小编Mr.*_*eys的帖子

因此，要么没有人尝试这样做，要么我只是在上面找不到任何东西。您上传文件的旧方式是这样的：

public class FileStorage
{
    public string FileName { get; set; }
    public byte[] FileStore { get; set; }
}

[HttpPost]
[ValidateAntiForgeryToken]
public async Task<ActionResult> Create(HttpPostedFileBase file)
{
    FileStorage fileAttachment = new FileStorage();
 
    using (Stream inputStream = file.InputStream)
    {
        MemoryStream memoryStream = inputStream as MemoryStream;
 
        //Check to see if stream returned is already a MemoryStream
        if(memoryStream == null)
        {
            memoryStream = new MemoryStream();
            inputStream.CopyTo(memoryStream);
        }
                
        fileAttachment.FileStore = memoryStream.ToArray();
        fileAttachment.FileName = file.FileName;
    }
 
    if (ModelState.IsValid)
    {
        db.FileAttachment.Add(fileAttachment);
        await db.SaveChangesAsync();
        return RedirectToAction("Index"); …