Value DataTextField with DataAnnotations

[Dario]

I have a comboBox

@(Html.Kendo().ComboBox()
                    .Name("contactTypeDropDownList")
                    //.DataTextField("Type") ??
                    //.DataValueField("Type") ??
                    .DataSource(source =>
                    {
                            source.Read(read =>
                            {
                                read.Action("GetContactTypes", "ListBox");
                            })
                            .ServerFiltering(true);
                    })
                    .SelectedIndex(0)

 

the action returns items of enum

public IActionResult GetContactTypes()
{
    var contactTypes = new List<ContactTypes>();

    contactTypes.Add(ContactTypes.Company);
    contactTypes.Add(ContactTypes.Person);

    return Json(contactTypes);
}

 

this enum contains DataAnnotation with "caption"

public enum ContactTypes
    {
        [Display(Name = "Società")]
        Company = 0,
        [Display(Name = "Persona")]
        Person = 1
    }

 

how can I retrieve this "caption" into DataTextField property? 

 

 

[Dimitar]

Hello Dario,

One possible approach of tackling this issue is to create a list out of the enum, by also retrieving the DisplayName custom attribute:

1) Sample controller implementation:

public IActionResult GetContactTypes()
{            
    var contactTypes = new List<object>();
    var list = new List<object>();
    foreach (var item in Enum.GetValues(typeof(ContactTypes)))
    {
        var displayAttribute = item
            .GetType()
            .GetMember(item.ToString())
            .First()
            .GetCustomAttribute<DisplayAttribute>().Name;

         list.Add(new { Text = displayAttribute, Value = (int)item });
     }

     return Json(list);
}
    

2) Specify the DataTextField and DataValueField options according top the returned JSON data:

@(Html.Kendo().ComboBox()
    .Name("products")
    .DataTextField("Text")
    .DataValueField("Value")
    .DataSource(source =>
    {
            source.Read(read =>
            {
                read.Action("GetContactTypes", "Home");
            })
            .ServerFiltering(true);
    })
)

Regards,
Dimitar
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