其中一个主键值的类型与实体中定义的类型不匹配.请参阅内部异常了解详细信

Question

我有以下方法: -

public ActionResult CustomersDetails(string[] SelectRight)
{
    var selectedCustomers = new SelectedCustomers
    {
        Info = SelectRight.Select(GetAccount)
    };

    return View(selectedCustomers);
}

private AccountDefinition GetAccount(string id)
{
    return entities.AccountDefinition.Find(id);
}

但它返回以下错误: -

The type of one of the primary key values did not match the type defined in the entity. See inner exception for details.

就return entities.AccountDefinition.Find(id);行了

那是什么导致了这个错误？

内在的例外是: -

System.ArgumentException was unhandled by user code
  HResult=-2147024809
  Message=The type of one of the primary key values did not match the type defined in the entity. See inner exception for details.
Parameter name: keyValues
  Source=EntityFramework
  ParamName=keyValues
  StackTrace:
       at System.Data.Entity.Internal.Linq.InternalSet`1.FindInStore(WrappedEntityKey key, String keyValuesParamName)
       at System.Data.Entity.Internal.Linq.InternalSet`1.Find(Object[] keyValues)
       at System.Data.Entity.DbSet`1.Find(Object[] keyValues)

  InnerException: System.Data.EntitySqlException
       HResult=-2146232006
       Message=The argument types 'Edm.Int64' and 'Edm.String' are incompatible for this operation. Near WHERE predicate, line 1, column 90.
       Source=System.Data.Entity
       Column=90
       ErrorContext=WHERE predicate, line 1, column 90
       ErrorDescription=The argument types 'Edm.Int64' and 'Edm.String' are incompatible for this operation.
       Line=1

Answer 1

查看异常消息The argument types 'Edm.Int64' and 'Edm.String' are incompatible for this operation. Near WHERE predicate, line 1, column 90..

这意味着ID您的AccountDefinition类是long或者Int64您尝试使用a查询它string.

您需要执行以下操作之一:

1. 更改string[]在CustomersDetails(string[] SelectRight)以long[]和string在GetAccount(string id)以long id
2. 更改return entities.AccountDefinition.Find(id);到return entities.AccountDefinition.Find(long.Parse(id));

选项1是更好的选择,但需要更多更改(我建议你这样做),选项2更改较少,但如果id为null或无法解析为a的值,则可能会爆炸long.