[BUG] How to upload IFormFile within an object model using refit in .Net core

[dev-vkagrawal]

Hi,

Can anyone tell how to upload file of type IFormFile within an object in .Net Core. If model contains IFormFile type then it is not working. I have used [Multipart] attribute and can't replace IFormFile to something else as I have used that across entire project.

[natelaff]

This is what I do...

API Client

    [Multipart]
    [Post("/me/picture")]
    Task<ApiResponse<object>> UploadPictureAsync([AliasAs("file")] StreamPart stream);

API signature

    [HttpPost("picture")]
    public async Task<IActionResult> PostPictureAsync(IFormFile file)

[dev-vkagrawal]

Hi natelaff, can you please tell me how would hit your refit method from .net core mvc action method and what if I have object to pass to web api and within that I have IFormFile property rather than calling API directly with single IFormFile property?

[natelaff]

I use something like

var file = Request.Form.Files[0];
await _client.UploadPictureAsync(new Refit.StreamPart(file.OpenReadStream(), file.FileName, file.ContentType));

[dev-vkagrawal]

But would it require me to change IFormFile in my api controller? How I can pass new Refit.StreamPart(...) as property of my existing model. I don't wanna call separate api with just image rather I wanna pass it as a whole object within my original model.

[natelaff]

No, you can see my definitions of the client and the API method above. I use IFormFile in the API, and StreamPart in the client.

EDIT: Oh, I see what you're saying. I don't know about that, I don't use uploads in a complex model. I have a separate Image upload API then post that URL with my object.

[dev-vkagrawal]

Ok thanks natelaff, I think I am left with either two API calls or convert IFormFile into byte[] in model. If you know any other solution then please let me know.

[MohamedErfan9]

@dev-vkagrawal please if you solve this issue please share with me

[DrLeh]

I have still not been able to make this work:

//refit api

        [Multipart]
        [Post("/api/cluster/deploy")]
        Task PostDeployAsync([AliasAs("file")] StreamPart stream);

//my backend controller
        [HttpPost("deploy"), DisableRequestSizeLimit]
        public async Task PostDeployAsync(IFormFile file)
        {

//blazor code
                <Blazorise.FileEdit Changed="@OnChanged"  />

    async Task OnChanged(FileChangedEventArgs e)
    {
            foreach (var file in e.Files)
            {
                var fs = file.OpenReadStream();
                await _api.PostDeployAsync(new StreamPart(stream, file.Name, "application/zip", file.Name));

In my controller the IFormFile file is null. What am i doing wrong?

[ordonezgrubi]

Im on the same boat. I have a scenario where I need to send data to an api that consumes a model with an List.

public class Class1{
[AliasAs("Name")]
public string Name { get; set; }
[AliasAs("Files")]
public IEnumerable Files { get; set; }
}

[Multipart]
[Post("/private/api-call")]
Task Post(Class1 data);

The files dont seem to work unless I do a Post([AliasAs("Files")] IEnumerable files);

[Strypper]

Hi any update on supporting upload complex object which have IFormFile in it ?

[Fram90]

Same problem here. IFormFile is a part of another model. Doesn't work with refit.

[alexx-grand]

@DrLeh
I use FromForm attribute and it works well
[FromForm(Name = "file")] IFormFile formFile