IE代理的设置与取消

要实时更新IE所有实例需调用如下API：

[DllImport("wininet.dll", SetLastError = true)]
        private static extern bool InternetSetOption(IntPtr hInternet, int dwOption, IntPtr lpBuffer, int lpdwBufferLength);

然后刷新IE设置:

private static void RefreshIESettings()
        {
            const int INTERNET_OPTION_REFRESH = 0x000025;
            const int INTERNET_OPTION_SETTINGS_CHANGED = 0x000027;
            InternetSetOption(IntPtr.Zero, INTERNET_OPTION_SETTINGS_CHANGED, IntPtr.Zero, 0);
            InternetSetOption(IntPtr.Zero, INTERNET_OPTION_REFRESH, IntPtr.Zero, 0);
        }

最后写IE在注册表中的设置即可:

public static void SetIEProxy(Proxy proxy)
        {
            string proxyIP = "";
            proxyIP=string.Format("{0}:{1}", proxy.ProxyAddr, proxy.ProxyPort);
            RegistryKey rk = Registry.CurrentUser.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Internet Settings", true);
            rk.SetValue("ProxyEnable", 1);
            rk.SetValue("ProxyServer", proxyIP);
            rk.Close();
            RefreshIESettings();
        }

        public static void CancelIEProxy()
        {
            RegistryKey rk = Registry.CurrentUser.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Internet Settings",true);
            rk.SetValue("ProxyEnable", 0);
            rk.Close();
            RefreshIESettings();
        }

public class Proxy
    {
        private string proxyName;
        private string proxyAddr;
        private int port;

        public Proxy(string name, string addr, int port)
        {
            this.proxyName = name;
            this.proxyAddr = addr;
            this.port = port;
        }

        public string ProxyName { get { return proxyName; } }
        public string ProxyAddr { get { return proxyAddr; } }
        public int ProxyPort { get { return port; } }

        public override string ToString()
        {
            return proxyName;
        }
    }