A method for judging a null error when inserting a database (technique)

//Public Static Object Todbnull (object value) determines how individual arguments cannot be empty when inserting data//{        //if (value = = null)//    {        //return todbnull.value; //    }        //Else//    {        //return value; //    }        }        Static voidMain (string[] args) {                      //New SqlParameter (@ "BirthDay", Todbnull (BirthDay)), method called by method. Content is just an interception method, not a complete database INSERT statement//Full view of picture information

Add after character type? The delegate allows the data to be empty ==null;

A method for judging a null error when inserting a database (technique)