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c#如何在win7下设置IE代理的完美解决方案
有人还发现：在window7下， 在一个进程中， 设置和取消不能都执行，---- 要么设置，要么取消。 但如果第一次运行时，只进行设置代理，退出后再进运行，只进行取消，这是没有问题的。
简单说说中医中药网(www.yiyaojing.com)给出的解决方案：每次设置或取消代理时，都新建一个进程，在新的进程中处理，处理完之后关掉进程。
这种方法可以work，但显得很蛋疼。
所以我没采用这种方法。
最后在同城交友网(www.niyuewo.com)上找到了一个国外一大神
试了一下，完美解决。
代码如下：
using System;using System.Runtime.InteropServices;using System.ComponentModel;namespace PoshHttp{ public class Proxies { public static bool UnsetProxy() { return SetProxy(null, null); } public static bool SetProxy(string strProxy) { return SetProxy(strProxy, null); } public static bool SetProxy(string strProxy, string exceptions) { InternetPerConnOptionList list = new InternetPerConnOptionList(); int optionCount = string.IsNullOrEmpty(strProxy) ? 1 : (string.IsNullOrEmpty(exceptions) ? 2 : 3); InternetConnectionOption[] options = new InternetConnectionOption[optionCount]; // USE a proxy server ... options[0].m_Option = PerConnOption.INTERNET_PER_CONN_FLAGS; options[0].m_Value.m_Int = (int)((optionCount < 2) ? PerConnFlags.PROXY_TYPE_DIRECT : (PerConnFlags.PROXY_TYPE_DIRECT | PerConnFlags.PROXY_TYPE_PROXY)); // use THIS proxy server if (optionCount > 1) { options[1].m_Option = PerConnOption.INTERNET_PER_CONN_PROXY_SERVER; options[1].m_Value.m_StringPtr = Marshal.StringToHGlobalAuto(strProxy); // except for these addresses ... if (optionCount > 2) { options[2].m_Option = PerConnOption.INTERNET_PER_CONN_PROXY_BYPASS; options[2].m_Value.m_StringPtr = Marshal.StringToHGlobalAuto(exceptions); } } // default stuff list.dwSize = Marshal.SizeOf(list); list.szConnection = IntPtr.Zero; list.dwOptionCount = options.Length; list.dwOptionError = 0; int optSize = Marshal.SizeOf(typeof(InternetConnectionOption)); // make a pointer out of all that ... IntPtr optionsPtr = Marshal.AllocCoTaskMem(optSize * options.Length); // copy the array over into that spot in memory ... for (int i = 0; i < options.Length; ++i) { IntPtr opt = new IntPtr(optionsPtr.ToInt32() + (i * optSize)); Marshal.StructureToPtr(options[i], opt, false); } list.options = optionsPtr; // and then make a pointer out of the whole list IntPtr ipcoListPtr = Marshal.AllocCoTaskMem((Int32)list.dwSize); Marshal.StructureToPtr(list, ipcoListPtr, false); // and finally, call the API method! int returnvalue =http://www.mamicode.com/ NativeMethods.InternetSetOption(IntPtr.Zero, InternetOption.INTERNET_OPTION_PER_CONNECTION_OPTION, ipcoListPtr, list.dwSize) ? -1 : 0; if (returnvalue =http://www.mamicode.com/= 0) { // get the error codes, they might be helpful returnvalue =http://www.mamicode.com/ Marshal.GetLastWin32Error(); } // FREE the data ASAP Marshal.FreeCoTaskMem(optionsPtr); Marshal.FreeCoTaskMem(ipcoListPtr); if (returnvalue > 0) { // throw the error codes, they might be helpful throw new Win32Exception(Marshal.GetLastWin32Error()); } return (returnvalue < 0); } } #region WinInet structures [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] public struct InternetPerConnOptionList { public int dwSize; // size of the INTERNET_PER_CONN_OPTION_LIST struct public IntPtr szConnection; // connection name to set/query options public int dwOptionCount; // number of options to set/query public int dwOptionError; // on error, which option failed //[MarshalAs(UnmanagedType.)] public IntPtr options; }; [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] public struct InternetConnectionOption { static readonly int Size; public PerConnOption m_Option; public InternetConnectionOptionValue m_Value; static InternetConnectionOption() { InternetConnectionOption.Size = Marshal.SizeOf(typeof(InternetConnectionOption)); } // Nested Types [StructLayout(LayoutKind.Explicit)] public struct InternetConnectionOptionValue { // Fields [FieldOffset(0)] public System.Runtime.InteropServices.ComTypes.FILETIME m_FileTime; [FieldOffset(0)] public int m_Int; [FieldOffset(0)] public IntPtr m_StringPtr; } } #endregion #region WinInet enums // // options manifests for Internet{Query|Set}Option // public enum InternetOption : uint { INTERNET_OPTION_PER_CONNECTION_OPTION = 75 } // // Options used in INTERNET_PER_CONN_OPTON struct // public enum PerConnOption { INTERNET_PER_CONN_FLAGS = 1, // Sets or retrieves the connection type. The Value member will contain one or more of the values from PerConnFlags INTERNET_PER_CONN_PROXY_SERVER = 2, // Sets or retrieves a string containing the proxy servers. INTERNET_PER_CONN_PROXY_BYPASS = 3, // Sets or retrieves a string containing the URLs that do not use the proxy server. INTERNET_PER_CONN_AUTOCONFIG_URL = 4//, // Sets or retrieves a string containing the URL to the automatic configuration script. } // // PER_CONN_FLAGS // [Flags] public enum PerConnFlags { PROXY_TYPE_DIRECT = 0x00000001, // direct to net PROXY_TYPE_PROXY = 0x00000002, // via named proxy PROXY_TYPE_AUTO_PROXY_URL = 0x00000004, // autoproxy URL PROXY_TYPE_AUTO_DETECT = 0x00000008 // use autoproxy detection } #endregion internal static class NativeMethods { [DllImport("WinInet.dll", SetLastError = true, CharSet = CharSet.Auto)] [return: MarshalAs(UnmanagedType.Bool)] public static extern bool InternetSetOption(IntPtr hInternet, InternetOption dwOption, IntPtr lpBuffer, int dwBufferLength); }}
c#如何在win7下设置IE代理的完美解决方案
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