Question

我使用以下设计：

System architecture

我使用AutoMapper进行域/ DTO转换（双向），实体框架代码优先和SQL Server 2012.

每个表都有一个名为RowVersion的{{1}}类型字段，以便检查更新。

我正在使用DTO层，因为我的域对象无法在WCF服务中序列化，并且我的域层中有一个循环。

无论如何，我的问题是，当创建一个timestamp（一个在UI中有一个页面的表）时，我将值（BankCode，BankName）复制到Bank并在我的服务层中转换使用AutoMapper BankDTO到BankDTO（BankDomain的实体域对象），然后调用Bank。

有效，我也可以更新银行。

但是当我编辑一个SaveChange和一个银行分行时，请将Bank转换为BankDTO并致电BankDomain，但这不起作用。如果我在没有 AutoMapper的情况下将SaveChange映射到BankDTO ，则可以正常运行并执行更新。

我的BankDomain看起来像这样：

BankDTO

[Serializable] public class BankModel { public BankModel() { this.BankBranches = new List<BankBranchModel>(); } public int? Id { get; set; } public byte[] RowVersion { get; set; } public decimal BankCode { get; set; } public string BankName { get; set; } public string LatinCode { get; set; } public virtual ICollection<BankBranchModel> BankBranches { get; set; } } DTO：

BankBranch

[Serializable] public class BankBranchModel { public BankBranchModel() { } public int BankId { get; set; } public decimal BranchCode { get; set; } public string BranchName { get; set; } public int? ExecutiveUnitId { get; set; } public int? Id { get; set; } public byte[] RowVersion { get; set; } public BankModel Bank { get; set; } }：

BankDomain

public class Bank : BaseEntity { public Bank() { this.BankBranches = new List<BankBranch>(); } public decimal BankCode { get; set; } public string BankName { get; set; } public string LatinCode { get; set; } public virtual ICollection<BankBranch> BankBranches { get; set; } }：

BankBranchDomain

SQL表的创建方式如下：

public class BankBranch : BaseEntity { public BankBranch() { } public int BankId { get; set; } public decimal BranchCode { get; set; } public string BranchName { get; set; } public virtual Bank Bank { get; set; } }

更新代码：

CREATE TABLE [global].[Bank]( [Id] [int] NOT NULL, [RowVersion] [timestamp] NOT NULL, [BankCode] [numeric](18, 0) NOT NULL, [BankName] [varchar](20) NOT NULL, [LatinCode] [varchar](3) NOT NULL, CONSTRAINT [PKBnk] PRIMARY KEY CLUSTERED ( [Id] ASC ) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] CREATE TABLE [global].[BankBranch]( [Id] [int] NOT NULL, [RowVersion] [timestamp] NOT NULL, [BranchCode] [numeric](18, 0) NOT NULL, [BranchName] [varchar](100) NOT NULL, [BankId] [int] NOT NULL, [ExecutiveUnitId] [int] NULL, CONSTRAINT [PK_BankBranch] PRIMARY KEY CLUSTERED ( [Id] ASC ) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY]

更改UI层中的using (var db = new AndishmandTestContext()) { Mapper.CreateMap<BankModel, Bank>(); Mapper.CreateMap<Bank, BankModel>(); Mapper.CreateMap<BankBranchModel, BankBranch>(); Mapper.CreateMap<BankBranch, BankBranchModel>(); var oldb = db.Banks.Include("BankBranches").Where(b => b.Id == 1); Bank bank = oldb.FirstOrDefault(); BankModel bankmodel = new BankModel(); Mapper.Map(bank, bankmodel); }后，此代码将在服务层中执行：

BankModel

然后，更改将保存在业务层中：

var Newb = db.Banks.Include("BankBranches").Where(b => b.Id == 1); Bank newbank = Newb.FirstOrDefault(); Mapper.Map(bankmodel, newbank);

如果我在db.SaveChanges();和BankDto中映射BankBranchDto和BankDomain而不是使用BankBranchDomain，那么Mapper.Map有效 - 但我必须使用AutoMapper。

Answer 1

您需要先添加已更改的对象或值，然后保存更改。

  db.Banks.AddObject(---your object name or value which you want to add---);
   db.SaveChanges();

Answer 2

我找到了答案。我改变了我的地图并且它已经开始了

像这样

            Mapper.CreateMap<BankModel, Bank>().ForMember(x => x.BankBranches, opt => opt.Ignore());
            //Mapper.CreateMap<BankModel, Bank>();
            Mapper.CreateMap<Bank, BankModel>();

            Mapper.CreateMap<BankBranchModel, BankBranch>().ForMember(x => x.Bank, opt => opt.Ignore());
            //Mapper.CreateMap<BankBranchModel, BankBranch>();
            Mapper.CreateMap<BankBranch, BankBranchModel>();

然后我大多数修改我的域名

              //update bankdomain
            Mapper.Map(bankmodel, newbank);

            //Update bank branchdomain
            newbank.BankBranches.ToList().ForEach(bb => Mapper.Map(bankmodel.BankBranches.First(c => c.Id == bb.Id), bb));

            //Delete branchdomain
            foreach (var bBmodel in bankmodel.BankBranches.Where(bB => bB.IsDeleted == true))
            {
                newbank.BankBranches.Remove(newbank.BankBranches.Where(bb => bb.Id == bBmodel.Id).First());
            }

            //Add branchdomain
            foreach (var bBM in bankmodel.BankBranches.Where(c => c.Id == null))
            {
                newbank.BankBranches.Add(Mapper.Map<BankBranch>(bBM));
            }

然后

db.SaveChanges();

实体框架无法保存我的更改

2 个答案: