How can I get a count of records in a DB?

Question

If I want to get a count of the number of records in a table how do I do it?

Answer 1

Generally, it's good practice to close the connection once you're done with it unless you have a reason to keep going back to it, in which case it probably becomes a performance issue. If you need to keep accessing the same connection repeatedly while your form is running (in Acrobat), I think you would be best to leave it open after initialization.<br /><br />You might consider placing the code which counts the records into a function inside a Script Object. This way, you can just call the Script Object method and retrieve the record count whenever you need it.<br /><br />Make sure you define the <b>oDB</b> variable outside the function but inside the Script Object:<br /><pre>var oDB = null;<br /><br />function GetRecordCount()<br />{<br />  if (oDB == null)<br />  {<br />    var sDataConnectionName = "<value>"; // example - var sDataConnectionName = "MyDataConnection"; <br /><br />    // Search for sourceSet node which matchs the DataConnection name <br />    var nIndex = 0; <br />    while(xfa.sourceSet.nodes.item(nIndex).name != sDataConnectionName) <br />    { <br />      nIndex++; <br />    } <br /><br />    var oDB = xfa.sourceSet.nodes.item(nIndex); <br />    oDB.open();<br />  }<br /><br />  oDB.first(); <br /><br />  // Search node with the class name "command" <br />  var nDBIndex = 0; <br />  while(oDB.nodes.item(nDBIndex).className != "command") <br />  { <br />    nDBIndex++; <br />  } <br /><br />  // Backup the original settings before assigning BOF and EOF to stay <br />  var sBOFBackup = oDB.nodes.item(nDBIndex).query.recordSet.getAttribute("bofAction"); <br />  var sEOFBackup = oDB.nodes.item(nDBIndex).query.recordSet.getAttribute("eofAction"); <br /><br />  oDB.nodes.item(nDBIndex).query.recordSet.setAttribute("stayBOF", "bofAction"); <br />  oDB.nodes.item(nDBIndex).query.recordSet.setAttribute("stayEOF", "eofAction"); <br /><br />  var itemCount = 0; <br /><br />  while(!oDB.isEOF()) <br />  { <br />    itemCount++; <br />    oDB.next(); <br />  } <br /><br />  // Restore the original settings <br />  oDB.nodes.item(nDBIndex).query.recordSet.setAttribute(sBOFBackup, "bofAction"); <br />  oDB.nodes.item(nDBIndex).query.recordSet.setAttribute(sEOFBackup, "eofAction"); <br /><br />  return itemCount;<br />}</pre><br />You can create a script object by right-clicking on the top-level form node ("form1" by default). Say you name your script object "Utils", you can then call the function inside of it from any event script like this:<br /><pre>this.rawValue = Utils.GetRecordCount();</pre><br />Stefan<br />Adobe Systems