将数据表中的数据放入图表时出现此错误

Question

cs1503 argument 1 cannot convert from 'system.collections.generic.list <<annonymous type:string CustomerEmail,string Count>>' to "System.Collections.GenericList<Coursework.Customer>

Answer 1

You must map the data in the two tables together. For example, you have a product table and the product has a name and price. And you want to turn the product into a car table and the car has a name and a price. Therefore, you assign the name and price of the product to the name and price of the car table.

public class Product
{
  public string ProductName { get; set; }
  public string Price { get; set; }
}
public class Car
{
  public string CarName { get; set; }
  public string Price { get; set; }
}

List<Product> products = new List<Product>()
{
  new Product(){ProductName = "Car1", Price = "1,000,000"},
  new Product(){ProductName = "Car2", Price = "1,000,000"},
  new Product(){ProductName = "Car3", Price = "1,000,000"},
};


List<Car> cars = new List<Car>();
foreach (var item in products)
{
   Car car = new Car();
   car.CarName = item.ProductName;
   car.Price = item.Price;
   cars.Add(car);
}

//You can now use this list...