(MFC) Unzip Encrypted Text into a String Variable

Demonstrates how to open an encrypted .zip archive and unzip a text file directly into a string variable.

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

See Also: Using MFC CString in Chilkat

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

void ChilkatSample(void)
    {
    CkString strOut;

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

    CkZip zip;

    // Set the password required for decrypting.
    zip.put_DecryptPassword("myPassword");

    bool success = zip.OpenZip("encrypted.zip");
    if (success != true) {
        strOut.append(zip.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Locate the file within the Zip to be unzipped into a string variable:
    CkZipEntry *entry = zip.FirstMatchingEntry("*.csv");
    if (zip.get_LastMethodSuccess() == false) {
        strOut.append("No matching entry found.");
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // lineEndingBehavior:
    // 0 = leave unchanged.
    // 1 = convert all to bare LF's
    // 2 = convert all to CRLF's
    int lineEndingBehavior = 0;
    const char *srcCharset = "utf-8";

    const char *strCsv = entry->unzipToString(lineEndingBehavior,srcCharset);
    strOut.append(strCsv);
    strOut.append("\r\n");
    delete entry;


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }