SelectList Not Coming Back Sorted - C#MVC 3

时间:2013-12-17 17:41:11

标签: c# asp.net-mvc-3 sorting selectlist

所有

我正在尝试对我的选择列表项进行排序,然后在列表中添加默认列表项,例如“选择下面的项目”并通过方法返回该列表。我注意到列表没有被排序,因为看起来,从ReSharper所说的,我需要返回排序结果 - 所以我的方法没有返回排序列表。

有没有办法在方法中进行排序和预先添加?

这就是我所拥有的:

       public static IEnumerable<SelectListItem> GetBuildingClubs(List<BuildingClub> localClubs, List<BuildingClub> psfyClubs)
    {
        var buildingClubList = new List<SelectListItem>();
        IEnumerable<BuildingClub> allBuildingClubs = localClubs.Union(psfyClubs);
        foreach (BuildingClub b in allBuildingClubs)
        {


            buildingClubList.Add(new SelectListItem
            {
                Value = b.MasterCustomerId,
                Text = b.NewBuildingClubName

            });


        }

        //Sort list
        buildingClubList.OrderBy(c => c.Text);

        //Prepend to sorted list
        buildingClubList.Insert(0, new SelectListItem
        {
            Value = "",
            Text = "Select an Item Below"

        });

        return buildingClubList;

    }

1 个答案:

答案 0 :(得分:4)

OrderBy不会修改输入列表;它返回一个新的排序序列。您需要存储该序列并使用它来构建列表:

buildingClubList = buildingClubList.OrderBy(c => c.Text).ToList();

或者,在将项目添加到列表之前对项目进行排序:

IEnumerable<BuildingClub> allBuildingClubs = localClubs.Union(psfyClubs).OrderBy(b => b.NewBuildingClubName);