C# winform中ComboBox两种数据绑定的方法及其效率

一、ComboBox两种数据绑定的方法

1.1、方法一、DataTable

           //创建DataTable
            DataTable dataTable = new DataTable();

            dataTable.Columns.Add("ID");
            dataTable.Columns.Add("Name");

            DataRow dataRow = dataTable.NewRow();

            dataRow["ID"] = "1";
            dataRow["Name"] = "方法1-测试1";
            dataTable.Rows.Add(dataRow);

            DataRow dataRow1 = dataTable.NewRow();
            dataRow1["ID"] = "2";
            dataRow1["Name"] = "方法1-测试2";
            dataTable.Rows.Add(dataRow1);

            DataRow dataRow2 = dataTable.NewRow();
            dataRow2["ID"] = "3";
            dataRow2["Name"] = "方法1-测试3";
            dataTable.Rows.Add(dataRow2);

            // ComboBox数据绑定
            this.comboBox1.DataSource = dataTable;
            comboBox1.DisplayMember = "Name";
            comboBox1.ValueMember = "ID";

1.2、方法二、List

       //创建Test类
        public class Test
        {
            public Test() { }

            public Test(int sid, string name, int age)
            {
                SID = sid;
                Name = name;
                Age = age;
            }
            public string Name { get; }
            public int Age { get; }
            public int SID { get; }

         }

          

        public List<Test> GetDate2()
        {

            List<Test> list = new List<Test>();

            Test test = new Test(1, "方法二--测试1", 21);
            list.Add(test);

            Test test1 = new Test(2, "方法二--测试2", 22);

            list.Add(test1);

            Test test2 = new Test(3, "方法二--测试3", 23);

            list.Add(test2);

           // ComboBox数据绑定Lsit

            this.comboBox2.DataSource = list;
            comboBox2.DisplayMember = "Name";
            comboBox2.ValueMember = "SID";

            return list;

        }

二、比较两种方法的效率

2.1、窗体设计

2.2、代码

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

namespace WindowsFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            方法一
            //this.comboBox1.DataSource = GteDate1();

            //comboBox1.DisplayMember = "Name";
            //comboBox1.ValueMember = "ID";

            方法二
            //this.comboBox2.DataSource = GetDate2();

            //comboBox2.DisplayMember = "Name";
            //comboBox2.ValueMember = "SID";

            #region 处理2

            //创建计时
            Stopwatch str1 = new Stopwatch();

            //计时开始
            str1.Start();

            //运行方法一
            GetDate1();

            // 计时停止
            str1.Stop();

            //控件label1显示出总共花费的时间（单位毫秒）
            this.label1Time1.Text = str1.Elapsed.TotalMilliseconds.ToString();

            //创建计时
            Stopwatch str2 = new Stopwatch();

            //计时开始
            str2.Start();

            //运行方法二
            GetDate2();

            // 计时停止
            str2.Stop();

            //控件label1显示出总共花费的时间（单位毫秒）
            this.label1Time2.Text = str2.Elapsed.TotalMilliseconds.ToString();

            #endregion 

          

        }

        #region ComboBox两种数据绑定的方法
        //方法一，dataTable
        public DataTable GetDate1()
        {

            //创建DataTable
            DataTable dataTable = new DataTable();

            dataTable.Columns.Add("ID");
            dataTable.Columns.Add("Name");

            DataRow dataRow = dataTable.NewRow();

            dataRow["ID"] = "1";
            dataRow["Name"] = "方法1-测试1";
            dataTable.Rows.Add(dataRow);

            DataRow dataRow1 = dataTable.NewRow();
            dataRow1["ID"] = "2";
            dataRow1["Name"] = "方法1-测试2";
            dataTable.Rows.Add(dataRow1);

            DataRow dataRow2 = dataTable.NewRow();
            dataRow2["ID"] = "3";
            dataRow2["Name"] = "方法1-测试3";
            dataTable.Rows.Add(dataRow2);

            // 数据绑定
            this.comboBox1.DataSource = dataTable;
            comboBox1.DisplayMember = "Name";
            comboBox1.ValueMember = "ID";

           

            return dataTable; 

        }

        // 方法二，list

            //创建Test类
        public class Test
        {
            public Test() { }

            public Test(int sid, string name, int age)
            {
                SID = sid;
                Name = name;
                Age = age;
            }
            public string Name { get; }
            public int Age { get; }
            public int SID { get; }

         }

        public List<Test> GetDate2()
        {

            List<Test> list = new List<Test>();

            Test test = new Test(1, "方法二--测试1", 21);

            list.Add(test);

            Test test1 = new Test(2, "方法二--测试2", 22);

            list.Add(test1);

            Test test2 = new Test(3, "方法二--测试3", 23);

            list.Add(test2);

            this.comboBox2.DataSource = list;
            comboBox2.DisplayMember = "Name";
            comboBox2.ValueMember = "SID";

            return list;

        }

         #endregion
    }
}

2.3、两种方法消耗时间对比

list相对于DataTable消耗的时长要少