c# async tutorial

public override string name {get {return Name } set {name = value; }}//declares an age property of type int public override int Age {get {return age; } set {age = value; }} public override string ToString () {return "code =" + code + ", name =" + name +", age =" + age; }} class Exampledemo {public static void Main () {//Create a new Student object Student s = new S Tudent (); Set the code, name, and age S.code = "001" for student;

- (void//必须实现@optional- (void)slideHome;- (void)catchBall;- (void)throwBall;@required- (void//必须实现@end // BaseballPlayerNote :The informal agreement in cocoa was gradually replaced by a formal agreement with the @optional approach.13.4 Delegate MethodsDelegate: An object specifies the design pattern for another object to handle certain tasks, and the delegate adheres to the ProtocolThe delegate method for the Nsnetservicebrowser class:-(iddelegate;//返回当前的委托对象-(void)setDelegate:(iddelegate;//设置委

// -- C ++ shortcut tutorial -- Chapter 18--c ++ I/O system// -- Chapter 18--c ++ I/O system// -- 10/16/2006 mon.// -- Chang'an university dormitory // -- Xwlee // Read () and write () -- 16# Include # Include Using namespace STD; Int main (INT argc, char * argv []){Int N [5] = {1, 2, 3, 4, 5 };Register int I; Of

operation can continue to perform other tasks. When the operation is complete, his callback function is notified so that the program knows that the operation has ended NET4.5 already supports async and await, making async as easy as synchronizing programming. The purpose of the await keyword is to start a task that will be executed (the task will be executed in the new thread) and return immediately so tha

as identifiers, but if you want to use these keywords as identifiers, you can prefix them with the @ character before the keyword. In C #, some identifiers have special meanings in the context of the code, such as Get and set, which are called contextual keywords (contextual keywords). The following table lists the reserved keywords (Reserved Keywords) and the contextual keywords (contextual Keywords) in C

the letter A in the image), can also be used as face recognition (when the match rate is less than the same person, or match a face to remove the image of this face, Discover the possible twins or something). can also be used as a flaw detection (you pick a normal product sample picture, and then take this sample than the wrong thing, if found that the error exceeds a certain value of the product is considered a problem, otherwise qualified) readers need to master:1 General Vision System operat

be a name, while the exposed property is another name.@property(copy)NSString *name;@synthesize name = appellation;// 编译器将创建-setName:和-name方法，但在实现代码中用的是appellation实例变量。Note :Direct access to instance variables: self.nameTo assign a value using an access method:[self setName:@"Car"];11.22 Read-only propertiesFor values that can only be read, cannot be changed:@property(readonly)float shoeSize;Note : Only one getter method is generated and no setter method is generated11.23 Hands on your own@dyna

delegate object @interface nsobject ( Span class= "hljs-variable" >nsnetservicebrowserdelegatemethods ) - (void) Netservicebrowserwillsearch: (nsnetservicebrowser *) browser;- Netservicebrowserdidstopsearch: (NSNetServiceBrowser *) browser;- (void) Netservicebrowser: ( Span class= "hljs-variable" >nsnetservicebrowser *) browser Didremoveservice: (nsnetservice *) service morecoming: (bool ) morecoming; @end By declaring the category as NSObject, Nsnetservicebrowser can send o

This tutorial will explain how to call C + + functions in Lua. In Lua, it is simpler to call C + + functions, and this article will demonstrate a concrete approach with two examples: one for averages and the other for printing parameter information for LUA functions. Finally, this article describes how to define these two functions as a module so that the globa

system.text.regularexpressions;namespace regexapplication{ class program { static void Main (string[] args) { string input = "Hello world "; String pattern = "\\s+"; String replacement = ""; Regex rgx = new regex (pattern); string result = Rgx. Replace (input, replacement); Console.WriteLine ("Original String: {0}", input); Console.WriteLine ("Replacement String: {0}", result); Console.readkey ();}}} When t

In this paper, the method of asynchronous invocation in C # is presented, and the principle of it is analyzed in depth, which is now shared by the tutorial for everyone's reference. Specific as follows:First, let's look at a simple example:Xiao Ming in boiling water, and so on after the boil, will pour water into the thermos, and then began to tidy up the houseworkXiaowen in the process of boiling water, cl

Previous ArticleArticleRecords the knowledge of flow control statements in C #. This section describes the pre-processor commands in C, C # Preprocessor commands allow the compiler to do a lot of things that the C # basic syntax cannot do. I have only read this before and have never actually used it. This is just the c

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}", num1, num2, num3, num4); Console.WriteLine ("A nullable Boolean value: {0}", boolval); Console.ReadLine ();}}} When the above code is compiled and executed, it produces the following results: Displays the value of a nullable type:, 3.14157, a nullable Boolean value: The Null merge operator (?? ） The null merge operator is used to define the default values for nullable types and reference types. The null merge operator defines a preset value for

implementation of the above interface: Using system.collections.generic;using system.linq;using system.text;namespace interfaceapplication{Public Interface Itransactions {//interface member void Showtransaction (); Double Getamount (); } public class Transaction:itransactions {private string tcode; private string date; private double amount; Public Transaction () {tcode = ""; Date = ""; Amount = 0.0; } public Transaction (string

7. The third C programFirst, take a look at the following small program and try to compile and run it by yourself. If you do not know how to compile, click the following hyperlink:Compiler usageCompiler Dev-C ++ download tutorial /* Circle. c -- calculate the area of the circle */ # IncludeStdio. h> Int main (void){Fl

C # enumeration (enum) An enumeration is a set of named integer constants. Enumeration types are declared using the enum keyword. C # Enumerations are value data types. In other words, the enumeration contains its own values and cannot inherit or pass inheritance. Declaring an enum variable General syntax for declaring enumerations: Enum which ENUM_NAME Specifies the type name of the enumeration. The enume

explained the conditional operators in the previous chapters. : Can be used instead of if...else statements. Its general form is as follows: Exp1? EXP2:EXP3; Among them, EXP1, EXP2, and Exp3 are expressions. Notice the use and position of the colon. ? The value of an expression is determined by EXP1. If EXP1 is true, the value of EXP2 is computed and the result is the whole? The value of an expression. If EXP1 is false, the value of EXP3 is computed and the result is the whole? The value of

Public classMrzhang {//In fact, the sad figure of buying a ticket is Xiao Zhang Public Static voidBuyticket () {Console.WriteLine ("NND, let me go to buy tickets every time, chicken man! "); } Public Static voidBuymovieticket () {Console.WriteLine ("I'll go, pick up the girls, and let me bring the movie tickets! "); } } //Xiao Ming class classmrming {//declaring a delegate is, in fact, a "command." Public Delegate voidBugticketeventhandler (); Public Static

range of Int. Then, for the second printf, regardless of whether we use%HD or%d, the output results are the same. This is because the c language standard stipulates that when the short type value is passed to the function, it is automatically converted to the int type value. It is converted to int because int is designed to be the most efficient integer type of computer processing. So, for computers with a short and int size, converting the variabl