I successfully uploaded a 3GB file using the TelerikUpload control in .NET 8, so there's not, or isn't any longer, a 2GB limitation.

maxAllowedContentLength appears to be an unsigned 32-bit integer, so we're currently limited to 4GB there.

MultipartBodyLengthLimit is a long integer, so no limitations there anytime soon!

As of this writing, Chrome seems to do better with throughput than FireFox.

But neither come close to using the full bandwidth available.

Maybe chunking or .NET 9 will fix it?

While we're waiting, rumor has it that .NET 9 will make it easier to do large file uploads?

For reference to anyone coming here, if you are using IIS Express to test, you will need to create a web.config file in the root folder of your project that contains the following:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <system.webServer>
        <security>
            <requestFiltering>
                <requestLimits maxAllowedContentLength="2048576000"/>   <----- your value, in bytes
            </requestFiltering>
        </security>
    </system.webServer>
</configuration>

That will get you past the IIS limitation that triggers "413.1 - Request Entity Too Large".

Next, you'll need this in your startup (your version may vary):

services.Configure<FormOptions>(x =>
{
    x.MultipartBodyLengthLimit = 4294967296; <------ your value, in bytes.  this is 4gb
});

I believe .NET still has a 2GB limitation somewhere that you can't bypass.  Maybe that'll be fixed in .NET 9?

Is this going to be completed any time soon? 

My Workaround is to ZIP the File. Shame, shame, shame on Telerik!!!!

Hi Marin

For me it's a bit frustrating seeing that new controls like "Blazor Signature" are prioritized in favor of an important feature request like big file uploads that has been reported now over 2 years ago.

Best

Giuseppe

 

Hi Marin. We have also urgent need for it. Any ETA?

 

Thanks

Giuseppe

Hi Frank,

thanks for your support, but its doesn't work. The App (Blazor WASM, MinimalApi) runs on Azure "App Service".

I added [RequestSizeLimit(256 * 1024 * 1024)] to the controller, but it doesn't work either.

Regards

Dominik

It is possible to make this work with the TelerikUpload component.  It's not easy, and doesn't have resume functionality, but it works.  I tested up to about 1.75gb in size.

There are other things you have to change as well to work around IIS restrictions.

@Dominik, you can try to increase your file upload size limit allowed by IIS. Here is a starting point, I did something similar: Allow ASP.NET Core & IIS to Handle Large File Uploads | Andyp.dev or IIS File Upload Size Limit - How we increase it? (bobcares.com)

I added this to my Startup.cs:

services.Configure<FormOptions>(options =>
            {
                // Set the limit to 256 MB
                options.MultipartBodyLengthLimit = 268435456;
            });

            services.Configure<IISServerOptions>(options =>
            {
                options.MaxRequestBodySize = 268435456;
            });

I can't recall if I did anything to a webconfig or not, but this should be a start. I think with .NET Core & .NET 5 the <IISServerOptions> might take care of that part. I tested this between networks and had no issues. I think the largest file I tried was just under 1GB in size, but I can't remember.

Hello,

I need an upload for large files now and not in a few years. Blazor has been out for 4 years now and there is no way to upload large files. Are you guys kidding me!!!?

Regards

Dominik

DevExpress has an upload control that works well with uploading large files if you use their chunking feature.  Telerik needs to add something similar. We dont always have control of the server endpoints. 

Hi, thanks for replying.

I don't understand.

Are you saying, if configured right, the Blazor upload component will handle files up to 2gb in size?

If so, can you point to me to what to change?

Right now I seem to be stuck. 

InputFile on .Net 6 handles it, but very very slowly, to the point of being unusable.

Telerik Upload works fine for tiny files, but fails instantly with large files.

 

Any update on this?

I am VERY disappointed to see this problem exists.  What's the point of the upload control?!?

My application uses large video files between 1 and 2gb in size, and I immediately get "file failed to upload".  Smaller files work fine.

Does Telerik have an expected deliver date for this new component?