C#調用7z實現文件的壓縮與解壓

C#調用7z實現文件的壓縮與解壓

1.關於7z

首先在這里先介紹一下7z壓縮軟件，7z是一種主流的 壓縮格式，它擁有極高的壓縮比。在計算機科學中，7z是一種可以使用多種壓縮算法進行數據壓縮的檔案格式。主要有以下特點：

• 來源且模塊化的組件結構
• 最高的壓縮比
• 強大的AES-256加密
• 可更改配置的壓縮算法
• 支持操大文件
• 支持多線程壓縮
• 具有多種壓縮文件格式

2.解壓縮實現代碼

實現對文件的解壓縮方法是通過cmd命令，調用7z程式通過cmd命令實現對文件進行解壓和壓縮的操作，具體實現代碼如下：

• 壓縮代碼

     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;
          }

• 解壓代碼

     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;
  
          }