Is it possible to make model property attribute required for spesific roles in Asp.Net MVC?

Question

Is it possible to make required for only specified roles to model field on data anotation?

For Example:

[Display(Name = "Kurum")]
[Required(ErrorMessage = "Kurum Alanı Girişi Zorunludur.",Roles="user")]
public decimal? KurumKodu { get; set; }

I know there isnt parameter like Required(Roles="xxxx") , but I wonder is there any other solution about this?

Thanks.

You would have to create your own validation attribute (and implement `IClientValidatable` for client side validation) — , Oct 13 '16 at 07:47
@kodcu Please check http://stackoverflow.com/questions/7390902/requiredif-conditional-validation-attribute — kamil-mrzyglod, Oct 13 '16 at 07:49
Refer [The Complete Guide To Validation In ASP.NET MVC 3 - Part 2](http://www.devtrends.co.uk/blog/the-complete-guide-to-validation-in-asp.net-mvc-3-part-2) for a good guide to creating your own validation attributes — , Oct 13 '16 at 07:49
@kodcu Please check [Role based Authorization](https://docs.asp.net/en/latest/security/authorization/roles.html) — huse.ckr, Oct 13 '16 at 07:50

score 2 · Answer 1 · edited May 23 '17 at 12:16

You have to create custom validation attribute for this. Below code may help you to do this.

      public class RequiredIfAttribute : RequiredAttribute
        {
            private string PropertyName { get; set; }
            private object DesiredValue { get; set; }

            public RequiredIfAttribute(string propertyName, object desiredvalue)
            {
                PropertyName = propertyName;
                DesiredValue = desiredvalue;
            }

            protected override ValidationResult IsValid(object value, ValidationContext context)
            {
                object instance = context.ObjectInstance;
                Type type = instance.GetType();
                Object proprtyvalue = type.GetProperty(PropertyName).GetValue(instance, null);
                if (proprtyvalue.ToString() == DesiredValue.ToString())
                {
                    ValidationResult result = base.IsValid(value, context);
                    return result;
                }
                return ValidationResult.Success;
            }
        }

Then you have to decorate your property with this attribute (read the comments in code for understanding)

        public class User
        {
            /// <summary>
            /// Gets or Sets Usertype.
            /// </summary>
            public string UserType { get; set; }

            /// <summary>
            /// Gets or Sets KurumKodu.
            /// Here "Usertype" is property. In that you have to assign current user's role.
            /// "user" is constant role. If  "UserType" has value as "user" then this will be required.
            /// </summary>
            [RequiredIf("UserType", "user", ErrorMessage = "It is required")]
            public decimal KurumKodu { get; set; }
        }

If you want to add Client Side validation(unobtrusive) then, please see below link.

RequiredIf Conditional Validation Attribute

score 0 · Answer 2 · answered Jun 14 '17 at 12:42

0

You can use

HttpContext.Current.User.IsInRole("USER_ROLE")

in your custom validation attribute class

answered Jun 14 '17 at 12:42

Vincent Nabet

128
1
6

score -2 · Answer 3 · answered Oct 13 '16 at 19:56

-2

I tried different approaches but I came to this point that the best place to do that is on view. Something like:

 @if (User.IsInRole("SystemAdministrator"))
    {
     <td>@Html.DisplayFor(model => model.KurumKodu)</td>
    }

answered Oct 13 '16 at 19:56

Hadee

1,392
1
14
25

OP is wanting conditional validation and this has nothing to do with it (its not even generating a form control) – Oct 13 '16 at 21:44
conditional validation is for showing the property and this piece of code does exactly the same.not even generating a form control? What exactly you mean? – Hadee Oct 13 '16 at 21:50
Read the question. OP whats to make a property Required (i.e it must have a value when edited in a form) based on the role of the user (and validation has nothing to do with _showing the property_ - its for validating the the value of a property meets a condition) – Oct 13 '16 at 21:52
The question doesn't imply if it is not required for other than specific role. If the property isn't required at all for other roles, my answer works. – Hadee Oct 13 '16 at 21:58
You clearly do not understand the question.OP is applying a **validation** attribute to the property. The purpose of a validation attribute is to perform validation when editing the property in a view to ensure that it meets a condition - in this case that the value entered in the text box is **required** (cannot be `null`) if the user has a certain role (and if the user does not have that role, then it is allowed to be `null`) – Oct 13 '16 at 22:01
And you clearly don't understand my last comment above. – Hadee Oct 13 '16 at 22:07
I give up. (your answer has nothing at all to do with the question) – Oct 13 '16 at 22:09

Is it possible to make model property attribute required for spesific roles in Asp.Net MVC?

3 Answers3