Handle form events

You can run custom actions directly when form actions occur by implementing handlers for events of the BizFormItemEvents type. The system invokes the following events in response to form actions:

  • Update – invoked when a form record is updated.
  • Insert – invoked on each form submission.
  • Delete – invoked when a form record is deleted.

To access the data of the active form in the event handler, use the Item property (BizFormItem type) of the BizFormItemEventArgs parameter. The parameter is available for all form item event handlers.


using System;

using CMS;
using CMS.DataEngine;
using CMS.OnlineForms;

// Registers the custom module into the system
[assembly: RegisterModule(typeof(FormHandlerModule))]

public class FormHandlerModule : Module
    // Module class constructor, the system registers the module under the name "CustomFormHandlers"
    public FormHandlerModule()
        : base("CustomFormHandlers")

    // Contains initialization code that is executed when the application starts
    protected override void OnInit()

        // Assigns a handler to the BizFormItemEvents.Insert.After event
        // This event occurs after the creation of every new form record
        BizFormItemEvents.Insert.After += FormItem_InsertAfterHandler;

    // Handles the form data when users create new records for the 'ContactUs' form
    private void FormItem_InsertAfterHandler(object sender, BizFormItemEventArgs e)
        // Gets the form data object from the event handler parameter
        BizFormItem formDataItem = e.Item;

        // Checks that the form record was successfully created
        // Ensures that the custom actions only occur for records of the 'ContactUs' form
        // The values of form class names must be in lower case
        if (formDataItem != null && formDataItem.BizFormClassName.Equals("bizform.contactus", StringComparison.OrdinalIgnoreCase))
            string firstNameFieldValue = formDataItem.GetStringValue("FirstName", "");
            string lastNameFieldValue = formDataItem.GetStringValue("LastName", "");

            // Perform any required logic with the form field values

            // Variable representing a custom value that you want to save into the form data
            object customFieldValue = "customValue";

            // Sets and saves a value for the form record's 'CustomField' field
            formDataItem.SetValue("CustomField", customFieldValue);