在EF中连接两个属性以填充ComboBox

Question

我正在使用Entity Framework，C＃和.NET 4.5开发一个新的WinForms项目。在我的数据库中，我有一张桌子＆＃39;老师＆＃39;有两列＆＃39; FirstName＆＃39;和＆＃39;姓氏＆＃39;。我怎么能用这两个属性的值填充ComboBox控件？

情景：

private List<Teacher> ShowTeacher(String teacherID) 
{
   List<Teacher> teachers = (from teacher in context.Teacher 
                            select teacher).Where(t => t.UserID == teacherID).ToList();
   return teachers;  
}

ComboBox中的代码片段：

cmbTeacher.DataSource = ShowTeacher(teacherID);
cmbTeacher.DisplayMember = ""; //here should be placed the string "FisrtName"+"LastName"

提前致谢

Answer 1

您需要在数据源中包含fullname值

List<Teacher> teachers = (from teacher in context.Teacher 
                          let FullName = teacher.FirstName + " " + teacher.LastName
                          select teacher).Where(t => t.UserID == teacherID).ToList();

cmbTeacher.DataSource = ShowTeacher(teacherID);
cmbTeacher.DisplayMember = "FullName";

---

class Teacher 
{
    public string FirstName
    {
        get;
        set;
    }

    public string LastName
    {
        get;
        set;
    }

    public string FullName
    {
        get
        {
            return LastName + " " + FirstName;
        }
    }

    public Teacher(string firstname, string lastname)
    {
        FirstName = firstname;
        LastName = lastname;
    }
}