(PowerShell) 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.)

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

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

$xmp = New-Object Chilkat.Xmp

# Load a JPG or TIF image file.
$success = $xmp.LoadAppFile("qa_data/xmp/AJ_123642_1511.tif")
if ($success -ne $true) {
    $($xmp.LastErrorText)
    exit
}

$("Num embedded XMP docs: " + $xmp.NumEmbedded)

# This example assumes that XMP metadata is already present in the image file.
if ($xmp.NumEmbedded -eq 0) {
    $("No XMP metadata already exists..")
    exit
}

# Get the XMP metadata.

$xml = $xmp.GetEmbedded(0)

# Show the XML:
$($xml.GetXml())

# Update (overwrite) a string property.
$xmp.AddSimpleStr($xml,"NumberofTimes","123")

$success = $xmp.SaveAppFile("qa_output/updated.tif")
if ($success -ne $true) {
    $($xmp.LastErrorText)
    exit
}

$("Success.")