C＃从属性检索字段名称

Question

I am facing the issue of validating a property whose validation properties are associated with the corresponding field name.

int _myIntField;
public int MyIntField {
    get { return _myIntField; }
    set { _myIntField = value; }
}

Now, when validating a Binding Object, I have access to the BindingField , which returns the property name MyIntField , not the field name _myIntField .

Is it possible to somehow retrieve _myIntField for the property? If so, how?

Answer 1

Actually, for my case, I have a work-around: I created a custom attribute taking the associated field name as a parameter...

int _myIntField;
[MyAttribue("_myIntField")] 
public int MyIntField {
    get { return _myIntField; }
    set { _myIntField = value; }
}

For the sake of completeness, here is the attribute's declaration:

public class MyAttribue : ValidationAttribute {
    protected readonly string _fieldName;

    public MyAttribue(string fldName) {
      _fieldName = fldName;
    }

    protected override ValidationResult IsValid(object value, ValidationContext validationContext) {
      if (validationContext == null) {
        return ValidationResult.Success;
      }
      ErrorMessage = string.Empty;

      if (validationContext.ObjectInstance != null) {
        // do whathever validation is required using _fieldName...
      }
      //
      if (!string.IsNullOrWhiteSpace(ErrorMessage)) {
        return new ValidationResult(ErrorMessage);
      }
      return ValidationResult.Success;
    }
  }