Export to Excel using ViewModel and Repository - ASP.NET MVC

Question

I have this model

 and ViewModel

 I want to export to Excel using ViewModel and Repository. Initially, I have used my Model Class and Repository, and it was working fine. But I want to change it to ViewModel and Repository. 

From the attached code, ExcelCode1 is the initial code I used that worked. How do I perform it using ViewModel.

 

How do I include ViewModel.

 

I tried to create a service as shown below and call from the controller, but dont know how to go about it.

 

 

 

ViewModel

public class CountriesViewModel

{

[HiddenInput]

public int COUNTRY_ID { get; set; }

[Required(ErrorMessage = "Country Code is required")]

[Display(Name = "Country Code")]

[StringLength(2, ErrorMessage = "The {0} must be at least {1} characters long. Plese check again!", MinimumLength = 2)]

public string COUNTRY_CODE { get; set; }

[Required(ErrorMessage = "Country Name is required")]

[Display(Name = "Country Name")]

[StringLength(100, ErrorMessage = "The {0} must be at least {1} characters long. Plese check again!", MinimumLength = 2)]

public string COUNTRY_NAME { get; set; }

}