The datatype parameter cannot be blank. Unprocessed "system. argumentnullexception" exceptions occur in mscorlib. dll.

Original error code:
Private Static void createprovider ()
{
Objprovider = (dataprovider) dotnetnuke. framework. reflection. createobject ("data", "netcreate. dnn. modules. userregister. data "," netcreate. dnn. modules. userregister "));
}

Error message: the datatype parameter cannot be blank. Unprocessed "system. argumentnullexception" exceptions occur in mscorlib. dll.

Error cause:
The namespace and Assembly name generated by codesmith are inconsistent with the name set in the actual program.
After modification:
Private Static void createprovider ()
{
Objprovider = (dataprovider) dotnetnuke. Framework. reflection. Createobject ("data", "netcreate. modules. userregister. Data", "netcreate. modules. userregister "));
}