如何使用FormData向MVC Action提交文件

我正在創(chuàng)建一個(gè)ASP.NETCore 6文件上傳應(yīng)用程序。這是我的代碼：

FORM

<form asp-controller="Home" asp-action="UploadFiles" method="post" enctype="multipart/form-data" id="uploadForm">
    <input type="file" class="form-control-file" multiple name="files">
    @foreach (var folder in @Model.Folders)
    {
        <input id="filePathUrl" type="radio" asp-for="Folders" value="@folder" />
        @folder
    }
<button type="submit" class="btn custom-button">Upload Files</button>

jQuery

    function processFiles(confirmOverwrite = false){
    const filePath = $("#filePathUrl").val();
    const fileList = $(".form-control-file")[0].files;
    const files = Array.from(fileList);

    let formData = new FormData();
    files.forEach(file => formData.append("files[]", file));

    const URL = '@Url.Action("UploadFiles", "Home")';

    $.ajax({
        url: URL + '?folders=' + filePath + '&confirmOverwrite=' + confirmOverwrite,
        type: 'post',
        data: formData,
        // dataType: 'json',
        contentType: false,
        processData: false,
              ...

MVC Action

       [HttpPost]
    public async Task<JsonResult> UploadFiles(IEnumerable<IFormFile> files, string folders, bool confirmOverwrite = false)
    {
        List<string> existingFiles = new();
        var filesToBeSaved = new List<(IFormFile file, string filePath)>();
        
        foreach (var file in files)
        {
            string trimmedFileName = file.FileName.Replace(" ", "");
            var filePath = Path.Combine(folders, trimmedFileName);

            if (System.IO.File.Exists(filePath) && !confirmOverwrite)
            {
                existingFiles.Add(file.FileName + "(" + trimmedFileName + ")");
            }
            else
            {
                filesToBeSaved.Add((file, filePath));
            }
        }
       ...

我刪除了很多代碼，以保持相關(guān)和簡(jiǎn)單。

為什么提交表單時(shí)文件參數(shù)顯示為空？？