How to get all defined names in an enum type using Enum.GetNames function in C#

In C#, the enumeration type is a very useful data type, which allows us to define some constants to represent certain states or options. Once the enum type is defined, you can use the Enum.GetNames function to get all defined names. This article details how to use this function and provides specific code examples.

1. What is the Enum.GetNames function

The Enum.GetNames function is a static method that returns a string array of the specified enumeration type, where each string Both represent the name of a named constant defined by the enumeration type.

The syntax of this function is as follows:

public static string[] GetNames(Type enumType);

Among them, enumType is a Type type parameter, indicating that the name is to be obtained Enumeration type.

2. How to use the Enum.GetNames function

Using the Enum.GetNames function to get the names of all definitions in an enumeration type is very simple, just follow these steps:

Step 1: Define an enumeration type

First, you need to define an enumeration type, for example:

public enum Season {
Spring,
Summer ,
Autumn,
Winter
}

This enumeration type defines the constant values ​​of the four seasons: Spring, Summer, Autumn and Winter.

Step 2: Call the Enum.GetNames function

Next, you can call the Enum.GetNames function in the code to get the name, for example:

string[] seasonNames = Enum .GetNames(typeof(Season));

Among them, typeof(Season) returns a Type object of the Season type, indicating the enumeration type of the name to be obtained. Calling the Enum.GetNames method returns all the names defined in the enumeration type and puts them into a string array.

Step 3: Use the obtained name

Finally, you can use the obtained name array to perform various operations. For example, you can iterate over the array and print out all the names like this:

foreach (string name in seasonNames) {
Console.WriteLine(name);
}

Output The result is as follows:

Spring
Summer
Autumn
Winter

3. Complete sample code

The following is a complete sample Code, use the Enum.GetNames function to get all defined names in the Season enumeration type and output them:

using System;

public enum Season {
Spring,
Summer,
Autumn,
Winter
}

class Program {
static void Main(string[] args) {

  string[] seasonNames = Enum.GetNames(typeof(Season));

  foreach (string name in seasonNames) {
     Console.WriteLine(name);
  }

}
}

The output results are as follows:

Spring
Summer
Autumn
Winter

4. Summary

Use the Enum.GetNames function Getting all the names defined in an enumeration type is very simple. Just define an enumeration type, then use the typeof operator to get its Type object, and finally call the Enum.GetNames method. The obtained name can be used for various operations, such as outputting to the console, writing to a file, etc.

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