c# - 使用 MVC 3 上传文件

Question

我正在学习 mvc3。我的 Controller 中有以下代码

    [HttpPost]
    public ActionResult Accreditation(Accreditation accreditation)
    {
        if (ModelState.IsValid)
        {
            var fileUpload = Request.Files[0];
            var uploadPath = Server.MapPath("~/App_Data/uploads");

            using (var fs = new FileStream(Path.Combine(uploadPath, accreditation.PressCard.ToString()), FileMode.Create))
            {
                var buffer = new byte[fileUpload.InputStream.Length];
                fileUpload.InputStream.Read(buffer, 0, buffer.Length);

                fs.Write(buffer, 0, buffer.Length);
            }

            context.Accreditations.Add(accreditation);
            context.SaveChanges();

            return RedirectToAction("Index");  
        }


           ViewBag.PossibleNationalities = context.Nationalities;
            ViewBag.PossibleNchis = context.Nchis;
            ViewBag.PossibleMedia = context.Media;
            ViewBag.PossibleEmploymentStatus = context.EmploymentStatus;
            return View(accreditation);



    }
}

这是 View :

@using (Html.BeginForm("Accreditation", "Home", new { enctype = "multipart/form-data" },    FormMethod.Post))
{
   @Html.ValidationSummary(true)
.............
.............

<div class="editor-field">
       <input type="file" name="PressCard" id="PressCard" data-val-required="Press card is required" data-val="true"/>
         @Html.ValidationMessageFor(model => model.PressCard)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.Passport)
    </div>
    <div class="editor-field">
       <input type="file" name="Passport" id="Passport" data-val-required="ID/Passport is required" data-val="true"/>
        @Html.ValidationMessageFor(model => model.Passport)
    </div>

...... …………

当我尝试上传时，收到以下错误消息:

异常详细信息:System.ArgumentOutOfRangeException:索引超出范围。必须为非负数且小于集合的大小。 参数名称:索引

有人能指出正确的方向吗？

<小时/>

抱歉耽搁了。这是新代码

[HttpPost]
public ActionResult Accreditation(Accreditation accreditation, HttpPostedFileBase Passport)
    {
        if (ModelState.IsValid)
        {
            var uploadPath = Server.MapPath("~/App_Data/uploads");

            using (var fs = new FileStream(Path.Combine(uploadPath, accreditation.PressCard.ToString()), FileMode.Create))
            {
                var buffer = new byte[Passport.InputStream.Length];
                Passport.InputStream.Read(buffer, 0, buffer.Length);

                fs.Write(buffer, 0, buffer.Length);
            }

            context.Accreditations.Add(accreditation);
            context.SaveChanges();

            return RedirectToAction("Index");  
        }


           ViewBag.PossibleNationalities = context.Nationalities;
            ViewBag.PossibleNchis = context.Nchis;
            ViewBag.PossibleMedia = context.Media;
            ViewBag.PossibleEmploymentStatus = context.EmploymentStatus;
            return View(accreditation);



    }
}

Answer 1

真的在上传数据吗？我建议你用这种方式。创建一个与输入字段同名的 HttpPostedFileBase 类型参数，并测试其内容长度属性。

不要忘记对参数和输入标记使用相同的名称。

检查此链接将是您继续前进的最快方式。

MVC 3 file upload and model binding