如何用c#做一个秒表

Answer 1

由于目前用到了C#的有关知识，但之前没有C#的基础，所以趁着机会正好学习学习。

本篇博文，记录下利用C#实现一个简单的秒表计时器，基本界面如下图。

功能说明：点击“开始”开始计时，点击“暂停”暂停计时，点击“”停止“”停止计时，再点击“开始”，重新开始计时。

首先，我们在窗体设计窗口画出该界面，由1个Label，3个button构成。双击按钮添加事件。

核心部分是用秒表对象Stopwatch和时钟Timer实现的。

程序源代码如下：

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


namespace Ch04Ex04
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}


Timer time = new Timer();
Stopwatch sw; //秒表对象
TimeSpan ts;
static int count = 1;


private void button1_Click(object sender, EventArgs e)
{
//开始按钮
button2.Enabled = true;
button3.Enabled = true;
if(button2.Text == "继续") //开始后将继续按钮重置为暂停
button2.Text = "暂停";
sw = new Stopwatch();
time.Tick += new EventHandler(time_Tick);  //时钟触发信号
time.Interval = 1;
sw.Start();
time.Start();
}


void time_Tick(object sender, EventArgs e)
{
ts = sw.Elapsed;
label1.Text = string.Format("{0}:{1}:{2}:{3}", ts.Hours, ts.Minutes, ts.Seconds,ts.Milliseconds/10);
}


private void button3_Click(object sender, EventArgs e)
{
//停止时间按钮
sw.Stop();
time.Stop();
label1.Text = string.Format("{0}:{1}:{2}:{3}", 0, 0, 0, 0);
}

private void Form1_Load(object sender, EventArgs e)
{
button2.Enabled = false;
button3.Enabled = false;
}


private void button2_Click(object sender, EventArgs e)
{
if (button2.Text == "暂停")
{
//暂停事件按钮
button2.Text = "继续";
sw.Stop();
time.Stop();
}
else if (button2.Text == "继续")
{
//继续事件
button2.Text = "暂停";
sw.Start();
time.Start();
}
}

}
}


秒表运行结果如图所示。


下一步工作：在左下方添加一个label，实验多次暂停的功能，即能保存秒表的多个中间结果，如记录多名同学的长跑成绩的时候，暂停按钮只是记录到达终点的同学的成绩，计时还在继续，这个功能不难实现，给自己也给各位一个动手的余地。

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以下是窗体设计器自动生成的代码，辅助参考。

#region Windows 窗体设计器生成的代码


/// <summary>
/// 设计器支持所需的方法 - 不要
/// 使用代码编辑器修改此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.button3 = new System.Windows.Forms.Button();
this.label1 = new System.Windows.Forms.Label();
this.button2 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(204, 78);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(38, 23);
this.button1.TabIndex = 0;
this.button1.Text = "开始";
this.button1.UseVisualStyleBackColor = true;
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button3
//
this.button3.Location = new System.Drawing.Point(205, 163);
this.button3.Name = "button3";
this.button3.Size = new System.Drawing.Size(37, 23);
this.button3.TabIndex = 2;
this.button3.Text = "停止";
this.button3.UseVisualStyleBackColor = true;
this.button3.Click += new System.EventHandler(this.button3_Click);
//
// label1
//
this.label1.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(224)))), ((int)(((byte)(224)))), ((int)(((byte)(224)))));
this.label1.Font = new System.Drawing.Font("宋体", 24F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
this.label1.Location = new System.Drawing.Point(30, 33);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(202, 42);
this.label1.TabIndex = 3;
this.label1.Text = "0:0:0:0";
//
// button2
//
this.button2.Location = new System.Drawing.Point(205, 122);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(38, 23);
this.button2.TabIndex = 4;
this.button2.Text = "暂停";
this.button2.UseVisualStyleBackColor = true;
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(284, 262);
this.Controls.Add(this.button2);
this.Controls.Add(this.label1);
this.Controls.Add(this.button3);
this.Controls.Add(this.button1);
this.Name = "Form1";
this.RightToLeftLayout = true;
this.Text = "秒表";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);


}


#endregion