How to detect Windows 64 bit platform with .net?

最新推荐文章于 2021-05-27 21:11:14 发布

最新推荐文章于 2021-05-27 21:11:14 发布 · 109 阅读

本文介绍如何在.NET环境下检测当前运行的Windows平台是否为64位，包括在32位.NET Framework上运行时的情况。通过检查IntPtr.Size和调用WinAPI函数IsWow64Process来实现这一目标。

http://stackoverflow.com/questions/336633/how-to-detect-windows-64-bit-platform-with-net

IntPtr.Size won't return the correct value if running in 32-bit .NET Framework 2.0 on 64-bit Windows (it would return 32-bit).

As Microsoft's Raymond Chen describes, you have to first check if running in a 64-bit process (I think in .NET you can do so by checking IntPtr.Size), and if you are running in a 32-bit process, you still have to call the Win API function IsWow64Process. If this returns true, you are running in a 32-bit process on 64-bit Windows.

Microsoft's Raymond Chen:How to detect programmatically whether you are running on 64-bit Windows

My solution:

bool is64BitProcess = (IntPtr.Size == 8);
bool is64BitOperatingSystem = is64BitProcess || InternalCheckIsWow64();

[DllImport("kernel32.dll", SetLastError = true, CallingConvention = CallingConvention.Winapi)]
[return: MarshalAs(UnmanagedType.Bool)]
private static extern bool IsWow64Process(
    [In] IntPtr hProcess,
    [Out] out bool wow64Process
);

public static bool InternalCheckIsWow64()
{
    if ((Environment.OSVersion.Version.Major == 5 && Environment.OSVersion.Version.Minor >= 1) ||
        Environment.OSVersion.Version.Major >= 6)
    {
        using (Process p = Process.GetCurrentProcess())
        {
            bool retVal;
            if (!IsWow64Process(p.Handle, out retVal))
            {
                return false;
            }
            return retVal;
        }
    }
    else
    {
        return false;
    }
}