C# - System.IO.InvalidDataException: 'End of Central Directory record could not be found.'

Question

C# - System.IO.InvalidDataException: 'End of Central Directory record could not be found.'

Spamzilla 41

Basically, I have a program that reads a .ZIP file then saves it back to the hard disc. Although C# crashes with the 'System.IO.InvalidDataException: 'End of Central Directory record could not be found.' a program called 7-Zip opens and extracts valid data from this archive. My code is similar to this:

byte[][] jaggedDataArray;  
  
private void Open_ZIP_File(string tempFileName)  
{  
         System.IO.FileStream tempZipFileStream = new System.IO.FileStream(tempFileName, System.IO.FileMode.Open);  
         ZipArchive tempZipArchive = new ZipArchive(tempZipFileStream, ZipArchiveMode.Read);	// This is where it crashes the second time  
  
         jaggedDataArray = new byte[tempZipArchive.Entries.Count][];  
  
         myListView.BeginUpdate();  
  
         foreach (ZipArchiveEntry tempZAE in tempZipArchive.Entries)  
         {  
             myListView.Items.Add(tempZAE.FullName);  
                 
             jaggedDataArray[myListView.Items.Count - 1] = new byte[tempZAE.Length];  
  
             System.IO.Stream tempStream = tempZAE.Open();  
  
             tempStream.Read(jaggedDataArray[myListView.Items.Count - 1], 0, (int)tempZAE.Length);  
         }  
  
         myListView.EndUpdate();  
         tempZipFileStream.Close();  
}  
  
  
private void Save_ZIP_File(object sender, EventArgs e)  
{         
       System.IO.FileStream tempZipFileStream = new System.IO.FileStream(".\\Test.ZIP", System.IO.FileMode.Create);  
       ZipArchive tempZipArchive = new ZipArchive(tempZipFileStream, ZipArchiveMode.Create);  
       ZipArchiveEntry tempZAE;  
  
       for (int ii = 0; ii < myListView.Items.Count - 1; ii++)  
       {  
  
           tempZAE = tempZipArchive.CreateEntry(myListView.Text);  
  
           System.IO.BinaryWriter tempBW = new System.IO.BinaryWriter(tempZAE.Open());  
  
           tempBW.Write(jaggedDataArray[ii]);  
  
           tempBW.Close();  
                     
       }  
  
       tempZipFileStream.Close();  
  
}

Jack J Jun 25,306 Reputation points

2022-12-22T09:19:02.46+00:00

@Spamzilla , Welcome to Microsoft Q&A, based on my test, the code you provided works for me. According to your error, you could refer to the answer to do some checking for the zip file.
Viorel 127K Reputation points

2022-12-22T10:49:55.667+00:00

If the problem persist, give a complete small project that reproduces the problem and has all of required files, and put in on OneDrive or GitHub etc., if possible.

2 answers

Your answer

Jack J Jun 25,306 Reputation points

2022-12-22T09:19:02.46+00:00

@Spamzilla , Welcome to Microsoft Q&A, based on my test, the code you provided works for me. According to your error, you could refer to the answer to do some checking for the zip file.
Viorel 127K Reputation points

2022-12-22T10:49:55.667+00:00

If the problem persist, give a complete small project that reproduces the problem and has all of required files, and put in on OneDrive or GitHub etc., if possible.

Answer 1

Agrawal, Saurabh 0

Please check below, Its resolved my issue https://www.carlrippon.com/zipping-up-files-from-a-memorystream/

0 comments

Answer 2

I found that when I used the 'using' keyword as in this link (https://learn.microsoft.com/en-us/dotnet/api/system.io.compression.ziparchiveentry?view=netframework-4.7.2) that the file saving/loading worked.

 private void Save_ZIP_File(object sender, EventArgs e)  
 {         
        using (System.IO.FileStream tempZipFileStream = new System.IO.FileStream(".\\Test.ZIP", System.IO.FileMode.Create))  
 {  
 using (ZipArchive tempZipArchive = new ZipArchive(tempZipFileStream, ZipArchiveMode.Create);)  
 {  
         ZipArchiveEntry tempZAE;  
  
 for (int ii = 0; ii < myListView.Items.Count - 1; ii++)  
         {  
            tempZAE = tempZipArchive.CreateEntry(myListView.Items[ii].Text);  
      
             using (System.IO.BinaryWriter tempBW = new System.IO.BinaryWriter(tempZAE.Open()))  
 {  
              tempBW.Write(jaggedDataArray[ii]);  
         tempBW.Close();      
 }  
         }  
 }  
  
 tempZipFileStream.Close();  
 }  
 }

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C# - System.IO.InvalidDataException: 'End of Central Directory record could not be found.'

2 answers

Your answer