Help with enums

[nomad]

Hi,

I would like to create a enum which consists of contenttype i.e. text/
xml and application/x-www-form-urlencoded. Would this be possible?

Appreciate any suggestions.

[Marc Gravell]

Re: Help with enums

Well, the attribute itself cannot take that form, but you could use an
attribute to do this; the following is not very optimised (you could
cache the pairs in a static list/dictionary) - but works for
illustration:

Marc

using System;
using System.Reflecti on;

static class Program
{
static void Main()
{
ContentTypes ct = ContentTypes.Ur lEncoded;
string mime = ContentType.Get Mime(ct);
ContentTypes parsed = ContentType.Par se(mime);
}
}

[AttributeUsage( AttributeTarget s.Field, AllowMultiple = false,
Inherited = true)]
public sealed class MimeAttribute : Attribute
{
public MimeAttribute(s tring contentType)
{
ContentType = contentType;
}
public string ContentType { get; private set; }
}
public enum ContentTypes
{
[Mime(@"text/xml")]
Xml,
[Mime(@"applicat ion/x-www-form-urlencoded")]
UrlEncoded
}
static class ContentType
{
public static ContentTypes Parse(string mime)
{
foreach (FieldInfo field in typeof(ContentT ypes).GetFields ())
{
MimeAttribute attrib = Attribute.GetCu stomAttribute(f ield,
typeof(MimeAttr ibute))
as MimeAttribute;
if (attrib != null && attrib.ContentT ype == mime)
{
return (ContentTypes) field.GetValue( null);
}
}
throw new ArgumentExcepti on("mime");
}
public static string GetMime(Content Types contentType)
{
FieldInfo field =
typeof(ContentT ypes).GetField( contentType.ToS tring());
if (field != null)
{
MimeAttribute attrib = Attribute.GetCu stomAttribute(f ield,
typeof(MimeAttr ibute))
as MimeAttribute;
if (attrib != null) return attrib.ContentT ype;
}
throw new ArgumentExcepti on("contentType ");
}
}

[Marc Gravell]

Re: Help with enums

"the attribute itself "

should have read "the enum itself".

BTW - it could be done a lot more simply with static string properties
or string constants:

public static class ContentTypes
{
public const string
Xml = @"text/xml",
UrlEncoded = @"applicatio n/x-www-form-urlencoded";
}

Marc

[=?Utf-8?B?anAybXNmdA==?=]

RE: Help with enums

Enums are wonderful, especially when it comes to understanding your code.

You can certainly create your own enum. What are your different values?

Example:
enum XmlContentType { type1, type2, type3 }

The trick is: you have to define your own enums to suit your needs/wants.

"nomad" wrote:

Hi,
>
I would like to create a enum which consists of contenttype i.e. text/
xml and application/x-www-form-urlencoded. Would this be possible?
>
Appreciate any suggestions.
>

[nomad]

Re: Help with enums

On Jun 12, 2:30 pm, jp2msft <jp2m...@discus sions.microsoft .comwrote:

Enums are wonderful, especially when it comes to understanding your code.
>
You can certainly create your own enum. What are your different values?
>
Example:
enum XmlContentType { type1, type2, type3 }
>
The trick is: you have to define your own enums to suit your needs/wants.
>
"nomad" wrote:

Hi,

>

I would like to create a enum which consists of contenttype i.e. text/
xml and application/x-www-form-urlencoded. Would this be possible?

>

Appreciate any suggestions.

Marc,

Thanks very much for your reply. I think by the look of it it would
be simpler to do public constants.

Thanks again.