异步图像文件保存

在 web mvc 项目中。

我

有以下功能，我正在尝试异步，因为我保存了许多文件，但它有点慢。我是否需要添加到任务列表中并等待所有任务：

   var fs = new FileSaver();
        property.FloorPlanPath = fs.SaveFile(propertyRentalForm.FloorPlanFile, "~/uploads/properties/floorplans");
        property.FloorPlan2Path = fs.SaveFile(propertyRentalForm.FloorPlan2File, "~/uploads/properties/floorplans");
        property.EpcPath = fs.SaveFile(propertyRentalForm.EpcFile, "~/uploads/properties/epc");
    public string SaveFile(HttpPostedFileBase file, string uploadPath)
    {
        if (file == null || file.ContentLength <= 0) return "";
        var fileName1 = Path.GetFileName(file.FileName);
        if (fileName1 == null) return "";
        // clean file name
        fileName1 = string.Format("{0}{1}",
            Path.GetFileNameWithoutExtension(fileName1).GetAliasTitle(),
            Path.GetExtension(fileName1));
        var path = Path.Combine(HttpContext.Current.Server.MapPath(uploadPath), fileName1);
        file.SaveAs(path);
        return fileName1;
    }