请问这个进度条方法怎么用 急急急
如何弹出一个模式窗口来显示进度条最近看了好多人问这方面的问题，以前我也写过一篇blog，里面说了如何在子线程中控制进度条。但目前大多数环境，需要弹出模式窗口，来显示进度条，那么只需要在原先的基础上稍作修改即可。
首先是进度条窗体，需要在上面添加进度条，然后去掉ControlBox。除此外，还要增加一个方法，用来控制进度条的增加幅度，具体如下：
///<summary>
/// Increase process bar
///</summary>
///<param name="nValue">the value increased</param>
///<returns></returns>
public bool Increase( int nValue )
{
if( nValue > 0 )
{
if( prcBar.Value + nValue < prcBar.Maximum )
{
prcBar.Value += nValue;
return true;
}
else
{
prcBar.Value = prcBar.Maximum;
this.Close();
return false;
}
}
return false;
}
接着就是主窗体了，如何进行操作了，首先需要定义两个私有成员，一个委托。其中一个私有成员是保存当前进度条窗体对象，另一个是保存委托方法（即增加进度条尺度），具体如下：
private frmProcessBar myProcessBar = null;
private delegate bool IncreaseHandle( int nValue );
private IncreaseHandle myIncrease = null;
接着要在主窗体中提供函数来打开进度条窗体，如下：
///<summary>
/// Open process bar window
///</summary>
private void ShowProcessBar()
{
myProcessBar = new frmProcessBar();
// Init increase event
myIncrease = new IncreaseHandle( myProcessBar.Increase );
myProcessBar.ShowDialog();
myProcessBar = null;
}
那么现在就可以开始创建线程来运行，具体如下：
///<summary>
/// Sub thread function
///</summary>
private void ThreadFun()
{
MethodInvoker mi = new MethodInvoker( ShowProcessBar );
this.BeginInvoke( mi );
Thread.Sleep( 1000 );//Sleep a while to show window
bool blnIncreased = false;
object objReturn = null;
do
{
Thread.Sleep( 50 );
objReturn = this.Invoke( this.myIncrease,
new object[]{ ７} );／／传的参数为整型7（IncreaseHandle( int nValue )）
blnIncreased = (bool)objReturn ;
}
while( blnIncreased );
}
注意以上，在打开进度条窗体和增加进度条进度的时候，一个用的是BeginInvoke，一个是Invoke，这里的区别是BeginInvoke不需要等待方法运行完毕，而Invoke是要等待方法运行完毕。还有一点，此处用返回值来判断进度条是否到头了，如果需要有其他的控制，可以类似前面的方法来进行扩展。
启动线程，可以如下：
Thread thdSub = new Thread( new ThreadStart( ThreadFun ) );
thdSub.Start();
这样，一个用模式打开进度条窗体就做完了。
我使用的是
private void Form1_Load(object sender, EventArgs e)
{
Thread thdSub = new Thread(new ThreadStart(ThreadFun));
thdSub.Start();
执行代码。。。。。
myIncrease.Invoke(100);
｝
但是不能用，不知道为什么？ --------------------编程问答-------------------- 给一个以前写的项目功能片段，你自己参考一下。这是用来复制文件的，你可以按照自己的需求做相应的修改。整个窗体文件都给你，窗体名称为：FormatCopy。
FormatCopy.cs 代码：
--------------------编程问答-------------------- 窗体名称：FormCopy，上面写错了。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Threading;
namespace Server
{
public partial class FormCopy : Form
{
string sourceDir = "";
string desDir = "";
Thread thread;
bool flag = false;
//原目录
public string SourceDir
{
get { return this.sourceDir; }
set { this.sourceDir = value; }
}
//目标目录
public string DestDir
{
get { return this.desDir; }
set { this.desDir = value; }
}
public FormCopy()
{
InitializeComponent();
}
private void FormCopy_Load(object sender, EventArgs e)
{
//在线程中处理文件复制可大大提高程序的运行效率
thread = new Thread(new ThreadStart(Copy));
thread.Start();
}
private void Copy()
{
DirectoryInfo dir = new DirectoryInfo(sourceDir);
CopyDirectorysAndFiles(desDir, dir);
flag = true;
this.Close();
}
/// <summary>
/// 复制指定文件夹中的子文件夹和文件
/// </summary>
/// <param name="destDir">目标文件夹路径</param>
/// <param name="sourceDir">DirectoryInfo 对象</param>
private void CopyDirectorysAndFiles(string destDir, DirectoryInfo sourceDir)
{
string[] str = desDir.Split(new string[] { "\\" }, StringSplitOptions.None);
if (destDir.LastIndexOf('\\') != (destDir.Length - 1))
{
destDir += "\\";
}
string destPath = destDir + sourceDir.Name + "\\";
if (!Directory.Exists(destPath))
{
Directory.CreateDirectory(destPath);
}
//复制文件
FileInfo[] files = sourceDir.GetFiles();
//文件总量
int length = 0;
for (int i = 0; i < files.Length; i++)
length += (int)files[i].Length;
this.progressBar1.Value = 0;
this.progressBar1.Maximum = length;
foreach (FileInfo file in files)
{
CopyFile(file, sourceDir.Name, destPath);
this.progressBar1.Value += (int)file.Length;
//此语句大大提高了程序的运行效率
Thread.Sleep(10);
}
DirectoryInfo[] dirs = sourceDir.GetDirectories();
foreach (DirectoryInfo dirInfo in dirs)
{
CopyDirectorysAndFiles(destPath, dirInfo);
}
}
/// <summary>
/// 文件复制函数(将被复制的文件按每包 10 兆大小将原文件分包，这样便于大容量文件的操作)
/// </summary>
/// <param name="file">FileInfo 文件对象</param>
/// <param name="src">原文件所在目录</param>
/// <param name="dest">目标文件所在目录</param>
private void CopyFile(FileInfo file, string src, string dest)
{
if (!flag)
{
string[] str = dest.Split(new string[] { "\\" }, StringSplitOptions.None);
this.label1.Text = file.Name + "\r\n\r\n从 \'" + src + "\' 到 \'" + str[str.Length - 2] + "\'";
//打开并读取文件
FileStream fs = new FileStream(file.FullName, FileMode.Open, FileAccess.Read);
int size = 1024 * 1024 * 10; //按每包 10 兆大小将原文件分包
int length = (int)fs.Length; //原文件大小
int package = length / size; //数据包的数量
int m = length % size; //剩余数据包的数据量
//二进制读取器
BinaryReader reader = new BinaryReader(fs);
//创建新文件
fs = new FileStream(dest + file.Name, FileMode.Create, FileAccess.Write);
//分包逐一读写文件(边读边写)
for (int i = 1; i <= package; i++)
{
//按指定数据包的大小读取数据
byte[] buffer = reader.ReadBytes(size);
//将读取的数据写入新文件中
fs.Write(buffer, 0, buffer.Length);
}
//如果有未尽数据包则继续读写
if (m != 0)
{
byte[] buffer = reader.ReadBytes(m);
fs.Write(buffer, 0, buffer.Length);
}
reader.Close();
fs.Close();
}
}
private void buttonCancel_Click(object sender, EventArgs e)
{
flag = true;
thread.Abort();
this.Close();
}
private void FormCopy_FormClosed(object sender, FormClosedEventArgs e)
{
thread.Abort();
flag = true;
}
}
}
窗体 FormCopy 设计器代码：
namespace Server
{
partial class FormCopy
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#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.progressBar1 = new System.Windows.Forms.ProgressBar();
this.buttonCancel = new System.Windows.Forms.Button();
this.pictureBox1 = new System.Windows.Forms.PictureBox();
this.label1 = new System.Windows.Forms.Label();
((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
this.SuspendLayout();
//
// progressBar1
//
this.progressBar1.Location = new System.Drawing.Point(27, 107);
this.progressBar1.Name = "progressBar1";
this.progressBar1.Size = new System.Drawing.Size(297, 20);
this.progressBar1.TabIndex = 1;
//
// buttonCancel
//
this.buttonCancel.Location = new System.Drawing.Point(330, 106);
this.buttonCancel.Name = "buttonCancel";
this.buttonCancel.Size = new System.Drawing.Size(75, 23);
this.buttonCancel.TabIndex = 2;
this.buttonCancel.Text = "取 消";
this.buttonCancel.UseVisualStyleBackColor = true;
this.buttonCancel.Click += new System.EventHandler(this.buttonCancel_Click);
//
// pictureBox1
//
this.pictureBox1.Image = global::Server.Properties.Resources.FILEMOVE;
this.pictureBox1.Location = new System.Drawing.Point(27, 0);
this.pictureBox1.Name = "pictureBox1";
this.pictureBox1.Size = new System.Drawing.Size(352, 54);
this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;
this.pictureBox1.TabIndex = 0;
this.pictureBox1.TabStop = false;
//
// label1
//
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(29, 63);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(41, 12);
this.label1.TabIndex = 4;
this.label1.Text = "label1";
//
// FormCopy
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(409, 137);
this.Controls.Add(this.label1);
this.Controls.Add(this.buttonCancel);
this.Controls.Add(this.progressBar1);
this.Controls.Add(this.pictureBox1);
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
this.MaximizeBox = false;
this.MinimizeBox = false;
this.Name = "FormCopy";
this.Text = "正在复制....";
this.FormClosed += new System.Windows.Forms.FormClosedEventHandler(this.FormCopy_FormClosed);
this.Load += new System.EventHandler(this.FormCopy_Load);
((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.PictureBox pictureBox1;
private System.Windows.Forms.ProgressBar progressBar1;
private System.Windows.Forms.Button buttonCancel;
private System.Windows.Forms.Label label1;
}
}
补充：.NET技术 , C#
