Hi, this is my first post about the programming and i dont want to explain theory things .. Just i want to post the c# code to unzip file .
the following code doesn't require the third party like sharpziplib.
using System.IO;
using System.Text;
using System.Collections.Generic;
using System.IO.IsolatedStorage;
namespace WP7UnzipFile
{
public class UnZipper
{
internal void UnzipFile(string filePath)
{
StreamResourceInfo fileInfo = App.GetResourceStream(new Uri(filePath, UriKind.Relative));
UnzipFile(ref fileInfo);
}
internal void UnzipFile(ref StreamResourceInfo fileInfo)
{
string[] fileNames = GetFileNamesFromZip(fileInfo.Stream);
foreach (string fileName in fileNames)
{
StreamResourceInfo audioFile = App.GetResourceStream(fileInfo, new Uri(fileName, UriKind.Relative));
if (audioFile != null)
SaveFile(audioFile.Stream, fileName);
}
}
private void SaveFile(Stream stream, string relativefilePath)
{
//int lastSlashPos = relativefilePath.LastIndexOf('/');
//int substringLen = relativefilePath.Length - relativefilePath.LastIndexOf('/');
//string fileName = relativefilePath.Substring(lastSlashPos + 1, substringLen - 1);
using (var appStore = IsolatedStorageFile.GetUserStoreForApplication())
{
if (appStore.FileExists(relativefilePath))
appStore.DeleteFile(relativefilePath);
CreateDirectory(appStore, relativefilePath);
using (IsolatedStorageFileStream isoStream = appStore.CreateFile(relativefilePath))
{
byte[] buffer = new byte[stream.Length];
using (BinaryWriter fileWriter = new BinaryWriter(isoStream))
{
stream.Read(buffer, 0, (int)stream.Length);
fileWriter.Write(buffer);
}
}
}
}
private void CreateDirectory(IsolatedStorageFile appStore, string relativefilePath)
{
if (relativefilePath.Contains("/"))
{
int lastSlashPos = relativefilePath.LastIndexOf('/');
int substringLen = relativefilePath.Length - relativefilePath.LastIndexOf('/');
string directoryName = relativefilePath.Remove(lastSlashPos, substringLen);
if (!string.IsNullOrEmpty(directoryName))
appStore.CreateDirectory(directoryName);
}
}
/// <summary>
/// Reads the file names from the header of the zip file
/// </summary>
/// <param name="zipStream">The stream to the zip file</param>
/// <returns>An array of file names stored within the zip file. These file names may also include relative paths.</returns>
private string[] GetFileNamesFromZip(System.IO.Stream zipStream)
{
List<string> names = new List<string>();
BinaryReader reader = new BinaryReader(zipStream);
while (reader.ReadUInt32() == 0x04034b50)
{
// Skip the portions of the header we don't care about
reader.BaseStream.Seek(14, SeekOrigin.Current);
uint compressedSize = reader.ReadUInt32();
uint uncompressedSize = reader.ReadUInt32();
int nameLength = reader.ReadUInt16();
int extraLength = reader.ReadUInt16();
byte[] nameBytes = reader.ReadBytes(nameLength);
names.Add(Encoding.UTF8.GetString(nameBytes, 0, nameLength));
reader.BaseStream.Seek(extraLength + compressedSize, SeekOrigin.Current);
}
// Move the stream back to the begining
zipStream.Seek(0, SeekOrigin.Begin);
return names.ToArray();
}
}
}
if written code creates any problem in Ur app.. Dont blame me..