Windows Phone: Unzip / Extract Compressed Files for Silverlight

I’m don’t really understand why compress or zip function was not added to Silverlight or Windows Phone since the Silverlight package or Windows Phones xap file was actually a zip file. Windows Phone will need to unzip all file download from marketplace in order to install in the phone. While I’m looking for a third party library to unzip file in my Windows Phone app, I come across this REALLY small unzip utility for Silverlight, which re-use the existing functions in Silverlight to done the job. Great, this is just what I looking for and the best part of it, the size is really small. It is just a C Sharp file!

A very simple tutorial for REALLY small unzip utility for Silverlight was provided on his blog but I found a missing function in the code. The GetFileNamesInZip can’t be found by Visual Studio. After taking a quick look in the source file, I found out that the function name was changed to FileNamesInZip instead. Below are the same example but with corrected function name call instead.

private void LoadZipfile()
    WebClient c = new WebClient();
    c.OpenReadCompleted += new OpenReadCompletedEventHandler(openReadCompleted);
    c.OpenReadAsync(new Uri(""));

private void openReadCompleted(object sender, OpenReadCompletedEventArgs e)
    UnZipper unzip = new UnZipper(e.Result);
    foreach (string filename in unzip.FileNamesInZip())
        Stream stream = unzip.GetFileStream(filename);
        StreamReader reader = new StreamReader(stream);
        string contents = reader.ReadToEnd();

Download REALLY small unzip utility for Silverlight  

by Ooi Keng Siang via Ooiks’s Blog


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