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问题:

I've created a Winforms app that uses a WebBrowser control; I dynamically assign its Uri. It worked fine for awhile, but now I'm getting this msg:

You seem to be using an unsupported browser. Older browsers can put your security at risk, are slow and don't work with newer Google Maps features. To access Google Maps, you'll need to update to a modern browser.

The last two words are a link, and following that link, I see:

You are currently using... IE 11

So, okay, the WebBrowser component uses IE 11; how can I change that?

My machine is set to use Chrome as its browser; perhaps the control should use whatever your current browser is? I don't know if that's possible/feasible.

UPDATE

Okay, I'm willing to give Reza's suggestion a try. But when I navigate to the specified spot in regedit, and right-click in the right pane to add a New entry, it has three options:

Key, String Value, Binary Value

I reckon the string values are the ".exe" strings, and the Binary values are the "dword" vals, but what should the "Key" values be?

回答1:

The WebBrowser control uses the same Internet Explorer version which is installed on your OS but it doesn't use the latest document mode by default and shows content in compatibility mode.

As a symptom, you can see the site in Internet Explorer, but WebBrowser control doesn't show the site correctly and for some sites it shows script error too.

Solution

You can tell the WebBrowser control to use the latest document mode without compatibility mode in WebBrowser control. You can follow instructions here to disable the setting using registry.

Apply the setting using code

If you want to apply the settings using code, run the following code once:

using (var key = Microsoft.Win32.Registry.CurrentUser.OpenSubKey(
    @"Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION",
    true))
 {
    key.SetValue(Application.ExecutablePath, 11001, Microsoft.Win32.RegistryValueKind.DWord);
    key.Close();
 }

In above code, I've used 11001 which means IE11 Edge mode.

Internet Explorer 11. Webpages are displayed in IE11 edge mode, regardless of the declared !DOCTYPE directive. Failing to declare a !DOCTYPE directive causes the page to load in Quirks.

Apply the setting manually

Open Rgistry editor and browse HKEY_CURRENT_USER, go to the following key:

Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION

Add the following values:

"YourApplicationFileName.exe"=dword:00002af9
"YourApplicationFileName.vshost.exe"=dword:00002af9

(In older versions of Visual Studio you needed to add vshost.exe value as well, when you run your program in Visual Studio.)

To create entries right click on an empty area of the right pane, then in the window which appears after selecting dword value, choose hexadecimal and enter 2af9:

In above steps, I've used 11001 which means IE11 Edge mode.

Reference

Browser Emulation

回答2:

In my case for embedded custom protocol on an application, I will allow only to browse pages served by the application, and no content from the outside, so I wanted to skip saving to the Windows Registry. When I tested after following Reza Aghaei answer and found that you can change the compatibility mode from within the content page. This will skip the need to configure a registry key, but you will have to add it to every page.

For changing the compatibility mode of a page, you must add a meta tag for it to be applied by the rendering engine:

<html>
    <head>
        <meta http-equiv="X-UA-Compatible" content="IE=Edge" />
    </head>
    <body>
    ...
    </body>
</html>

回答3:

The below procedures will add the correct key and remove it again. Call the CreateBrowserKey upon loading the form that your web browser is in. Then when closing the form, call the RemoveBrowserKey

Private Sub CreateBrowserKey(Optional ByVal IgnoreIDocDirective As Boolean = False)
    '      Dim basekey As String = Microsoft.Win32.Registry.CurrentUser.ToString
    Dim value As Int32
    '       Dim thisAppsName As String = My.Application.Info.AssemblyName & ".exe"

    ' Value reference: http://msdn.microsoft.com/en-us/library/ee330730%28v=VS.85%29.aspx
    ' IDOC Reference:  http://msdn.microsoft.com/en-us/library/ms535242%28v=vs.85%29.aspx
    Select Case (New WebBrowser).Version.Major
        Case 8
            If IgnoreIDocDirective Then
                value = 8888
            Else
                value = 8000
            End If
        Case 9
            If IgnoreIDocDirective Then
                value = 9999
            Else
                value = 9000
            End If
        Case 10
            If IgnoreIDocDirective Then
                value = 10001
            Else
                value = 10000
            End If
        Case 11
            If IgnoreIDocDirective Then
                value = 11001
            Else
                value = 11000
            End If

        Case Else
            Exit Sub
    End Select
    Microsoft.Win32.Registry.SetValue(Microsoft.Win32.Registry.CurrentUser.ToString & BrowserKeyPath, _
                                              Process.GetCurrentProcess.ProcessName & ".exe", _
                                              value, _
                                              Microsoft.Win32.RegistryValueKind.DWord)
End Sub

Private Sub RemoveBrowserKey()
    Dim key As Microsoft.Win32.RegistryKey
    key = Microsoft.Win32.Registry.CurrentUser.OpenSubKey(BrowserKeyPath.Substring(1), True)
    key.DeleteValue(Process.GetCurrentProcess.ProcessName & ".exe", False)
End Sub