How to create a list of methods then execute them in C#?

How to create a list of methods then execute them in C#?

To create a list of methods and then execute them in C# you can use a List<Action> to hold a list of delegate methods, and then loop through the list and invoke each method.

Here's an example of how to do this:

using System; using System.Collections.Generic; public class Program { public static void Main() { List<Action> methodList = new List<Action>(); methodList.Add(Method1); methodList.Add(Method2); methodList.Add(Method3); // Loop through the list of methods and invoke each one foreach (Action method in methodList) { method(); } } public static void Method1() { Console.WriteLine("Method 1"); } public static void Method2() { Console.WriteLine("Method 2"); } public static void Method3() { Console.WriteLine("Method 3"); } }

In this example, we create a List<Action> named methodList and add three methods to it using the Add method. Each method added to the list must have a return type of void and no parameters.

We then loop through the methodList using a foreach loop, and invoke each method by calling the method as a delegate using the () operator.

The output of running this program would be:

Method 1 Method 2 Method 3

This shows that each of the three methods in the list was executed in the order they were added.

Examples

  1. "C# create a list of Action delegates"

    // Code: List<Action> actionList = new List<Action>();

    Description: Initializes an empty list of Action delegates, which are methods without parameters and return type.

  2. "C# add methods to a list and execute them"

    // Code: List<Action> actionList = new List<Action>(); actionList.Add(() => Method1()); actionList.Add(() => Method2()); // Execute all methods in the list foreach (var action in actionList) { action(); }

    Description: Demonstrates adding methods to a list of Action delegates and then executing them using a loop.

  3. "C# list of Func delegates with parameters"

    // Code: List<Func<int, string>> funcList = new List<Func<int, string>>();

    Description: Initializes an empty list of Func delegates with parameters and a return type.

  4. "C# add parameterized methods to a list and execute them"

    // Code: List<Func<int, string>> funcList = new List<Func<int, string>>(); funcList.Add((x) => MethodWithParameter(x)); // Execute all methods in the list foreach (var func in funcList) { string result = func(42); }

    Description: Adds parameterized methods to a list of Func delegates and executes them with specified parameters.

  5. "C# execute methods asynchronously from a list"

    // Code: List<Func<Task>> asyncFuncList = new List<Func<Task>>(); // Add asynchronous methods to the list asyncFuncList.Add(async () => await AsyncMethod1()); // Execute all asynchronous methods in the list await Task.WhenAll(asyncFuncList.Select(func => func()));

    Description: Shows how to execute asynchronous methods from a list and wait for all of them to complete.

  6. "C# create a list of method references"

    // Code: List<Action> methodList = new List<Action> { Method1, Method2 };

    Description: Initializes a list of methods directly, taking advantage of method references.

  7. "C# execute methods conditionally from a list"

    // Code: List<Action> actionList = new List<Action>(); // Add methods to the list conditionally if (condition) { actionList.Add(() => ConditionalMethod()); } // Execute all methods in the list foreach (var action in actionList) { action(); }

    Description: Adds methods to the list conditionally based on a specific condition and then executes them.

  8. "C# list of methods with return values"

    // Code: List<Func<string>> stringMethodList = new List<Func<string>>();

    Description: Initializes an empty list of methods with return values.

  9. "C# execute methods with return values and collect results"

    // Code: List<Func<string>> stringMethodList = new List<Func<string>> { () => GetStringMethod1(), () => GetStringMethod2() }; List<string> results = stringMethodList.Select(func => func()).ToList();

    Description: Executes methods with return values from the list and collects the results in a new list.

  10. "C# execute methods in parallel from a list"

    // Code: List<Action> actionList = new List<Action> { Method1, Method2, Method3 }; Parallel.ForEach(actionList, action => action());

    Description: Executes methods in parallel from a list using Parallel.ForEach.

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