LINQ to SQL-插入新记录 [英] LINQ to SQL - Insert New Record

问题描述

我有一个带有自动递增ID字段的数据库表.该表通过实体数据模型通过代码公开.我正在尝试向该表中写入新记录.我有一种方法需要负责创建这些记录.此方法接受记录的属性值.它需要创建一条记录，并在另一个表中写入参考记录.当前，这是我正在尝试的

I have a database table with an auto-incrementing ID field. this table is exposed to by code via a Entity Data Model. I am trying to write a new record to this table. I have a method that needs to be responsible for creating these records. This method takes in the property values of the record. It needs to create a record, and write a reference record in another table. Currently, here is what I am trying

public int CreateRecord(string name, string description, List<int> ids)
{
  using (DatabaseContext database = new DatabaseContext())
  {
    Record record = new Record();
    record.Name = name;
    record.Description = description;

    database.Records.InsertOnSubmit(record);
    database.SubmitChanges();

    List<RecordTrack> tracks = new List<RecordTrack>();
    foreach (int id in ids)
    {
      RecordTrack track = new RecordTrack();
      track.RecordID = record.ID;
      track.ID = id;
      tracks.Add(track);
    } 
    database.Tracks.InsertAllOnSubmit(tracks);
    database.SubmitChanges();
  }
}

我似乎无法以这种方式保存记录.当我通过要插入的Record时，我能够做到这一点.但是由于其他因素，我需要一种从头开始纯粹创建记录的方法.我在做什么错了?

I can't seem to get the record to save in this manner. I was able to do it when I passed a Record in that I wanted to insert. But due to other factors, I need a way to purely create the record here from scratch. What am I doing wrong?

谢谢！

推荐答案

在数据库上下文中应该有一个 AddToRecord()函数.使用该函数添加 record 变量，然后从数据库上下文中调用 SaveChanges().

there should be a AddToRecord() function in your database context. Use that function to add your record variable and then call SaveChanges() from your database context.

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