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

Chilkat.Xmp xmp = new Chilkat.Xmp();

// Load a JPG or TIF image file.
bool success = xmp.LoadAppFile("qa_data/xmp/AJ_123642_1511.tif");
if (success != true) {
    Debug.WriteLine(xmp.LastErrorText);
    return;
}

Debug.WriteLine("Num embedded XMP docs: " + Convert.ToString(xmp.NumEmbedded));

// This example assumes that XMP metadata is already present in the image file.
if (xmp.NumEmbedded == 0) {
    Debug.WriteLine("No XMP metadata already exists..");
    return;
}

// Get the XMP metadata.
Chilkat.Xml xml = null;
xml = xmp.GetEmbedded(0);

// Show the XML:
Debug.WriteLine(xml.GetXml());

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

success = xmp.SaveAppFile("qa_output/updated.tif");
if (success != true) {
    Debug.WriteLine(xmp.LastErrorText);
    return;
}

Debug.WriteLine("Success.");