How to – Download File from File Column using InitializeFileBlocksDownload and DownloadBlock Request (Dynamics 365/ CRM / Dataverse)

Sharing a sample code which we can use to download the file from the File Column

Also read –

File Attribute

Here we would download the below file uploaded to one of the contact records.

The sample code –

On calling the method –

We can see the file downloaded at the location specified

Here the file transfers are limited to a maximum of 16 MB in a single call. In case of more than 16 MB, we need to divide the data into 4 MB or smaller chunks, combine or join the downloaded data to form the complete file.

Get more details – Retrieve File Data

*interestingly enough we didn't get any error while trying to download files with size more than 16 GB by using the DownloadBlockRequest

Hope it helps..

private static void DownloadFile(CrmServiceClient svc, string *interestingly enough we didn't get any error while trying to download files with size entityName, Guid recordGuid, 
            string fileAttributeName, string filePath)
            var initializeFileBlocksDownloadRequest = new InitializeFileBlocksDownloadRequest
                Target = new EntityReference(entityName, recordGuid),
                FileAttributeName = fileAttributeName

            var initializeFileBlocksDownloadResponse = (InitializeFileBlocksDownloadResponse)

            DownloadBlockRequest downloadBlockRequest = new DownloadBlockRequest
                FileContinuationToken = initializeFileBlocksDownloadResponse.FileContinuationToken

            var downloadBlockResponse = (DownloadBlockResponse)svc.Execute(downloadBlockRequest);

            // Creates a new file, writes the specified byte array to the file,
            // and then closes the file. If the target file already exists, it is overwritten.

            File.WriteAllBytes(filePath + 


Author: Nishant Rana

I love working in and sharing everything about Microsoft.NET technology !

13 thoughts on “How to – Download File from File Column using InitializeFileBlocksDownload and DownloadBlock Request (Dynamics 365/ CRM / Dataverse)”

  1. Thanks. It is amazing how Microsoft can’t provide a simple example like this. I was staring at their documentation for 30 min. Meanwhile I read your post and get it up and running in 5 minutes. U rule

    Liked by 1 person

Please share your thoughts

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.

My Trial

It is my experience timeline.


Sharing my knowledge and experience about the Microsoft Power Platform.

Arpit Power Guide

a guide to powering up community

Welcome to the Blog & Website of Paul Andrew

Technical Leadership Centred Around the Microsoft Data Platform

Deriving Dynamics 365

Deriving Solutions and features on Power Platform/Dynamics 365

The CRM Ninja

Thoughts & musings from a Dynamics 365 Ninja!

D CRM Explorer

Learn about Microsoft Dynamics CRM Power Platform customization and implementation and other cool stuffs

Stroke // Jonas Rapp

I know pre-stroke. I will improve who I was.

Power Melange

Power Melange By Shalinee

Clavin's Blog

Power Automate - Power Apps - SharePoint Online - Azure - Nintex - K2 - Artificial Intelligence

Sat Sangha Salon

An Inquiry in Being

The Indoencers

The Influencers & Influences of Indian Music

Monika Halan's blog

Hand's-free money management

D365 Demystified

A closer look at Microsoft Dynamics 365.

Microsoft Mate (msftmate) - Andrew Rogers

Experienced consultant primarily focused on Microsoft Dynamics 365 and the Power Platform


Specific topics by Django Lohn on the whole Microsoft365 Stack

Manmit Rahevar's Blog

One Stop Destination for Microsoft Technology Solutions


Naturally Curious

Brian Illand

Power Platform and Dynamics 365

Steve Mordue MVP

A Microsoft Business Applications MVP

Subwoofer 101

Bass defines your home theater

SQLTwins by Nakul Vachhrajani

SQL Server tips and experiences dedicated to my twin daughters.

Everything D365

Discovering Azure DevOps and D365 Business Applications

Tech Wizard

Lets do IT Spells

XRM Tricks (Power Platform & Dynamics CRM )

Power Platform & Dynamics CRM


Mail to for queries and suggestions

Giving back to the community what I have learned

xrm CRM Dynamics

Dynamics CRM Technical & Functional Info

Dynamics 365 Blogs - Explained in unique way

Sometimes you need to look at things from different perspective.

CRM Keeper

Dynamics 365 Customer Engagement, CRM, Microsoft CRM, Dynamics CRM


Step into the world of a Dynamics 365 Consultant

Dianamics PCF Lady

Diana & Dynamics 365 & Power Platform

%d bloggers like this: