将枚举转换为布尔值的转换器类 [英] Converter Class which is convert enum to boolean

问题描述

hi Friend

我将枚举转换为布尔值，如

枚举
abc 0
xyz 1
asd 2

使用vonverter类在boolena中转换这些值指导我plz

hi Friend

i wnat convert enum to boolean value like

enum
abc 0
xyz 1
asd 2

convert these value in boolena using vonverter class guide me plz

推荐答案

好吧，布尔型只能表示2个值，true和false，我可以看到如何转换一个枚举要布尔.

您仍然可以建立一些规则，并在ex发言.如果enum的值为0，则为false，否则为true.

函数将如下所示:

Well as Boolean can only represent 2 values, true and false, I can see how can you convert an enum to bool.

Still you can establish some rules and say at ex. that if value of enum is 0 than is false, otherwise it is true.

A function will look like this:

Public Function GetBoolFromEnum(e As MyEnum) As Boolean
    Return CInt(e) = 0
End Function

Enum MyEnum
    asdf = 1
    fdsa = 2
    tre = 3
End Enum

干杯

Cheers

好吧，

布尔值可以是TRUE或FALSE.

通常，枚举用于为名称赋予特定的值，并使代码更易于阅读.

阅读这些链接:

有关.NET枚举的提示 [ http://msdn.microsoft.com/en-us/library/8h84wky1 (v = vs.80).aspx [ http://www.dotnetperls.com/enum-vbnet [

Well,

A boolean value can be TRUE or FALSE.

Typically enums are used to give names a specific value and make the code easier to read.

Read those links:

Tips about .NET Enums[^]
http://msdn.microsoft.com/en-us/library/8h84wky1(v=vs.80).aspx[^]
http://www.dotnetperls.com/enum-vbnet[^]

Those are links to articles that speak about enums.

If you want to convert the values to boolean, then I would simply make something like

Public Enum MyEnum
    alfa = 1
    beta = 0
    gamma = 1
  End Enum

然后使用函数来区分1(TRUE)和0(FALSE).

祝你好运.

And then use a function to discriminate between 1 (TRUE) and 0 (FALSE).

Good luck.

可能会有所帮助.
1.

May be some help.
1.

result = Convert.ToBoolean(number) 

参考: http://msdn.microsoft.com/en-us/library/h0b8dwce [ ^ ]

2.

Ref: http://msdn.microsoft.com/en-us/library/h0b8dwce[^]

2.

Module Example
   Public Sub Main()
      Dim values() As String = { Nothing, String.Empty, "True", "False", 
                                 "true", "false", "    true    ", "0", 
                                 "1", "-1", "string" }
      For Each value In values
         Try 
            Dim flag As Boolean = Boolean.Parse(value)
            Console.WriteLine("'{0}' --> {1}", value, flag)
         Catch e As ArgumentException
            Console.WriteLine("Cannot parse a null string.")
         Catch e As FormatException
            Console.WriteLine("Cannot parse '{0}'.", value)
         End Try          
      Next                                      
   End Sub 
End Module 
' The example displays the following output: 
'       Cannot parse a null string. 
'       Cannot parse ''. 
'       'True' --> True 
'       'False' --> False 
'       'true' --> True 
'       'false' --> False 
'       '    true    ' --> True 
'       Cannot parse '0'. 
'       Cannot parse '1'. 
'       Cannot parse '-1'. 
'       Cannot parse 'string'.

参考:
http://msdn.microsoft.com/en-us/library/system. boolean.parse.aspx#Y792 [ ^ ]

Ref:
http://msdn.microsoft.com/en-us/library/system.boolean.parse.aspx#Y792[^]

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