在Asp.net Core中使用EF Core进行内连接和将数据传递给视图模型的示例代码如下所示：

1. 创建数据库上下文类

public class ApplicationDbContext : DbContext
{
    public ApplicationDbContext(DbContextOptions options) : base(options)
    {
    }

    public DbSet Customers { get; set; }
    public DbSet Orders { get; set; }
}

2. 创建实体类

public class Customer
{
    public int Id { get; set; }
    public string Name { get; set; }
    public ICollection Orders { get; set; }
}

public class Order
{
    public int Id { get; set; }
    public string ProductName { get; set; }
    public int CustomerId { get; set; }
    public Customer Customer { get; set; }
}

3. 创建视图模型类

public class CustomerViewModel
{
    public int Id { get; set; }
    public string Name { get; set; }
    public List OrderProducts { get; set; }
}

4. 在Controller中进行内连接查询和将数据传递给视图模型

public class CustomerController : Controller
{
    private readonly ApplicationDbContext _context;

    public CustomerController(ApplicationDbContext context)
    {
        _context = context;
    }

    public IActionResult Index()
    {
        var customers = _context.Customers
            .Include(c => c.Orders)
            .Select(c => new CustomerViewModel
            {
                Id = c.Id,
                Name = c.Name,
                OrderProducts = c.Orders.Select(o => o.ProductName).ToList()
            })
            .ToList();

        return View(customers);
    }
}

5. 在视图中显示数据

@model List

@foreach (var customer in Model)
{
    
@customer.Name
    

        @foreach (var product in customer.OrderProducts)
        {
            
@product
        }
    
}

以上代码示例演示了如何在Asp.net Core中使用EF Core进行内连接查询，并将查询结果传递给视图模型进行显示。