【修改】ZipHelper增加解压zip格式文件的功能；

Learun.Framework.Ultimate V7/Learun.Framework.Module/Learun.Util/Learun.Util/Web/ZipHelper.cs

@@ -71,5 +71,90 @@ namespace ZipOneCode.ZipProvider
                 }
             }
         }
+
+        /// <summary>  
+        /// 功能：解压zip格式的文件。  
+        /// </summary>  
+        /// <param name="zipFilePath">压缩文件路径</param>  
+        /// <param name="unZipDir">解压文件存放路径,为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹</param>  
+        /// <returns>解压是否成功</returns>  
+        public static bool UnZip(string zipFilePath, string unZipDir)
+        {
+            try
+            {
+                if (zipFilePath == string.Empty)
+                {
+                    throw new Exception("压缩文件不能为空！");
+                }
+                if (!File.Exists(zipFilePath))
+                {
+                    throw new FileNotFoundException("压缩文件不存在！");
+                }
+                //解压文件夹为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹  
+                if (unZipDir == string.Empty)
+                {
+                    unZipDir = zipFilePath.Replace(Path.GetFileName(zipFilePath), Path.GetFileNameWithoutExtension(zipFilePath));
+                }
+                if (!unZipDir.EndsWith("/"))
+                {
+                    unZipDir += "/";
+                }
+                if (!Directory.Exists(unZipDir))
+                {
+                    Directory.CreateDirectory(unZipDir);
+                }
+                using (var s = new ZipInputStream(File.OpenRead(zipFilePath)))
+                {
+
+                    ZipEntry theEntry;
+                    
+                    while ((theEntry = s.GetNextEntry()) != null)
+                    {
+                        string directoryName = Path.GetDirectoryName(theEntry.Name);
+                        string fileName = Path.GetFileName(theEntry.Name);
+                        if (!string.IsNullOrEmpty(directoryName))
+                        {
+                            Directory.CreateDirectory(unZipDir + directoryName);
+                        }
+                        if (directoryName != null && !directoryName.EndsWith("/"))
+                        {
+                        }
+
+                        if (fileName != String.Empty)
+                        {
+                            using (FileStream streamWriter = File.Create(unZipDir + theEntry.Name))
+                            {
+
+                                int size;
+                                byte[] data = new byte[2048];
+                                while (true)
+                                {
+                                    size = s.Read(data, 0, data.Length);
+                                    if (size > 0)
+                                    {
+                                        streamWriter.Write(data, 0, size);
+                                    }
+                                    else
+                                    {
+                                        break;
+                                    }
+                                }
+                                streamWriter.Close();
+                            }
+                        }
+                    }
+                    s.Close();
+                }
+                return true;
+            }
+            catch (Exception e)
+            {
+
+                return false;
+            }
+
+        }
+
+
     }
 }