泛型 类 ComboBoxItem<T>

Convert ComboBoxItem into  Class array, which contains different class type

 

    public class ComboBoxItem<T>
    {
      
        private string _itemText;
        public string ItemText
        {
            get { return _itemText; }
            set { _itemText = value; }
        }
      

      
        private T _itemValue;
        public T ItemValue
        {
            get { return _itemValue; }
            set { _itemValue = value; }
        }
      

      
        public ComboBoxItem(string itemText, T itemValue)
        {
            this._itemText = itemText;
            this._itemValue = itemValue;
        }
      
        /**/
        /// <summary>
        /// 确定指定的对象是否等于当前对象。
        /// </summary>
        public override bool Equals(object obj)
        {
            if (obj is ComboBoxItem<T>)
            {
                ComboBoxItem<T> rhs = (ComboBoxItem<T>)obj;
                if (this._itemText.Equals(rhs.ItemText) && this._itemValue.Equals(rhs.ItemValue))
                    return true;
                else
                    return false;
            }
            else
                return false;
        }
        /**/
        /// <summary>
        /// 获取当前对象的哈希代码。
        /// </summary>
        public override int GetHashCode()
        {
            return ItemText.GetHashCode() + ItemValue.GetHashCode();
        }

        /**/
        /// <summary>
        /// 重载相等操作符
        /// </summary>
        public static bool operator ==(ComboBoxItem<T> lhs, ComboBoxItem<T> rhs)
        {
            return lhs.Equals(rhs);
        }
        /**/
        /// <summary>
        /// 重载不等操作符
        /// </summary>
        public static bool operator !=(ComboBoxItem<T> lhs, ComboBoxItem<T> rhs)
        {
            return !(lhs.Equals(rhs));
        }
      
    }

 

 

  public class Student
    {
     
        private string _name;
        public string Name
        {
            get { return _name; }
        }
     
        private int _age;
        public int Age
        {
            get { return _age; }
        }
     
        public Student(string name,int age)
        {
            _name = name;
            _age = age;
        }

    }

 

    public Form1()
        {
            InitializeComponent();
            List<ComboBoxItem<Student>> list = new List<ComboBoxItem<Student>>();
            list.Add(new ComboBoxItem<Student>("", null));
            Student s1 = new Student("Name 1", 15);
            Student s2 = new Student("Name 2", 16);
            list.Add(new ComboBoxItem<Student>(s1.Name, s1));
            list.Add(new ComboBoxItem<Student>(s2.Name, s2));
            //绑定到下拉框
            comboBox1.DataSource = list;
            comboBox1.DisplayMember = "ItemText";//显示的文字
            comboBox1.ValueMember = "ItemValue";//背后的对象
        }

      

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (comboBox1.SelectedIndex > 0)
            {
               
                Student s = (Student)comboBox1.SelectedValue;//获取Student对象
               
                MessageBox.Show(s.Age.ToString());
            }
        }