Question

我试图将一些排入物体。情况如下:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <appSettings>
    <add key="Logging_default_path" value="C:Temp" />
    <add key="Logging_max_file_size" value="10485760" />
    <add key="Logging_levels" value="Error,Warning,Info"/>
    <add key="Logging_filename" value="RobinsonLog" />
  </appSettings>
</configuration>

The Logging_levels represents several enum values that are allowed by the settings. I m trying to load these into my object by using the following code:

Level = (LogLevel)Enum.Parse(typeof(LogLevel), settings["Logging_levels"]);

但是,这并不奏效,我只想达到后勤水平。信息回来,而不是后勤水平的价值。离职偿金。预警数据。信息。表格的定义如下:

[Flags]
public enum LogLevel
{
    Error = 0x0,
    Warning = 0x1,
    Info = 0x2,
    Debug = 0x3,
    Performance = 0x4
}

我错过了,用黑手法界定了价值观? 或者我是否对其他东西有误解?

Answer 1

您的<代码>enum值将引起问题。

<代码>Flags>> 必须有两种权力,除某种空洞/无标志外,任何价值不得使用0。

这是否有什么变化?

[Flags]
public enum LogLevel
{
    None        =  0
    Error       =  1,
    Warning     =  2,
    Info        =  4,
    Debug       =  8,
    Performance = 16
}

Answer 2

适当的旗帜价值可能有助于(每种价值应当设定一个不同的轨道):

[Flags]
public enum LogLevel
{
    None = 0x0,
    Error = 0x1,
    Warning = 0x2,
    Info = 0x4,
    Debug = 0x8,
    Performance = 0x10
}

注:如果你愿意,你可以删除。

Answer 3

价值参数包括一个计数成员的基本价值或名数的固定数值,或一个按 com号划定的标明的固定数(即)清单。一个或一个以上空白处可预设或按价值按每块价值、名称或 com。如果价值是一份清单,则收益价值是指特定名称的价值,加上双向其他资源业务。

So it should work, and ik looks like it does:

LogLevel level = (LogLevel)Enum.Parse(typeof(LogLevel), "Error,Warning");

if ((level & LogLevel.Error) == LogLevel.Error)
{
    Console.WriteLine("Error");
}

if ((level & LogLevel.Warning) == LogLevel.Warning)
{
    Console.WriteLine("Warning");
}

if ((level & LogLevel.Info) == LogLevel.Info)
{
    Console.WriteLine("Info");
}

Gives me “Error” and “Warning”。然而,通过在视觉演播室检查<条码>级的可变性,它只显示“交战”。也许,这会使你失去意义。

Edit: @svick 和@jv42 是正确的,你的旗帜价值是错误的。

Answer 4

问题 t! 问题在于改为案文。由于国旗值是独一无二的比照面罩,因此没有定型绘图以示和背。正如其他人提到的那样,你应当选择诸如:

[Flags]
public enum LogLevel
{
    None = 0
    Error = 1 << 0,
    Warning = 1 << 1,
    Info = 1 << 2,
    // etc
}

见。MSDN: Parsing Enumer Values

See a demo Live: https://ideone.com/8AkSQ

using System;

[Flags] enum Colors { None=0, Red = 1, Green = 2, Blue = 4 };

public class Example
{
   public static void Main()
   {
      string[] colorStrings = { "0", "2", "8", "blue", "Blue", "Yellow", "Red, Green" };
      foreach (string colorString in colorStrings)
      {
         try {
            Colors colorValue = (Colors) Enum.Parse(typeof(Colors), colorString);        
            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);
         }
         catch (ArgumentException) {
            Console.WriteLine(" {0}  is not a member of the Colors enumeration.", colorString);
         }
      }
   }
}

产出:

Converted  0  to None.
Converted  2  to Green.
8 is not an underlying value of the Colors enumeration.
 blue  is not a member of the Colors enumeration.
Converted  Blue  to Blue.
 Yellow  is not a member of the Colors enumeration.
Converted  Red, Green  to Red, Green.

Performance Note:

如果业绩很重要,那么不是依靠Enum.Parse :

见。

Performance Note:

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