Can I automate the writing of XMP metadata into JPEG and TIFF files?

Question

I have written an ASP.NET 3.5 website application on behalf of an annual international photographic competition. Entrants will be uploading digital photos in either JPEG or TIFF format. Ideally, I would write entrant identity and image title information into the XMP metadata for each image immediately after upload - but so far, I have failed to find any way to do this in ASP.NET.
Thousands of images are involved, so I need to find a way to automate the metadata insertion, perhaps with some sort of script that uses a text file (extracted from the SQL Server database on my website) as the source of the metadata for a batch of images. Is this the sort of task that can be done by writing a script for Bridge CS3? Are there any scripts already in existence that I could use? I am a total beginner in this area.
I use a Win XP PC, though I have a colleague who, I think, has CS3 on his Mac (running under the Leopard OS), so scripts for either platform might be usable.
David

Answer 1

You are the man X!
Ok here is another version with a check for the dll.
#target bridge 
   if( BridgeTalk.appName == "bridge" ) {
addInfo = new MenuElement("command", "Update Entry Details", "at the end of Thumbnail");
addInfo .onSelect = function () {
     main();
function main(){
var csv = File.openDialog("Please select CSV file.","CSV File:*.csv");
if(csv != null){
loadXMPScript();
csv.open("r");
while(!csv.eof){ 
   strInputLine = csv.readln();
   if (strInputLine.length > 3) {
      strInputLine = strInputLine.replace(/\\/g,'/');
   inputArray  = strInputLine.split(",");
   var csvFile = new File(inputArray[0]);
   var title = inputArray[1];
   var author = inputArray[2];
if(!csvFile.exists) {
alert(csvFile + " Does not exist"); //////////Check if file exists
return;
if(csvFile.exists){
var file = new Thumbnail(csvFile);
try{
var xmpFile = new XMPFile(file.path, XMPConst.UNKNOWN,XMPConst.OPEN_FOR_UPDATE);
}catch(e){
      alert("Problem opening xmp for update:-\r" + file.path +"\r" +e.message);
      return;
try{
var xmp = xmpFile.getXMP();
}catch(e){
      alert("Problem opening xmp data:-\r"  + e.message);
      return;
xmp.deleteProperty(XMPConst.NS_DC, "creator");
xmp.deleteProperty(XMPConst.NS_DC, "title");
try{
xmp.appendArrayItem(XMPConst.NS_DC, "creator", author, 0,XMPConst.ARRAY_IS_ORDERED);
xmp.appendArrayItem(XMPConst.NS_DC, "title", title, 0,XMPConst.ARRAY_IS_ORDERED);
}catch(e){
      alert("Problem writing xmp data:-\r"  + e.message);
      return;
if (xmpFile.canPutXMP(xmp)) {
xmpFile.putXMP(xmp);
}else{
alert("Can not write new metadata to " + csvFile.spec); 
xmpFile.closeFile(XMPConst.CLOSE_UPDATE_SAFELY);
unloadXMPScript();
function loadXMPScript()
   var results = new XMPLibMsg("XMPScript Library already loaded", 0, false);
   if (!ExternalObject.AdobeXMPScript)
      try
         ExternalObject.AdobeXMPScript = new ExternalObject('lib:AdobeXMPScript');    
         results.message = "XMPScript Library loaded";
      catch (e)
         alert("Could not load AdobeXMPScript \r" + e.message);
         results.message = "ERROR Loading AdobeXMPScript: " + e;
         results.line = e.line;
         results.error = true;
   return results;
function unloadXMPScript()
   var results = new XMPLibMsg("XMPScript Library not loaded", 0, false);
   if( ExternalObject.AdobeXMPScript )
      try
         ExternalObject.AdobeXMPScript.unload();
         ExternalObject.AdobeXMPScript = undefined;
         results.message = "XMPScript Library successfully unloaded";
      catch (e)
         results.message = "ERROR unloading AdobeXMPScript: " + e;
         results.line = e.line;
         results.error = true;
   return results;
function XMPLibMsg (inMessage, inLine, inError)
   this.message = inMessage;
   this.line = inLine;
   this.error = inError;