(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_CkXmp.h>
#include <C_CkXml.h>

void ChilkatSample(void)
    {
    HCkXmp xmp;
    BOOL success;
    HCkXml xml;

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

    xmp = CkXmp_Create();

    // Load a JPG or TIF image file.
    success = CkXmp_LoadAppFile(xmp,"qa_data/xmp/AJ_123642_1511.tif");
    if (success != TRUE) {
        printf("%s\n",CkXmp_lastErrorText(xmp));
        CkXmp_Dispose(xmp);
        return;
    }

    printf("Num embedded XMP docs: %d\n",CkXmp_getNumEmbedded(xmp));

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

    // Get the XMP metadata.

    xml = CkXmp_GetEmbedded(xmp,0);

    // Show the XML:
    printf("%s\n",CkXml_getXml(xml));

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

    success = CkXmp_SaveAppFile(xmp,"qa_output/updated.tif");
    if (success != TRUE) {
        printf("%s\n",CkXmp_lastErrorText(xmp));
        CkXmp_Dispose(xmp);
        return;
    }

    printf("Success.\n");


    CkXmp_Dispose(xmp);

    }