c# 动态操作 zip\rar 文件，压缩解压组件使用

末蓝、 2024-02-17 16:37 70阅读 0赞

**c\# 动态操作 zip\\rar 文件，压缩解压组件使用**

**c\# 动态操作一个压缩文件，可以动态完成以下操作  
1.创建一个 zip  
2.向 zip 中附加文件  
3.更新 zip 中指定文件  
4.删除 zip 中指定文件  
5.解压缩 zip**

**6.在zip中提取一个文件**

using System;
    using System.IO;
    using Ionic.Zip;
    using Microsoft.VisualStudio.TestTools.UnitTesting;
    using System.Linq;
    
    namespace TestIonicZip
    {
        [TestClass]
        public class TestZip
        {
            /// <summary>
            /// 创建一个 zip
            /// </summary>
            [TestMethod]
            public void CreateZip()
            {
                var baseDir = Path.GetFullPath(@"..\..\zips");
                var zipPath = Path.Combine(baseDir,
                    string.Format("{0}.zip", DateTime.Now.ToString("yyyyMMddHHmmss")));
    
                var imgDir = Path.GetFullPath(@"..\..\img");
                var files = Directory.GetFiles(imgDir);
    
                using (ZipFile zip = new ZipFile())
                {
                    String[] filenames = System.IO.Directory.GetFiles(imgDir);
    
                    foreach (String filename in filenames)
                    {
                        ZipEntry e = zip.AddFile(filename,"");
                        e.Comment = "Added by Cheeso's CreateZip utility.";
                    }
    
                    zip.Comment = String.Format("This zip archive was created by the CreateZip example application on machine '{0}'",
                        System.Net.Dns.GetHostName());
    
                    zip.Save(zipPath);
                }
            }
            /// <summary>
            /// 向 zip 中附加文件
            /// </summary>
            [TestMethod]
            public void AppendToZip()
            {
                var baseDir = Path.GetFullPath(@"..\..\zips");
                var zipPath = Path.Combine(baseDir,
                    string.Format("{0}.zip", DateTime.Now.ToString("yyyyMMddHHmmss")));
                var zipFix = Path.Combine(baseDir,"20151202194926.zip");
    
                var imgDir = Path.GetFullPath(@"..\..\img");
                var files = Directory.GetFiles(imgDir);
    
                using (ZipFile zip = new ZipFile(zipFix))
                {
                    String[] filenames = System.IO.Directory.GetFiles(imgDir);
    
                    foreach (String filename in filenames)
                    {
                        ZipEntry e = zip.AddFile(filename, "aa");
                        e.Comment = "Added by Cheeso's CreateZip utility.";
                    }
    
                    zip.Comment = String.Format("This zip archive was created by the CreateZip example application on machine '{0}'",
                        System.Net.Dns.GetHostName());
    
                    zip.Save();
                }
            }
            /// <summary>
            /// 更新 zip 中指定文件
            /// </summary>
            [TestMethod]
            public void UpdateZip()
            {
                var baseDir = Path.GetFullPath(@"..\..\zips");
                var zipPath = Path.Combine(baseDir,
                    string.Format("{0}.zip", DateTime.Now.ToString("yyyyMMddHHmmss")));
                var zipFix = Path.Combine(baseDir, "20151202194926.zip");
    
                var imgDir = Path.GetFullPath(@"..\..\img");
                var files = Directory.GetFiles(imgDir);
    
                var bCount = 0;
                var aCount = 0;
                using (ZipFile zip = new ZipFile(zipFix))
                {
                    // note: this does not recurse directories! 
                    String[] filenames = System.IO.Directory.GetFiles(imgDir);
    
                    bCount = zip.Count;
                    //删除一个文件
                    var fileName = "003.jpg";
                    var sourceFile = Path.Combine(imgDir, "004.jpg");
                    if (zip.ContainsEntry(fileName))
                    {
                        var stream = File.OpenRead(sourceFile);
                        var z = zip.UpdateEntry(fileName, stream);
                        z.Comment = DateTime.Now.ToString();
                    }
                    zip.Comment = String.Format("This zip archive was created by the CreateZip example application on machine '{0}'",
                        System.Net.Dns.GetHostName());
    
                    zip.Save();
    
                    aCount = zip.Count;
                }
            }
            /// <summary>
            /// 删除 zip 中指定文件
            /// </summary>
            [TestMethod]
            public void DeleteFromZip()
            {
                var baseDir = Path.GetFullPath(@"..\..\zips");
                var zipPath = Path.Combine(baseDir,
                    string.Format("{0}.zip", DateTime.Now.ToString("yyyyMMddHHmmss")));
                var zipFix = Path.Combine(baseDir, "20151202194926.zip");
    
                var imgDir = Path.GetFullPath(@"..\..\img");
                var files = Directory.GetFiles(imgDir);
    
                var bCount = 0;
                var aCount = 0;
                using (ZipFile zip = new ZipFile(zipFix))
                {
                    // note: this does not recurse directories! 
                    String[] filenames = System.IO.Directory.GetFiles(imgDir);
    
                    bCount = zip.Count;
                    //删除一个文件
                    if(zip.ContainsEntry("002.jpg"))
                        zip.RemoveEntry("002.jpg");
                    //删除一个文件，目录
                    var removeFile = "/aa/002.jpg";
                    if (zip.ContainsEntry(removeFile))
                        zip.RemoveEntry(removeFile);
    
                    zip.Comment = String.Format("This zip archive was created by the CreateZip example application on machine '{0}'",
                        System.Net.Dns.GetHostName());
    
                    zip.Save();
    
                    aCount = zip.Count;
                }
                Assert.IsTrue(bCount-1==aCount);
            }
    
            /// <summary>
            /// 解压缩 zip 
            /// </summary>
            [TestMethod]
            public void ExtractZip()
            {
                var baseDir = Path.GetFullPath(@"..\..\zips");
                var zipPath = Path.Combine(baseDir,
                    string.Format("{0}.zip", DateTime.Now.ToString("yyyyMMddHHmmss")));
                var zipFix = Path.Combine(baseDir, "20151202194926.zip");
    
                var imgDir = Path.GetFullPath(@"..\..\img");
                var files = Directory.GetFiles(imgDir);
    
                var bCount = 0;
                var aCount = 0;
                
                using (ZipFile zip = new ZipFile(zipFix))
                {
                    var dir = Path.Combine(baseDir, "Extract");
                    zip.ExtractAll(dir);
                }
            }
    
            /// <summary>
            /// 提取一个 文件
            /// </summary>
            [TestMethod]
            public void ExtractZipByName()
            {
                var baseDir = Path.GetFullPath(@"..\..\zips");
                var zipPath = Path.Combine(baseDir,
                    string.Format("{0}.zip", DateTime.Now.ToString("yyyyMMddHHmmss")));
                var zipFix = Path.Combine(baseDir, "20151202194926.zip");
    
                var imgDir = Path.GetFullPath(@"..\..\img");
                var files = Directory.GetFiles(imgDir);
    
                var bCount = 0;
                var aCount = 0;
                byte[] content = null;
                //转换stream为byte[]
                Func<Stream, byte[]> toByteArray = (stream) =>
                {
                    byte[] bytes = new byte[stream.Length];
                    stream.Read(bytes, 0, bytes.Length);
                    // 设置当前流的位置为流的开始 
                    stream.Seek(0, SeekOrigin.Begin);
                    return bytes;
                };
                var fileName = "004.jpg";
                using (ZipFile zip = new ZipFile(zipFix))
                {
                    if (zip.ContainsEntry(fileName))
                    {
                        //在跟目录找
                        var entrys = zip.SelectEntries(fileName,"");
                        var entry = entrys.FirstOrDefault();
                        //将文件解压到内存流
                        using (var stream = new MemoryStream())
                        {
                            entry.Extract(stream);
                            stream.Seek(0, SeekOrigin.Begin);
                            content = toByteArray(stream);
                        }
                        
                        //在aa目录找
                        var entrys1 = zip.SelectEntries(fileName, "aa");
                        var entry1 = entrys.FirstOrDefault();
                    }
                }
                //创建文件
                var extractImg = Path.Combine(baseDir, fileName);
                File.WriteAllBytes(extractImg, content);
                Assert.IsTrue(File.Exists(extractImg));
            }
        }
    }