我正在开发一个简单的InventoryTracker MVC5应用程序，我在将LocalDatabase设置为Seed()时遇到了一些问题。
当我在下面的代码上运行update-database命令时，我在context.INV_Types.AddRange(invTypes)行上得到如下例外：
An exception of type 'System.Data.Entity.Infrastructure.DbUpdateException' occurred in EntityFramework.dll but was not handled in user code. Additional information: An error occurred while updating the entries. See the inner exception for details.
内部异常：The conversion of a datetime2 data type to a datetime data type resulted in an out-of-range value.\r\nThe statement has been terminated.
CODE ：
internal sealed class Configuration : DbMigrationsConfiguration<InventoryTracker.DAL.InventoryTrackerContext>
{
public Configuration()
{
AutomaticMigrationsEnabled = false;
}
protected override void Seed(InventoryTracker.DAL.InventoryTrackerContext context)
{
if (System.Diagnostics.Debugger.IsAttached == false)
{
System.Diagnostics.Debugger.Launch();
}
List<INV_Locations> invLocs = getLocations();
context.INV_Locations.AddRange(invLocs);
List<INV_Manufacturers> invManufacturers = getManufacturers();
context.INV_Manufacturers.AddRange(invManufacturers);
List<INV_Models> invModels = getModels();
context.INV_Models.AddRange(invModels);
List<INV_Statuses> invStatuses = getStatuses();
context.INV_Statuses.AddRange(invStatuses);
List<INV_Types> invTypes = getTypes();
context.INV_Types.AddRange(invTypes); // EXCEPTION?
List<INV_Vendors> invVendors = getVendors();
context.INV_Vendors.AddRange(invVendors);
context.SaveChanges(); // Was told I needed to Save the other seeds before the Assets to ensure primary keys are created in the other tables?
List<INV_Assets> invAssets = getAssets();
context.INV_Assets.AddRange(invAssets);
context.SaveChanges();
}
private List<INV_Types> getTypes()
{
List<INV_Types> testTypes = new List<INV_Types>
{
new INV_Types
{
Id = 1,
type_description = "Server",
created_by = "Admin",
created_date = DateTime.Now
},
new INV_Types
{
Id = 2,
type_description = "IP Phone",
created_by = "Admin",
created_date = DateTime.Now
},
new INV_Types
{
Id = 3,
type_description = "Monitor",
created_by = "Admin",
created_date = DateTime.Now
}
};
return testTypes;
}
private List<INV_Assets> getAssets()
{
List<INV_Assets> testAssets = new List<INV_Assets>
{
new INV_Assets
{
Id = 1,
ip_address = "10.10.135.38",
mac_address = "10.10.177.44",
note = "",
owner = "John Smith",
cost = 35,
po_number = "G348",
invoice_number = 1447,
serial_number = "JX14582Y",
asset_tag_number = "293548195023",
//acquired_date = Convert.ToDateTime(10212014),
acquired_date = DateTime.ParseExact("10212014", "MMddyyyy", CultureInfo.InvariantCulture),
disposed_date = null,
created_by = "Admin",
created_date = DateTime.Now,
Location_Id = 1,
Manufacturer_Id = 1,
Model_Id = 1,
Status_Id = 2,
Type_Id = 3,
Vendor_Id = 3
}
};
return testAssets;
}
是否有人对Seed() INV_Types getTYpes()的结构中可能导致此问题的人有任何想法？
我认为可能需要在context.SaveChanges()之前将更改保存到上下文中，但在.AddRange(invStatuses)之后添加context.SaveChanges()只会导致相同的错误新的 #region Seed Locations
private List<INV_Locations> getLocations()
{
List<INV_Locations> testLocations = new List<INV_Locations>
{
new INV_Locations
{
Id = 1,
location_dept = "IT",
location_room = "Server",
created_by = "Admin",
created_date = DateTime.Now
},
new INV_Locations
{
Id = 2,
location_dept = "Break Room",
location_room = "Kitchen",
created_by = "Admin",
created_date = DateTime.Now
},
new INV_Locations
{
Id = 3,
location_dept = "Accounting",
location_room = "Conference",
created_by = "Admin",
created_date = DateTime.Now
}
};
return testLocations;
}
#endregion
#region Seed Manufacturers
private List<INV_Manufacturers> getManufacturers()
{
List<INV_Manufacturers> testManufacturers = new List<INV_Manufacturers>
{
new INV_Manufacturers
{
Id = 1,
manufacturer_description = "Samsung",
created_by = "Admin",
created_date = DateTime.Now
},
new INV_Manufacturers
{
Id = 2,
manufacturer_description = "MITEL",
created_by = "Admin",
created_date = DateTime.Now
},
new INV_Manufacturers
{
Id = 3,
manufacturer_description = "Oracle",
created_by = "Admin",
created_date = DateTime.Now
}
};
return testManufacturers;
}
#endregion
#region Seed Models
private List<INV_Models> getModels()
{
List<INV_Models> testModels = new List<INV_Models>
{
new INV_Models
{
Id = 1,
model_description = "XTERAV12",
created_by = "Admin",
created_date = DateTime.Now
},
new INV_Models
{
Id = 2,
model_description = "5330",
created_by = "Admin",
created_date = DateTime.Now
},
new INV_Models
{
Id = 3,
model_description = "Sunblade 6000",
created_by = "Admin",
created_date = DateTime.Now
}
};
return testModels;
}
#endregion
#region Seed Statuses
private List<INV_Statuses> getStatuses()
{
List<INV_Statuses> testStatuses = new List<INV_Statuses>
{
new INV_Statuses
{
Id = 1,
status_description = "AVAILABLE",
created_by = "Admin",
created_date = DateTime.Now
},
new INV_Statuses
{
Id = 2,
status_description = "SIGNEDOUT",
created_by = "Admin",
created_date = DateTime.Now
},
new INV_Statuses
{
Id = 3,
status_description = "RECYCLED",
created_by = "Admin",
created_date = DateTime.Now
},
new INV_Statuses
{
Id = 4,
status_description = "AUCTIONED",
created_by = "Admin",
created_date = DateTime.Now
}
};
return testStatuses;
}
#endregion
#region Seed Types
private List<INV_Types> getTypes()
{
List<INV_Types> testTypes = new List<INV_Types>
{
new INV_Types
{
Id = 1,
type_description = "Server",
created_by = "Admin",
created_date = DateTime.Now
},
new INV_Types
{
Id = 2,
type_description = "IP Phone",
created_by = "Admin",
created_date = DateTime.Now
},
new INV_Types
{
Id = 3,
type_description = "Monitor",
created_by = "Admin",
created_date = DateTime.Now
}
};
return testTypes;
}
#endregion
#region Seed Vendors
private List<INV_Vendors> getVendors()
{
List<INV_Vendors> testVendors = new List<INV_Vendors>
{
new INV_Vendors
{
Id = 1,
vendor_name = "Oracle",
created_by = "Admin",
created_date = DateTime.Now
},
new INV_Vendors
{
Id = 2,
vendor_name = "Centriq",
created_by = "Admin",
created_date = DateTime.Now
},
new INV_Vendors
{
Id = 3,
vendor_name = "Samsung",
created_by = "Admin",
created_date = DateTime.Now
}
};
return testVendors;
}
#endregion
??
如果有人看到我忽视的东西，我已经在下面提供了我的其他种子方法来帮助我们：
Id修改
正如IronMan84指出的那样，我错误地将其复制粘贴到我拥有相同 context.INV_Vendors.AddRange(invVendors);
context.SaveChanges(); // DbUpdateException!
List<INV_Assets> invAssets = getAssets();
值的每个实体的几个实例的位置（例如，1,2,1而不是1,2， 3）。但是，错误仍然存在，除非现在在以下行：
The conversion of a datetime2 data type to a datetime data type resulted in an out-of-range value.\r\nThe statement has been terminated EDIT2 ：在最初列出的错误中添加了内部异常详细信息。 context.SaveChanges()。
EDIT3 ：为了更好地诊断问题，我尝试在每次.AddRange()次调用后添加context.INV_Locations.AddRange(invLocs)，但An exception of type 'System.Data.Entity.Infrastructure.DbUpdateException' occurred in EntityFramework.dll but was not handled in user code. Additional information: An error occurred while updating the entries. See the inner exception for details.之后的第一个实例会导致同样的错误：
The conversion of a datetime2 data type to a datetime data type resulted in an out-of-range value.\r\nThe statement has been terminated.
内部异常：getLocations()
我只能想象这是引用我的[created_date]将DateTime.Now值设为 [Required]
[DisplayFormat(DataFormatString = "{0:MM/dd/yyyy}")]
public DateTime created_date { get; set; }
，但我不确定问题是什么？
在我的模型中，我将属性定义为：
{{1}}
答案 0 :(得分：2)
getTypes()方法中的2个类型的Id值为1. EF不喜欢该冲突，因此会爆炸。
编辑：您在评论中提到的错误（The conversion of a datetime2 data type to a datetime data type resulted in an out-of-range value.\r\nThe statement has been terminated.）仅由具有DateTime属性的对象引起，该属性的当前值设置为1753年1月1日之前的日期（最有可能的是它设置为DateTime.MinValue，即1/1/0001）。
是什么导致EF将C＃的DateTime类型映射到SQL的datetime类型（而不是datetime2，这可以回到1/1/0001），这有上述最低日期要求。当您尝试在 1/1/1753之前保存日期为的对象时，SQL认为您尝试将datetime2保存在datetime类型的列中并炸毁。
解决方案是调试它并确定哪些记录具有仍设置为错误日期的属性（如DateTime.MinValue）并调整代码以相应地编辑这些属性。