C#webBrowser使用代理服务器的方法winform

时间:2021-10-06 01:04:25

        /// 设置代理的Api

        /// </summary>

        /// <returns></returns>

        [DllImport("wininet.dll", SetLastError = true)]

        private static extern bool InternetSetOption(IntPtr hInternet, int dwOption, IntPtr lpBuffer, int lpdwBufferLength);

 

        /// <summary>

        /// 代理IP以及端口号

        /// </summary>

        /// <param></param>

        private void RefreshIESettings(string strProxy)

        {

            const int INTERNET_OPTION_PROXY = 38;

            const int INTERNET_OPEN_TYPE_PROXY = 3;

 

            Struct_INTERNET_PROXY_INFO struct_IPI;

 

            // Filling in structure

            struct_IPI.dwAccessType = INTERNET_OPEN_TYPE_PROXY;

            struct_IPI.proxy = Marshal.StringToHGlobalAnsi(strProxy);

            struct_IPI.proxyBypass = Marshal.StringToHGlobalAnsi("local");

 

            // Allocating memory

            IntPtr intptrStruct = Marshal.AllocCoTaskMem(Marshal.SizeOf(struct_IPI));

 

            // Converting structure to IntPtr

            Marshal.StructureToPtr(struct_IPI, intptrStruct, true);

 

            bool iReturn = InternetSetOption(IntPtr.Zero, INTERNET_OPTION_PROXY, intptrStruct, Marshal.SizeOf(struct_IPI));

        }