I'm trying to compress and decompress file with ZipLibrary. But it doesn't works. Can anybody help me?

 Private Function Compress(data As Byte()) As Byte()
        Dim result As Byte() = Nothing
        Try
            Using memoryStream As New MemoryStream()
                Dim method As ZipCompression = ZipCompression.Deflate64
                Using zipOutputStream As New ZipOutputStream(memoryStream, method)
                    Using writer As New StreamWriter(zipOutputStream)
                        writer.Write(data)
                        writer.Flush()
                        result = memoryStream.ToArray()
                    End Using
                End Using
            End Using
        Catch ex As Exception
            MessageBox.Show(ex.Message)
        End Try
        Return result
    End Function

  Private Function UnCompress(data As Byte()) As Byte()
        Dim result As Byte() = Nothing
        Try
            Using memoryStream As New MemoryStream(data)
                Using zipInputStream As New ZipInputStream(memoryStream)
                    Using reader As New StreamReader(zipInputStream)
                        result = memoryStream.ToArray
                    End Using
                End Using
            End Using
        Catch ex As Exception

        End Try
        Return result
    End Function

Hello,

I used RadAsyncUpload control to accept a upload zip file. My zip file contains text delimiter files.  I am able to unzip it to a temporary directory, but if I try again with the same zip file I get error something like "...because it is being used by another process." (at line 17)

Below is my method to unzip:


Please help,

Thanks,
Sam

I have an application where I have been using the following code:

       using (ZipPackage zipPackage = ZipPackage.Open(stream, FileAccess.Read))
                    {
                        foreach (ZipPackageEntry file in zipPackage.ZipPackageEntries.ToList())
                        {
                            if (file.FileNameInZip.Equals("nsData.json"))
                            {
                                StreamReader streamReader = new StreamReader(file.OpenInputStream());
                                string jsonString = streamReader.ReadToEnd();
                            }
                       }
                 }

and it works as expected.

I have now tried to convert it to using ZipArchive instead, but I am having some problems.

I use the following code:

  using (ZipArchive archive = new ZipArchive(stream,ZipArchiveMode.Read, false, null))
                    {
                        System.Text.UTF8Encoding encoding = new System.Text.UTF8Encoding();

                        ZipArchiveEntry entry = archive.GetEntry("nsData.json");
                        if (entry != null)
                        {
                            Stream entryStream = entry.Open();
                            StreamReader reader = new StreamReader(entryStream);
                            string content = reader.ReadToEnd();


                        }
            }

And when it comes to the last line it gives the following exception:

{Telerik.Windows.Zip.InvalidDataException: Invalid block length
   ved Telerik.Windows.Zip.DeflateDecompressor.DecodeBits()
   ved Telerik.Windows.Zip.DeflateDecompressor.DecodeUncompressedBlock(Boolean& endOfBlock)
   ved Telerik.Windows.Zip.DeflateDecompressor.CheckDecodeState()
   ved Telerik.Windows.Zip.DeflateDecompressor.Decode()
   ved Telerik.Windows.Zip.DeflateDecompressor.Inflate(Byte[] bytes, Int32 offset, Int32 length)
   ved Telerik.Windows.Zip.DeflateDecompressor.ProcessTransform(Boolean finalBlock)
   ved Telerik.Windows.Zip.DeflateTransformBase.TransformBlock(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount, Byte[] outputBuffer, Int32 outputOffset)
   ved Telerik.Windows.Zip.OperationStream.Read(Byte[] buffer, Int32 offset, Int32 count)
   ved Telerik.Windows.Zip.CompressedStream.Read(Byte[] buffer, Int32 offset, Int32 count)
   ved System.IO.StreamReader.ReadBuffer()
   ved System.IO.StreamReader.ReadToEnd()
   ved NstPortalUCSL.ViewModel.ViewModelHandlers.DataSourceHandler.DataSouceHandler.<>c__DisplayClassb.<InitDataSources>b__8(Object sender, GetAllNstInstancesCompletedEventArgs args)
   ved NstPortalUCSL.NstPortalWsSvc.NstPortalWsClient.OnGetAllNstInstancesCompleted(Object state)}


I would be wery thankfull if you could explain to me what I am doing wrong.

Hi, i am ziping some .pdf files to after download, when I run at VS2010 the zip was create correct, but when deploy at server the zip was create with 1kb, the WinRar open and show an empty zip file. I don´t receive any error. If I create a small file(10MB) work well, the zip have about 70MB. But at production should be create zips with 1GB or more.

I tried in 2 servers, both with 8GB ram and Win 2008 64 bits.

For 1 specific file I get wrong data after char 813302

It doesnt seem related to the size of the file, larger files work fine.

I do have an example that reproduces this, but so far I have only been able to reproduce it with sensitive data.

After compressing/decompressing I get:

In the original it said:

So the two Field are swapped, also there is some strange tag RowAANdh in it that I cant explain, it looks like the RowGroup="88"

The code I use is below

The output I get is:

Loading file: ..\..\PowerBrowser.gpf
Length original: 5691434
Length after compress/decompress: 5657083
Index first difference: 813302 

Hello,
 
    I tried to compress a byte array in C# using Zip Library, but it seems I a missing something because every time I call compress sending a byte array parameter, I cannot decompress it correctly please see code as follows to compress


and the following is how I decompress it back and the function will return byte array as follows:


Thanks,

Levi

Where can I find the documentation for SpreadProcessing?

http://www.telerik.com/help/wpf/introduction.html Does not have anything yet.

I'm a user of UI for WPF.

Thank you.

Hi

I not figure out how to save a (large) binary file to disk from a zip-Package back to a file.

Thanks for help

Hi,

I'm trying to zip a PDF document but something goes wrong.
This is the code I use

Right before I add a PDF file of 7MB, the length of the compressedStream variable is 22 (bytes I think). After the AddStream the size is 142. I don't think that is correct. The sourcestream I add has a lenghth of 7.085.200. You can't zip an 7MB file into a 142 byte file.

What am I doing wrong?

Kind regards, 

Jan Buskens. 

Hi,

is it possible to encrypt and decrypt a ZipLirbary which is created with the RadZipLirbary? How to?

Thanks
best Regards
Rene