(Unicode C++) Update a String Property in XMP

Demonstrates how to open a JPG or TIF image file, access the XMP metadata, and update the value of a string property. (If the string property does not already exist, it is created.)

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#include <CkXmpW.h>
#include <CkXmlW.h>

void ChilkatSample(void)
    {
    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkXmpW xmp;

    // Load a JPG or TIF image file.
    bool success = xmp.LoadAppFile(L"qa_data/xmp/AJ_123642_1511.tif");
    if (success != true) {
        wprintf(L"%s\n",xmp.lastErrorText());
        return;
    }

    wprintf(L"Num embedded XMP docs: %d\n",xmp.get_NumEmbedded());

    // This example assumes that XMP metadata is already present in the image file.
    if (xmp.get_NumEmbedded() == 0) {
        wprintf(L"No XMP metadata already exists..\n");
        return;
    }

    // Get the XMP metadata.
    CkXmlW *xml = 0;
    xml = xmp.GetEmbedded(0);

    // Show the XML:
    wprintf(L"%s\n",xml->getXml());

    // Update (overwrite) a string property.
    xmp.AddSimpleStr(*xml,L"NumberofTimes",L"123");

    success = xmp.SaveAppFile(L"qa_output/updated.tif");
    if (success != true) {
        wprintf(L"%s\n",xmp.lastErrorText());
        return;
    }

    wprintf(L"Success.\n");
    }