Get uploaded files from BizFormItem

Its a little old but... This may help you

string fileNameString = "605b0932-660c-43cf-b2e0-b5ccf519f75f.png/originalFileName.png";

BasicForm bf = new BasicForm();

string fileName = bf.GetGuidFileName(fileNameString);
string filePath = FormHelper.GetBizFormFilesFolderPath(CMSContext.CurrentSiteName) + fileName;

if (File.Exists(filePath))
{
FileStream stream = new FileStream(filePath, FileMode.Open, FileAccess.Read);

// Add attachment
Attachment attachment = new Attachment(stream, bf.GetFileNameForUploader(fileNameString));
}

How can I obtain the file name from the form?

You should be able to pull the file name or a GUID from the form data

We are on Kentico 9, bz.GetGuidFileName() doesn't exist anymore neither does FormHelper.GetBizFormFilesFolderPath(). Is there any example how to read an uploaded file from a BizForm in Kentico 9 ?

Looks like you need to use CMS.OnlineForms now See the OnlineForms API reference here You might be able to use something like BizFormItem.GetExternalPath

There are some API examples here that might help

BizFormItem.GetExternalPath is a protected method of the BizFormItem class. Is there any other way ?

using CMS.Base;
using CMS.OnlineForms;
using CMS.IO;

/// <summary>
/// Partial class that allows you to register custom handler methods and classes.
/// Adds the CustomFormHandlers attribute to the partial class.
/// </summary>
[CustomFormHandlers]
public partial class CMSModuleLoader
{
    /// <summary>
    /// Custom attribute class.
    /// </summary>
    private class CustomFormHandlers: CMSLoaderAttribute
    {
        /// <summary>
        /// Called automatically when the application starts
        /// </summary>
        public override void Init()
        {
            // 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;
        }

        /// <summary>
        /// Handles the form data when users create new records for the 'ContactUs' form
        /// </summary>
        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 == "bizform.contactus")
            {
                string firstNameFieldValue = formDataItem.GetStringValue("FirstName", "");
                string lastNameFieldValue = formDataItem.GetStringValue("LastName", "");


                // Perform any required logic with the form field values
                 FileInfo file_info = formDataItem.GetFileInfo("Attachment");
                 //You can get the data you need from the file_info including read the data stream in & send the stream to an external service.
                 string file_path_and_name = file_info.FullName;
            }
        }
    }
}