c# - 排序下拉列表

Question

我正在使用 Entity Framework 数据库，我想从一个表中以正确的顺序填充我的下拉列表。

现在我正在使用代码:

var databaseList = from p in db.TECHNICAL_SKILLS
                   where p.skill_type == "Database"
                   select new EmployeeTechnicalSkillInfo
                       {
                           TechnicalSkillId = p.technical_skill_id,
                           SkillType = p.skill_type,
                           SkillName = p.skill_name
                       };

        List<object> sDataValue = new List<object>();
        sDataValue.Add("- Select -");
        sDataValue.Remove("Other");

        foreach (var vData in databaseList)
        {
            sDataValue.Add(vData.SkillName);
        }

        sDataValue.Add("Other");

        DropDownListDB.DataSource = sDataValue.ToArray();
        DropDownListDB.DataBind(); 

这就是解决方案

    var databaseList = from p in db.TECHNICAL_SKILLS
           where p.skill_type == "Database"
           orderby p.skill_name != "Other" descending, p.skill_name
           select new EmployeeTechnicalSkillInfo
               {
                   TechnicalSkillId = p.technical_skill_id,
                   SkillType = p.skill_type,
                   SkillName = p.skill_name
               };

Answer 1

删除条目 -Select-从列表中将其作为第一项附加到您的 List<object> :

List<object> sDataValue = new List<object>();
sDataValue.Add("-Select-");
foreach (var vData in databaseList){}

我认为这是最简单的方法。

编辑

那么你将使用if/else , 也许和

foreach (var vData in databaseList){} //fill your list
sDataValue.Add("-Other-");