Change simple values in XMP EPS metadata |.NET

You can check the quality of Aspose.Page XMP Metadata working with Metadata web app

In order to change simple values in XMP metadata of EPS file it is necessary to do several steps:

1. Initialize an input stream for input EPS file.
2. Create an instance of PsDocument from created earlier input stream.
3. Get an instance of XmpMetadata from the PsDocument. If given EPS file doesn’t contain XMP metadata the new one will be created, filled in with values from PS metadata comments and returned to you.
4. Now you can change values of metadata fields.
5. Initialize an output stream for output EPS file.
6. Save EPS file with changed XMP metadata.

The following code snippet shows how to change simple values in XMP metadata of EPS file in C#:

// Change values in XMP metadata in EPS document.

// Initialize EPS file input stream
System.IO.FileStream psStream = new System.IO.FileStream(DataDir + "get_input.eps", System.IO.FileMode.Open, System.IO.FileAccess.Read);

// Create PsDocument instance from stream
PsDocument document = new PsDocument(psStream);

string outputFileName = "change_values_out.eps";
DateTime now = DateTime.UtcNow;

try
{
    // Get XMP metadata. If EPS file doesn't contain XMP metadata we get new one filled with values from PS metadata comments (%%Creator, %%CreateDate, %%Title etc)
    XmpMetadata xmp = document.GetXmpMetadata();

    //Change XMP metadata values


    // Change ModifyDate value                
    xmp["xmp:ModifyDate"] = now;

    // Change Creator value
    XmpValue value = new XmpValue("Aspose.Page");
    xmp.Add("dc:creator", value);

    // Change Title value
    value = new XmpValue("(change_values.eps)");
    xmp.Add("dc:title", value);

    // Save EPS file with changed XMP metadata

    // Create ouput stream
    using (System.IO.FileStream outPsStream = new System.IO.FileStream(OutputDir + outputFileName, System.IO.FileMode.Create, System.IO.FileAccess.Write))
    {
        // Save EPS file
        document.Save(outPsStream);
    }
}
finally
{
    psStream.Close();
}

See changing simple values in XMP metadata in Java and C++.

Evaluate XMP metadata working online on our Metadata application.

You can download examples and data files from GitHub.