如何在一次添加查询添加和删除操作

Question

我有两个表，我有一个按钮控件，当我点击按钮时，table2中的记录添加到table1，并且该记录必须在table2中删除。 我写了像

public ActionResult Accept(int id, string selectedVal)       //To update Accept status 
     { 
      var retrieveID = (from i in dbContext.groups 
           where i.groups_name == selectedVal 
           select new { groups_id = i.Usr_contacts_groups_id }).FirstOrDefault(); 

      var currentId = 1; 
      var deleteQuery = dbContext.requests.Where(i => i.from_usr_id == id && i.to_usr_id == id).FirstOrDefault(); 

      contact contactGroup = new contact(); 

      contactGroup.groups_id = retrieveID.groups_id; 
      contactGroup.groups_usr_id = currentId; 



      this.dbContext.Add(contactGroup); 
      this.dbContext.Delete(deleteQuery); 
      try 
      { 
       this.dbContext.SaveChanges(); 

      } 
      catch 
      { 
       return View(); 
      } 
      return Json(null); 
     } 

我可以添加在表1的记录，并在删除查询“ID”值表2删除多条记录。

Answer 1

，在表2的记录添加到表1和记录在表2中删除

我会假设，用简单的英语：

，在table2记录应该添加到table1然后从table2中删除

换句话说，将记录从table1转换为table2，对吧？ （假设它是）

public ActionResult MoveRecord(int id) { 

    // get Table 2 record 
    var recordA = dbContext.table2.FirstOrDefault(x => x.bioId == id); 

    // if we did find a record 
    if (recordA != null) { 

     // let's add it into Table 1 
     var recordB = new Table2(); 
     recordB.id = recordA.id; 
     recordB.value = recordA.value; 

     // add to database 
     dbContext.table1.AddObject(recordB); 

     // now that we have it in the database, let's delete the original on 
     dbContext.table2.DeleteObject(recordA); 

     // save all changes 
     dbContext.SaveChanges(); 
    } 


    return RedirectToAction("Index"); 
}