C#判斷作業系統是32位還是64位

標籤：style   os   io   for   cti   代碼   div   ar   

1 根據控制代碼長度判斷作業系統是否為64位作業系統public static bool IsRunningOn64Bit { get { return IntPtr.Size == 8; } }2 根據控制代碼長度判斷作業系統是否為64位作業系統（不安全的程式碼）public static unsafe bool IsRunningOn64Bit { get { return (sizeof(IntPtr) == sizeof(long)); } }

將項目做如下設定：項目屬性對話方塊->配置屬性->產生->允許不安全的程式碼塊 設為"true"

3 根據AddressWidth屬性判斷

AddressWidth的值受CPU和作業系統的雙重影響。如下：

	32bit OS	64bit OS
32bit CPU	AddressWidth = 32	N/A
64bit CPU	AddressWidth = 32	AddressWidth = 64

以下程式段讀取AddressWidth的值

public static string GetAddressWidth() {     ConnectionOptions oConn = new ConnectionOptions();     System.Management.ManagementScope oMs = new System.Management.ManagementScope("\\\\localhost", oConn);     System.Management.ObjectQuery oQuery = new System.Management.ObjectQuery("select AddressWidth from Win32_Processor");     ManagementObjectSearcher oSearcher = new ManagementObjectSearcher(oMs, oQuery);     ManagementObjectCollection oReturnCollection = oSearcher.Get();     string addressWidth = null;    foreach (ManagementObject oReturn in oReturnCollection)     {         addressWidth = oReturn["AddressWidth"].ToString();     }    return addressWidth; }4 判斷作業系統是否為64位作業系統bool IsRunningOn64Bit() { #if defined(_WIN64)  return true; // 64-bit programs run only on Win64 #elif defined(_WIN32)  // 32-bit programs run on both 32-bit and 64-bit Windows  // so must sniff  bool f64 = false;  return IsWow64Process(GetCurrentProcess(), &f64) && f64; #else  return false; // Win64 does not support Win16 #endif }

網友評論：不要用IsWow64Process()，Wow64特指Windows32 On Win64。