實體框架 - 如何拯救實體，不保存相關對象

在我的實體框架，我有三個相關實體「客戶」，「ClientAddress」和「LookupAddressType」。「LookupAddressType」是一個主類指定可用地址類型的類型，如商務地址，居住地址等ClientAddress取決於LookupAddresstype和客戶。雖然正在保存 a 客戶端實體與相關的ClientAddress數據，我得到以下錯誤。實體框架 - 如何拯救實體，不保存相關對象

「PRIMARY KEY約束 'PK_LookupAddressType' 的相關規定。不能插入重複鍵對象dbo.LookupAddressType「。聲明已終止。

我不需要LookupAddressType被插入在這裏我只需要相關lookupAddressTypeId在clientAddress實體插入

保存代碼是這樣的：

Add(Client); 
_objectContext.SaveChanges();

我該怎麼做？

負載代碼如下：

private void LoadClientDetails(EFEntities.Client _Client) 
    { 

     EFEntities.LookupClientStatu clientStatus; 
     var clientAddressList = new List<ClientAddress>(); 

     if (_Client == null) 
     { 
      return; 
     } 

     //Assign data to client object 
     _Client.ClientName = rtxtName.Text; 
     _Client.Alias = rtxtAlias.Text; 
     _Client.ClientCode =Int32.Parse(rtxtClientCode.Text); 
     _Client.TaxPayerID = rtxtTaxPayerId.Text; 

     if (rcboStatus.SelectedIndex != 0) 
     { 
      clientStatus = new EFEntities.LookupClientStatu 
           { 
            ClientStatusID = (Guid) (rcboStatus.SelectedValue), 
            ClientStatusDescription = rcboStatus.Text 
           }; 
      _Client.LookupClientStatu = clientStatus; 
     } 


     //_Client.Modified = EnvironmentClass.ModifiedUserInstance.Id; 

     _Client.EffectiveDate = rdtEffectiveDate.Value; 

     if (rdtExpDate.Value != rdtExpDate.MinDate) 
     { 
      _Client.ExpirationDate = rdtExpDate.Value; 
     } 
     else 
     { 
      _Client.ExpirationDate = null; 
     } 

     _Client.StartDate = DateTime.Now; 


     EFEntities.ClientAddress clientAddress = null; 
     // Iesi.Collections.Generic.ISet<ClientAddress> clientAddress = new HashedSet<ClientAddress>(); 
     foreach (var cAddress in _clientController.client.ClientAddresses) 
     { 
      clientAddress = cAddress; 
      break; 
     } 

     if (clientAddress == null) 
     { 
      clientAddress = new EFEntities.ClientAddress(); 
     } 

     clientAddress.Address1 = rtxtClientAdd1.Text; 
     clientAddress.Address2 = rtxtClientAdd2.Text; 
     clientAddress.Address3 = rtxtClientAdd3.Text; 

     // Address type details 
     if (rcboClientAddType.SelectedIndex != -1) 
     { 
      clientAddress.LookupAddressType = new EFEntities.LookupAddressType 
              { 
               AddressTypeID = (Guid) (rcboClientAddType.SelectedValue), 
               AddressTypeDescription = rcboClientAddType.Text 
              }; 

      //clientAddress.AddressType.Id = Convert.ToByte(rcboClientAddType.SelectedValue); 
     } 


     clientAddress.City = rtxtClientCity.Text; 
     clientAddress.Client = _Client;

 _Client.ClientAddresses.Add(clientAddress); 
    }

來源

2012-07-12 jinto johnson

請告訴我們，你創建新的客戶端的代碼。 – magritte 2012-07-12 08:53:22

相關對象從哪裏來？如果他們來自數據庫，EF不應該保存它們。如果您將它們添加到客戶端但您知道密鑰，則可以嘗試使用附加（.Attach）來讓EF知道具有給定密鑰的實體在數據庫中。 – Pawel 2012-07-12 08:54:32

嗯，我這樣做是爲了下面的代碼行，使其工作。

if (rcboClientAddType.SelectedIndex != -1) 
    { 
     clientAddress.LookupAddressType = new EFEntities.LookupAddressType 
             { 
              AddressTypeID = (Guid) (rcboClientAddType.SelectedValue), 
              AddressTypeDescription = rcboClientAddType.Text 
             }; 

     //clientAddress.AddressType.Id = Convert.ToByte(rcboClientAddType.SelectedValue); 
    }

我改變了上面的代碼到這個

if (rcboClientAddType.SelectedIndex != -1) 
     { 
      //clientAddress.LookupAddressType = new EFEntities.LookupAddressType 
      //        { 
      //         AddressTypeID = (Guid) (rcboClientAddType.SelectedValue), 
      //         AddressTypeDescription = rcboClientAddType.Text 
      //        }; 
      clientAddress.AddressTypeID = (Guid)(rcboClientAddType.SelectedValue); 

     }

來源

2012-07-12 12:13:31

實體框架 - 如何拯救實體，不保存相關對象

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