Question

I have a model class :

public class YearlyChageRate
{
    public int Year { get; set; }
    public double Rate { get; set; }
}

and I want to check that Yeae is unique or no and in condition Year is not unique application show an error message to users.How can I check the Year filed is repeated or not?

Answer 1

Here is a good example:
http://tugberkugurlu.com/archive/asp-net-mvc-remote-validation-for-multiple-fields-with-additionalfields-property

And here too: MVC validation for unique

You can use Remote attribute in your model to perform check for unique value in database.

This is official example of Remote attribute: http://msdn.microsoft.com/en-us/library/gg508808(v=vs.98).aspx

And one more: http://www.a2zdotnet.com/View.aspx?Id=198