Custom validation attribute for model Data annotations

Question

is there any approach in customizing data annotations just like adding [Uppercase],[Lowercase],[ProperCase] annotations in the model to convert the model in the said cases.??? i Have tried using modelbinder and it only to be set just one data annotations what i want to achieved is to have a model like this:

[Display(Name="Agent Code", Prompt =  "Agent Code")]
[CustomAttributes(Case="Uppecase", IsTrim=false)]
[Required(AllowEmptyStrings = false, ErrorMessage = ModelConstants.L_MSG_REQUIRED)]
[StringLength(10)]
public string agent_cd { get; set; }

any idea or suggestions how to achieved my desired output??

raphaelheitor · Accepted Answer · 2014-05-22 04:54:50Z

3

Has a way to do it, create your own annotation, like this:

namespace System.ComponentModel.DataAnnotations
{
    public class MakeMeUpperCase : ValidationAttribute
    {
        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
        {
            try
            {
                validationContext.ObjectType.GetProperty(validationContext.DisplayName)
                .SetValue(validationContext.ObjectInstance, value.ToString().ToUpper() , null);
            }
            catch (Exception)
            {
            }
            return null;
      }
   }
}

And your property:

[MakeMeUpperCase]
public string TurnUpper { get; set; }

answered May 22, 2014 at 4:54

raphaelheitor

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1 Comment

ECie Over a year ago

I already solved my problem. i can also convert it now into Upper proper and lower case, And also it can be trimmed thanks,,

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