No Default Value during insertion

Because the code generator is used, @… will appear when null parameters are passed during insertion @... No default value exception.

Find the Private Static void preparecommand (oledbcommand cmd, oledbconnection Conn, oledbtransaction trans, string plain text, oledbparameter [] partial parms) Method

Add the following code in the foreach loop:

// If the passed parameter does not have a corresponding value, it is set to null.
If (parm. Direction = parameterdirection. InputOutput | parm. Direction = parameterdirection. Input & parm. value = NULL)
{
Parm. value = dbnull. value;
}