Enum.Parse（）或Switch [英] Enum.Parse() or Switch

问题描述

要将字符串转换为枚举，以下哪种方式更好？

For converting a string to an enum, which of the following ways is better?

1. 此代码：

1. This code:

colorEnum color = (colorEnum)Enum.Parse(typeof(colorEnum), "Green");

或这个：

or this:

string colorString = ...
colorEnum color;        
switch (colorString)
{
    case "Green":
        color = colorEnum.Green;
        break;
    case "Red":
        color = colorEnum.Red;
        break;
    case "Orange":
        color = colorEnum.Orange;
        break;
    ....
}

推荐答案

您应该使用Enum.TryParse，如果失败，您可以正确处理错误。

You should use the Enum.TryParse, if it fails you can handle the error correctly.

示例： / p>

sample:

     ColorsEnum colorValue; 
     if (Enum.TryParse(colorString, out colorValue))        
        if (Enum.IsDefined(typeof(Colors), colorValue) | colorValue.ToString().Contains(","))  
           Console.WriteLine("Converted '{0}' to {1}.", colorString, colorValue.ToString());
        else
           Console.WriteLine("{0} is not an underlying value of the Colors enumeration.", colorString);
     else
        Console.WriteLine("{0} is not a member of the Colors enumeration.", colorString);

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