A delegate is a type-safe reference pointing to a method in C# and has the following main functions: allowing the method to execute in an asynchronous or event-driven mode. Provides code modularization and reuse mechanisms. Implement callback function.
Delegates in C
#A delegate is a type-safe reference to a method. It allows methods to be passed as parameters to other methods, thus enabling code reusability and modularity.
Function:
The main function of the delegate is:
Syntax:
The syntax of delegation is as follows:
<code>public delegate <return_type> <delegate_name>(<parameter_list>);</code>
Among them:
: The type returned by the delegate, which can be any type, including void.
: The name of the delegate.
: The parameter list of the delegate method.
Usage:
To use a delegate, you need to perform the following steps:Example:
Here is an example of using a delegate:<code class="csharp">// 定义委托类型 public delegate int CalculateDelegate(int a, int b); // 创建委托实例 CalculateDelegate calculate = (a, b) => a + b; // 调用委托 int result = calculate(10, 20);</code>
CalculateDelegate The delegate type is declared as a method that accepts two integers and returns an integer. Then, a delegate instance
calculate is created that points to an anonymous method that adds two integers. Finally, the
calculate delegate instance is called, adding the two integers and storing them in the
result variable.
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