Localization in EnumDropDownListFor using asp.net boilerplate - asp.net

Question

I have an enum dropdown
//control
#Html.EnumDropDownListFor(
m => m.OrderBy,
new {#class = "btn btn-default dropdown-toggle toggle", onchange = "document.getElementById('hf_Pagename').value,this.form.submit();"})
//my enum
public enum OrderByOptions
{
Default,
PriceLowToHigh,
PriceHighToLow,
MostRecent
}
Now the problem is I need to localize them. But in this case from" PriceLowToHigh" needs to change to " Price- low to high"

Answer 1

You can use AbpDisplayNameAttribute:
public enum OrderByOptions
{
[AbpDisplayName(MyConsts.LocalizationSourceName, "OrderByOptions.Default")]
Default,
[AbpDisplayName(MyConsts.LocalizationSourceName, "OrderByOptions.PriceLowToHigh")]
PriceLowToHigh,
[AbpDisplayName(MyConsts.LocalizationSourceName, "OrderByOptions.PriceHighToLow")]
PriceHighToLow,
[AbpDisplayName(MyConsts.LocalizationSourceName, "OrderByOptions.MostRecent")]
MostRecent
}
Define them in your localization files:
<text name="OrderByOptions.PriceLowToHigh">Price - Low to High</text>
Update
AbpDisplayName works on type class
You can define:
[AttributeUsage(AttributeTargets.Field)]
public class FieldAbpDisplayNameAttribute : AbpDisplayNameAttribute
{
// ...
}
Then use [FieldAbpDisplayNameAttribute(...)] instead.

Answer 2

There are many ways to achieve the issue.
Way #1
Don't use #Html.EnumDropDownListFor! Just traverse enum and create the html element like below;
(I am writing the code on the top of my head)
<select>
#foreach (var item in Enum.GetValues(typeof(OrderByOptions)))
{
<option value="#((int)item)">#(Localize(item.ToString()))</option>
}
</select>
There's no Localize method. Just localize it with your way.
Way #2
Other alternative is not using enum but create a dropdown item collection. And let an item consist of DisplayText and Value. Display Text must be localized from server.
Way #3
Follow the instructions explained here:
https://ruijarimba.wordpress.com/2012/02/17/asp-net-mvc-creating-localized-dropdownlists-for-enums/

Answer 3

With the information above, I solve my problem this way.
I created a custome Attribute AbpEnumDisplayNameAttribute inherited from AbpDisplayNameAttribute.
[AttributeUsage(AttributeTargets.Field)]
public class AbpEnumDisplayNameAttribute : AbpDisplayNameAttribute
{
/// <summary>
/// <see cref="AbpDisplayNameAttribute"/> for enum values.
/// </summary>
public AbpEnumDisplayNameAttribute(string sourceName, string key) : base(sourceName, key)
{
}
}
Then I created an extension for Enum display value localization.
public static class EnumLocalizationExtension
{
public static string ToLocalizedDisplayName(this Enum value)
{
var displayName = value.ToString();
var fieldInfo = value.GetType().GetField(displayName);
if (fieldInfo != null)
{
var attribute = fieldInfo.GetCustomAttributes(typeof(AbpEnumDisplayNameAttribute), true)
.Cast<AbpEnumDisplayNameAttribute>().Single();
if (attribute != null)
{
displayName = attribute.DisplayName;
}
}
return displayName;
}
}