c# - ASP.NET MVC 4 连接两个表

Question

我有 2 个表，一个是 Issues，另一个是 JiraAssignee。问题具有名为 AssigneeID 的列，JiraAssignee 由 AssigeeID 和AssigneeName 组成。我需要那里的AssigneeName。

我已尝试查询，但它不会从 JiraAssignee 表返回值。

   public ActionResult COED()
    {
     var model = new SO_80.Models.Tables();
     string COED = "COED";

     model.Issue = db.Issues.Where(d => 
     model.JiraAssignee = (from d in db.Issues.Where(d => d.JiraIssueKey.Contains(COED)).ToList()
                              join j in db.JiraAssignees.ToList() on d.JiraAssigneeID equals j.ID
                              select new JiraAssignee() { DisplayName = j.DisplayName });
     return View(model);
    }

Answer 1

您可以使用此代码:

public ActionResult COED()
    {
     var model = new SO_80.Models.Tables();
     string COED = "COED";
     Issue result = null;
     using (Entities db = new Entities())
            {
              result = (from d in db.Issues
                        join j in db.JiraAssignees on db.Issues equals j.ID 
                        where j.JiraIssueKey.ToLower().Trim().Contains(COED)
                        select d).FirstOrDefault();
            }
     return View(result);
    }