What is delegate why we use it?

Delegates allow methods to be passed as parameters. Delegates can be used to define callback methods. Delegates can be chained together; for example, multiple methods can be called on a single event. Methods don’t need to match the delegate signature exactly.

What is delegate in C?

A delegate is a type that represents references to methods with a particular parameter list and return type. In other words, a method must have the same return type as the delegate. This ability to refer to a method as a parameter makes delegates ideal for defining callback methods.

What is a delegate method?

A delegate method is a method that the delegate object is expected to implement. Some delegate methods are required, while some are not. In IOS, most delegates are expected to conform to an Objective-C protocol; the protocol declaration will tell you which methods are optional and which are required.

What do you mean by delegates state their use with an example?

A delegate is an object which refers to a method or you can say it is a reference type variable that can hold a reference to the methods. For example, if you click on a Button on a form (Windows Form application), the program would call a specific method.

What is delegate in net?

In the . NET environment, a delegate is a type that defines a method signature and it can pass a function as a parameter. In simple words we can say delegate is a . NET object which points to a method that matches its specific signature. A delegate is independent of the type of method that it references.

What is the advantage of using delegates in C#?

Delegates allow methods to be passed as parameters. Delegates are type safe function pointer. Delegate instances attach or detach a method at run time making it more dynamic and flexible to use. Delegates can invoke more than one method using the Multicast feature.

How do you declare a delegate?

A delegate can be declared using the delegate keyword followed by a function signature, as shown below. The following declares a delegate named MyDelegate . public delegate void MyDelegate(string msg); Above, we have declared a delegate MyDelegate with a void return type and a string parameter.

What are delegate classes?

Represents a delegate, which is a data structure that refers to a static method or to a class instance and an instance method of that class.

Where did you use delegates in your project?

Let me tell you a few important points about delegates. These are used to represent or refer to one or more functions. These can only be used to define call-back methods. In order to consume a delegate, we need to create an object to delegate.

What are the advantages of using delegates in C#?

Important Sticky

• Delegates allow methods to be passed as parameters.
• Delegates are type safe function pointer.
• Delegate instances attach or detach a method at run time making it more dynamic and flexible to use.
• Delegates can invoke more than one method using the Multicast feature.
• Delegates are of reference types.

What are delegates advantages?

What is the function of a delegate?

A delegate is a form of type-safe function pointer used by the Common Language Infrastructure (CLI). Delegates specify a method to call and optionally an object to call the method on. Delegates are used, among other things, to implement callbacks and event listeners.

What is delegate model of representation?

The delegate model of representation is a model of a representative democracy. In this model, constituents elect their representatives as delegates for their constituency. These delegates act only as a mouthpiece for the wishes of their constituency, and have no autonomy from the constituency.

What is a C# delegate?

C# delegates are similar to pointers to functions, in C or C++. A delegate is a reference type variable that holds the reference to a method. The reference can be changed at runtime. Delegates are especially used for implementing events and the call-back methods.