I'm currently working with a struct which is written into a buffer. When reading the struct back into my Application i get the following exception:
Unable to cast object of type 'System.Windows.Documents.TextStore' to type 'System.Version'.
Code
The exception is thrown when casting the result back ( (T)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(T)); ).
protected static T ReadStruct<T>(Stream input)
where T : struct
{
Byte[] buffer = new Byte[Marshal.SizeOf(typeof(T))];
input.Read(buffer, 0, buffer.Length);
GCHandle handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
T result = (T)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(T));
handle.Free();
return result;
}
Used data-structure
/// <summary>
/// The header for all binary files
/// </summary>
[StructLayout(LayoutKind.Sequential, Pack = 1, CharSet=CharSet.Ansi)]
public unsafe struct BinaryHeader
{
public const String MAGIC_KEY = "TABF";
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 5)]
String _Magic;
Version _Version;
DateTime _Timestamp;
Guid _Format;
Int64 _Reserved0;
Int64 _Reserved1;
/// <summary>
/// The magic value for the test automation binary
/// </summary>
public String Magic
{
get
{
return _Magic;
}
}
/// <summary>
/// The version of the assembly ( used for debugging )
/// </summary>
public Version AssemblyVersion { get { return _Version; } }
/// <summary>
/// The formatGuid of the current binary
/// </summary>
public Guid FormatGuid { get { return _Format; } }
/// <summary>
/// The timestamp of the file
/// </summary>
public DateTime Timestamp { get { return _Timestamp; } }
public BinaryHeader(Guid formatGuid)
{
_Reserved0 = 0;
_Reserved1 = 0;
_Version = BinaryBase.AssemblyVersion;
_Format = formatGuid;
_Timestamp = DateTime.Now;
_Magic = MAGIC_KEY;
}
}
