You are welcome to use this package https://our.umbraco.com/packages/developer-tools/umbraco-dictionary-metadataprovider/ this is very easy way to add translation using naming convention in dictionary

Hi Yakov,

Thanks a lot for your reply. Managed to install the package.

One more question: is there any way to have the full validation message using the dictionary item value instead of a combination of RequiredAttribute validation message and dictionary value?

Eg: "The PropertyReference field is required." - this is the full validation message "PropertyReference" - gets from the dictionary value, but rest is default RequiredAttribute validation message

You should manage it in this way

your model for example ContactModel, has 2 properties Name, Email

you should create in dictionary

-Contact

--Contact.Name

--Contact.Email

if you have attribues (for example Required) on you model

--Contact.Name.Required

for name convention properties you can create

RequiredFormat: {0} is required InvalidFormat: {0} is invalid

{0} this is name of property

Found another way to use dictionary item values as validation messages

First step is, inside the model class use "IValidatableObject" interface to implement your own validation checks. For example, I'm using a simple null check.

public class LoginModel:IValidatableObject
{
    [DisplayName("property ref number")]
    public string PropertyReference { get; set; }

    [DataType(DataType.Password)]
    [AllowHtml]
    public string Password { get; set; }

    public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
    {
        if (string.IsNullOrWhiteSpace(PropertyReference))
            yield return new ValidationResult(UmbracoDictionary.GetDictionaryValue("Login.PropertyReference"));

        if (string.IsNullOrWhiteSpace(Password))           
            yield return new ValidationResult(UmbracoDictionary.GetDictionaryValue("Login.Password"));         
    }
}

Then create a separate class "UmbracoDictionary" which will allow you to access Umbraco dictionary items

public class UmbracoDictionary
{
    private static UmbracoHelper _helper;

    private static UmbracoHelper Helper
    {
        get
        {
            if (_helper == null)
            {
                _helper = new UmbracoHelper();
            }
            return _helper;
        }
    }

    public static string GetDictionaryValue(string resourceKey)
    {
        string key = Helper.GetDictionaryValue(resourceKey);
        if (!string.IsNullOrEmpty(key))
            return key;
        return resourceKey;
    }
}

Finally, you can use ValidationSummary() inside your view page to display validation messages

@Html.ValidationSummary()

This is instesting way, but you need implement all validations by yourself.

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