[英]The type or namespace name 'Exchange' does not exist in the namespace
[英]type or namespace name does not exist in the namespace
我在 .cs 文件中有下面的代碼,我遇到了下面的錯誤,任何幫助將不勝感激。
using System.Data.Entity;
namespace Assignment2.Models
{
public class TicketBookingEntities : DbContext
{
public DbSet<Performance> Performances { get; set; }
public DbSet<Production> Productions { get; set; }
}
}
錯誤:
Error 1 The type or namespace name 'Entity' does not exist in the namespace 'System.Data' (are you missing an assembly reference?)
Error 2 The type or namespace name 'DbContext' could not be found (are you missing a using directive or an assembly reference?)
Error 3 The type or namespace name 'DbSet' could not be found (are you missing a using directive or an assembly reference?)
Error 4 The type or namespace name 'DbSet' could not be found (are you missing a using directive or an assembly reference?)
確保您的項目包含對EntityFramework.dll的引用。
如果您不知道如何添加引用,請參閱此鏈接中的主題在 Visual C#中添加引用。
嘗試在對象瀏覽器中查找您丟失的引用。
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