Subject: retrieving the XmlEnumAttribut e values for an Enum

[Edward Clements]

I have an enum defined as
public enum velocityUom
{ /// <remarks/>
[System.Xml.Seri alization.XmlEn umAttribute("m/s")]
ms,

/// <remarks/>
[System.Xml.Seri alization.XmlEn umAttribute("cm/a")]
cma,
...
}

This class was generated by xsd.exe, from a schema like
<xsd:simpleTy pe name="velocityU om">
<xsd:enumeratio n value="m/s"/>
<xsd:enumeratio n value="cm/a"/>
....
</xsd:restriction >
</xsd:simpleType>

I would like to retrieve the XmlEnumAttribut e values for this Enum so that I
can create a combo box with values like "m/s", "cm/a", ... so that I don't
have to hard-code the XML-enum values in my code.

Is there any way to do this? the MSDN examples are only to add extra enum
values for a class and Enum.GetNames() just retrieves "ms", "cma", ...

Thanks,

Edward Clements

[Edward Clements]

I forgot to mention that I use .Net v2.0

Edward

"Edward Clements" wrote:

I have an enum defined as
public enum velocityUom
{ /// <remarks/>
[System.Xml.Seri alization.XmlEn umAttribute("m/s")]
ms,

/// <remarks/>
[System.Xml.Seri alization.XmlEn umAttribute("cm/a")]
cma,
...
}

This class was generated by xsd.exe, from a schema like
<xsd:simpleTy pe name="velocityU om">
<xsd:enumeratio n value="m/s"/>
<xsd:enumeratio n value="cm/a"/>
...
</xsd:restriction >
</xsd:simpleType>

I would like to retrieve the XmlEnumAttribut e values for this Enum so that I
can create a combo box with values like "m/s", "cm/a", ... so that I don't
have to hard-code the XML-enum values in my code.

Is there any way to do this? the MSDN examples are only to add extra enum
values for a class and Enum.GetNames() just retrieves "ms", "cma", ...

Thanks,

Edward Clements

[Oleg Tkachenko [MVP]]

A bit of reflection can do this:

Type enumType = typeof(velocity Uom);
foreach (FieldInfo fi in enumType.GetFie lds())
{
object[] attrs = fi.GetCustomAtt ributes(typeof( XmlEnumAttribut e), false);
if (attrs.Length > 0)
{
Console.WriteLi ne(((XmlEnumAtt ribute)attrs[0]).Name);
}
}

--
Oleg Tkachenko [XML MVP, MCAD]
http://www.XmlLab.Net | http://www.XLinq.Net | http://blog.tkachenko.com

Edward Clements wrote:

I have an enum defined as
public enum velocityUom
{ /// <remarks/>
[System.Xml.Seri alization.XmlEn umAttribute("m/s")]
ms,

/// <remarks/>
[System.Xml.Seri alization.XmlEn umAttribute("cm/a")]
cma,
...
}

This class was generated by xsd.exe, from a schema like
<xsd:simpleTy pe name="velocityU om">
<xsd:enumeratio n value="m/s"/>
<xsd:enumeratio n value="cm/a"/>
...
</xsd:restriction >
</xsd:simpleType>

I would like to retrieve the XmlEnumAttribut e values for this Enum so that I
can create a combo box with values like "m/s", "cm/a", ... so that I don't
have to hard-code the XML-enum values in my code.

Is there any way to do this? the MSDN examples are only to add extra enum
values for a class and Enum.GetNames() just retrieves "ms", "cma", ...

Thanks,

Edward Clements

[Edward Clements]

Oleg,

Thanks for the idea and especially for the code sample; it works quite well!

Only, I couldn't find any way to connect the enumeration (int) value to the
XML string value -- for example, if the user selects "cm/a" from the combo
box, how would the program know that it should use velocityUom.ms? I could
use just a counter in the foreach() loop, but
a) would that work ok?
b) that would not take care of the situation where the enum values are not
sequential starting from zero

Could you please help?

Thanks,

Edward Clements

"Oleg Tkachenko [MVP]" wrote:

A bit of reflection can do this:

Type enumType = typeof(velocity Uom);
foreach (FieldInfo fi in enumType.GetFie lds())
{
object[] attrs = fi.GetCustomAtt ributes(typeof( XmlEnumAttribut e), false);
if (attrs.Length > 0)
{
Console.WriteLi ne(((XmlEnumAtt ribute)attrs[0]).Name);
}
}

--
Oleg Tkachenko [XML MVP, MCAD]
http://www.XmlLab.Net | http://www.XLinq.Net | http://blog.tkachenko.com

Edward Clements wrote:

I have an enum defined as
public enum velocityUom
{ /// <remarks/>
[System.Xml.Seri alization.XmlEn umAttribute("m/s")]
ms,

/// <remarks/>
[System.Xml.Seri alization.XmlEn umAttribute("cm/a")]
cma,
...
}

This class was generated by xsd.exe, from a schema like
<xsd:simpleTy pe name="velocityU om">
<xsd:enumeratio n value="m/s"/>
<xsd:enumeratio n value="cm/a"/>
...
</xsd:restriction >
</xsd:simpleType>

I would like to retrieve the XmlEnumAttribut e values for this Enum so that I
can create a combo box with values like "m/s", "cm/a", ... so that I don't
have to hard-code the XML-enum values in my code.

Is there any way to do this? the MSDN examples are only to add extra enum
values for a class and Enum.GetNames() just retrieves "ms", "cma", ...

Thanks,

Edward Clements

[Oleg Tkachenko [MVP]]

Edward Clements wrote:

Only, I couldn't find any way to connect the enumeration (int) value to the
XML string value -- for example, if the user selects "cm/a" from the combo
box, how would the program know that it should use velocityUom.ms? I could
use just a counter in the foreach() loop, but
a) would that work ok?
b) that would not take care of the situation where the enum values are not
sequential starting from zero

Well, combobox items have both text and value behind. That's your
responsibility to make sure that with "cm/a" item in a combobox has
velocityUom.ms value.

--
Oleg Tkachenko [XML MVP, MCAD]
http://www.XmlLab.Net | http://www.XLinq.Net | http://blog.tkachenko.com

[Edward Clements]

Oleg,

Sorry, I didn't make myself clear -- what I'd like to know is, while looping
through the FieldInfo to get the string XMLEnumAttribut es, whether it is
possible to retrieve the corresponding enumerated (int) value for each
string; I could use just a counter in the foreach() loop, but
a) would that work ok?
b) that would not take care of the situation where the enum values are not
sequential starting from zero

Thanks,

Edward Clements
"Oleg Tkachenko [MVP]" wrote:

Well, combobox items have both text and value behind. That's your
responsibility to make sure that with "cm/a" item in a combobox has
velocityUom.ms value.

--
Oleg Tkachenko [XML MVP, MCAD]
http://www.XmlLab.Net | http://www.XLinq.Net | http://blog.tkachenko.com