EF异常：字符串或二进制数据将被截断。声明已经终止。

问题描述

我读过很多与这个问题有关的帖子，但找不到答案。
我试图将大量数据从Excel加载到SQL Server。
成千上万的记录。我收到这个例外：

显然，某些值超出了数据库中的字段大小。
错误来自SQL Server AFIK。

---

我的问题 - 我怎么可能知道什么记录和什么字段值导致这个？

EF异常没有具体的细节，除了我提到的。

任何帮助都不胜感激。

有些人要求代码片段，但实际上很简单，问题不在于代码： p>

  // employees是一个List< Employee>使用（var context = new Entities（））从Excel 
加载的集合
 {
 employees.ForEach（e => context.Employee.AddObject（e））; 
 context.SaveChanges（）; 
} 
  

另外建议使用 DbEntityValidationException 仅在Entity Framework 5.0中可用）不起作用， catch 块没有捕获异常。

  try 
 {
 ImportData（）; 
} 
 catch（DbEntityValidationException ex）
 {
 foreach（ex.EntityValidationErrors中的var item）
 {
 // ... 
 } 
} 
  

到目前为止，我发现唯一的解决方案是使用SQL Server Profiler，并定义以下事件来监视：

$ b

现在我可以看到电子邮件太长了。 div>

  catch（DbEntityValidationException ex）
 {
 foreach（exeEntityValidationErrors中的var item）
 {
 // ..在这里检查
} 
} 
  

你可以找到你需要的信息foreach循环。

希望有所帮助。

I have read many posts related to this issue, but couldn't find an answer.I am trying to load a large amount of data from Excel into SQL Server.Thousands of records. And I am getting this exception:

Obviously some values exceed the field size in the database.The error comes from SQL Server AFIK.

---

My question - How could I possibly know what record and what field value caused this?

There are no specific details in EF exception, except the one I mentioned.

Any help is appreciated.

Some asked for the code fragment, but it's actually very simple, the problem is not with the code:

// employees is a List<Employee> collection loaded from Excel
using (var context = new Entities())
{
    employees.ForEach(e => context.Employee.AddObject(e));
    context.SaveChanges();
}

Also the suggested approach to use DbEntityValidationException (which is only available in Entity Framework 5.0) is not working, the catch block didn't catch the exception.

try
{
    ImportData();
}
catch (DbEntityValidationException ex)
{
    foreach (var item in ex.EntityValidationErrors)
    {
        //...
    }
}

The only solution that I found so far is to use SQL Server Profiler, and define the following events to monitor:

Now I can see the Email is too long.

解决方案

catch (DbEntityValidationException ex)
{
    foreach (var item in ex.EntityValidationErrors)
    {
        //... inspect here
    }
}

You can find the information you need inside foreach loop.

Hope that helps.

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