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C#?winform中ComboBox數(shù)據(jù)綁定的兩種方法及效率詳解

更新時(shí)間：2023年08月04日 08:38:13 作者：chentiebo

這篇文章主要給大家介紹了關(guān)于C#?winform中ComboBox數(shù)據(jù)綁定的兩種方法及效率,Winform?ComboBox數(shù)據(jù)綁定是指將數(shù)據(jù)源中的數(shù)據(jù)與ComboBox控件進(jìn)行關(guān)聯(lián),需要的朋友可以參考下

一、ComboBox兩種數(shù)據(jù)綁定的方法

1.1、方法一、DataTable

           //創(chuàng)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-測(cè)試1";
            dataTable.Rows.Add(dataRow);
 
            DataRow dataRow1 = dataTable.NewRow();
            dataRow1["ID"] = "2";
            dataRow1["Name"] = "方法1-測(cè)試2";
            dataTable.Rows.Add(dataRow1);
 
            DataRow dataRow2 = dataTable.NewRow();
            dataRow2["ID"] = "3";
            dataRow2["Name"] = "方法1-測(cè)試3";
            dataTable.Rows.Add(dataRow2);
 
            // ComboBox數(shù)據(jù)綁定
            this.comboBox1.DataSource = dataTable;
            comboBox1.DisplayMember = "Name";
            comboBox1.ValueMember = "ID";

1.2、方法二、List

       //創(chuàng)建Test類
        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--測(cè)試1", 21);
            list.Add(test);
            Test test1 = new Test(2, "方法二--測(cè)試2", 22);
            list.Add(test1);
            Test test2 = new Test(3, "方法二--測(cè)試3", 23);
            list.Add(test2);
           // ComboBox數(shù)據(jù)綁定Lsit
            this.comboBox2.DataSource = list;
            comboBox2.DisplayMember = "Name";
            comboBox2.ValueMember = "SID";
            return list;
        }

二、比較兩種方法的效率

2.1、窗體設(shè)計(jì)

2.2、代碼

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 處理2
            //創(chuàng)建計(jì)時(shí)
            Stopwatch str1 = new Stopwatch();
            //計(jì)時(shí)開始
            str1.Start();
            //運(yùn)行方法一
            GetDate1();
            // 計(jì)時(shí)停止
            str1.Stop();
            //控件label1顯示出總共花費(fèi)的時(shí)間（單位毫秒）
            this.label1Time1.Text = str1.Elapsed.TotalMilliseconds.ToString();
            //創(chuàng)建計(jì)時(shí)
            Stopwatch str2 = new Stopwatch();
            //計(jì)時(shí)開始
            str2.Start();
            //運(yùn)行方法二
            GetDate2();
            // 計(jì)時(shí)停止
            str2.Stop();
            //控件label1顯示出總共花費(fèi)的時(shí)間（單位毫秒）
            this.label1Time2.Text = str2.Elapsed.TotalMilliseconds.ToString();
            #endregion 
        }
        #region ComboBox兩種數(shù)據(jù)綁定的方法
        //方法一，dataTable
        public DataTable GetDate1()
        {
            //創(chuàng)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-測(cè)試1";
            dataTable.Rows.Add(dataRow);
            DataRow dataRow1 = dataTable.NewRow();
            dataRow1["ID"] = "2";
            dataRow1["Name"] = "方法1-測(cè)試2";
            dataTable.Rows.Add(dataRow1);
            DataRow dataRow2 = dataTable.NewRow();
            dataRow2["ID"] = "3";
            dataRow2["Name"] = "方法1-測(cè)試3";
            dataTable.Rows.Add(dataRow2);
            // 數(shù)據(jù)綁定
            this.comboBox1.DataSource = dataTable;
            comboBox1.DisplayMember = "Name";
            comboBox1.ValueMember = "ID";
            return dataTable; 
        }
        // 方法二，list
            //創(chuàng)建Test類
        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--測(cè)試1", 21);
            list.Add(test);
            Test test1 = new Test(2, "方法二--測(cè)試2", 22);
            list.Add(test1);
            Test test2 = new Test(3, "方法二--測(cè)試3", 23);
            list.Add(test2);
            this.comboBox2.DataSource = list;
            comboBox2.DisplayMember = "Name";
            comboBox2.ValueMember = "SID";
            return list;
        }
         #endregion
    }
}

2.3、兩種方法消耗時(shí)間對(duì)比

list相對(duì)于DataTable消耗的時(shí)長(zhǎng)要少

總結(jié)

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