The Problem
You have created a lovely model in asp.net mvc 4, using Entity Framework and a whole host of attributes. One of the properties of your model looks like this
[Required]
[Display(Name = “Expiration Month (MM)”)]
[StringLength(2,ErrorMessage = “You must enter two digits”, MinimumLength = 1)]
[Range(1,12, ErrorMessage = “You must enter a valid month”)]
public int ExpirationMonth { get; set; }
That yields an error of
Unable to cast object of type ‘System.Int32’ to type ‘System.String
When the form is submitted, but not when the object is created (which is a bit odd)
The Cause
It turns out that you cannot use the StringLength data attribute on an int data type. You would think you could since all you are actually interested in with that data attribute is the number of digits, but the data gods have decreed that you can’t.
The Solution
Just comment out StringLength and use the Range Attribute.
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Written By Steve French |
Thanq Very much…
THANK YOU!