How to convert a string to a enum?

问题

I'm trying to convert a string to a enum value in PowerShell but couldn't find this anywhere...

I'm getting a JSON result, where I only want to consume the Healthstate which is defined as a string.

enum HealthState
{
    Invalid = 0
    Ok = 1
    Warning = 2
    Error = 3
    Unknown = 65535
}
$jsonResult = "Ok"
$HealthStateResultEnum = [Enum]::ToObject([HealthState], $jsonResult) 

Thanks in advance.

回答1:

You can simply cast the string result as the Enum type:

$HealthStateResultEnum = [HealthState]$jsonResult

This will work whether $jsonResult contains a string or value from the enum type.

回答2:

Assuming you want to get the value__ of the enum:

PS> [Enum]::GetValues([HealthState])|? {$_ -eq $JSonresult}|Select @{n="Name";e={"$_"}},value__

Name value__
---- -------
Ok         1

Or simply

PS> [int]([HealthState]$jsonResult)
1

来源：https://stackoverflow.com/questions/52889230/how-to-convert-a-string-to-a-enum