C#•3mo ago

How to make upload file in ASP.NET Core?

any tutorial on how to make upload file in ASP.NET Core...via html, javascript, c# (backend code)..

6 Replies

Sossenbinder•3mo ago

https://learn.microsoft.com/en-us/aspnet/core/mvc/models/file-uploads?view=aspnetcore-8.0

Upload files in ASP.NET Core

How to use model binding and streaming to upload files in ASP.NET Core MVC.

Sossenbinder•3mo ago

There's an entire MSDN article on this IFormFile is probably the easiest way to do it

Unknown User•3mo ago

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MODiX•3mo ago

In case you did not read the docs: https://docs.microsoft.com/en-us/aspnet/core/mvc/models/file-uploads?view=aspnetcore-6.0 Client Code:

private readonly HttpClient _httpClient;

private static async Task UploadSampleFileAsync()
{
    await using var stream = File.OpenRead("./Test.txt");
    using var request = new HttpRequestMessage(HttpMethod.Post, "/api/whatever/upload");
    using var content = new MultipartFormDataContent
    {
        { new StreamContent(stream), "file", "Test.txt" }
    };

    request.Content = content;

    await client.SendAsync(request);
}

private readonly HttpClient _httpClient;

private static async Task UploadSampleFileAsync()
{
    await using var stream = File.OpenRead("./Test.txt");
    using var request = new HttpRequestMessage(HttpMethod.Post, "/api/whatever/upload");
    using var content = new MultipartFormDataContent
    {
        { new StreamContent(stream), "file", "Test.txt" }
    };

    request.Content = content;

    await client.SendAsync(request);
}

ServerCode:

[ApiController]
[Route("api/whatever")]
public class FileController : ControllerBase
{
    [HttpPost("upload")]
    public IActionResult Upload([FromForm] IFormFile file)
    {
        // code responsible for file processing
        return Ok();
    }
}

[ApiController]
[Route("api/whatever")]
public class FileController : ControllerBase
{
    [HttpPost("upload")]
    public IActionResult Upload([FromForm] IFormFile file)
    {
        // code responsible for file processing
        return Ok();
    }
}

The field's name in the body when doing the POST, needs to match the binded field in the Controler's Action https://media.discordapp.net/attachments/569261465463160900/1001188081069735936/unknown.png

Upload files in ASP.NET Core

How to use model binding and streaming to upload files in ASP.NET Core MVC.

Sossenbinder•3mo ago

TIL there's a tag for this, this must be a super regular question lol

Unknown User•3mo ago

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How to make upload file in ASP.NET Core?