多线程实现Copy

短命女 2021-11-23 06:52 96阅读 0赞

![2012073119401327.gif][]

1 using System;
     2 using System.Collections.Generic;
     3 using System.ComponentModel;
     4 using System.Data;
     5 using System.Drawing;
     6 using System.Linq;
     7 using System.Text;
     8 using System.Windows.Forms;
     9 using System.IO;
    10 using System.Threading;
    11 namespace ThreadCopy
    12 {
    13     public partial class Form1 : Form
    14     {
    15         public Form1()
    16         {
    17             InitializeComponent();
    18             CheckForIllegalCrossThreadCalls = false;
    19         }
    20 
    21         private void bt_Click(object sender, EventArgs e)
    22         {
    23             Thread thread = new Thread(this.CopyFile);
    24             thread.Start();
    25 
    26         }
    27         private void CopyFile()
    28         {
    29             FileStream readstream = null;
    30             FileStream writestream = null;
    31             //源文件Textbox sf,目标文件Textbox mf
    32             //源文件sfile,目标文件mfile
    33             string sfile = this.sf.Text.Trim();
    34             string mfile = this.mf.Text.Trim();
    35             if(!File.Exists(sfile))
    36             {
    37                 MessageBox.Show("源文件不存在");
    38                 return;
    39             }
    40             readstream = File.Open(sfile,FileMode.Open);
    41             if (File.Exists(mfile))
    42             {
    43                 DialogResult dr = MessageBox.Show("是否要覆盖文件？", "警告", MessageBoxButtons.OKCancel);
    44                 if (dr == DialogResult.OK)
    45                 {
    46                     writestream = File.Open(mfile, FileMode.Truncate);
    47 
    48                 }
    49                 else
    50                 {
    51                     return;
    52                 }
    53             }
    54             else
    55             {
    56                 writestream = File.Open(mfile,FileMode.Create);
    57 
    58             }
    59             byte[] bt = new byte[1024];
    60             int i = 0;
    61             long count = readstream.Length;
    62             int r = 0;
    63             string str = "";
    64             while((i = readstream.Read(bt,0,bt.Length))!=0)
    65             {
    66                 writestream.Write(bt,0,i);
    67                 r = r + i;
    68                 str = ((double)r / count * 100).ToString("0.0") + "%";
    69         //prola lable.Name用来显示复制的百分比
    70                 this.prola.Text = str;
    71         //coula lable.Name用来显示文件的大小
    72                 this.coula.Text = count.ToString();
    73         //proba lable.Name用来显示复制的进程
    74                 this.probr.Maximum = (int)count;
    75                 this.probr.Value = r;
    76                 if(r == count)
    77                 {
    78                     this.probr.Value = 0;
    79                 }
    80 
    81             }
    82             
    83         }
    84     }
    85 }

转载于:https://www.cnblogs.com/zhouxy/archive/2012/07/31/2617292.html

[2012073119401327.gif]: /images/20211122/d29e0ca5d5cc472689f853a5943786ad.png