WebBrowser component not showing CSS 3

2020-05-27 05:06发布

站内文章 / C#
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问题:

I am building a piece of software that requires a WebBrowser component. Unfortunately it won't show my page correctly.

My content uses this CSS style:

.content_mid{
background-image:url(http://img.awesome-o.net/Content_Mid.png);
background-size: 100% 100%;
vertical-align:text-top;
padding-left: 40px;
padding-right:20px;
min-height:400px; 
}

Since I already found out the WebBrowser component uses the installed version of interwebs explorer, I checked the html on Internet Explorer, and it shows perfectly.

Here you see what it shows on IE:

And here is how it displays on the webbrowser component:

So, I checked the browser version:

Debug.WriteLine("WebBrowser version: " + webBrowser1.Version);
output: WebBrowser version: 9.0.8112.16443

So that should be alright I guess.

回答1:

This page describes how to force the browser control to use a specific render mode.

You can also try this doctype:

<!DOCTYPE html>

And/Or this meta element in the head element:

<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />


回答2:

Just for further reference to other people needing this:

First of all: Thanks to Boo & Lex Li For helping me find the answer to my question.

You have to set a certain registry to the right value:

There are two different sets of keys for 32 bit and 64 bit applications.

32 bit:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\MAIN\FeatureControl\FEATURE_BROWSER_EMULATION

Value Key: yourapplication.exe

64 bit:

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\MAIN\FeatureControl\FEATURE_BROWSER_EMULATION

Value Key: yourapplication.exe

The value to set this key to is (taken from MSDN here) as decimal values:

9999 (0x270F)
Internet Explorer 9. Webpages are displayed in IE9 Standards mode, regardless of the  !DOCTYPE directive.

 9000 (0x2328)
 Internet Explorer 9. Webpages containing standards-based !DOCTYPE directives are displayed in IE9 mode.

8888 (0x22B8)
Webpages are displayed in IE8 Standards mode, regardless of the !DOCTYPE directive.

8000 (0x1F40)
Webpages containing standards-based !DOCTYPE directives are displayed in IE8 mode.

7000 (0x1B58)
Webpages containing standards-based !DOCTYPE directives are displayed in IE7 Standards mode.

Even tough MSDn claims that 9000 is the automatically assigned value. Apperently this is simply not true.

Below you can find the code how to add these keys to your registry. Please not that your application has a different processname when you debug.

RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Internet Explorer\MAIN\FeatureControl\FEATURE_BROWSER_EMULATION", true);
        if (key != null)
        {
            key.SetValue("YourApplicationName.exe", 9000, RegistryValueKind.DWord);
        }

        key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\MAIN\FeatureControl\FEATURE_BROWSER_EMULATION", true);
        if (key != null)
        {
            key.SetValue("YourApplicationName.exe", 9000, RegistryValueKind.DWord);
        }

So thanks all and Good Luck

Edit: User Account Control should be off to make this code work.



回答3:

you can also add a response header to the IIS application Called X-UA-Compatible with a value of IE=Edge. I tend to add it to my web.config



回答4:

I had the same issue and I changed this line:

<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />

to

<meta http-equiv="X-UA-Compatible" content="IE=11" />

to the latest verison of IE and it works very well.



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