using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Diagnostics;
namespace Com.ImYan.CabHelper
{
/// <summary>
/// CAB文件压缩解压类
/// </summary>
public class Cab
{
#region 属性列表 Properties
private string _cabFileName;
/// <summary>
/// 生成或者解压的Cab文件路径
/// </summary>
public string CabFileName
{
get { return _cabFileName; }
set { _cabFileName = value; }
}
private List<string> _fileList=new List<string>();
/// <summary>
/// “将被压缩”或者“解压出”的文件列表
/// </summary>
public List<string> FileList
{
get { return _fileList; }
set { _fileList = value; }
}
/// <summary>
/// 临时目录
/// </summary>
private string TempDir;
#endregion
#region 构造函数 Structure
public Cab()
{
//指定并创建临时目录
this.TempDir = Environment.GetFolderPath(Environment.SpecialFolder.Templates);
this.TempDir = string.Format("{0}\CabTemp\", this.TempDir);
//如果存在，先删除
if (Directory.Exists(this.TempDir)) Directory.Delete(this.TempDir,true);
Directory.CreateDirectory(this.TempDir);
}
#endregion
#region 私有方法列表 Private Methods
/// <summary>
/// 生成 list.txt 文件
/// </summary>
private string CreateListFile()
{
try
{
string listFilePath = Path.Combine(this.TempDir, "list.txt");
string listContent = string.Empty;//文件内容
for (int i = 0; i < this.FileList.Count; i++)
{
listContent += string.Format(""{0}"rn", this.FileList[i]);
}
using (FileStream fs = new FileStream(listFilePath, FileMode.Create, FileAccess.Write))
{
StreamWriter sw = new StreamWriter(fs, Encoding.Default);
sw.Write(listContent);
sw.Flush();
sw.Close();
fs.Close();
}
return listFilePath;
}
catch (Exception ex)
{
return ex.Message;
}
}
/// <summary>
/// 执行CMD命令
/// </summary>
private string RunCommand(string cmdString)
{
Process p = new Process();
//启动DOS程序
p.StartInfo.FileName = "cmd.exe";
p.StartInfo.UseShellExecute = false;//不用Shell启动
p.StartInfo.RedirectStandardInput = true;//重定向输入
p.StartInfo.RedirectStandardOutput = true;//重定向输出
p.StartInfo.CreateNoWindow = true;//不显示窗口
p.Start();//开始进程
p.StandardInput.WriteLine(cmdString);// 向cmd.exe输入command
p.StandardInput.WriteLine("exit");//结束
p.WaitForExit(60000);//等等执行完成
string outPutString = p.StandardOutput.ReadToEnd();// 得到cmd.exe的输出
p.Close();
return outPutString;
}
/// <summary>
/// 分析并找到cab文件，然后提取到输出目录
/// </summary>
private void MoveCabFile()
{
string cabFilePath = string.Empty;
List<string> allFilesInTempDir = this.GetFilesFromDir(this.TempDir);
foreach (string file in allFilesInTempDir)
{
if (Path.GetExtension(file).ToLower() == ".cab")
{
cabFilePath = file;
break;
}
else
{
//否则删除之
File.Delete(file);
}
}
//转移文件
File.Move(cabFilePath, this.CabFileName);
}
/// <summary>
/// 从指定目录读取文件列表
/// </summary>
/// <param name="dir">要搜索的目录</param>
/// <param name="filters">后缀列表</param>
/// <returns></returns>
private List<string> GetFilesFromDir(string dir)
{
List<string> files = new List<string>(Directory.GetFiles(dir));
List<string> dirs = new List<string>(Directory.GetDirectories(dir));
foreach (string childDir in dirs)
{
files.AddRange(this.GetFilesFromDir(childDir));
}
return files;
}
/// <summary>
/// 从DOS命令返回的结果，分析并得到解压后的文件列表
/// </summary>
/// <param name="cmdResult">DOS返回的结果</param>
private void GetExpandedFileByCmdResult(string cmdResult)
{
//文件列表
this._fileList = new List<string>();
//分割结果
string[] resultRowList = cmdResult.Split(new string[] { "rn" }, StringSplitOptions.RemoveEmptyEntries);
//关键字
string keyString = string.Format("将 {0} 展开成",this.CabFileName.ToLower());
foreach (string resultRow in resultRowList)
{
if (resultRow.Trim().StartsWith(keyString))
{
string filePath = resultRow.Replace(keyString, "").Trim().Replace("。", "");
if (File.Exists(filePath))
{
this._fileList.Add(filePath);
}
}
}
}
#endregion
#region 公有方法列表 Public Methods
/// <summary>
/// 制作CAB文件
/// 【执行此方法前请先指定“FileList”属性的值】
/// </summary>
/// <param name="errorInfo">返回的错误信息</param>
/// <returns>是否成功</returns>
public bool MakeCab(out string errorInfo)
{
errorInfo = string.Empty;
try
{
//第一步：写临时文件 list.txt
string listFile = this.CreateListFile();
if (File.Exists(listFile) == false) throw new Exception("生成文件 list.txt 失败！");
//第二步：执行CMD命令
string cmdString = "makecab /F list.txt";
string cmdResult = this.RunCommand(cmdString);
//第三步：分析并找到cab文件，然后提取到输出目录
this.MoveCabFile();
if (File.Exists(this.CabFileName))
{
return true;
}
else
{
errorInfo = string.Format("文件 {0} 生成失败！", this.CabFileName);
return false;
}
}
catch (Exception ex)
{
errorInfo = ex.Message;
return false;
}
}
/// <summary>
/// 解压缩CAB文件
/// 【执行此方法前请先指定“CabFileName”属性的值】
/// </summary>
/// <param name="errorInfo">返回的错误信息</param>
/// <returns>是否成功</returns>
public bool ExpandCab(out string errorInfo)
{
errorInfo = string.Empty;
try
{
//第一步：检查源文件和目录文件夹
if (File.Exists(this.CabFileName) == false) throw new Exception("CAB源文件不存在！请指定正确的CabFileName的值！");
if (Directory.Exists(this.TempDir) == false) Directory.CreateDirectory(this.TempDir);
//第二步：执行CMD命令
string tempPath = this.TempDir.EndsWith("\") ? this.TempDir.Substring(0, this.TempDir.Length - 1) : this.TempDir;
string cmdString = string.Format("expand "{0}" "{1}" -f:*", this.CabFileName, tempPath);
string cmdResult = this.RunCommand(cmdString);
//第三步：分析得到解压的文件列表
this.GetExpandedFileByCmdResult(cmdResult);
return true;
}
catch (Exception ex)
{
errorInfo = ex.Message;
return false;
}
}
#endregion
}
}
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