(MFC) Unzip Some Files by Iterating over Entries

Demonstrates how to unzip specific files by iterating over entries in a .zip.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkZip.h>
#include <CkStringBuilder.h>
#include <CkZipEntry.h>

void ChilkatSample(void)
    {
    CkString strOut;

    // This requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkZip zip;

    // Open a .zip containing:
    // 
    // a1.xml
    // b1.xml
    // c1.xml
    // dir1/a2.xml
    // dir1/c2.xml
    // dir2/dir3/c3.xml

    // We wish to unzip only a1.xml, b1.xml, and c1.xml
    bool success = zip.OpenZip("qa_data/zips/xml_files.zip");
    if (success != true) {
        strOut.append(zip.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    CkStringBuilder sbFilename;

    int numEntries = zip.get_NumEntries();
    int i = 0;
    while (i < numEntries) {
        CkZipEntry *entry = zip.GetEntryByIndex(i);

        const char *entryFilePath = entry->fileName();
        strOut.append(entryFilePath);
        strOut.append("\r\n");

        if (entry->get_IsDirectory() == false) {
            sbFilename.SetString(entryFilePath);
            if (sbFilename.Contains("/",false) == false) {
                // Does not contain "/"
                // Unzip to the qa_output directory.
                success = entry->Extract("qa_output");
                if (success == false) {
                    strOut.append("Failed to unzip ");
                    strOut.append(entryFilePath);
                    strOut.append("\r\n");
                }
                else {
                    strOut.append("Unzipped ");
                    strOut.append(entryFilePath);
                    strOut.append("\r\n");
                }

            }

        }

        delete entry;

        i = i + 1;
    }



    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }