Extracting Files from Zip Entry to Memory

To extract a file from a zip to memory variable (for instance, a Byte array), use the following function. First make sure to add these Imports (Visual Basic)/using (C#) statements at the top of the code:

Visual Basic	Copy Code
Imports C1.C1Zip and Imports System.IO

C#	Copy Code
using C1.C1Zip; and using System.IO

Then add the following code:

Visual Basic	Copy Code
Private Function GetDataFromZipFile(zipFileName As String, entryName As String) As Byte() ' Get the entry from the zip file. Dim zip As New C1ZipFile() zip.Open(zipFileName) Dim ze As C1ZipEntry = zip.Entries(entryName) ' Copy the entry data into a memory stream. Dim ms As New MemoryStream() Dim buf(1000) As Byte Dim s As Stream = ze.OpenReader() Try While True Dim read As Integer = s.Read(buf, 0, buf.Length) If read = 0 Then Exit While End If ms.Write(buf, 0, read) End While Finally s.Dispose() End Try s.Close() ' Return result. Return ms.ToArray() End Function

Visual Basic

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Private Function GetDataFromZipFile(zipFileName As String, entryName As String) As Byte()
    ' Get the entry from the zip file.
    Dim zip As New C1ZipFile()
    zip.Open(zipFileName)
    Dim ze As C1ZipEntry = zip.Entries(entryName)
    ' Copy the entry data into a memory stream.
    Dim ms As New MemoryStream()
    Dim buf(1000) As Byte
    Dim s As Stream = ze.OpenReader()
    Try
        While True
            Dim read As Integer = s.Read(buf, 0, buf.Length)
            If read = 0 Then
                Exit While
            End If
            ms.Write(buf, 0, read)
        End While
    Finally
        s.Dispose()
    End Try
    s.Close()
    ' Return result.
    Return ms.ToArray()
End Function

C#	Copy Code
private byte[] GetDataFromZipFile(string zipFileName, string entryName) { // Get the entry from the zip file. C1ZipFile zip = new C1ZipFile(); zip.Open(zipFileName); C1ZipEntry ze = zip.Entries[entryName]; // Copy the entry data into a memory stream. MemoryStream ms = new MemoryStream(); byte[] buf = new byte[1000]; using (Stream s = ze.OpenReader()) { for (;;) { int read = s.Read(buf, 0, buf.Length); if (read == 0) break; ms.Write(buf, 0, read); } } // There's no need to call close because of the C# 'using' // statement above but in VB this would be necessary. //s.Close(); // Return result. return ms.ToArray(); }

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private byte[] GetDataFromZipFile(string zipFileName, string entryName)
{
    // Get the entry from the zip file.
    C1ZipFile zip = new C1ZipFile();
    zip.Open(zipFileName);
    C1ZipEntry ze = zip.Entries[entryName];
    // Copy the entry data into a memory stream.
    MemoryStream ms = new MemoryStream();
    byte[] buf = new byte[1000];
    using (Stream s = ze.OpenReader())
    {
        for (;;)
        {
            int read = s.Read(buf, 0, buf.Length);
            if (read == 0) break;
            ms.Write(buf, 0, read);
        }
    }
    // There's no need to call close because of the C# 'using'
    // statement above but in VB this would be necessary.
    //s.Close();
    // Return result.
    return ms.ToArray();
}