使用WebBrowser .NET控件放大网页
使用WebBrowser .NET控件放大网页
提问于 2009-04-10 16:59:49
在IE7中有一个内置的“缩放”功能(显示在状态栏中)，允许你放大高达400%。我在一个演示/模拟应用程序中使用WebBrowser .NET控件，需要放大一个网页。这有可能吗？
(我不想简单地为页面拍摄一张图片并放大它，因为我需要使用页面上的链接和按钮)。
如果重要的话，我正在使用.NET 2.0。
回答 6
Stack Overflow用户
回答已采纳
发布于 2009-04-10 17:08:46
似乎有一个解决方案，涉及覆盖WebBrowser中的AttachInterfaces和DetachInterfaces以获得IWebBrowser2接口，然后使用OLECMDID_OPTICAL_ZOOM调用ExecWB。
我尝试过他的sample code，它似乎可以工作；相关的(删节的)类看起来如下所示：
using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace ZoomBrowser
{
public partial class MyBrowser : WebBrowser
{
#region enums
public enum OLECMDID
{
// ...
OLECMDID_OPTICAL_ZOOM = 63,
OLECMDID_OPTICAL_GETZOOMRANGE = 64,
// ...
}
public enum OLECMDEXECOPT
{
// ...
OLECMDEXECOPT_DONTPROMPTUSER,
// ...
}
public enum OLECMDF
{
// ...
OLECMDF_SUPPORTED = 1
}
#endregion
#region IWebBrowser2
[ComImport, /*SuppressUnmanagedCodeSecurity,*/
TypeLibType(TypeLibTypeFlags.FOleAutomation |
TypeLibTypeFlags.FDual |
TypeLibTypeFlags.FHidden),
Guid("D30C1661-CDAF-11d0-8A3E-00C04FC9E26E")]
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(0xcf)] 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; }
}
#endregion
private IWebBrowser2 axIWebBrowser2;
public MyBrowser()
{
}
protected override void AttachInterfaces(
object nativeActiveXObject)
{
base.AttachInterfaces(nativeActiveXObject);
this.axIWebBrowser2 = (IWebBrowser2)nativeActiveXObject;
}
protected override void DetachInterfaces()
{
base.DetachInterfaces();
this.axIWebBrowser2 = null;
}
public void Zoom(int factor)
{
object pvaIn = factor;
try
{
this.axIWebBrowser2.ExecWB(OLECMDID.OLECMDID_OPTICAL_ZOOM,
OLECMDEXECOPT.OLECMDEXECOPT_DONTPROMPTUSER,
ref pvaIn, IntPtr.Zero);
}
catch (Exception)
{
throw;
}
}
}
}Stack Overflow用户
发布于 2013-01-10 01:24:42
简单提示：
//Zoom IN
webBrowser1.Focus();
SendKeys.Send("^{+}"); // [CTRL]+[+]
//Zoom OUT
webBrowser1.Focus();
SendKeys.Send("^-"); // [CTRL]+[-]
//Zoom 100%
webBrowser1.Focus();
SendKeys.Send("^0"); // [CTRL]+[0]Stack Overflow用户
发布于 2012-10-16 16:08:10
这对我来说很有效：
int zoomFactor = 300;
((SHDocVw.WebBrowser)webBrowser1.ActiveXInstance).ExecWB(SHDocVw.OLECMDID.OLECMDID_OPTICAL_ZOOM,
SHDocVw.OLECMDEXECOPT.OLECMDEXECOPT_DONTPROMPTUSER, zoomFactor, IntPtr.Zero);
这似乎只有在文档加载之后才能完成。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/738232
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