Matching vb.net string value to c# enum

Question

I am using an enum that was created in c#:

public enum ParamChildKey
{
    [EnumMember(Value = "SYS")]
    System,
    [EnumMember(Value = "GAT")]
    Gate,
    [EnumMember(Value = "CRT")]
    Create,
    [EnumMember(Value = "FLT")]
    Fault,
}

I am writing code in vb.net and have a vb.net String, say "CRT" that I am trying to match up with its enum so I can pass the enum into a function.

When I write ParamChildKey.Create.ToValue I get a string value of "CRT" however when I use [Enum].GetValues it returns the integer index of each enum, "2" in this case.

My question is how do I get the enum by matching a string value to it so I can pass the enum into a function? So if I have a string value of "CRT" how do I get ParamChildKey.Create from the "CRT" string value? In this example I will be passing in ParamChildKey.Create into the function below.

GetParameterValue(paramName As Integer, Optional paramChildKey As ParamChildKey = ParamChildKey.System)

enum.ToObject ?? msdn.microsoft.com/en-us/library/…

T.S.
– T.S.

2015-10-23 02:59:56 +00:00
Commented Oct 23, 2015 at 2:59 — T.S.
– T.S., Commented Oct 23, 2015 at 2:59

Abdullah Nehir · Accepted Answer · 2015-10-23 11:52:56Z

1

EnumMemberAttribute is used for serialization purposes. So it's not useful in your scenario.

IMO simplest solution would be writing a swtich-case statement.

switch(textValue){
    case "CRT":
       return ParamChildKey.Create;
    ...
}

If you have a dynamic set of enumerations which change over time, you can use System.Reflection library but this performs much worse than statically written and compiled code.

answered Oct 23, 2015 at 11:52

Abdullah Nehir

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1 Comment

Mark Over a year ago

I thought I may just have to use a Select-Case statement. I was hoping there was a way around it. I am stuck on .NET 3.5 right now so TryParse isn't available to me.

Community · Accepted Answer · 2017-05-23 12:23:36Z

0

To convert an string to an enum, use the [Enum].TryParse method which is available in .NET 4.

Dim p As ParamChildKey
If [Enum].TryParse("CRT", p) Then
    Console.WriteLine(p)
    Console.WriteLine(p.ToString())
End If

If using .NET 3.5 or below, you can use this version https://stackoverflow.com/a/1082587/3230456

edited May 23, 2017 at 12:23

CommunityBot

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answered Oct 23, 2015 at 10:49

codersl

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