您好我想使用C＃程序设置IE代理，因为WebProxy类已经获得代理方法。但是没有方法可以设置它！
答案 0 :(得分：2)
以下是Googling发现的一些替代方案：
1- GlobalProxySelection
这是http://www.hccp.org/csharp-http-proxy.html
示例代码：
System.Net.Uri proxyURI = new System.Net.Uri("http://64.202.165.130:3128");
System.Net.GlobalProxySelection.Select = new System.Net.WebProxy(proxyURI);
2-关于StackOverflow的另一个讨论：Programmatically Set Browser Proxy Settings in C#
如果您只想为您的应用设置代理，请阅读它。
对于全球变化，建议查看：http://msdn.microsoft.com/en-us/library/aa384113.aspx
示例代码：
WINHTTP_PROXY_INFO proxyInfo;
// Allocate memory for string members.
proxyInfo.lpszProxy = new WCHAR[25];
proxyInfo.lpszProxyBypass = new WCHAR[25];
// Set the members of the proxy info structure.
proxyInfo.dwAccessType = WINHTTP_ACCESS_TYPE_NAMED_PROXY;
swprintf_s(proxyInfo.lpszProxy, 25, L"proxy_server");
swprintf_s(proxyInfo.lpszProxyBypass, 25, L"<local>");
// Set the default proxy configuration.
if (WinHttpSetDefaultProxyConfiguration( &proxyInfo ))
printf("Proxy Configuration Set.\n");
// Free memory allocated to the strings.
delete [] proxyInfo.lpszProxy;
delete [] proxyInfo.lpszProxyBypass;
3-使用本机代码
这是http://huddledmasses.org/setting-windows-internet-connection-proxy-from-c/
示例代码：
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 = NativeMethods.InternetSetOption(IntPtr.Zero,
InternetOption.INTERNET_OPTION_PER_CONNECTION_OPTION,
ipcoListPtr, list.dwSize) ? -1 : 0;
if (returnvalue == 0)
{ // get the error codes, they might be helpful
returnvalue = 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);
}
}
请查看链接本身以获取详细信息和解决方案的完整部分。