I'm working on a C# compact application with win CE platform and I am using this code .....
var assembly = Assembly.LoadFrom(assemblyFile);
Version ver = assembly.GetName().Version;
theVsertion = ver.ToString();
to get the file version but in another method, I must delete the old file, and when I try to use this code.
if (File.Exists(assemblyFile))
{
File.Delete(assemblyFile);
}
if found this error
" process cannot access the file ### because it is being used by another process."
please, anyone can help me with this issue.
Just for the record: this is the solution to the problem. just replace the Assembly class with this code.
public static Version GetFileVersionCe(string fileName)
{
int handle = 0;
int length = GetFileVersionInfoSize(fileName, ref handle);
Version v = null;
if (length > 0)
{
IntPtr buffer = System.Runtime.InteropServices.Marshal.AllocHGlobal(length);
if (GetFileVersionInfo(fileName, handle, length, buffer))
{
IntPtr fixedbuffer = IntPtr.Zero;
int fixedlen = 0;
if (VerQueryValue(buffer, "\\", ref fixedbuffer, ref fixedlen))
{
byte[] fixedversioninfo = new byte[fixedlen];
System.Runtime.InteropServices.Marshal.Copy(fixedbuffer, fixedversioninfo, 0, fixedlen);
v = new Version(
BitConverter.ToInt16(fixedversioninfo, 10),
BitConverter.ToInt16(fixedversioninfo, 8),
BitConverter.ToInt16(fixedversioninfo, 14),
BitConverter.ToInt16(fixedversioninfo, 12));
}
}
Marshal.FreeHGlobal(buffer);
}
return v;
}
[DllImport("coredll", EntryPoint = "GetFileVersionInfo", SetLastError = true)]
private static extern bool GetFileVersionInfo(string filename, int handle, int len, IntPtr buffer);
[DllImport("coredll", EntryPoint = "GetFileVersionInfoSize", SetLastError = true)]
private static extern int GetFileVersionInfoSize(string filename, ref int handle);
[DllImport("coredll", EntryPoint = "VerQueryValue", SetLastError = true)]
private static extern bool VerQueryValue(IntPtr buffer, string subblock, ref IntPtr blockbuffer, ref int len);
The only way to unload an assembly is to unload the AppDomain. An alternative would be to read the file into a byte[] and load this byte[] as assembly.
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