Add New Export Button in WFFM 3.4

Question

How can I add one more link in export action dropdown?

I have patched 'export form data to excel' link with instead and it is working fine with custom processor but I want to add one more link/button for this custom export.

<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/" xmlns:set="http://www.sitecore.net/xmlconfig/set/">
  <sitecore>
    <pipelines>
      <exportToExcel>
        <processor patch:instead="processor[@type='Sitecore.WFFM.Services.Pipelines.ExportToExcel.ExportFormDataToExcel, Sitecore.WFFM.Services']" type="Website.Shared.Pipeline.CustomExportToExcel, Website.Shared" />
      </exportToExcel>
    </pipelines>    
  </sitecore>  
</configuration>

Answer 1

1. Login to Sitecore backend
2. Switch DB to core
3. Insert new item under /sitecore/client/Applications/WFFM/Resources/Parameters/ActionControl Parameters/ActionColumn/
4. Add new item with call of your JavaScript function. E.g.: javascript:app.doSomething()
5. Open \sitecore\shell\client\Applications\WFFM\Pages\FormReport\FormReport.js file and add function doSomething to it. You can call any action from any controller with any parameters from your Javascript function.
6. Create new pipeline and processor for it
7. Execute new pipeline inside your action in controller by CorePipeline.Run("doSomething", formExportArgs);

Here is for example disassembled code of default endpoint(action in WFFM controller). You can use it as example:

        [ValidateHttpAntiForgeryToken]
        public ActionResult Export(Guid id, int format)
        {
            Assert.ArgumentNotNull(id, "id");
            Assert.ArgumentNotNull(format, "format");
            bool flag = format == 0;
            Item itemFromMasterDatabase = this.itemRepository.GetItemFromMasterDatabase(new ID(id));
            Assert.IsTrue(itemFromMasterDatabase != null, "Can't find the form.");
            Job job = Context.Job;
            if (job != null)
            {
                job.Status.LogInfo(DependenciesManager.ResourceManager.Localize("READING_DATA_FROM_DATABASE"));
            }
            IEnumerable<FormData> formData = this.FormsDataProvider.GetFormData(id);
            FormExportArgs formExportArgs = new FormExportArgs(this.itemRepository.CreateFormItem(itemFromMasterDatabase), new FormPacket(formData), this.webUtil.GetTempFileName(), flag ? "text/xml" : "application/vnd.ms-excel");
            formExportArgs.Parameters.Add("contextUser", Context.User.Name);
            CorePipeline.Run(flag ? "exportToXml" : "exportToExcel", formExportArgs);
            return base.Json(new
            {
                File = formExportArgs.FileName
            }, JsonRequestBehavior.AllowGet);
        }