使用 Linq-to-SQL 插入有时会失败答案

【问题标题】：Insert with Linq-to-SQL sometimes fails使用 Linq-to-SQL 插入有时会失败
【发布时间】：2012-03-05 10:25:07
【问题描述】：

我有一个项目，将个人信息插入到一个表中，并将详细信息插入到另一个表中。但有时无法记录个人信息，但会记录详细信息。如下代码部分，首先插入个人信息，然后是详细信息。但有时个人信息没有被保存，userId 返回 0，所以细节被保存了。我不知道为什么它不起作用。有什么想法吗？

 public int ConferenceIdyeGoreKisiBilgileriniKaydet(string orderId)
 {
        KisiselBilgilerBal kisiBilgileri = (KisiselBilgilerBal)Session["kisiselBilgilerSession"];
        registrationCode = GenerateGeristrationCode();
        string toplamMaliyet = Session["toplamOdeme"].ToString();
        PersonalInformation.SavePersonalInformations(kisiBilgileri,  registrationCode,conferenceName);
        int userId = AuthorPaperDetaylari.AdVeSoyadaGoreIdGetir(kisiBilgileri.f_name, kisiBilgileri.l_name);
        AuthorPaperDetaylari.SaveAuthorPaperDetails(authorPaperDetay, userId); // save details via userId.

        return userId;
    }

此方法保存个人信息。

public static void SavePersonalInformations(KisiselBilgilerBal kisiBilgileri,string  registrationCode,string conferenceName)
{
        try
        {
            string cs = ConfigurationManager.AppSettings["SiteSqlServer"];
            DBDataContext db = new DBDataContext(cs);
            DBpersonalInformation personalInfo = new DBpersonalInformation();
            personalInfo.f_name = kisiBilgileri.f_name;
            personalInfo.l_name = kisiBilgileri.l_name;
            personalInfo.university_affiliation = kisiBilgileri.university_affiliation;
            personalInfo.department_name = kisiBilgileri.department_name;
            personalInfo.address1 = kisiBilgileri.address1;
            personalInfo.address2 = kisiBilgileri.address2;
            personalInfo.city = kisiBilgileri.city;
            personalInfo.state = kisiBilgileri.state;
            personalInfo.zipCode = kisiBilgileri.zipCode;
            personalInfo.country = kisiBilgileri.country;
            personalInfo.phone = kisiBilgileri.phone;
            personalInfo.email = kisiBilgileri.email;
            personalInfo.orderId = kisiBilgileri.orderId;
            personalInfo.registrationCode = registrationCode;
            personalInfo.date = DateTime.Now;
            personalInfo.conferenceName = conferenceName;
            db.DBpersonalInformations.InsertOnSubmit(personalInfo);
            db.SubmitChanges();
        }
        catch (Exception)
        {
        }
    }

此方法保存细节

public static void SaveAuthorPaperDetails(AuthorPaperDetailsBal authorPaperDetay, int userId)
{
        try
        {
            string cs = ConfigurationManager.AppSettings["SiteSqlServer"];

            DBWebDataContext db = new DBWebDataContext(cs);

            DBAuthorPaperDetail authorPaperDetail = new DBAuthorPaperDetail();

            authorPaperDetail.paper_title = authorPaperDetay.paperTitleDetails;
            authorPaperDetail.conference_maker_id = authorPaperDetay.confMakerId;
            authorPaperDetail.additional_paper_title = authorPaperDetay.additionalPprTtle;
            authorPaperDetail.areYouMainAuthor = authorPaperDetay.mainAuthor;
            authorPaperDetail.feeForFirstAuthorPaper = authorPaperDetay.registerFeeForFirstAuthor;
            authorPaperDetail.feeForAdditionalPaper = authorPaperDetay.regFeeForAdditionalPape;
            authorPaperDetail.feeForParticipCoAuthors = authorPaperDetay.regFeeForCoAuthors;
            authorPaperDetail.userId = userId;
            authorPaperDetail.firstCoAuthorName = authorPaperDetay.firstCoAuthor;
            authorPaperDetail.secondCoAuthorName = authorPaperDetay.secondCoAutho;
            authorPaperDetail.thirdCoAuthorName = authorPaperDetay.thirdCoAuthor;
            authorPaperDetail.toplamOdeme = authorPaperDetay.toplamMaliyet;
            db.DBAuthorPaperDetails.InsertOnSubmit(authorPaperDetail);
            db.SubmitChanges();
        }
        catch (Exception)
        {
        }
    }

【问题讨论】：

标签： c# database linq linq-to-sql

【解决方案1】：

我不知道为什么它不起作用。有什么想法吗？

...

catch (Exception)
{

}

嗯，这几乎解释了一切……不要这样做。曾经。数据库层试图告诉您问题出在哪里，而您正把手指放在耳朵里，希望它会消失。如果我不得不猜测：可能是由于被另一个 SPID 阻止而导致偶尔超时。

如果你不能做任何有用或适当的异常，就让它冒泡给调用者。如果它到达 UI，告诉用户它（或者只是在内部记录问题并告诉用户“有一个问题”）。

另外，LINQ-to-SQL 数据上下文是IDisposable；你应该在db 周围有using 声明。

【讨论】：

【解决方案2】：

除了 Marc 的回答...您调用了 SubmitChanges 两次。如果你想要原子数据存储，你应该调用一次。您可以使用关系属性创建对象图，并一次提交整个图。

public void SaveParentAndChildren()
{
  using (CustomDataContext myDC = new CustomDataContext())
  {
    Parent p = new Parent();
    Child c = new Child();
    p.Children.Add(c);
    myDC.Parents.InsertOnSubmit(p); //whole graph is now tracked by this data context
    myDC.SubmitChanges(); // whole graph is now saved to database
    // or nothing saved if an exception occurred.

  }  //myDC.Dispose is called for you here whether exception occurred or not
}

【讨论】：