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Get Language Id for File (Part 1)
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Permissions;
using System.Text;
using System.Threading.Tasks;
using System.Runtime.InteropServices;
namespace VersionInfo
{
public class RealVersionInfo
{
public string FileName { get; set; }
public int LanguageId { get; set; }
private RealVersionInfo(string filename)
{
FileName = filename;
}
public unsafe static RealVersionInfo GetVersionInformation(string filename)
{
if(!File.Exists(filename))
{
// Check for read access - exists errors if can't be read, but below will only throw an error when access fails, but file exists
new FileIOPermission(FileIOPermissionAccess.Read, Path.GetFullPath(filename)).Demand();
throw new FileNotFoundException(filename);
}
int handle;
int infoSize = NativeMethods.GetFileVersionInfoSize(filename, out handle);
RealVersionInfo rvi = new RealVersionInfo(filename);
if(infoSize != 0)
{
byte[] mem = new byte[infoSize];
fixed(byte* memPtr = mem)
{
IntPtr memIntPtr = new IntPtr((void*)memPtr);
bool success = NativeMethods.GetFileVersionInfo(filename, 0, infoSize, new HandleRef(null, memIntPtr));
if (success)
{
rvi.LanguageId = GetVarEntry(memIntPtr);
}
}
}
return rvi;
}
private static int GetVarEntry(IntPtr memPtr)
{
IntPtr memRef = IntPtr.Zero;
int memLen;
if (NativeMethods.VerQueryValue(new HandleRef(null, memPtr), "\\VarFileInfo\\Translation", ref memRef, out memLen))
{
return (Marshal.ReadInt16(memRef) << 16) + Marshal.ReadInt16((IntPtr)((long)memRef + 2));
}
return 0x040904E4;
}
}
}
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