Dataannotation validate for numeric values only

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I am using DAValidation in my asp.net application, I have to apply Numeric validation on contact number, also on the length on contact number which should be minimum 11 digits.
This is how I am applying annotation

C#

[StringLength(20, MinimumLength = 11, ErrorMessage = "Contact number should have minimum 11 digits")]
        [Range(0, Int64.MaxValue, ErrorMessage = "Contact number should not contain characters")]
        public string CONTACT_NUMBER
        {
            get { return m_CONTACT_NUMBER; }
            set
            {
                m_CONTACT_NUMBER=value;
            }
        }

It is working fine,but the problem I am facing is that if I enter abc in contact number field,it will check for length first(ie it gives error message (Contact number should have minimum 11 digits)), However it should validate the datatype incase of non numeric input.
How can I fix this?

What I have tried:

C#

[StringLength(20, MinimumLength = 11, ErrorMessage = "Contact number should have minimum 11 digits")]
        [Range(0, Int64.MaxValue, ErrorMessage = "Contact number should not contain characters")],/pre>

Posted 10-May-16 21:22pm

Syed Salman Raza Zaidi

Updated 11-May-16 3:53am

Santosh Kokatnur

v3

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Kunwar Bahadur Singh · Answer 1 · 2016-05-11T03:38:00

Add code as below

C#

[DataType(DataType.PhoneNumber)]
    [Display(Name = "CONTACT_NUMBER ")]
    [Required(ErrorMessage = "CONTACT_NUMBER Required!")]
    [RegularExpression(@"^\(?([0-9]{3})\)?[-. ]?([0-9]{3})[-. ]?([0-9]{4})$", ErrorMessage = "Entered CONTACT_NUMBER format is not valid.")]
    public string CONTACT_NUMBER { get; set; }

Karthik_Mahalingam · Answer 2 · 2016-05-11T03:53:00

Solution 2

Place the Range Attribute at top

C#

[Range(0, Int64.MaxValue, ErrorMessage = "Contact number should not contain characters")]
       [StringLength(20, MinimumLength = 11, ErrorMessage = "Contact number should have minimum 11 digits")]
       public string CONTACT_NUMBER
       {

Posted 11-May-16 3:53am

Karthik_Mahalingam