c# formApp的web browser的兼容性设置

winform的web browser默认是开启的兼容性视图，有些网站如果要求需要IE高版本，比如IE11的话，web browser会出问题，比如css文件布局不能适应等，想要解决这个问题，就需要关闭web browser的兼容性，当然，关闭了的话，在没有安装新版本ie的机器上，还是会出现问题的，所以关闭了也就是提高了对客户操作系统的要求。

下面的代码首先监测系统IE的版本信息，然后根据本机的IE版本对web browser做相应的调整。

修改web browser的默认兼容性，还是需要写入注册表信息的，具体看代码吧。

不废话了，上具体带码：

using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security;
using System.Text;
using System.Threading.Tasks;


namespace WindowsFormsApplication1.Tools
{
    class ToolsBroswerVersionSet
    {
        private const string BrowserEmulationKey = Define.InternetExplorerRootKey + @"\Main\FeatureControl\FEATURE_BROWSER_EMULATION";


            public enum BrowserEmulationVersion
            {
                Default = 0,
                Version7 = 7000,
                Version8 = 8000,
                Version8Standards = 8888,
                Version9 = 9000,
                Version9Standards = 9999,
                Version10 = 10000,
                Version10Standards = 10001,
                Version11 = 11000,
                Version11Edge = 11001
            }


            public static int GetInternetExplorerMajorVersion()
            {
                int result;

                result = 0;

                try
                {
                    RegistryKey key;

                    key = Registry.LocalMachine.OpenSubKey(Define.InternetExplorerRootKey);

                    if (key != null)
                    {
                        object value;

                        value = key.GetValue("svcVersion", null) ?? key.GetValue("Version", null);

                        if (value != null)
                        {
                            string version;
                            int separator;

                            version = value.ToString();
                            separator = version.IndexOf('.');
                            if (separator != -1)
                            {
                                int.TryParse(version.Substring(0, separator), out result);
                            }
                        }
                    }
                }
                catch (SecurityException)
                {
                    // The user does not have the permissions required to read from the registry key.
                }
                catch (UnauthorizedAccessException)
                {
                    // The user does not have the necessary registry rights.
                }

                return result;
            }


        public static BrowserEmulationVersion GetBrowserEmulationVersion()
        {
            BrowserEmulationVersion result;

            result = BrowserEmulationVersion.Default;

            try
            {
                RegistryKey key;

                key = Registry.CurrentUser.OpenSubKey(BrowserEmulationKey, true);
                if (key != null)
                {
                    string programName;
                    object value;

                    programName = Path.GetFileName(Environment.GetCommandLineArgs()[0]);
                    value = key.GetValue(programName, null);

                    if (value != null)
                    {
                        result = (BrowserEmulationVersion)Convert.ToInt32(value);
                    }
                }
            }
            catch (SecurityException)
            {
                // The user does not have the permissions required to read from the registry key.
            }
            catch (UnauthorizedAccessException)
            {
                // The user does not have the necessary registry rights.
            }

            return result;
        }

        public static bool IsBrowserEmulationSet()
        {
            return GetBrowserEmulationVersion() != BrowserEmulationVersion.Default;
        }


        public static bool SetBrowserEmulationVersion(BrowserEmulationVersion browserEmulationVersion)
        {
            bool result;

            result = false;

            try
            {
                RegistryKey key;

                key = Registry.CurrentUser.OpenSubKey(BrowserEmulationKey, true);

                if (key != null)
                {
                    string programName;

                    programName = Path.GetFileName(Environment.GetCommandLineArgs()[0]);

                    if (browserEmulationVersion != BrowserEmulationVersion.Default)
                    {
                        // if it's a valid value, update or create the value
                        key.SetValue(programName, (int)browserEmulationVersion, RegistryValueKind.DWord);
                    }
                    else
                    {
                        // otherwise, remove the existing value
                        key.DeleteValue(programName, false);
                    }
                    result = true;
                }
            }
            catch (SecurityException)
            {
                // The user does not have the permissions required to read from the registry key.
            }
            catch (UnauthorizedAccessException)
            {
                // The user does not have the necessary registry rights.
            }

            return result;
        }

        public static bool SetBrowserEmulationVersion()
        {
            int ieVersion;
            BrowserEmulationVersion emulationCode;

            ieVersion = GetInternetExplorerMajorVersion();

            if (ieVersion >= 11)
            {
                emulationCode = BrowserEmulationVersion.Version11;
            }
            else
            {
                switch (ieVersion)
                {
                    case 10:
                        emulationCode = BrowserEmulationVersion.Version10;
                        break;
                    case 9:
                        emulationCode = BrowserEmulationVersion.Version9;
                        break;
                    case 8:
                        emulationCode = BrowserEmulationVersion.Version8;
                        break;
                    default:
                        emulationCode = BrowserEmulationVersion.Version7;
                        break;
                }
            }

            return SetBrowserEmulationVersion(emulationCode);
        }
    }
}

这里头调用的话，

if (!ToolsBroswerVersionSet.IsBrowserEmulationSet()) {                           
  ToolsBroswerVersionSet.SetBrowserEmulationVersion(); 
}

即可设置。

具体参考链接：
https://blogs.msdn.microsoft.com/patricka/2015/01/12/controlling-webbrowser-control-compatibility/

http://www.cyotek.com/blog/configuring-the-emulation-mode-of-an-internet-explorer-webbrowser-control