How to send multipart form data to asp net core web api


ASP.NET is a popular programming language used for building web . One common task in web development is sending multipart form data to an ASP.NET Core Web API. In this article, we will explore how to achieve this examples.

Sending Multipart Form Data

When sending multipart form data to an ASP.NET Core Web API, we need to use the to make the HTTP request. The HttpClient class provides methods for sending types of HTTP , including multipart form data.

Let's consider an example where we want to send a file along with some additional data to an ASP.NET Core Web API. We can achieve this by creating a MultipartFormDataContent and adding the file and additional data as HttpContent objects.

using (var client = new HttpClient())
    using (var content = new MultipartFormDataContent())
        // Add file
        var fileContent = new ByteArrayContent(fileBytes);
        content.Add(fileContent, "file", "filename.ext");

        // Add additional data
        content.Add(new StringContent("Additional Data"), "data");

        // Send the request
        var response = await client.PostAsync("", content);

        // Process the response
        if (response.IsSuccessStatusCode)
            // Success
            // Error

In the above example, we create an instance of the HttpClient class and a MultipartFormDataContent object. We then add the file as a ByteArrayContent object and the additional data as a StringContent object to the MultipartFormDataContent. Finally, we make a POST request to the specified API endpoint with the .


Sending multipart form data to an ASP.NET Core Web API can be achieved using the HttpClient class and the MultipartFormDataContent class. By the example provided in this article, you can easily send multipart form data to your ASP.NET Core Web API.

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