Convert SelectList to List<T>

Sanhita Roy 1

Can you please show how do I convert SelectList items to generic list

ViewModel

public SelectList Countries { get; set; }

Model

public List<EmissionCountry> Countries { get; set; } = new List<EmissionCountry>();


I want to convert all the select list items into the list

 public static Emission MapUserDetailViewModel(UserDetailViewModel viewModel)         
{             
return new Emission             
{                 
Countries = viewModel.Countries,                 
MarketSegments = viewModel.MarketSegments,                 
InquiryTypes = viewModel.InquiryTypes             
};         
}

I am getting error cannot implicitly convert type system.web.mvc.selectlist to system.collections.generic.list<EmeaWebsite.Model.EmissionCountry>

Hui Liu-MSFT 47,341 Microsoft Vendor

Hi,@Sanhita Roy. Welcome to Microsoft Q&A. Not sure what exactly your code is? You could try to refer to the code below. If you still have problems, please show me a minimal example that can reproduce the problem with code to analyze.

You could extract the EmissionCountry objects from the SelectList and create a new List<EmissionCountry> from them.

In the code, you can create a new List<EmissionCountry> called selectedCountries and iterate through the items in the SelectList . If an item is selected, you could cast its value to EmissionCountry and add it to the list. Finally, you can assign the list of selected countries to the Countries property in the Emission object.

 public static Emission MapUserDetailViewModel(UserDetailViewModel viewModel)
        {
            // Create a list to store the selected countries
            List<EmissionCountry> selectedCountries = new List<EmissionCountry>();

            // Check if viewModel.Countries is not null
            if (viewModel.Countries != null)
            {
                // Iterate through the SelectList items
                foreach (var item in viewModel.Countries)
                {
                    // Check if the item is selected
                    if (item.Selected)
                    {
                        // Extract the value (EmissionCountry) from the item and add it to the list
                        selectedCountries.Add((EmissionCountry)item.Value);
                    }
                }
            }

            return new Emission
            {
                // Assign the list of selected countries to the Countries property
                Countries = selectedCountries,
                MarketSegments = viewModel.MarketSegments,
                InquiryTypes = viewModel.InquiryTypes
            };
        }

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Convert SelectList to List<T>