C# winform中ComboBox数据绑定的两种方法及效率详解
目录
- 一、ComboBox两种数据绑定的方法
- 1.1、方法一、DataTable
- 1.2、方法二、List
- 二、比较两种方法的效率
- 2.1、窗体设计
- 2.2、代码
- 2.3、两种方法消耗时间对比
- 总结
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 publandroidic 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.ValueMembehttp://www.devze.comr = "SID"; AbtiJOhA 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"; returnpython 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 =编程 "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
总结
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