C# 实体更新 Table 失败

Question

我有一个 table，它具有如下所示的复合主键。我正在尝试 add/update/delete 使用 C# MVC 的功能。添加和删除工作正常，但 EffectiveDate 列的更新失败，因为存在具有相同 ClientName 和 Portfolio 的多行。 Table结构和Entity/Service代码如下。你能看看我在代码中遗漏了什么吗？

运行时错误：

Store update, insert, or delete statement affected an unexpected number of rows (0). Entities may have been modified or deleted since entities were loaded. See http://go.microsoft.com/fwlink/?LinkId=472540 for information on understanding and handling optimistic concurrency exceptions.

 CREATE TABLE [dbo].[CustomAUM](
[Client] [varchar](80) NOT NULL,
[Portfolio] [varchar](100) NOT NULL,
[AUM] [numeric](30, 6) NOT NULL,
[EffectiveDate] [datetime] NOT NULL,
[IsStatic] [char](1) NULL,
[sysDate] [datetime] NOT NULL,
[ModifiedBy] [varchar](80) NOT NULL,
 CONSTRAINT [PK_CustomAUM] PRIMARY KEY CLUSTERED 
(
    [Portfolio] ASC,
    [Client] ASC,
    [EffectiveDate] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, FILLFACTOR = 90) ON [PRIMARY]
) ON [PRIMARY]

实体代码

public class Custom
{

    [Key]
    [Column(Order = 1)]
    public virtual string Client { get; set; }

    [Key]
    [Column(Order = 2)]
    public virtual string Portfolio { get; set; }

    [Required]
    public virtual decimal AUM { get; set; }

    [Key]
    [Column(Order = 3)]
    public DateTime EffectiveDate { get; set; }

    [StringLength(50)]
    [Column(TypeName = "char")]
    public string IsStatic { get; set; }

    [Required]
    public DateTime sysDate { get; set; }

    [StringLength(500)]
    public virtual string ModifiedBy { get; set; }

}

public class CustomerMap : EntityTypeConfiguration<Custom>
{
    public CustomerAUMMap()
    {
        //Primary Key
        this.HasKey(k => new { k.Client, k.Portfolio, k.EffectiveDate });

        this.ToTable("CustomAUM");

        this.Property(x => x.Client).HasColumnName("Client");
        this.Property(x => x.Portfolio).HasColumnName("Portfolio");
        this.Property(x => x.AUM).HasColumnName("AUM");
        this.Property(x => x.EffectiveDate).HasColumnName("EffectiveDate");
        this.Property(x => x.IsStatic).HasColumnName("IsStatic");
        this.Property(x => x.sysDate).HasColumnName("sysDate");
        this.Property(x => x.ModifiedBy).HasColumnName("ModifiedBy");
    }
}

服务方式

public void CustomAUM_Update(RiskReportDataViewModel riskReportDataViewModel, string userName)
    {
            var entity = new Custom();

            entity.Client = riskReportDataViewModel.Client;
            entity.Portfolio = riskReportDataViewModel.Portfolio;
            entity.AUM = riskReportDataViewModel.AUM;
            entity.EffectiveDate = DateTime.Parse(riskReportDataViewModel.EffectiveDate.ToShortDateString());
            entity.IsStatic = riskReportDataViewModel.IsStatic;
            entity.sysDate = DateTime.Now;
            entity.ModifiedBy = userName;

            riskContext.Custom.Attach(entity);
            riskContext.Entry(entity).State = EntityState.Modified;
            riskContext.SaveChanges();
    }

// 查看模型

public class RiskReportDataViewModel
{

    [Key]
    public virtual string Client { get; set; }

    [Key]
    [StringLength(500)]
    public virtual string Portfolio { get; set; }

    public virtual decimal AUM { get; set; }

    [Key]
    public virtual DateTime EffectiveDate { get; set; }

    public virtual String IsStatic { get; set; }

    public virtual DateTime sysDate { get; set; }

    [StringLength(500)]
    public virtual string ModifiedBy { get; set; }

}

Answer 1

我想你是用 RiskReportDataViewModel 更新的，你是用 Custom 更新的吗？告诉我更新的方法。

实际上，您需要先select从数据库中获取"Custom"，然后更改"Custom"的值并保存。

为什么自定义模型中有如下三个键？

public class Custom
{

[Key]
[Column(Order = 1)]
public virtual string Client { get; set; }

[Key]
[Column(Order = 2)]
public virtual string Portfolio { get; set; }

[Required]
public virtual decimal AUM { get; set; }

[Key]
[Column(Order = 3)]
public DateTime EffectiveDate { get; set; }

[StringLength(50)]
[Column(TypeName = "char")]
public string IsStatic { get; set; }

[Required]
public DateTime sysDate { get; set; }

[StringLength(500)]
public virtual string ModifiedBy { get; set; }

}

为键添加一个整数值。

Answer 2

解决这个问题的方法是添加一个新的Row作为ID，并做一个复合主键。感谢 Jun An 分享想法。修改后的代码如下所示 -

DB Table

CREATE TABLE [dbo].[CustomAUM](
    [ID] [int] IDENTITY(1,1) NOT NULL,
    [Client] [varchar](80) NOT NULL,
    [Portfolio] [varchar](100) NOT NULL,
    [AUM] [numeric](30, 6) NOT NULL,
    [EffectiveDate] [datetime] NOT NULL,
    [IsStatic] [char](1) NULL,
    [sysDate] [datetime] NOT NULL,
    [ModifiedBy] [varchar](80) NOT NULL,
 CONSTRAINT [PK_CustomAUM_New] PRIMARY KEY CLUSTERED 
(
    [ID] ASC,
    [Portfolio] ASC,
    [Client] ASC,
    [EffectiveDate] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, FILLFACTOR = 90) ON [PRIMARY]
) ON [PRIMARY]

Service Code

public void CustomAUM_Update(RiskReportDataViewModel riskReportDataViewModel, string userName)
        {
                var entity = new CustomAUM();

                entity = riskContext.CustomAUM.FirstOrDefault(x => x.ID == riskReportDataViewModel.ID && x.Client == riskReportDataViewModel.Client && x.Portfolio == riskReportDataViewModel.Portfolio);

                entity.Client = riskReportDataViewModel.Client;
                entity.Portfolio = riskReportDataViewModel.Portfolio;
                entity.AUM = riskReportDataViewModel.AUM;
                entity.EffectiveDate = DateTime.Parse(riskReportDataViewModel.EffectiveDate.ToShortDateString());
                entity.IsStatic = riskReportDataViewModel.IsStatic;
                entity.sysDate = DateTime.Now;
                entity.ModifiedBy = userName;

                riskContext.CustomAUM.Attach(entity);
                riskContext.Entry(entity).State = EntityState.Modified;
                riskContext.SaveChanges();
        }

C# 实体更新 Table 失败

C# Entity Update Table Failing

c#

sql

entity-framework

linq

composite-primary-key