Download e-book for kindle: Developing. NET Custom Controls & Designers using C by James Henry

By James Henry

ISBN-10: 0972317902

ISBN-13: 9780972317900

Bankruptcy 1 brought the reader to the publication through describing what the booklet will hide, choosing the viewers and what the reader may still already recognize, and the recapping the heritage of keep watch over reusability. bankruptcy 2 introduces the reader to occasions and occasion handlers. It additionally discusses delegates and their comparability to operate tips. bankruptcy three talks approximately style conversion concepts. It starts off with an advent to the TypeConverterAttribute after which is going right into a targeted cause of imposing a customized TypeConverter derived category. bankruptcy four explains the position and utilization of UITypeEditors. It additionally offers targeted factors for enforcing customized editors. Chapters five, 6, and seven dig into home windows varieties keep an eye on improvement via describing keep an eye on structure, information binding, and GDI+. Chapters eight, nine, 10, and eleven speak about net varieties keep watch over improvement, with subject matters corresponding to rendering and nation administration. Chapters 12 and thirteen give you the beneficial details to enforce customized designers. the full dressmaker structure is mentioned. bankruptcy 14 discusses regulate licensing and offers examples of imposing new licensing schemes. Chapters 15 and sixteen factor a recap of the total booklet through strolling during the implementation of a Wizard and Tab keep watch over. All points of regulate improvement, together with clothier aid, are mentioned.

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Multi-cast delegates can wrap more than one method. Invoking these delegates result in all encapsulated methods being invoked. For this reason, the return type should be void. Otherwise, only the return value of the last method will be used. The internal implementation uses an ordered list to store references to all methods attached to the delegate. Delegates can be multi-cast by simply using the overloaded + and += operators. MySubstractionHandler); Calculate calculateHandler = additionHandler + substractionHandler; // NOT GOOD int result = calculateHandler(10, 5); private int MyAdditionHandler(int x, int y) { return x + y; } private int MySubstractionHandler(int x, int y) { return x – y; } The code above is still not good code.

The properties of this interface are described next: Container: When associated with type converters, this property typically returns the container used to display or edit the value that is being converted. It basically gets the container that represents the TypeDescriptor request. Instance: Returns an instance of the object that is connected to the TypeDescriptor request. During type conversions, this may be an instance of the object that is being converted. It also may represent an instance of a control used to host the object.

If the delegate is single-cast, the array will only have one element. Each delegate in the array is a non-combinable delegate. Therefore, the invocation list of each delegate in the array will reference a single method. Otherwise, each delegate in the array would contain the same invocation list. DynamicInvoke: Dynamically invokes the method associated with the current delegate. This is referred to as late-bound invocation. This method takes a single parameter, which is an array of object instances representing the method’s parameter list.

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Developing. NET Custom Controls & Designers using C by James Henry

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