上傳文件 - ASP.NET Core MVC

Question

我的 ASP.NET Core 項目中有一個聯系表單，它可以工作。 但是現在，我想上傳一個文件。 這是我的代碼：

模型：

namespace WebApplication1.Models
{
    public class MailModels
    {
        [StringLength(5)]
        public string Name { get; set; }
        [StringLength(5)]
        public string SurName { get; set; }
        //[StringLength(5, ErrorMessage = "First name cannot be longer than 50 characters.")]

        public string Email { get; set; }
        public string Telephone { get; set; }
        [StringLength(1000)]
        public string Message { get; set; }
        public IFormFile FileUploading { get; set; }
    }
}

視圖（部分視圖）：

<label class="file_uploading">
    @Html.TextBoxFor(m => m.FileUploading, new { type = "file", @class = "input-file" })
</label>

控制器（控制器的一部分）：

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Index2(MailModels e, IFormFile file)
{
    if (ModelState.IsValid)
    {
        StringBuilder message = new StringBuilder();
        MailAddress from = new MailAddress(e.Email.ToString());
        message.Append("Name: " + e.Name + "\n");
        message.Append("Surname: " + e.SurName + "\n");
        message.Append("Email: " + e.Email + "\n");
        message.Append("Telephone: " + e.Telephone + "\n\n\n");
        message.Append("Text: " + e.Message + "\n");

        MailMessage mail = new MailMessage();
        SmtpClient smtp = new SmtpClient();
        // .....

Answer 1

首先，從參數中刪除MailModels e ，並查看本教程以獲取完整參考

編輯1：
您的代碼應如下所示：

[HttpPost("UploadFiles")]
public async Task<IActionResult> Post(List<IFormFile> files)
{
long size = files.Sum(f => f.Length);

// full path to file in temp location
var filePath = Path.GetTempFileName();

foreach (var formFile in files)
{
    if (formFile.Length > 0)
    {
        using (var stream = new FileStream(filePath, FileMode.Create))
        {
            await formFile.CopyToAsync(stream);
        }
    }
}

// process uploaded files
// Don't rely on or trust the FileName property without validation.

return Ok(new { count = files.Count, size, filePath});
}

你的表格應該是這樣的：

<form method="post" enctype="multipart/form-data" asp-controller="UploadFiles" asp-action="Index">