c# delegate example

PrefaceI used to read this book in Code Complete 2nd (Code Daquan 2 ). In a language such as C #, do not use delegate instead of interface instead to avoid performance impact. Practice the truth, so I wrote a small example to test My hardware is 2.66 GB, 4 Core CPU, 4 GB memory I don't know if the computer is faster or if the function I wrote is too small.The nu

= Delegate (string name)//{ //Console.WriteLine ("Anonymous" + name); //}; //dele ("Meow"); //2. Delegate as a parameter to another method//Test ("Cat", Sayhichinese); //3. Initializing delegates with anonymous functions//you can avoid declaring multiple functions for when a function is used only once//Test ("Dog", delegate (string name)//{

participates in the Operation - /// data that participates in the Operation the /// returns the result of the operation of the delegate function * Static DoubleDocal (Calculate Cal,DoubleXDoubley) $ {Panax Notoginseng returncal (x, y); - } the //addition + Static DoubleADD (DoubleXDoubley) A { the returnX +y; + } - //Subtraction $ Static Do

Principle: Similar to function pointers in C and C + +. Statement: Using the delegate keyword public delegate void Del (String message); Construct: Provide the name of the method you want to wrap or use the anonymous method Method 1: Provide the method name 1, first define a method to be packaged: Create a function fo

There are one hours to go home for the New year, I wish you good luck in 2018, Big fortune.C # Delegates look like the OC agent and Java interface, but it is very different, so-called Proxy and interface is independent of some of the method declaration (not implemented), as long as a class A inherit the proxy, you can implement them, then other classes can let a as their properties, Let a instead of these classes to do things, just call the time and timing by these classes to do, really to achie

In fact, the delegate in C # is equivalent to the method type in Delphi. It is the basis for event processing in C #, as shown in the following example:Using system;// Declare delegate -- defines required signature:Delegate void sampledelegate (string message ); Class mainclass{// Regular method that matches signature:

This blog will share with you the delegates in C #.What is a delegate?Let's start by thinking about the question, if I want to write a person class now, it's defined as follows:public Class person{public string Name {get ; set ; } public int Age { Get ; set ; } public void Zhuangbi () {//the first step, find the topic //step two, find a way to talk Man of the Day Console.WriteLine ( "I am ne

C # system delegate Action And Func, Action: encapsulate a method that does not have parameters and does not return values. public delegate void Action() Action public delegate void Action It can be seen that the definition of Action is very simple, but such a delegate is

A generic delegate is actually a predefined delegate of the. NET framework that basically covers all the commonly used delegates, so it is generally not necessary for users to declare them again. simple and convenient . ' 1 generic delegate with no return value The Action series generic delegate is a

parameters, one is object and the other is the EventArgs type (or inherited from EventArgs).(3) The name of the event is the remainder of the EventHandler after the delegate is removed.(4) Types that inherit from EventArgs should end with EventArgs.3, simple to "heating water heater, the water temperature is greater than 95 degrees when the alarm sounded, display display water temperature" as an example.Code:1 usingSystem;2 usingSystem.Collections.Ge

Call MinGW's so file using C #, display the video data back to the WPF interface, and register the callback function. C + + encountered a problem with the delegate being reclaimed when invoking the callback function, prompting: "The garbage collection delegate of type has made a callback." This can cause application cr

In C # There is a way to implement a cross-form call control without the need for a custom message, and C # has a better way to delegate.Effect Description: There are two forms, FORM1 (a button control called "Open Form2") and FORM2 (a button control called "Change Form1 Color"). On startup, click the Button control "open Form2" in FORM1 to display the FORM2. When you click "Change Form1 Color" in FORM2, th

The example in this article describes how C # uses anonymous methods to define the implementation of a delegate. Share to everyone for your reference. The implementation methods are as follows: ? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Define delegate class program with anonymous method {

1.Thread "Threads"Constant creation of Thread consumes large cups resulting in slower asynchronous efficiency2.delegate "Delegate Async"Because of the need to instantiate the delegate class continuously, it consumes CPU and memory3.Task "Combined with async"This is the lower Cup and memory loss in three of the best performanceHere is an

C # differences between delegate and event, The following describes the events. 1. Define event and event compilation principles First, define the delegate corresponding to the event: 1 public delegate void ThreeClickEventDel(); Then it corresponds to the event variable: (in fact, an event is added before the

A good memory is better than a bad pen, write to the impression of a deeper.Commissioned A custom data structure that uses the keyword delegate definition, in the form of a delegate return type delegate name (parameter list), whose return type and argument list need to be consistent with the delegate method, usin

You can only trust this thing. If you cannot understand it, you may feel uncomfortable. However, I believe that one day you will suddenly realize it. I suddenly realized it, so I will talk about it. In fact, the purpose of delegation is to adapt to unpredictable things. Just like you put a button on the form, God knows what you want to do? But God knows what you want to do! Now that you know what you want to do, what you want to do must be related to this button. At this time, the

, ExceptionUsing try or throw throws exception catch handling exceptions, some exceptions can do nothing, like endofstreamexception. Exceptions are not vulnerabilities or errors, and handling of exceptions is important, and exceptions affect the performance of the program.try {Double A = 5; Double b = 0; Dodivide (A, b);}catch (System.DivideByZeroException){...}catch (System.ArithmeticException){...}catch (Exception e){...}Public double dodivide (double A, double b){if (b = = 0) {throw new Syste

version, as shown in figure# Define delegate_template Template# Define delegate_template_params # Define delegate_template_args TP1 P1, TP2# Define mygui_ I _delegate idelegate2 The compiled version is the version of the double parameter! By using this method, you can implement other versions such as cstaticdelegate, cmethoddelegate, and cmultidelegate. All you need to do is to re-define those macros, it's convenient. The next article will introduce some helper classes implemented by mygui, suc