c# ean 13 check de Complete in Visual C#.NET

Printer GTIN - 13 in Visual C#.NET de Complete

Remove Set()routines for fields that cannot be changed If a field is supposed to be set at object creation time and not changed afterward, initialize that field in the object s constructor rather than providing a misleading Set() routine. Hide routines that are not intended to be used outside the class If the class interface would be more coherent without a routine, hide the routine. Encapsulate unused routines If you find yourself routinely using only a portion of a class s interface, create a new interface to the class that exposes only those necessary routines. Be sure that the new interface provides a coherent abstraction. Collapse a superclass and subclass if their implementations are very similar If the subclass doesn t provide much specialization, combine it into its superclass.

Create a definitive reference source for data you can t control Sometimes you have data maintained by the system that you can t conveniently or consistently access from other objects that need to know about that data. A common example is data maintained in a GUI control. In such a case, you can create a class that mirrors the data in the GUI control, and then have both the GUI control and the other code treat that class as the definitive source of that data. Change unidirectional class association to bidirectional class association If you have two classes that need to use each other s features, but only one class can know about the other class, then change the classes so that they both know about each other. Change bidirectional class association to unidirectional class association If you have two classes that know about each other s features, but only one class that really needs to know about the other, change the classes so that one knows about the other, but not vice versa. Provide a factory method rather than a simple constructor Use a factory method (routine) when you need to create objects based on a type code or when you want to work with reference objects rather than value objects. Replace error codes with exceptions or vice versa Depending on your error-handling strategy, make sure the code is using the standard approach.

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Replace a magic number with a named constant. Rename a variable with a clearer or more informative name. Move an expression inline. Replace an expression with a routine. Introduce an intermediate variable. Convert a multi-use variable to a multiple single-use variables. Use a local variable for local purposes rather than a parameter. Convert a data primitive to a class. Convert a set of type codes to a class. Convert a set of type codes to a class with subclasses. Change an array to an object. Encapsulate a collection. Replace a traditional record with a data class.

Decompose a boolean expression. Move a complex boolean expression into a well-named boolean function. Consolidate fragments that are duplicated within different parts of a conditional. Use break or return instead of a loop control variable. Return as soon as you know the answer instead of assigning a return value within nested if-then-else statements. Replace conditionals with polymorphism (especially repeated case statements). Create and use null objects instead of testing for null values.

Extract a routine. Move a routine s code inline. Convert a long routine to a class. Substitute a simple algorithm for a complex algorithm. Add a parameter. Remove a parameter. Separate query operations from modification operations.

Combine similar routines by parameterizing them. Separate routines whose behavior depends on parameters passed in. Pass a whole object rather than specific fields. Pass specific fields rather than a whole object. Encapsulate downcasting.