.net/C# 获取 当前操作系统是32位还是64位-总结

 .net/C#  当前操作系统是32位还是64位-总结

判断整型的长度的方式，只有在AnyCPU编译模式下才有用。因此更好的办法是获取真的地址总线位宽

 

// 判断操作系统是32位还是64位

virtual public int PlateFormRunMode
{
get
{
if (IntPtr.Size == 8)
{
return 64;
}
return 32;

}
}

//这里需要引用System.Management，该方法在以Guest用户登录的情况下抛出异常：
public static int GetOSBit()
{
try
{
string addressWidth = String.Empty;
ConnectionOptions mConnOption = new ConnectionOptions();
ManagementScope mMs = new ManagementScope(@"\\localhost", mConnOption);
ObjectQuery mQuery = new ObjectQuery("select AddressWidth from Win32_Processor");
ManagementObjectSearcher mSearcher = new ManagementObjectSearcher(mMs, mQuery);
ManagementObjectCollection mObjectCollection = mSearcher.Get();
foreach (ManagementObject mObject in mObjectCollection)
{
addressWidth = mObject["AddressWidth"].ToString();
}
return Int32.Parse(addressWidth);
}
catch (Exception ex)
{
return 32;
}
}

 

//这里需要引用System.Diagnostics

[DllImport("kernel32.dll", SetLastError = true, CallingConvention = CallingConvention.Winapi)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool IsWow64Process([In] IntPtr hProcess, [Out] out bool lpSystemInfo);
private static bool Is64Bit()
{
bool retVal;
IsWow64Process( Process.GetCurrentProcess().Handle, out retVal);
return retVal;
}

//.net 4.0(3.5)以上的
bool is64Bit;
is64Bit= Environment.Is64BitOperatingSystem;
Console.WriteLine(is64Bit); //true为64位； false为32位