BDB 4.6 D Dbt::get_dlen Method Question/Problem

Question

I'm using a cursor to iterate through a BDB 4.6 file using:
System::Data::DataTable^ dt;
mydbfile.cursor(NULL, &cursorp, 0);          
while ( cursorp->get(&key, &data, DB_NEXT) == 0 )
u_int32_t key_len = key.get_dllen(); // always get 0
u_int32_t data_len = data.get_dlen(); // always get 0 even though (char*)data.get_data() returns valid ptr to char string
String^ key_str = gcnew String((char*)key.get_data());
String^ data_str = gcnew String((char*)data.get_data());
dt->Rows->Add(key_str,data_str);
As the code comments show above, the get_dllen() method always returns zero
even though a valid ptr is returned to null terminated key and data strings.
Thus I'm not sure that I'm reading all the data that is present.
What am I doing wrong?
Thanks,
Tom Fisher

Answer 1

Hello,
Is the get_size() method what you want to use to return the data array size? get_dlen() returns the length of the partial record read or written by the application and may not be what you want. The documentation on the Dbt handle is at:
http://www.oracle.com/technology/documentation/berkeley-db/db/api_reference/CXX/dbt.html
Thanks,
Sandra