如何使用C#以编程方式更改Windows 7 LAN设置
本文关键字：Windows LAN 设置 方式更 何使用 编程 | 更新日期: 2023-09-27 18:23:48
知道如何使用C#为Windows 7执行以下操作吗？
Control Panel->Internet Options->Connections>LAN Settings检查或取消检查CheckBox，即Use a Proxy server for your LAN
下面是一个我适合这样做的类，使用InternetSetOption和InternetQueryOption的正确方式（无需编辑注册表），包括通知操作系统和应用程序更改，因此无需重新启动。
public class InternetSettings
{
public static bool GetProxyEnabled()
{
InternetPerConnOptionList request = new InternetPerConnOptionList();
InternetPerConnOption[] options = new InternetPerConnOption[1];
IntPtr optionsPtr = IntPtr.Zero;
try
{
options[0].dwOption = OptionType.INTERNET_PER_CONN_FLAGS;
request.dwSize = Marshal.SizeOf(typeof(InternetPerConnOptionList));
request.pszConnection = IntPtr.Zero;
request.dwOptionCount = options.Length;
request.dwOptionError = 0;
int optionSize = Marshal.SizeOf(options[0]);
optionsPtr = Marshal.AllocCoTaskMem(optionSize * options.Length);
if (optionsPtr == IntPtr.Zero)
{
return false;
}
for (int i = 0; i < options.Length; i++)
{
IntPtr optionPtr = new IntPtr(optionsPtr.ToInt32() + (i * optionSize));
Marshal.StructureToPtr(options[i], optionPtr, false);
}
request.pOptions = optionsPtr;
int requestLength = request.dwSize;
bool result = NativeMethods.InternetQueryOption(IntPtr.Zero, InternetOptionActions.INTERNET_OPTION_PER_CONNECTION_OPTION, ref request, ref requestLength);
if (!result)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
else
{
for (int i = 0; i < options.Length; i++)
{
IntPtr opt = new IntPtr(optionsPtr.ToInt32() + (i * optionSize));
options[i] = (InternetPerConnOption)Marshal.PtrToStructure(opt, typeof(InternetPerConnOption));
}
return ((ProxyFlags)options[0].Value.dwValue & ProxyFlags.PROXY_TYPE_PROXY) == ProxyFlags.PROXY_TYPE_PROXY;
}
}
finally
{
if (optionsPtr == IntPtr.Zero)
{
Marshal.FreeCoTaskMem(optionsPtr);
}
}
}
public static bool UnsetProxy()
{
InternetPerConnOptionList request = new InternetPerConnOptionList();
InternetPerConnOption[] options = new InternetPerConnOption[3];
int optionSize = 0;
IntPtr optionsPtr = IntPtr.Zero;
try
{
options[0].dwOption = OptionType.INTERNET_PER_CONN_FLAGS;
options[0].Value.dwValue = (int)ProxyFlags.PROXY_TYPE_DIRECT;
options[1].dwOption = OptionType.INTERNET_PER_CONN_PROXY_SERVER;
options[1].Value.szValue = IntPtr.Zero;
options[2].dwOption = OptionType.INTERNET_PER_CONN_PROXY_BYPASS;
options[2].Value.szValue = IntPtr.Zero;
optionSize = Marshal.SizeOf(typeof(InternetPerConnOption));
optionsPtr = Marshal.AllocCoTaskMem(optionSize * options.Length);
if (optionsPtr == IntPtr.Zero)
{
return false;
}
for (int i = 0; i < options.Length; ++i)
{
IntPtr optionPtr = new IntPtr(optionsPtr.ToInt32() + (i * optionSize));
Marshal.StructureToPtr(options[i], optionPtr, false);
}
request.pszConnection = IntPtr.Zero;
request.dwSize = Marshal.SizeOf(typeof(InternetPerConnOptionList));
request.dwOptionCount = options.Length;
request.dwOptionError = 0;
request.pOptions = optionsPtr;
int requestLength = request.dwSize;
if (NativeMethods.InternetSetOption(IntPtr.Zero, InternetOptionActions.INTERNET_OPTION_PER_CONNECTION_OPTION, ref request, requestLength))
{
NativeMethods.InternetSetOption(IntPtr.Zero, InternetOptionActions.INTERNET_OPTION_SETTINGS_CHANGED, IntPtr.Zero, 0);
NativeMethods.InternetSetOption(IntPtr.Zero, InternetOptionActions.INTERNET_OPTION_REFRESH, IntPtr.Zero, 0);
return true;
}
else
{
return false;
}
}
finally
{
if (optionsPtr != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(optionsPtr);
}
for (int i = 1; i < options.Length; i++)
{
if (options[i].Value.szValue != IntPtr.Zero)
{
Marshal.FreeHGlobal(options[i].Value.szValue);
}
}
}
}
public static bool SetProxy(string strProxy)
{
InternetPerConnOptionList request = new InternetPerConnOptionList();
InternetPerConnOption[] options = new InternetPerConnOption[2];
int optionSize = 0;
IntPtr optionsPtr = IntPtr.Zero;
try
{
options[0].dwOption = OptionType.INTERNET_PER_CONN_FLAGS;
options[0].Value.dwValue = (int)ProxyFlags.PROXY_TYPE_PROXY;
options[1].dwOption = OptionType.INTERNET_PER_CONN_PROXY_SERVER;
options[1].Value.szValue = String.IsNullOrEmpty(strProxy) ? IntPtr.Zero : Marshal.StringToHGlobalAnsi(strProxy);
optionSize = Marshal.SizeOf(typeof(InternetPerConnOption));
optionsPtr = Marshal.AllocCoTaskMem(optionSize * options.Length);
if (optionsPtr == IntPtr.Zero)
{
return false;
}
for (int i = 0; i < options.Length; ++i)
{
IntPtr optionPtr = new IntPtr(optionsPtr.ToInt32() + (i * optionSize));
Marshal.StructureToPtr(options[i], optionPtr, false);
}
request.pszConnection = IntPtr.Zero;
request.dwSize = Marshal.SizeOf(typeof(InternetPerConnOptionList));
request.dwOptionCount = options.Length;
request.dwOptionError = 0;
request.pOptions = optionsPtr;
int requestLength = request.dwSize;
if (NativeMethods.InternetSetOption(IntPtr.Zero, InternetOptionActions.INTERNET_OPTION_PER_CONNECTION_OPTION, ref request, requestLength))
{
NativeMethods.InternetSetOption(IntPtr.Zero, InternetOptionActions.INTERNET_OPTION_SETTINGS_CHANGED, IntPtr.Zero, 0);
NativeMethods.InternetSetOption(IntPtr.Zero, InternetOptionActions.INTERNET_OPTION_REFRESH, IntPtr.Zero, 0);
return true;
}
else
{
return false;
}
}
finally
{
if (optionsPtr != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(optionsPtr);
}
for (int i = 1; i < options.Length; i++)
{
if (options[i].Value.szValue != IntPtr.Zero)
{
Marshal.FreeHGlobal(options[i].Value.szValue);
}
}
}
}
public static bool SetProxy(string strProxy, string strExceptions)
{
InternetPerConnOptionList request = new InternetPerConnOptionList();
InternetPerConnOption[] options = new InternetPerConnOption[3];
int optionSize = 0;
IntPtr optionsPtr = IntPtr.Zero;
try
{
options[0].dwOption = OptionType.INTERNET_PER_CONN_FLAGS;
options[0].Value.dwValue = (int)ProxyFlags.PROXY_TYPE_PROXY;
options[1].dwOption = OptionType.INTERNET_PER_CONN_PROXY_SERVER;
options[1].Value.szValue = String.IsNullOrEmpty(strProxy) ? IntPtr.Zero : Marshal.StringToHGlobalAnsi(strProxy);
options[2].dwOption = OptionType.INTERNET_PER_CONN_PROXY_BYPASS;
options[2].Value.szValue = String.IsNullOrEmpty(strExceptions) ? IntPtr.Zero : Marshal.StringToHGlobalAnsi(strExceptions);
optionSize = Marshal.SizeOf(typeof(InternetPerConnOption));
optionsPtr = Marshal.AllocCoTaskMem(optionSize * options.Length);
if (optionsPtr == IntPtr.Zero)
{
return false;
}
for (int i = 0; i < options.Length; ++i)
{
IntPtr optionPtr = new IntPtr(optionsPtr.ToInt32() + (i * optionSize));
Marshal.StructureToPtr(options[i], optionPtr, false);
}
request.pszConnection = IntPtr.Zero;
request.dwSize = Marshal.SizeOf(typeof(InternetPerConnOptionList));
request.dwOptionCount = options.Length;
request.dwOptionError = 0;
request.pOptions = optionsPtr;
int requestLength = request.dwSize;
if (NativeMethods.InternetSetOption(IntPtr.Zero, InternetOptionActions.INTERNET_OPTION_PER_CONNECTION_OPTION, ref request, requestLength))
{
NativeMethods.InternetSetOption(IntPtr.Zero, InternetOptionActions.INTERNET_OPTION_SETTINGS_CHANGED, IntPtr.Zero, 0);
NativeMethods.InternetSetOption(IntPtr.Zero, InternetOptionActions.INTERNET_OPTION_REFRESH, IntPtr.Zero, 0);
return true;
}
else
{
return false;
}
}
finally
{
if (optionsPtr != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(optionsPtr);
}
for (int i = 1; i < options.Length; i++)
{
if (options[i].Value.szValue != IntPtr.Zero)
{
Marshal.FreeHGlobal(options[i].Value.szValue);
}
}
}
}
#region WinInet structures
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public struct InternetPerConnOptionList
{
public int dwSize;
public IntPtr pszConnection;
public int dwOptionCount;
public int dwOptionError;
public IntPtr pOptions;
};
[StructLayout(LayoutKind.Explicit, CharSet = CharSet.Auto)]
public struct InternetPerConnOptionData
{
[FieldOffset(0)]
public int dwValue;
[FieldOffset(0)]
public IntPtr szValue;
[FieldOffset(0)]
public System.Runtime.InteropServices.ComTypes.FILETIME ftValue;
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public struct InternetPerConnOption
{
public OptionType dwOption;
public InternetPerConnOptionData Value;
}
#endregion
#region WinInet enums
//
// options manifests for Internet{Query|Set}Option
//
public enum InternetOptionActions : uint
{
INTERNET_OPTION_REFRESH = 37,
INTERNET_OPTION_SETTINGS_CHANGED = 39,
INTERNET_OPTION_PER_CONNECTION_OPTION = 75
}
//
// Options used in INTERNET_PER_CONN_OPTON struct
//
public enum OptionType
{
INTERNET_PER_CONN_FLAGS = 1,
INTERNET_PER_CONN_PROXY_SERVER = 2,
INTERNET_PER_CONN_PROXY_BYPASS = 3,
INTERNET_PER_CONN_AUTOCONFIG_URL = 4,
INTERNET_PER_CONN_AUTODISCOVERY_FLAGS = 5,
INTERNET_PER_CONN_AUTOCONFIG_SECONDARY_URL = 6,
INTERNET_PER_CONN_AUTOCONFIG_RELOAD_DELAY_MINS = 7,
INTERNET_PER_CONN_AUTOCONFIG_LAST_DETECT_TIME = 8,
INTERNET_PER_CONN_AUTOCONFIG_LAST_DETECT_URL = 9
}
//
// PER_CONN_FLAGS
//
[Flags]
public enum ProxyFlags
{
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)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool InternetSetOption(IntPtr hInternet, int dwOption, IntPtr lpBuffer, int lpdwBufferLength);
[DllImport("wininet.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool InternetQueryOption(IntPtr hInternet, InternetOptionActions dwOption, ref InternetPerConnOptionList lpOptionList, ref int lpdwBufferLength);
[DllImport("wininet.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool InternetSetOption(IntPtr hInternet, InternetOptionActions dwOption, ref InternetPerConnOptionList lpOptionList, int lpdwBufferLength);
[DllImport("wininet.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool InternetSetOption(IntPtr hInternet, InternetOptionActions dwOption, IntPtr lpbuf, int lpdwBufferLength);
}
}
这样使用：
InternetSettings.SetProxy("192.168.0.2", "(local);myexception.com");
和
InternetSettings.UnsetProxy();
我不能添加注释，所以我只添加它作为答案。您可以使用I/Invoke从c使用WinINet API调用（特别是InternetSetOption）来完成这项工作（我同意不直接更改注册表）。
以下是相关的StackOverflow答案：
如何使用InternetSetOption？
这有示例代码和用法。
在vc++中，您可以使用以下代码。。
/// <summary>
/// Checks or unchecks the IE Options Connection setting of "Automatically detect Proxy"
/// </summary>
/// <param name="set">Provide 'true' if you want to check the 'Automatically detect Proxy' check box. To uncheck, pass 'false'</param>
public void IEAutoDetectProxy(bool set)
{
// Setting Proxy information for IE Settings.
RegistryKey RegKey = Registry.CurrentUser.OpenSubKey(@"Software''Microsoft''Windows''CurrentVersion''Internet Settings''Connections", true);
byte[] defConnection = (byte[])RegKey.GetValue("DefaultConnectionSettings");
byte[] savedLegacySetting = (byte[])RegKey.GetValue("SavedLegacySettings");
if (set)
{
defConnection[8] = Convert.ToByte(9);
savedLegacySetting[8] = Convert.ToByte(9);
}
else
{
defConnection[8] = Convert.ToByte(1);
savedLegacySetting[8] = Convert.ToByte(1);
}
RegKey.SetValue("DefaultConnectionSettings", defConnection);
RegKey.SetValue("SavedLegacySettings", savedLegacySetting);
}
或者您可以简单地更改下面给出的注册表设置
禁用代理：
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER'Software'Microsoft'Windows'CurrentVersion'Internet Settings]
"ProxyEnable"=dword:00000000
启用代理：
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER'Software'Microsoft'Windows'CurrentVersion'Internet Settings]
"ProxyEnable"=dword:00000001
更改代理：
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER'Software'Microsoft'Windows'CurrentVersion'Internet Settings]
"MigrateProxy"=dword:00000001
"ProxyEnable"=dword:00000001
"ProxyHttp1.1"=dword:00000000
"ProxyServer"="http://ProxyServername:80"
"ProxyOverride"="<local>"