linq，其中包含容器类型

Question

我有一个类似的存储库方法

  public List<Township> lst(string multipletownship)
    {
        var foo = from x in db.Townships
                  select new { x.TownshipID, x.JTownshipName };
        string[] sarr;
        if (multipletownship.Contains(','))
        {
            sarr = multipletownship.Split(',');
            foo = foo.Where(s => s.TownshipID == sarr[0] || s.TownshipID==sarr[1]);
        }
        else
        {
            foo = foo.Where(s => s.TownshipID == multipletownship);
        }

multipletown参数值是1,2。这些是town id。问题是我如何在if condition将townshipid过滤为多个。这是可能的，或者我必须处理一些循环。。。

Answer 1

如果multipletown字符串中没有,，那么您将获得一个包含单个项的数组：

public List<Township> lst(string multipletownship)
{
    string[] sarr = multipletownship.Split(',');
    var foo = from x in db.Townships
              where sarr.Contains(x.TownshipID)
              select new { x.TownshipID, x.JTownshipName };
    // return
}