相关疑难解决方法(0)

我收到此错误:

Validation failed for one or more entities. See 'EntityValidationErrors' property for more details.

当我尝试使用Update-Database程序包管理器控制台中的命令更新数据库时.

如何在visual studio中将行写入输出窗口？

我试过了:

try
{
    context.SaveChanges();
}
catch (System.Data.Entity.Validation.DbEntityValidationException e)
{
    foreach (var eve in e.EntityValidationErrors)
    {
        System.Diagnostics.Debug.WriteLine("Entity of type \"{0}\" in state \"{1}\" has the following validation errors:",
            eve.Entry.Entity.GetType().Name, eve.Entry.State);
        foreach (var ve in eve.ValidationErrors)
        {
            System.Diagnostics.Debug.WriteLine("- Property: \"{0}\", Error: \"{1}\"",
                ve.PropertyName, ve.ErrorMessage);
        }
    }
    throw;
}

但那没用.关于如何调试这个的任何其他建议？