Скачать или смотреть How to Add Multiple AddFile Entries in FLurl to Handle File Uploads

A comprehensive guide on implementing multiple file uploads using FLurl in C# . Learn how to modify your code for handling lists of files seamlessly.
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This video is based on the question https://stackoverflow.com/q/72457058/ asked by the user 'Steve' ( https://stackoverflow.com/u/4971859/ ) and on the answer https://stackoverflow.com/a/72457115/ provided by the user 'ProgrammingLlama' ( https://stackoverflow.com/u/3181933/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Add Multiple AddFile Entries in FLurl to Handle File Uploads

When working with file uploads in web applications, using a robust library like FLurl can make your life significantly easier. However, a common issue developers face is how to handle multiple file uploads when sending files to a web API. For instance, if you have a list of supporting documents that you want to upload, how can you modify your existing FLurl API calls to accommodate this? In this post, we’ll explore how to do just that!

The Problem

In your original setup, you might have code that looks something like this:

[[See Video to Reveal this Text or Code Snippet]]

This code only supports uploading a single file from the SupportingDocs list. If you need to upload multiple files, you'll need to enhance this logic.

The Solution

The solution to this issue is straightforward: use a foreach loop to iterate through the list of supporting documents and call AddFile on each item. The updated code would look like this:

[[See Video to Reveal this Text or Code Snippet]]

Breaking Down the Updated Code

Setting Query Parameters:

The first line remains unchanged; it sets the query parameters for the request URL.

Using PostMultipartAsync:

The PostMultipartAsync method is called with a lambda that allows for the addition of multiple files.

Iterating with foreach:

Here, we declare a foreach loop over the SupportingDocs list. Each document is accessed sequentially in the loop.

Adding Files:

Within the loop, we call AddFile for each doc, passing in the required file content and file name. This ensures that every document in the list is added to the multipart request.

Conclusion

Integrating multiple file uploads in FLurl is a simple matter of implementing a loop to handle your list of documents. By making this change to your code, you can effortlessly upload multiple files at once. This approach not only enhances the efficiency of your code, but also provides a better experience for users who need to submit multiple documents.

Feel free to implement this solution in your own projects, and enjoy the ease of handling file uploads with FLurl!