Return column based on record in FK table

Question

I have a success query for displaying Vendors, but what I wanted to add now is a column showing which vendors have been selected or not (displayed as a checkbox column). These selections are stored in VendorsSelected table that contains the FK ProfileID and UserName that selected them. So when the current user views the Vendors there will be matches for some Vendors and not for others.

How do I modify the query? Note the Where clause below will accomplish getting only vendors that the current user has selected, but what I want is all vendors displayed with true/false (checkbox) column for each vendor they have selected.

public IEnumerable<BrowseVendorModel> BrowseVendors()
{
    IQueryable<BrowseVendorModel> viewModel = _db.VendorProfiles
        .Include("VendorsSelected")
        .Select(s => new BrowseVendorModel
        {
            ProfileID = s.ProfileID,
            Name = s.Name,
            CompanyName = s.CompanyName,
            City = s.City,
            State = s.State,
            DateCreated = s.DateCreated
        })
        .Where(x => x.VendorsSelected.Select(s => s.UserName).Contains(HttpContext.Current.User.Identity.Name))
        .OrderBy(v => v.ProfileID);

    return viewModel;
}

Answer 1

Add a property Selected (boolean) to the view model:

public IEnumerable<BrowseVendorModel> BrowseVendors()
{
    IQueryable<BrowseVendorModel> viewModel = _db.VendorProfiles
        .Include("VendorsSelected")
        .Select(s => new BrowseVendorModel
        {
            ProfileID = s.ProfileID,
            Name = s.Name,
            CompanyName = s.CompanyName,
            City = s.City,
            State = s.State,
            DateCreated = s.DateCreated,
            Selected = x.VendorsSelected.Select(s => s.UserName)
                        .Contains(HttpContext.Current.User.Identity.Name)
        })
        .OrderBy(v => v.ProfileID);

    return viewModel;
}