SaveChanges()上的验证错误 [英] Validation Error on SaveChanges()
本文介绍了SaveChanges()上的验证错误的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我在Asp.net mvc Web应用程序中具有以下Action方法:-
I have the following Action method inside my Asp.net mvc web application:-
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create(SDJoin sdj, FormCollection formValues)
{
Try
{
//code goes here
repository.InsertOrUpdateSD(sdj.StorageDevice, User.Identity.Name, assetid);
repository.Save();
}
catch (Exception ex)
{
//code goes here
}
PopulateViewBagData();
return View(sdj);
}
它将调用以下方法:-
public void InsertOrUpdateSD(TMSStorageDevice sd, string username, long assetid)
{
var resource = entities.Resources.AsNoTracking().SingleOrDefault(a => a.RESOURCEID == assetid);
if (sd.TMSStorageDeviceID == default(int))
{
// New entity
int technologyypeID = GetTechnologyTypeID("Storage Device");
Technology technology = new Technology
{
IsDeleted = true,
IsCompleted = false,
TypeID = technologyypeID,
Tag = "SD" + GetTagMaximumeNumber2(technologyypeID).ToString(),
StartDate = DateTime.Now,
IT360ID = assetid
};
InsertOrUpdateTechnology(technology);
Save();
sd.TMSStorageDeviceID = technology.TechnologyID;
tms.TMSStorageDevices.Add(sd);
}
}
我的模型课如下:-
public partial class TMSStorageDevice
{
public int TMSStorageDeviceID { get; set; }
public string Name { get; set; }
public Nullable<decimal> size { get; set; }
public int RackID { get; set; }
public string CustomerName { get; set; }
public string Comment { get; set; }
public byte[] timestamp { get; set; }
public virtual Technology Technology { get; set; }
public virtual TMSRack TMSRack { get; set; }
}
但是如果我调用Create action方法,我将得到以下异常:-
but if i call the Create action method i will get the following exception:-
System.Data.Entity.Validation.DbEntityValidationException was caught
HResult=-2146232032
Message=Validation failed for one or more entities. See 'EntityValidationErrors' property for more details.
Source=EntityFramework
StackTrace:
at System.Data.Entity.Internal.InternalContext.SaveChanges()
at System.Data.Entity.Internal.LazyInternalContext.SaveChanges()
at System.Data.Entity.DbContext.SaveChanges()
at TMS.Models.Repository.Save() in c:\Users\Administrator\Documents\Visual Studio 2012\Projects\TMS\TMS\Models\Repository.cs:line 1926
at TMS.Controllers.StorageDeviceController.Create(SDJoin sdj, FormCollection formValues) in c:\Users\Administrator\Documents\Visual Studio 2012\Projects\TMS\TMS\Controllers\StorageDeviceController.cs:line 160
InnerException:
任何人都可以建议出什么问题了,因为我仔细检查了我的代码,并且一切正常. 谢谢
Can anyone advice what is wrong, as i double check my code and every thing should work fine ? Thanks
推荐答案
您没有显示Save()
方法,但是如果您可以向其中添加这样的代码,则会得到一个包含所有详细信息的异常.重新寻找
You haven't shown the Save()
method but if you can add code like this to it you'll get an exception that contains all the details you're looking for
try
{
_context.SaveChanges();
}
catch (System.Data.Entity.Validation.DbEntityValidationException dbEx)
{
Exception raise = dbEx;
foreach (var validationErrors in dbEx.EntityValidationErrors)
{
foreach (var validationError in validationErrors.ValidationErrors)
{
string message = string.Format("{0}:{1}",
validationErrors.Entry.Entity.ToString(),
validationError.ErrorMessage);
// raise a new exception nesting
// the current instance as InnerException
raise = new InvalidOperationException(message, raise);
}
}
throw raise;
}
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