beginning visual c 2010 wrox programmer to programmer free download

... the class It is executed when an instance of the class is created and can contain code to initialize the instance You will learn about constructors in Chapter 7 ) In fact, the application contains ... project Click OK Create a new console application using Visual C# 2010 Express On the File menu, click New Project to open the New Project dialog box For the template, select Console Application ... Application Choose a name for the project Click OK Create a new graphical application using Visual Studio 2010 Standard Create a new graphical application using Visual C# 2010 Express

Ngày tải lên: 05/07/2014, 16:20

... and second are set to the current date In fact, only the less than operator and the greater than or equal to operator seem to be working correctly 5 Click Quit to return to the Visual ... them calcula-one piece at a time You also need to be able to write methods that selectively perform different actions depending on the circumstances In this chapter, you’ll see how to accomplish ... first > second : False first >= second : True These are the correct results for identical dates 15 Click the icon for the second DateTimePicker control, and then click tomorrow’s date

Ngày tải lên: 05/07/2014, 16:20

... reference type variable Simply make the copy Because the variable is a reference type, you will have two references to the same object For example: Circle c = new Circle(42); Circle refc = c; ... differences: n You can’t declare a default constructor (a constructor with no parameters) for a struc-ture The following example would compile if Time were a class, but because Time is a structure, ... instances live on the stack or the heap? Structure instances are called values and live on the stack Class instances are called objects and live on the heap Can you declare a default constructor?

Ngày tải lên: 05/07/2014, 16:20

... a derived class to call the constructor for its base class as part of the initialization You can specify the base keyword to call a base class constructor when you define a constructor for an ... you don’t write any nondefault constructors), in which case forgetting to call the correct base class constructor results in a compile-time error con-Assigning Classes In previous examples in ... constructor Remember that all classes have at least one constructor (If you don’t provide one, the compiler generates a default constructor for you ) It is good practice for a constructor in

Ngày tải lên: 05/07/2014, 16:20

... of duplicate code. It makes sense to factor this code out into an abstract class called DrawingShape because this will ease maintenance of the Square and Circle classes in the future. Create ... class, remove the definitions of the sideLength, rect, locX, and locY fields. 3. Replace the existing constructor with the following code, which calls the constructor in the base class. Notice ... own code to instantiate the shape object. (Remember that the Square class creates a Rectangle object and the Circle class creates an Ellipse object.) abstract class DrawingShape { public

Ngày tải lên: 05/07/2014, 16:20

... The project contains a number of files, including AmericanClock cs, EuropeanClock cs, JapaneseClock cs, and LocalClock cs These files contain the classes that implement the different clocks You ... public partial class ClockWindow : Window { private LocalClock localClock = null; private EuropeanClock londonClock = null; private AmericanClock newYorkClock = null; private JapaneseClock ... public delegate void StopClocksDelegate(); public StartClocksDelegate StartClocks; public StopClocksDelegate StopClocks; } 11 Add the StartClocksRunning method to the Controller class

Ngày tải lên: 05/07/2014, 16:20

... y.GetHashCode(); You can create an ObjectComparer object and call the Compare method through the IComparer<Object> interface to compare two objects, like this: Object x = ; Object y = ... Object x = ; Object y = ; ObjectComparer comparer = new ObjectComparer(); IComparer<Object> objectComparator = objectComparer; int result = objectComparator(x, y); Trang 9That’s the boring ... Enumerator by Using an Iterator As you can see, the process of making a collection enumerable can become complex and potentially error prone To make life easier, C# includes iterators that can automate

Ngày tải lên: 05/07/2014, 16:20

... operators 1 Return to Visual Studio 2010 and display the Complex cs file in the Code and Text Editor window Add the constructor shown next in bold to the Complex class This constructor ... you use the + operator on two expressions of type Hour, the C# compiler automatically converts your code to a call to your operator+ method The C# compiler converts the code Hour Example(Hour ... instance of the Complex class by using the constructor you created in the previous step Trang 19 3 Add the explicit conversion operator shown next to the Complex class This operator takes a Complex

Ngày tải lên: 05/07/2014, 16:20

... 493and to show you how easy it is to create shortcut menus dynamically, in the following cise you will create the shortcut menu by using code The best place to put this code is in the constructor ... (Collection) A Menu control contains Trang 11a collection of MenuItem elements Currently, the menu has no menu items, so the collection is empty Click the ellipses button (…) adjacent to ... Visual Studio 2010 As a further touch, you can add icons to menu items Many applications, including Visual Studio 2010, make use of icons in menus to provide an additional visual cue 16

Ngày tải lên: 05/07/2014, 16:20

... menu, click All Programs, click Accessories, right-click Command Prompt, and then click Run as administrator If you are logged in using an account that has administrator rights, in the User Account ... Main(string[] args) { SqlConnection dataConnection = new SqlConnection(); } SqlConnection is a subclass of an ADO NET class called Connection It is designed to handle connections to SQL Server databases ... to the code in the try block: This statement uses the connection string specified by the ConnectionString property of the dataConnection object to open a connection to the database If the connection

Ngày tải lên: 05/07/2014, 16:20

... class performs a similar role to a DataContext class in LINQ to SQL, and you can use it to connect to the database The NorthwindEntities class extends the ObjectContext class with logic to connect ... pessimistic concurrency Instead, it provides a middle ground Each item in an EntityObject class has a property called Concurrency Mode By default, the Concurrency Mode is set to None, but you can change ... two users changing the same data is small (hence the term optimistic concurrency ) The opposite of optimistic concurrency is pessimistic concurrency In this scheme, all data is locked in the

Ngày tải lên: 05/07/2014, 16:20

... // Create the cancellation token source and obtain a cancellation token CancellationTokenSource cancellationTokenSource = new CancellationTokenSource(); CancellationToken cancellationToken ... AddToAccumulator); Console.WriteLine("Accumulator is {0}", accumulator); } However, there is no guarantee that the tasks created to run the various invocations of the AddToAccumulator ... is scalable across any number of tasks You can start multiple tasks and pass the same CancellationToken object to each of them If you call Cancel on the CancellationTokenSource object, each

Ngày tải lên: 05/07/2014, 16:20

... To cancel the wait operation, call the Cancel method of the CancellationTokenSource object For example: CancellationTokenSource cancellationTokenSource = new CancellationTokenSource(); CancellationToken ... instantiate a BlockingCollection<T> object without specifying a collec-tion class In this case, the BlockingColleccollec-tion<T> object creates a ConcurrentQueue<T> object internally ... resource readerWriterLock.ExitWriteLock(); }); Cancel a blocking wait operation Create a cancellation token from a CancellationTokenSource object, and specify this token as a parameter to

Ngày tải lên: 05/07/2014, 16:20

... GetCustomerDB to create a CustomerDB object, and then invokes the storeCustomer method to add Fred to the dictionary in the CustomerDB object The code creates another Customer object for a customer ... This class contains a dictionary called customerDatabase The storeCustomer method adds a customer to this dictionary, and the getCustomer method retrieves a customer when given the customer ... refers to an instance of a Python script, which does include these functions The code calls the GetNewCustomer Python function to create a new Customer object with the details for Fred It then calls

Ngày tải lên: 05/07/2014, 16:20

... C++/CLI is predicated on knowledge ofISO/ANSI C++ Thus, you can just read the ISO/ANSI topics in each of Chapters 2 to 20 and ignore theC++/CLI sections that follow You then can to progress to ... 341Placing friend Function Definitions Inside the Class 356 Trang 25Chapter 9: Class Inheritance and Virtual Functions 473Visibility Specifiers for Classes and Interfaces 531Access Specifiers for Class ... devoted toMFC programming than to Windows Forms programming tech-How This Book Is Structured The contents of the book are structured as follows: ❑ Chapter 1 introduces you to the basic concepts

Ngày tải lên: 06/07/2014, 02:20

... extension cppcontainexecutable C++ source code, and the hfiles contain C++ code consisting of definitions that are used by the executable code The icofiles contain icons The files are grouped into the ... you can select Close Solutionfrom the Filemenu Alternatively, you can create a new project and have the current solution closed automatically To create the Windows program select New > Project ... before your code is compiled into object code,and preprocessor directives generally act on your source code in some way before it is compiled Theyall start with the #character I’ll be introducing other

Ngày tải lên: 06/07/2014, 02:20

... that calculates the price of a carpet to demonstrate output in a CLR console program:// Ex2_13.cpp : main project file // Calculating the price of a carpet #include “stdafx.h” using namespace System; ... the corresponding closingbrace after its declaration ❑ A variable may be declared as static, in which case it continues to exist for the life of the gram It can be accessed only within the scope ... enum class to declare enumeration types in C++/CLI ExercisesYou can download the source code for the examples in the book and the solutions to the following exer-cises from http://www.wrox.com

Ngày tải lên: 06/07/2014, 02:20

... thecontents up to the terminating null character The index is specified as dice - 1as the dicevalues arefrom 1to 6, whereas the index values clearly need to be from 0to 5 Indirect Data Access ... differences, too Atracking handle does store an address, and the address it contains is automatically updated by thegarbage collector if the object it references is moved during compaction of ... of contigu-ous bytes to accommodate the variable for which you want to obtain space You don’t have to worry toomuch about this, however With ANSI standard C++, the newoperator will throw an exception

Ngày tải lên: 06/07/2014, 02:20

... new Stringobject on the heap from the indicators array by passing thearray to the Stringclass constructor A class constructor is a function that will create a class object when it is called You’ll ... statement called a function prototype Function Prototypes A prototype of a function provides the basic information that the compiler needs to check that you areusing a function correctly It specifies ... Systemnamespace represents a string in C++/CLI(in fact a string consists of Unicode characters To be more precise it represents a string consisting of a sequence of characters of type System::Char You

Ngày tải lên: 12/08/2014, 10:21

... program into Script Editor, you click the Run button. Clicking that button initiates the following actions: ❑ Analyzes your AppleScript code to make sure it conforms to the rules for writing commands and ... it forces you to correct any errors before you can save your program to a file. Later, if you want to make changes to your program, you can double-click the file name in the Finder to launch Script ... into another format that is more optimal for execution ❑ Indents your AppleScript code according to certain stylistic rules ❑ Changes the color of your words, operators, and expressions according...

Ngày tải lên: 31/05/2014, 23:58