判断系统是否是64位的方法有很多。
对于C#来说,调用WMI是一种简单易行的方式。我们可以用Win32_Processor类里面的AddressWidth属性来表示系统的位宽。AddressWidth的值受CPU和操作系统的双重影响。
具体的值如下面的表格所示:
32bit OS | 64bit OS | |
32bit CPU | AddressWidth = 32 | N/A |
64bit CPU | AddressWidth = 32 | AddressWidth = 64 |
可以用下面的C#代码得到AddressWidth的值
(注意需添加引用System.Management)
public static string Distinguish64or32System()
{
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 addressWidth;
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
return String.Empty;
}
}
IntPtr.Size, Marshal.SizeOf(typeof(int)) 這兩種方法經測試是錯誤的,運行的時候如果以32位程序去執行就會得到32位結果。
CPU32位及操作系統64位暫未測試