连接 EF 中的两个属性以填充 ComboBox [关闭]

Question

我正在使用实体框架、C# 和 .NET 4.5 开发一个新的 WinForms 项目。在我的数据库中，我有一个表'Teacher'，其中包含两列'FirstName'和'LastName'。如何使用这两个属性生成的值填充 ComboBox 控件？

场景：

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

还有ComboBox中的代码sn-p：

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全名值

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;
    }
}