要求：如下圖，使用線程操作
1、實時顯示當前時間
2、輸入加數和被加數，自動出現結果
分析：兩個問題解決的方式一致，使用子線程進行時間操作和加法操作，然後刷新主線程的控件顯示結果
代碼如下：
using System;
using System.Threading;
using System.Windows.Forms;
namespace WinThread
{
public partial class frmMain : Form
{
public frmMain()
{
InitializeComponent();
}
/// <summary>
/// 初始化
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void frmMain_Load(object sender, EventArgs e)
{
// 控件初始化
this.txtOne.Text = "0";
this.txtSecond.Text = "0";
// 顯示時間操作
Thread showTimeThread = new Thread(new ThreadStart(GetTime));
showTimeThread.IsBackground = true;
showTimeThread.Start();
// 加法操作
Thread addThread = new Thread(new ThreadStart(Add));
addThread.IsBackground = true;
addThread.Start();
}
#region 顯示時間操作
/// <summary>
/// 取得實時時間
/// </summary>
private void GetTime()
{
try
{
while (true)
{
string currentTime = string.Format("{0}.{1}", DateTime.Now.ToLongTimeString(), DateTime.Now.Millisecond);
ShowTime(currentTime);
Application.DoEvents();
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
// 定義顯示時間操作委托，用於回調顯示時間方法
delegate void ShowTimeCallBack(string str);
/// <summary>
/// 實時顯示時間
/// </summary>
/// <param name="str"></param>
private void ShowTime(string str)
{
if (this.txtCurrentTime.InvokeRequired)
{
ShowTimeCallBack showTimeCallBack = new ShowTimeCallBack(ShowTime);
this.Invoke(showTimeCallBack, new object[] { str });
}
else
{
this.txtCurrentTime.Text = str;
}
}
#endregion
#region 加法操作
/// <summary>
/// 加法操作
/// </summary>
private void Add()
{
try
{
while (true)
{
int i = Convert.ToInt32(this.txtOne.Text.Trim());
int j = Convert.ToInt32(this.txtSecond.Text.Trim());
ShowResult((i + j).ToString());
Application.DoEvents();
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
// 定義加法操作委托，用於回調加法操作方法
delegate void ShowResultCallBack(string result);
/// <summary>
/// 顯示結果
/// </summary>
/// <param name="result"></param>
private void ShowResult(string result)
{
if (this.txtResult.InvokeRequired)
{
// 寫法1
//ShowResultCallBack showResultCallBack = new ShowResultCallBack(ShowResult);
//this.Invoke(showResultCallBack, new object[] { result });
// 寫法2
//使用委托來賦值
this.txtResult.Invoke(
//委托方法
new ShowResultCallBack(ShowResult),
new object[] { result });
}
else
{
this.txtResult.Text = result;
}
}
#endregion
}
}
是不是很簡單呢？
