C# 中自定义泛型类的示例

一、自定义泛型类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CSharpOOP_Lesson4
{

/// <summary>
/// 下拉框类
/// </summary>
public class CompBox<T>
    {

public string ItemText
        {
get;
set;
        }

public T ItemValue
        {
get;
set;
        }
    }
}

二、实体类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CSharpOOP_Lesson4
{
/// <summary>
/// 程序员类
/// </summary>
public class SE
    {

/// <summary>
/// 工号
/// </summary>
public string ID { get; set; }


/// <summary>
/// 姓名
/// </summary>
public string Name { get; set; }
    }
}

 

三、应用

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace CSharpOOP_Lesson4
{
public partial class Form1 : Form
    {
public Form1()
        {
            InitializeComponent();
        }

/// <summary>
/// 初始化
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Form1_Load(object sender, EventArgs e)
        {
            List<CompBox<SE>> list = new List<CompBox<SE>>();
            SE se = new SE();
            se.Name = "jack";
            se.ID = "10000";

// 下拉框对象
            CompBox<SE> comp = new CompBox<SE>();
            comp.ItemText = "jack";
            comp.ItemValue = se;

// 下拉框对象1
            CompBox<SE> comp1 = new CompBox<SE>();
            comp1.ItemText = "mary";
            comp1.ItemValue = se;

            list.Add(comp);
            list.Add(comp1);

// 绑定集合
            comboBox1.DataSource = list;
// 显示
            comboBox1.DisplayMember = "ItemText";
// 值
            comboBox1.ValueMember = "ItemValue";
        }

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
// 选择项
var se = (CompBox<SE>)this.comboBox1.SelectedItem;
        }
    }
}