Question

将数据插入数据库的问题：

例如：goods.GoodPhoto =“ / Content / img / imageGood /” + imageName; 替换为：goods.GoodPhoto =“” + imageName; 而且有效。

    [HttpPost]
    public ActionResult AddGoods(Good goods)
            {
                HttpPostedFileBase image = Request.Files["image"];
                string SavePath = Server.MapPath("~/Content/img/imageGood/");
                string imageName = DateTime.Now.ToFileTime().ToString()+image.FileName;
                image.SaveAs(Path.Combine(SavePath, imageName));
                goods.GoodPhoto = "/Content/img/imageGood/"+imageName;
                goods.ShopID = Convert.ToInt32(Session["ShopID"]);
                db.Goods.Add(goods);
                db.SaveChanges();
                return RedirectToAction("Index", "Home");
            }

一旦我编写了“ goods.GoodPhoto =“ / Content / img / imageGood /” + imageName;“，然后它失败了。错误消息是：

System.Data.Entity.Validation.DbEntityValidationException：'验证一个或多个实体失败。有关更多信息，请参见 EntityValidationErrors属性。 '

Answer 1

添加尝试捕获以查找确切的错误消息

try
  {
     db.SaveChanges();                  

   }
 catch (DbEntityValidationException e)
 {
 foreach (var valErrors in e.EntityValidationErrors)
       {
         foreach (var errors in valErrors.ValidationErrors)
          {
            //here you will get property name and error message
                Trace.TraceInformation("Property: {0} Error: {1}", 
                                errors .PropertyName, 
                                errors .ErrorMessage);
          }                  

       }
   throw;                 
  }

System.Data.Entity.Validation.DbEntityValidationException：“一个或多个实体的验证失败

1 个答案: