(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 <C_CkXmpW.h>
#include <C_CkXmlW.h>

void ChilkatSample(void)
    {
    HCkXmpW xmp;
    BOOL success;
    HCkXmlW xml;

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

    xmp = CkXmpW_Create();

    // Load a JPG or TIF image file.
    success = CkXmpW_LoadAppFile(xmp,L"qa_data/xmp/AJ_123642_1511.tif");
    if (success != TRUE) {
        wprintf(L"%s\n",CkXmpW_lastErrorText(xmp));
        CkXmpW_Dispose(xmp);
        return;
    }

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

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

    // Get the XMP metadata.

    xml = CkXmpW_GetEmbedded(xmp,0);

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

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

    success = CkXmpW_SaveAppFile(xmp,L"qa_output/updated.tif");
    if (success != TRUE) {
        wprintf(L"%s\n",CkXmpW_lastErrorText(xmp));
        CkXmpW_Dispose(xmp);
        return;
    }

    wprintf(L"Success.\n");


    CkXmpW_Dispose(xmp);

    }