Start a workflow with Sharepoint (JavaScript)

spservices-startworkflow.js

/**
 * Start a workflow
 * 
 * @param  {Object} params
 *   @param {String} params.listName The name of the list
 *   @param {Number} params.itemID The item ID
 *   @param {String} params.workflowName The name of the workflow
 *   @param {Array|Object} [params.parameters] An array of object with {Name:"Name of the parameter", Value:"Value of the parameter"}
 *   @param {Function} [params.after] Callback after the request is done
 */
function startWorkflow(params) {
  // we need to make sure that SP.ClientContext is loaded
  if (SP.ClientContext == undefined) {
    setTimeout(function() { startWorkflow(params) }, 100);
     return
  }
  
  params.after = params.after || (function() {});
  if (!params.workflowName) { alert("Please provide the workflow name!"); return; }

  function onQuerySucceeded() {
    var enumerator = workflows.getEnumerator();
    while (enumerator.moveNext()) {
      var workflow = enumerator.get_current();

      if (workflow.get_name() == params.workflowName) {
        var url = 'http://' + window.location.hostname + item.get_item("FileRef");
        var templateId = '{' + workflow.get_id().toString() + '}';
        var workflowParameters = "<root />";
        if (params.parameters) {
          var p;
          if (params.parameters.length == undefined) p = [ params.parameters ];
          p = params.parameters.slice(0);
          workflowParameters = "<Data>";
          for (var i=0; i<p.length; i++)
            workflowParameters += "<"+p[i].Name+">"+p[i].Value+"</"+p[i].Name+">";
          workflowParameters += "</Data>";
        }
        // trigger the workflow
        jQuery().SPServices({
          operation:"StartWorkflow",
          async:true,
          item:url,
          templateId:templateId,
          workflowParameters:workflowParameters,
          completefunc:params.after
        });
      break;
      }
    }
  }
  function onQueryFailed() { throw "Error with Start workflow" }

  //var guid = new SP.Guid(__GlobalConfig.listID['Requested']);
  var context = SP.ClientContext.get_current();
  var lists = context.get_web().get_lists();
  var list = lists.getByTitle(params.listName);
  var item = list.getItemById(params.itemID);
  var file = item.get_file();

  context.load(list);
  context.load(item);

  var workflows = list.get_workflowAssociations();
  context.load(workflows);

  context.executeQueryAsync(onQuerySucceeded, onQueryFailed);
}

Thank you very much! Works good on SP2010.

@gendalf7771 It's really work on SP2010? Could you help me? I even can't find and load SP.WorkflowServices.js (( Is there it in free access? Thank's!

How to use it on sharepoint 2013? This is a sample

`<script src="../../SiteAssets/jquery.SPServices-2014.02.min.js" type="text/javascript"></script> 
<script src="../../SiteAssets/jquery.SPServices-2014.02.js" type="text/javascript"></script>
<script type="text/javascript">

 $("#btnSubmit").click(function() 
{ $().SPServices({ operation: "StartWorkflow",
 item:"../../Workflows/SubmitWF/SubmitWF.xoml",
 templateId:"{04ee1c93-f6b7-49b3-a79c-fa3142ecd688}", worflowParameters:"<root/>" }); }); 
</script>`

Can you please help me by providing how can we the access the parameters passed in the above code example (params.parameters) in SPD 2010 or SPD 2013

Hey, @Aymkdn

I have a small improvement for your code:
Instead setting a timeout at the beginning, there's a sharepoint function that waits for scripts to be loaded. It's easy to use:

SP.SOD.executeOrDelayUntilScriptLoaded(function() { YOUR CODE HERE }, "sp.js");

This way your script waits until sp.js is loaded, which provides the SP.ClientContext for your async query.
I use this a lot in my SP scripts, it provides more performance than setting a timeout.

Thanks for sharing this snippet, it's very useful! :)

how to make this in office 365 , I have tired this but not working with me.