object postData, [In] ref object headers);
[DispId(-550)]
void Refresh();
[DispId(0x69)]
void Refresh2([In] ref object level);
[DispId(0x6a)]
void Stop();
[DispId(200)]
object Application { [return: MarshalAs(UnmanagedType.IDispatch)] get; }
[DispId(0xc9)]
object Parent { [return: MarshalAs(UnmanagedType.IDispatch)] get; }
[DispId(0xca)]
object Container { [return: MarshalAs(UnmanagedType.IDispatch)] get; }
[DispId(0xcb)]
object Document { [return: MarshalAs(UnmanagedType.IDispatch)] get; }
[DispId(0xcc)]
bool TopLevelContainer { get; }
[DispId(0xcd)]
string Type { get; }
[DispId(0xce)]
int Left { get; set; }
[DispId(0x
CF)]
int Top { get; set; }
[DispId(0xd0)]
int Width { get; set; }
[DispId(0xd1)]
int Height { get; set; }
[DispId(210)]
string LocationName { get; }
[DispId(0xd3)]
string LocationURL { get; }
[DispId(0xd4)]
bool Busy { get; }
[DispId(300)]
void Quit();
[DispId(0x12d)]
void ClientToWindow(out int pcx, out int pcy);
[DispId(0x12e)]
void PutProperty([In] string property, [In] object vtValue);
[DispId(0x12f)]
object GetProperty([In] string property);
[DispId(0)]
string Name { get; }
[DispId(-515)]
int HWND { get; }
[DispId(400)]
string FullName { get; }
[DispId(0x191)]
string Path { get; }
[DispId(0x192)]
bool Visible { get; set; }
[DispId(0x193)]
bool
statusbar { get; set; }
[DispId(0x194)]
string StatusText { get; set; }
[DispId(0x195)]
int ToolBar { get; set; }
[DispId(0x196)]
bool MenuBar { get; set; }
[DispId(0x197)]
bool FullScreen { get; set; }
[DispId(500)]
void Navigate2([In] ref object URL, [In] ref object flags, [In] ref object targetFrameName, [In] ref object postData, [In] ref object headers);
[DispId(0x1f5)]
OLECMDF QueryStatusWB([In] OLECMDID cmdID);
[DispId(0x1f6)]
void ExecWB([In] OLECMDID cmdID, [In] OLECMDEXECOPT cmdexecopt, ref object pvaIn, IntPtr pvaOut);
[DispId(0x1f7)]
void ShowBrowserBar([In] ref object pvaClsid, [In] ref object pvarShow, [In] ref object pvarSize);
[DispId(-525)]
WebBrowserReadyState ReadyState { get; }
[DispId(550)]
bool Offline { get; set; }
[DispId(0x227)]
bool Silent { get; set; }
[DispId(0x228)]
bool RegisterAsBrowser { get; set; }
[DispId(0x229)]
bool RegisterAsDropTarget { get; set; }
[DispId(0x22a)]
bool TheaterMode { get; set; }
[DispId(0x22b)]
bool AddressBar { get; set; }
[DispId(0x22c)]
bool Resizable { get; set; }
}
class Cor
SSDomainHelper
{
private static Guid IID_IWebBrowserApp = new Guid("0002DF05-0000-0000-C000-000000000046");
private static Guid IID_IWebBrowser2 = new Guid("D30C1661-CDAF-11D0-8A3E-00C04FC9E26E");
// Utility for IE cross domain access
// Returns null in case of failure.
public static IHTMLDocument3 GetDocument
FromWindow(IHTMLWindow2 htmlWindow)
{
if (htmlWindow
== null)
{
return null;
}
//
First try the usual way to get the document.
try
{
IHTMLDocument2 doc = htmlWindow.document;
return (IHTMLDocument3)doc;
}
catch (COMException comEx)
{
// I think COMException won't be ever fi
red but just to be sure
...
}
catch (UnauthorizedAccessException)
{
}
catch (Exception ex)
{
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.
IWebBrowser2 browser = (IWebBrowser2)(brws);
return (IHTMLDocument3)browser.Document;
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
return null;
}
}
}
然后关于我上面的代码为什么要使用IHMLDocument3,而不是其它两个接口,因为IHMLDocument3这个接口里面定义了我需要的getElementById这个方法。
方法,然后直接在代码里面转换为你需要的类型使用就可以了,它们之间都是可以互相转化的。比如上面我用完了getElementById方法,我需要查看网页的title,那么可以将我上面的baiduDoc变量强制转为IHMLDocument2,然后就可以直接使用它的title属性了。
http://codecentrix.
http://msdn.microsoft.com/en-us/library/aa752641(v=VS.85).aspx