C#调用7z实现文件的压缩与解压

C#调用7z实现文件的压缩与解压

1.关于7z

首先在这里先介绍一下7z压缩软件，7z是一种主流的 压缩格式，它拥有极高的压缩比。在计算机科学中，7z是一种可以使用多种压缩算法进行数据压缩的档案格式。主要有以下特点：

• 来源且模块化的组件结构
• 最高的压缩比
• 强大的AES-256加密
• 可更改配置的压缩算法
• 支持操大文件
• 支持多线程压缩
• 具有多种压缩文件格式

2.解压缩实现代码

实现对文件的解压缩方法是通过cmd命令，调用7z程式通过cmd命令实现对文件进行解压和压缩的操作，具体实现代码如下：

• 压缩代码

     public object CompressZipFile(string sourceFile, string destinationFile)
          {
              object resObj;
              Process process = new Process();
              string tempDestinationFile = "";
  
              try
              {
                  if (process == null)
                  {
                      process = new Process();
                  }
                  tempDestinationFile = destinationFile.ToLower().EndsWith(".zip") ? destinationFile : destinationFile + ".zip";
                  process.StartInfo.FileName = "cmd.exe";
                  string command1 = @"cd c:\progra~1\7-zip";
                  process.StartInfo.UseShellExecute = false;
                  process.StartInfo.RedirectStandardInput = true;
                  process.StartInfo.RedirectStandardOutput = true;
                  process.StartInfo.RedirectStandardError = true;
                  process.StartInfo.CreateNoWindow = true;
                  process.Start();
                  process.StandardInput.WriteLine(@"c:");
                  process.StandardInput.WriteLine(@"cd\");
                  process.StandardInput.WriteLine(command1);
                  process.StandardInput.WriteLine(@"7Z a -tzip " + destinationFile + " " + sourceFile);
                  process.StandardInput.WriteLine("exit");
  
                  string output = process.StandardOutput.ReadToEnd();
                  if (output.ToUpper().IndexOf("EVERYTHING IS OK") > -1)
                  {
                      resObj = new object[] { 0, "Compress file[" + destinationFile + "] OK!" };
                  }
                  else
                  {
                      resObj = new object[] { 1, "Compress File[" + destinationFile + "] Error!" };
                  }
  
              }
              catch (Exception ex)
              {
                  resObj = new object[] { 1, "Compress File[" + destinationFile + "] exception:" + ex.Message };
  
              }
              return resObj;
          }

• 解压代码

     public object decompressFile(string zipFilepath, string FileDir)
          {
              object resObj;
              try
              {
                  string batfiledata = @"c:\progra~1\7-zip\7z.exe x " + zipFilepath + " -o" + FileDir + " -y";
  
                  Process process = new Process();
                  process.StartInfo.FileName = "cmd.exe";
                  process.StartInfo.Arguments = "/c " + batfiledata;
                  process.StartInfo.UseShellExecute = false;
                  process.StartInfo.RedirectStandardInput = true;
                  process.StartInfo.RedirectStandardOutput = true;
                  process.StartInfo.RedirectStandardError = true;
                  process.StartInfo.CreateNoWindow = true;
                  process.Start();
  
                  string output = process.StandardOutput.ReadToEnd();
                  if (output.ToUpper().IndexOf("EVERYTHING IS OK") > -1)
                  {
                      resObj = new object[] { 0, "DeCompress file[" + zipFilepath + "] OK!" };
                  }
                  else
                  {
                      resObj = new object[] { 1, "DeCompress File[" + zipFilepath + "] Error!" };
                  }
  
              }
              catch (Exception ex)
              {
                  resObj = new object[] { 1, ex.Message };
              }
  
              return resObj;
  
          }