小编Fre*_*cke的帖子

我有一个表OrderDetails与以下架构:

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|  OrderId  |  CopyCost  |  FullPrice  |  Price  |  PriceType  |
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|  16       |  50        |  100        |  50     |  CopyCost   |
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|  16       |  50        |  100        |  100    |  FullPrice  |
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|  16       |  50        |  100        |  50     |  CopyCost   |
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|  16       |  50        |  100        |  50     |  CopyCost   |
----------------------------------------------------------------

我需要一个查询,将上面的表推测为具有以下模式的新表:

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|  OrderId  |  ItemCount  |  TotalCopyCost  |  TotalFullPrice  |
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|  16       |  4          |  150 …

我仍然在使用EF.我在我的项目中使用代码优先方法并偶然发现了以下问题.

我有以下对象:

public class Employee
{
    public int EmployeeId { get; set; }
    public int BusinessUnitId { get; set; }

    public virtual BusinessUnit BusinessUnit { get; set; }
}

public class Quote
{
    public int QuoteId { get; set; }

    [DisplayName("Business Unit")]
    public int BusinessUnitId { get; set; }

    [DisplayName("Responsible Employee")]
    public int EmployeeId { get; set; }

    [DisplayName("Date Issued")]
    [DataType(DataType.Date)]
    public DateTime DateIssued { get; set; }

    [DataType(DataType.MultilineText)]
    public string Description { get; set; }

    public virtual Employee Employee …