(MFC) Get a Structure Property Value from XMP

Demonstrates how to open a JPG or TIF image file, access the XMP metadata, and fetch the value of a structure property, such as the Iptc4xmpCore:CiTelWork (found within the Iptc4xmpCore:CreatorContactInfo structure).

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

See Also: Using MFC CString in Chilkat

#include <CkXmp.h>
#include <CkXml.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    CkXmp xmp;

    // Load a JPG or TIF image file.
    // Sample JPG's with XMP metadata may be found at:
    // http://www.chilkatsoft.com/testData/xmp/sample1.jpg
    // http://www.chilkatsoft.com/testData/xmp/sample2.jpg
    // http://www.chilkatsoft.com/testData/xmp/sample3.jpg
    bool success = xmp.LoadAppFile("sample1.jpg");
    if (success != true) {
        strOut.append(xmp.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    strOut.append("Num embedded XMP docs: ");
    strOut.appendInt(xmp.get_NumEmbedded());
    strOut.append("\r\n");

    // Assuming there is at least one, get the 1st.
    // (There is typically never more than one, but theoretically it's possible.)
    CkXml *xml = xmp.GetEmbedded(0);
    if (xmp.get_LastMethodSuccess() == true) {

        const char *propVal = xmp.getStructValue(*xml,"Iptc4xmpCore:CreatorContactInfo","Iptc4xmpCore:CiTelWork");
        if (xmp.get_LastMethodSuccess() != true) {
            strOut.append("Not found.");
            strOut.append("\r\n");
        }
        else {
            strOut.append(propVal);
            strOut.append("\r\n");
        }

        delete xml;

    }
    else {
        strOut.append(xmp.lastErrorText());
        strOut.append("\r\n");
    }



    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }