} // writeRecord()
// readRecord handles the details of marshaling data
// back from the binary file into a record
private bioStruct readRecord()
{
// Create a new record to hold the data read
bioStruct rec = new bioStruct(1);
byte[] buffer;
// Read the data into the byte buffer buffer
buffer = binfile.read(Marshal.SizeOf(typeof(bioStruct)));
GCHandle handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
// Cast the bytes into the record
rec = (bioStruct)Marshal.PtrToStructure(handle.AddrOfPinnedObject(),
typeof(bioStruct));
return(rec);
} // readRecord()
} // struct bioStruct()
// writeRecord translates from normal data to the
// binary record
public void writeRecord(int i, string s1, string s2,
string lat, string lon, string d, string n, string e)
{
// Create a new record and copy the data in, painfully
bioStruct rec = new bioStruct(1);
rec.id = i;
for (int j = 0; j < s1.Length; j++)
{
rec.commonName[j] = s1[j];
}
for (int j = 0; j < s2.Length; j++)
{
rec.sciName[j] = s2[j];
}
for (int j = 0; j < lat.Length; j++)
{
rec.longitude[j] = lat[j];
}
for (int j = 0; j < lon.Length; j++)
{
rec.latitude[j] = lon[j];
}
for (int j = 0; j < d.Length; j++)
{
rec.date[j] = d[j];
}
for (int j = 0; j < n.Length; j++)
{
rec.name[j] = n[j];
}
for (int j = 0; j < e.Length; j++)
{
rec.age[j] = e[j];
}
// See the reference above for pinning and
// marshaling details
byte[] buffer = new byte[Marshal.SizeOf(typeof(bioStruct))];
GCHandle handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
Marshal.StructureToPtr(rec, handle.AddrOfPinnedObject(), false);
// Actually write the data
binfile.write(buffer, Marshal.SizeOf(typeof(bioStruct)));
handle.Free();
} // writeRecord()
