NeoFT/Win32Util/Win32Version.cs

using System;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Diagnostics;

namespace nft.win32util
{
        /// <summary>
        /// ConfigureService ĚTvĚŕžĹˇB
        /// </summary>
        public class Win32Version
        {
                [DllImport("version.dll")]
                static private extern bool GetFileVersionInfo (string sFileName,
                        int handle, int size, byte[] infoBuffer);
                [DllImport("version.dll")]
                static private extern int GetFileVersionInfoSize (string sFileName,
                        out int handle);
                // The third parameter - "out string pValue" - is automatically
                // marshaled from ANSI to Unicode:
                [DllImport("version.dll")]
                unsafe static private extern bool VerQueryValue (byte[] pBlock,
                        string pSubBlock, out string pValue, out uint len);
                // This VerQueryValue overload is marked with 'unsafe' because 
                // it uses a short*:
                [DllImport("version.dll")]
                unsafe static private extern bool VerQueryValue (byte[] pBlock,
                        string pSubBlock, out short *pValue, out uint len);

                private Win32Version()
                {
                }

                unsafe static public string GetAssemblyFileVersion(Assembly target)
                {
                        string fname = (new Uri(target.CodeBase)).LocalPath;
                        int handle = 0;
                        // Figure out how much version info there is:
                        int size =
                                GetFileVersionInfoSize(fname, out handle);
 
                        if (size == 0) return "N/A";
 
                        byte[] buffer = new byte[size];
 
                        if (!GetFileVersionInfo(fname, handle, size, buffer))
                        {
                                Debug.WriteLine("Failed to query file version information.");
                                return "N/A";
                        }
                        short *subBlock = null;
                        uint len = 0;
                        // Get the locale info from the version info:
                        if (!VerQueryValue (buffer, @"\VarFileInfo\Translation", out subBlock, out len))
                        {
                                Debug.WriteLine("Failed to query version information.");
                                return "N/A";
                        }
 
                        string spv = @"\StringFileInfo\" + subBlock[0].ToString("X4") + subBlock[1].ToString("X4") + @"\ProductVersion";
 
                        byte *pVersion = null;
                        // Get the ProductVersion value for this program:
                        string versionInfo;

                        if (!VerQueryValue (buffer, spv, out versionInfo, out len))
                        {
                                Debug.WriteLine("Failed to query version information.");
                                return "N/A";
                        }
                        return versionInfo;
                }
        }
}