不错的线程使用示例
/// <copyright from='1997' to='2001' company='Microsoft Corporation'>
/// Copyright (c) Microsoft Corporation. All Rights Reserved.
///
/// This source code is intended only as a supplement to Microsoft
/// Development Tools and/or on-line documentation. See these other
/// materials for detailed information regarding Microsoft code samples.
///
/// </copyright>
//------------------------------------------------------------------------------
namespace Microsoft.Samples.Windows.Forms.Cs.ProgressBarCtl {
using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;
using System.Threading;
// <doc>
// <desc>
// This class demonstrates the ProgressBar control.
// The ProgressBar is updated periodically via another thread based on the
// settings in this control
// </desc>
// </doc>
//
public class ProgressBarCtl : System.Windows.Forms.Form {
private System.ComponentModel.Container components;
protected internal System.Windows.Forms.Label label3;
protected internal System.Windows.Forms.Label lblCompleted;
protected internal System.Windows.Forms.TrackBar sldrSpeed;
protected internal System.Windows.Forms.ProgressBar progbar;
protected internal System.Windows.Forms.Label label5;
protected internal System.Windows.Forms.GroupBox grpBehavior;
protected internal System.Windows.Forms.Label label4;
protected internal System.Windows.Forms.Label label6;
protected internal System.Windows.Forms.Label lblValue;
protected internal System.Windows.Forms.ComboBox cmbStep;
private int iSleepTime ;
private Thread timedProgress ;
public ProgressBarCtl() : base() {
//
// Required for Win Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
iSleepTime = 100 ;
cmbStep.SelectedIndex = 0 ;
progbar.Step = 1 ;
}
protected override void OnLoad(EventArgs e) {
// Spin off a new thread to update the ProgressBar control
timedProgress = new Thread(new ThreadStart(TimedProgressProc));
timedProgress.IsBackground = true;
timedProgress.Start();
}
// <doc>
// <desc>
// This code executes on the Windows.Forms thread.
// </desc>
// </doc>
//
private void UpdateProgress() {
int min ;
double numerator, denominator, completed ;
//Reset to start if required
if (progbar.Value == progbar.Maximum) {
progbar.Value = progbar.Minimum ;
}
else {
progbar.PerformStep();
}
lblValue.Text = progbar.Value.ToString();
min = progbar.Minimum ;
numerator = progbar.Value - min ;
denominator = progbar.Maximum - min ;
completed = (numerator / denominator) * 100.0 ;
lblCompleted.Text = Math.Round(completed).ToString() + "%" ;
}
// <doc>
// <desc>
// This function runs in the timedProgress thread and updates the
// ProgressBar on the form.
// </desc>
// </doc>
//
private void TimedProgressProc() {
try {
MethodInvoker mi = new MethodInvoker(UpdateProgress);
while (true) {
Invoke(mi);
int iSleepTime = this.SleepTime;
Thread.Sleep(iSleepTime) ;
}
}
//Thrown when the thread is interupted by the main thread - exiting the loop
catch (ThreadInterruptedException e) {
if (e != null) {}
}
catch (Exception we) {
if (we != null) {
MessageBox.Show(we.ToString());
}
}
}
// <doc>
// <desc>
// Property controlling the progress of the progress bar - used by the background thread
// </desc>
// </doc>
//
private int SleepTime {
get {
lock(this) {
return iSleepTime ;
}
}
set {
lock(this) {
iSleepTime = value ;
}
}
}
/// <summary>
/// Clean up any resources being used
/// </summary>
public override void Dispose() {
/*
* We have to make sure that our thread doesn't attempt
* to access our controls after we dispose them.
*/
if (timedProgress != null) {
timedProgress.Interrupt();
timedProgress = null;
}
base.Dispose();
components.Dispose();
}
protected void sldrSpeed_Scroll(object sender, EventArgs e) {
TrackBar tb = (TrackBar) sender ;
int time = 110 - tb.Value ;
this.SleepTime = time ;
}
protected void cmbStep_SelectedIndexChanged(object sender, EventArgs e) {
try {
progbar.Step = Int32.Parse((string)cmbStep.SelectedItem);
}
catch (Exception ex) {
// thrown if Int32.Parse can't convert
if (ex !=null) {}
}
}
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor
/// </summary>
private void InitializeComponent() {
this.lblValue = new System.Windows.Forms.Label();
this.label4 = new System.Windows.Forms.Label();
this.label5 = new System.Windows.Forms.Label();
this.progbar = new System.Windows.Forms.ProgressBar();
this.grpBehavior = new System.Windows.Forms.GroupBox();
this.cmbStep = new System.Windows.Forms.ComboBox();
this.label3 = new System.Windows.Forms.Label();
this.sldrSpeed = new System.Windows.Forms.TrackBar();
this.label6 = new System.Windows.Forms.Label();
this.lblCompleted = new System.Windows.Forms.Label();
this.grpBehavior.SuspendLayout();
((System.ComponentModel.ISupportInitialize)(this.sldrSpeed)).BeginInit();
this.SuspendLayout();
//
// lblValue
//
this.lblValue.Location = new System.Drawing.Point(164, 93);
this.lblValue.Name = "lblValue";
this.lblValue.Size = new System.Drawing.Size(72, 18);
this.lblValue.TabIndex = 4;
//
// label4
//
this.label4.Location = new System.Drawing.Point(20, 93);
this.label4.Name = "label4";
this.label4.Size = new System.Drawing.Size(288, 18);
this.label4.TabIndex = 0;
this.label4.Text = "Completion Speed:";
//
// label5
//
this.label5.Location = new System.Drawing.Point(31, 65);
this.label5.Name = "label5";
this.label5.Size = new System.Drawing.Size(143, 28);
this.label5.TabIndex = 1;
this.label5.Text = "Percent Completed:";
//
// progbar
//
this.progbar.BackColor = System.Drawing.SystemColors.Control;
this.progbar.Location = new System.Drawing.Point(31, 28);
this.progbar.Name = "progbar";
this.progbar.Size = new System.Drawing.Size(245, 18);
this.progbar.Step = 1;
this.progbar.TabIndex = 0;
this.progbar.Text = "progbar";
//
// grpBehavior
//
this.grpBehavior.Controls.AddRange(new System.Windows.Forms.Control[] {
this.cmbStep,
this.label3,
this.sldrSpeed,
this.label4});
this.grpBehavior.Location = new System.Drawing.Point(317, 19);
this.grpBehavior.Name = "grpBehavior";
this.grpBehavior.Size = new System.Drawing.Size(318, 175);
this.grpBehavior.TabIndex = 5;
this.grpBehavior.TabStop = false;
this.grpBehavior.Text = "ProgressBar";
//
// cmbStep
//
this.cmbStep.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
this.cmbStep.DropDownWidth = 123;
this.cmbStep.Items.AddRange(new object[] {
"1",
"5",
"10",
"20"});
this.cmbStep.Location = new System.Drawing.Point(174, 28);
this.cmbStep.Name = "cmbStep";
this.cmbStep.Size = new System.Drawing.Size(123, 20);
this.cmbStep.TabIndex = 7;
this.cmbStep.SelectedIndexChanged += new System.EventHandler(this.cmbStep_SelectedIndexChanged);
//
// label3
//
this.label3.Location = new System.Drawing.Point(20, 28);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(62, 18);
this.label3.TabIndex = 6;
this.label3.Text = "Step:";
//
// sldrSpeed
//
this.sldrSpeed.BackColor = System.Drawing.SystemColors.Control;
this.sldrSpeed.Location = new System.Drawing.Point(20, 111);
this.sldrSpeed.Maximum = 100;
this.sldrSpeed.Minimum = 10;
this.sldrSpeed.Name = "sldrSpeed";
this.sldrSpeed.Size = new System.Drawing.Size(277, 42);
this.sldrSpeed.TabIndex = 1;
this.sldrSpeed.TabStop = false;
this.sldrSpeed.Text = "trackBar1";
this.sldrSpeed.TickFrequency = 10;
this.sldrSpeed.Value = 10;
this.sldrSpeed.Scroll += new System.EventHandler(this.sldrSpeed_Scroll);
//
// label6
//
this.label6.Location = new System.Drawing.Point(31, 93);
this.label6.Name = "label6";
this.label6.Size = new System.Drawing.Size(128, 18);
this.label6.TabIndex = 3;
this.label6.Text = "Value:";
//
// lblCompleted
//
this.lblCompleted.Location = new System.Drawing.Point(164, 65);
this.lblCompleted.Name = "lblCompleted";
this.lblCompleted.Size = new System.Drawing.Size(72, 18);
this.lblCompleted.TabIndex = 2;
//
// ProgressBarCtl
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(647, 202);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.grpBehavior,
this.lblValue,
this.label6,
this.lblCompleted,
this.label5,
this.progbar});
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
this.MaximizeBox = false;
this.MinimizeBox = false;
this.Name = "ProgressBarCtl";
this.Text = "ProgressBar";
this.Load += new System.EventHandler(this.ProgressBarCtl_Load);
this.grpBehavior.ResumeLayout(false);
((System.ComponentModel.ISupportInitialize)(this.sldrSpeed)).EndInit();
this.ResumeLayout(false);
}
// The main entry point for the application.
[STAThread]
public static void Main(string[] args) {
Application.Run(new ProgressBarCtl());
}
private void ProgressBarCtl_Load(object sender, System.EventArgs e)
{
}
}
}
/// Copyright (c) Microsoft Corporation. All Rights Reserved.
///
/// This source code is intended only as a supplement to Microsoft
/// Development Tools and/or on-line documentation. See these other
/// materials for detailed information regarding Microsoft code samples.
///
/// </copyright>
//------------------------------------------------------------------------------
namespace Microsoft.Samples.Windows.Forms.Cs.ProgressBarCtl {
using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;
using System.Threading;
// <doc>
// <desc>
// This class demonstrates the ProgressBar control.
// The ProgressBar is updated periodically via another thread based on the
// settings in this control
// </desc>
// </doc>
//
public class ProgressBarCtl : System.Windows.Forms.Form {
private System.ComponentModel.Container components;
protected internal System.Windows.Forms.Label label3;
protected internal System.Windows.Forms.Label lblCompleted;
protected internal System.Windows.Forms.TrackBar sldrSpeed;
protected internal System.Windows.Forms.ProgressBar progbar;
protected internal System.Windows.Forms.Label label5;
protected internal System.Windows.Forms.GroupBox grpBehavior;
protected internal System.Windows.Forms.Label label4;
protected internal System.Windows.Forms.Label label6;
protected internal System.Windows.Forms.Label lblValue;
protected internal System.Windows.Forms.ComboBox cmbStep;
private int iSleepTime ;
private Thread timedProgress ;
public ProgressBarCtl() : base() {
//
// Required for Win Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
iSleepTime = 100 ;
cmbStep.SelectedIndex = 0 ;
progbar.Step = 1 ;
}
protected override void OnLoad(EventArgs e) {
// Spin off a new thread to update the ProgressBar control
timedProgress = new Thread(new ThreadStart(TimedProgressProc));
timedProgress.IsBackground = true;
timedProgress.Start();
}
// <doc>
// <desc>
// This code executes on the Windows.Forms thread.
// </desc>
// </doc>
//
private void UpdateProgress() {
int min ;
double numerator, denominator, completed ;
//Reset to start if required
if (progbar.Value == progbar.Maximum) {
progbar.Value = progbar.Minimum ;
}
else {
progbar.PerformStep();
}
lblValue.Text = progbar.Value.ToString();
min = progbar.Minimum ;
numerator = progbar.Value - min ;
denominator = progbar.Maximum - min ;
completed = (numerator / denominator) * 100.0 ;
lblCompleted.Text = Math.Round(completed).ToString() + "%" ;
}
// <doc>
// <desc>
// This function runs in the timedProgress thread and updates the
// ProgressBar on the form.
// </desc>
// </doc>
//
private void TimedProgressProc() {
try {
MethodInvoker mi = new MethodInvoker(UpdateProgress);
while (true) {
Invoke(mi);
int iSleepTime = this.SleepTime;
Thread.Sleep(iSleepTime) ;
}
}
//Thrown when the thread is interupted by the main thread - exiting the loop
catch (ThreadInterruptedException e) {
if (e != null) {}
}
catch (Exception we) {
if (we != null) {
MessageBox.Show(we.ToString());
}
}
}
// <doc>
// <desc>
// Property controlling the progress of the progress bar - used by the background thread
// </desc>
// </doc>
//
private int SleepTime {
get {
lock(this) {
return iSleepTime ;
}
}
set {
lock(this) {
iSleepTime = value ;
}
}
}
/// <summary>
/// Clean up any resources being used
/// </summary>
public override void Dispose() {
/*
* We have to make sure that our thread doesn't attempt
* to access our controls after we dispose them.
*/
if (timedProgress != null) {
timedProgress.Interrupt();
timedProgress = null;
}
base.Dispose();
components.Dispose();
}
protected void sldrSpeed_Scroll(object sender, EventArgs e) {
TrackBar tb = (TrackBar) sender ;
int time = 110 - tb.Value ;
this.SleepTime = time ;
}
protected void cmbStep_SelectedIndexChanged(object sender, EventArgs e) {
try {
progbar.Step = Int32.Parse((string)cmbStep.SelectedItem);
}
catch (Exception ex) {
// thrown if Int32.Parse can't convert
if (ex !=null) {}
}
}
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor
/// </summary>
private void InitializeComponent() {
this.lblValue = new System.Windows.Forms.Label();
this.label4 = new System.Windows.Forms.Label();
this.label5 = new System.Windows.Forms.Label();
this.progbar = new System.Windows.Forms.ProgressBar();
this.grpBehavior = new System.Windows.Forms.GroupBox();
this.cmbStep = new System.Windows.Forms.ComboBox();
this.label3 = new System.Windows.Forms.Label();
this.sldrSpeed = new System.Windows.Forms.TrackBar();
this.label6 = new System.Windows.Forms.Label();
this.lblCompleted = new System.Windows.Forms.Label();
this.grpBehavior.SuspendLayout();
((System.ComponentModel.ISupportInitialize)(this.sldrSpeed)).BeginInit();
this.SuspendLayout();
//
// lblValue
//
this.lblValue.Location = new System.Drawing.Point(164, 93);
this.lblValue.Name = "lblValue";
this.lblValue.Size = new System.Drawing.Size(72, 18);
this.lblValue.TabIndex = 4;
//
// label4
//
this.label4.Location = new System.Drawing.Point(20, 93);
this.label4.Name = "label4";
this.label4.Size = new System.Drawing.Size(288, 18);
this.label4.TabIndex = 0;
this.label4.Text = "Completion Speed:";
//
// label5
//
this.label5.Location = new System.Drawing.Point(31, 65);
this.label5.Name = "label5";
this.label5.Size = new System.Drawing.Size(143, 28);
this.label5.TabIndex = 1;
this.label5.Text = "Percent Completed:";
//
// progbar
//
this.progbar.BackColor = System.Drawing.SystemColors.Control;
this.progbar.Location = new System.Drawing.Point(31, 28);
this.progbar.Name = "progbar";
this.progbar.Size = new System.Drawing.Size(245, 18);
this.progbar.Step = 1;
this.progbar.TabIndex = 0;
this.progbar.Text = "progbar";
//
// grpBehavior
//
this.grpBehavior.Controls.AddRange(new System.Windows.Forms.Control[] {
this.cmbStep,
this.label3,
this.sldrSpeed,
this.label4});
this.grpBehavior.Location = new System.Drawing.Point(317, 19);
this.grpBehavior.Name = "grpBehavior";
this.grpBehavior.Size = new System.Drawing.Size(318, 175);
this.grpBehavior.TabIndex = 5;
this.grpBehavior.TabStop = false;
this.grpBehavior.Text = "ProgressBar";
//
// cmbStep
//
this.cmbStep.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
this.cmbStep.DropDownWidth = 123;
this.cmbStep.Items.AddRange(new object[] {
"1",
"5",
"10",
"20"});
this.cmbStep.Location = new System.Drawing.Point(174, 28);
this.cmbStep.Name = "cmbStep";
this.cmbStep.Size = new System.Drawing.Size(123, 20);
this.cmbStep.TabIndex = 7;
this.cmbStep.SelectedIndexChanged += new System.EventHandler(this.cmbStep_SelectedIndexChanged);
//
// label3
//
this.label3.Location = new System.Drawing.Point(20, 28);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(62, 18);
this.label3.TabIndex = 6;
this.label3.Text = "Step:";
//
// sldrSpeed
//
this.sldrSpeed.BackColor = System.Drawing.SystemColors.Control;
this.sldrSpeed.Location = new System.Drawing.Point(20, 111);
this.sldrSpeed.Maximum = 100;
this.sldrSpeed.Minimum = 10;
this.sldrSpeed.Name = "sldrSpeed";
this.sldrSpeed.Size = new System.Drawing.Size(277, 42);
this.sldrSpeed.TabIndex = 1;
this.sldrSpeed.TabStop = false;
this.sldrSpeed.Text = "trackBar1";
this.sldrSpeed.TickFrequency = 10;
this.sldrSpeed.Value = 10;
this.sldrSpeed.Scroll += new System.EventHandler(this.sldrSpeed_Scroll);
//
// label6
//
this.label6.Location = new System.Drawing.Point(31, 93);
this.label6.Name = "label6";
this.label6.Size = new System.Drawing.Size(128, 18);
this.label6.TabIndex = 3;
this.label6.Text = "Value:";
//
// lblCompleted
//
this.lblCompleted.Location = new System.Drawing.Point(164, 65);
this.lblCompleted.Name = "lblCompleted";
this.lblCompleted.Size = new System.Drawing.Size(72, 18);
this.lblCompleted.TabIndex = 2;
//
// ProgressBarCtl
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(647, 202);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.grpBehavior,
this.lblValue,
this.label6,
this.lblCompleted,
this.label5,
this.progbar});
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
this.MaximizeBox = false;
this.MinimizeBox = false;
this.Name = "ProgressBarCtl";
this.Text = "ProgressBar";
this.Load += new System.EventHandler(this.ProgressBarCtl_Load);
this.grpBehavior.ResumeLayout(false);
((System.ComponentModel.ISupportInitialize)(this.sldrSpeed)).EndInit();
this.ResumeLayout(false);
}
// The main entry point for the application.
[STAThread]
public static void Main(string[] args) {
Application.Run(new ProgressBarCtl());
}
private void ProgressBarCtl_Load(object sender, System.EventArgs e)
{
}
}
}
