MVC3 ValidationAttribute validationContext.memberName - null

Question

I find half the solutions everywhere, but I can’t get a real answer for this.

I created a validation attribute that inherits from ValidationAttribute and IClientValidatable.

Everything seems to be working fine, and if I put a check summary on the page, an error will appear.

however, I cannot get an error message next to the text box related to the property.

I think this is due to the fact that I need to add the name of the property to the check result.

HOWEVER, this is where it fails because I cannot get the member name from validationContext.

is there any way for this to happen? Or am I missing something?

public class AdmissionDayCaseAttribute : ValidationAttribute, IClientValidatable
{
    private String DayCaseID;
    private String AdmissionDateID;
    private String DischargeDateID;

    public AdmissionDayCaseAttribute(String DayCaseID, String AdmissionDateID, String DischargeDateID)
    {
        this.DayCaseID = DayCaseID;
        this.AdmissionDateID = AdmissionDateID;
        this.DischargeDateID = DischargeDateID;
    }
    protected override ValidationResult IsValid(object value, ValidationContext validationContext)
    {
        object AdmissionDate = GetPropertyValue(validationContext.ObjectInstance, AdmissionDateID);
        object DischargeDate = GetPropertyValue(validationContext.ObjectInstance, DischargeDateID);
        object AdmissionType = validationContext.MemberName == null ? null : GetPropertyValue(validationContext.ObjectInstance, validationContext.MemberName);
        if (AdmissionDate != null && DischargeDate != null && AdmissionType != null)
        {
            if (AdmissionDate.Equals(DischargeDate) && DayCaseID.Equals(AdmissionType.ToString()))
            {
                return new ValidationResult(ErrorMessage, new List<String>() { validationContext.MemberName });
            }
        }
        return ValidationResult.Success;
    }
    private object GetPropertyValue(object instance,String propertyName)
    {
        Type itype = instance.GetType();
        return itype.GetProperty(propertyName).GetValue(instance,null);
    }
    public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
    {
        ModelClientValidationRule vr = new ModelClientValidationRule()
        {
            ErrorMessage = ErrorMessage,
            ValidationType = "admissiondaycase"
        };
        vr.ValidationParameters.Add(new KeyValuePair<string, object>("admissiondateid", AdmissionDateID));
        vr.ValidationParameters.Add(new KeyValuePair<string, object>("dischargedateid", DischargeDateID));
        vr.ValidationParameters.Add(new KeyValuePair<string, object>("daycaseid", DayCaseID));
        yield return vr;
    }

EDIT / UPDATE

the view is as follows:

<tr>
    <td>
        @Html.LabelFor(x => x.AdmissionTypeID)
    </td>
    <td>
        @Html.CustomDropDownListFor(a => a.AdmissionTypeID, Lookup.AdmissionTypes,Default.Constant.DROPDOWN)
        @Html.ValidationMessageFor(a=>a.AdmissionTypeID)
    </td>
</tr>

javascript -, , , - ,

Answer 1

, AdmissionDayCaseAttribute .

validationContext.MemberName return validationContext.DisplayName. DsiplayAttribute, - :

  var memberName = validationContext.ObjectType.GetProperties()
    .Where(p => p.GetCustomAttributes(false)
    .OfType<DisplayAttribute>()
    .Any(a => a.Name == validationContext.DisplayName))
    .Select(p => p.Name).FirstOrDefault(); 

    return new ValidationResult(ErrorMessage, new List<String>() { memberName  });